YITOAマイクロテクノロジー List of Products and Services

In this document, we introduce development cases of "custom IC contract development (analog IC turnkey service)." We provide insights into the development process, solutions, and effects related to LCD drivers and light-receiving ICs for rotary encoders. It is also possible to remake ICs for components that have been discontinued (EOL). Before discontinuing your own products due to component EOL, please feel free to consult with us. This document serves as a useful reference when considering implementation. We encourage you to read it. [Featured Development Cases (Partial)] ■ LD Driver IC ■ Optical Communication Driver IC ■ Watchdog Reset IC ■ Dust Sensor IC ■ Illuminance Sensor ■ Photoelectric Sensor *For more details, please refer to the PDF document or feel free to contact us.

• Other contract services

In recent years, due to the circumstances of semiconductor manufacturers, both general-purpose and custom analog ICs have increasingly been discontinued (EOL) or made obsolete (discontinued). When the ICs you are using fall into this category, it is common to have no choice but to "search for a semiconductor manufacturer from scratch and request new design and manufacturing." However, due to factors such as the retirement of designers and a lack of shared technical data, there are also many customers who, constrained by insufficient man-hours or time and financial limitations, end up discontinuing their own products. To address the concerns of such customers, we offer the "Analog IC EOL/Discontinued Product Remake Service." This document explains the background of EOL/discontinued products and details about the service. [Contents (partial)] ■ Regarding the provision of the "EOL/Discontinued Product Remake Service"... ■ What are EOL/Discontinued products? ■ Background of EOL/Discontinued products ■ Possible to regenerate even without design data *For more details, please refer to the PDF document or feel free to contact us.

• Dedicated IC

This is a "MEMS mirror" for a compact optical scanner using MEMS technology. It can scan light in two dimensions, making it widely applicable for displays, measurements, and more. 【What is MEMS?】 MEMS stands for Micro Electro Mechanical Systems, commonly referred to as MEMS. It is an attractive cutting-edge technology that combines electrical and mechanical functions, enabling capabilities that were difficult with LSI that only has electrical functions. 【Features】 ■ Electromagnetic drive method ■ 2-axis MEMS mirror ■ Horizontal: resonant drive, vertical: non-resonant drive (raster scan) ■ Wide optical tilt angle ■ Long lifespan / high reliability ■ Low voltage drive / low power consumption ■ Flat mirror surface 【Main Applications】 ■ HUD (Head-Up Display) ■ Pico projectors ■ HMD (Head-Mounted Display) ■ 3D printers ■ 3D LiDAR, etc. The mirror can be widely used for optical scanners in applications ranging from displays to industrial uses! For more details, please refer to the PDF document or feel free to contact us.

• Sensors

We were designing a set using an illuminance sensor for a certain manufacturer, but due to the customer's specific optical design requirements, we were unable to achieve the desired light source dependency as intended by the customer. In response, our company produced multiple samples with finely tuned characteristics through small-scale mask modifications. These samples were evaluated by the customer, and an appropriate sample was adopted as a mass-produced product under the customer's environment. As a result, we were able to meet the customer's required sensitivity specifications and light source dependency through small-scale mask modifications, thereby minimizing additional costs. [Effects] ■ We were able to meet the customer's required sensitivity specifications and light source dependency through small-scale mask modifications, minimizing additional costs. ■ We were also able to standardize many parts of the mass production process, further minimizing additional costs in production. *For more details, please refer to the PDF document or feel free to contact us.

• Other semiconductors

Due to the discontinuation of an LED from a certain manufacturer, the customer decided to redevelop the photoelectric sensor module, considering cost reduction. During the timing of the visit, where the customer was contemplating purchasing from two companies and requesting custom IC development, the flow for custom IC development was established. Using our process, we achieved characteristics similar to the current product. Since there were process differences, we implemented circuit modifications to obtain similar characteristics. Additionally, we made changes to the PKG pin count and size from the conventional product to achieve cost reduction. As a result, we obtained characteristics equivalent to (desired) those of the conventional product, which also led to the development of further derivative products. [Effects] ■ Characteristics equivalent to (desired) those of the conventional product were achieved. ■ It was possible to lead to the development of further derivative products. *For more details, please refer to the PDF document or feel free to contact us.

• Other semiconductors

The technology for high-speed and long-distance optical communication is advancing at a remarkable pace. By combining photodetectors (PD) and circuits into a single chip, we are not only aiming for overall space-saving but also miniaturizing the chip itself, which requires further performance improvements, multifunctionality, and the development of high-quality products. Our company leverages the optical technology cultivated through OEIC and extensive mass production experience, along with the ability to conduct design and process development tailored to product specifications in-house, enabling us to achieve multifunctionality and superior performance compared to target products. As a result, we have been able to develop products that excel beyond the target products, including noise reduction, expansion of the recommended operating power range, and the addition of power, temperature monitoring, and shutdown functions. **Effects** - Noise reduction and expansion of the recommended operating power range - Development of superior products compared to target products, including the addition of power, temperature monitoring, and shutdown functions - Reduction of chip size by over 40% and package size by over 50% *For more details, please refer to the PDF document or feel free to contact us.*

• Other semiconductors

The user has been dedicating a lot of effort to adjusting and inspecting the environment to ensure that it does not affect the characteristics of the rotary encoder, and they needed a light-receiving IC for rotary encoders that is less susceptible to environmental influences. Our IC can minimize the impact of the surrounding environment. To facilitate a smooth replacement with our IC, we proposed an IC that has the same electrical and optical characteristics as other companies' ICs, while also matching the external dimensions and foot patterns. As a result, by reducing the impact of the surrounding environment on the characteristics, we were able to decrease the effort required for adjustments and inspections, achieving cost reductions for the user. [Effects] - Reduced the impact of the surrounding environment on characteristics, which was a challenge. - Decreased the effort required for adjustments and inspections, leading to cost reductions for the user. *For more details, please refer to the PDF document or feel free to contact us.

• Other semiconductors

The user is seeking to miniaturize the dust sensor module and streamline the inspection process. To achieve miniaturization, it is necessary to reduce the number of components. Therefore, our company has integrated the functions of the dust sensor module, which was composed of many discrete components such as light-receiving elements, into a dust sensor IC, enabling a reduction in the number of components and achieving the miniaturization of the dust sensor module. By successfully miniaturizing the dust sensor module and streamlining the inspection process, the user has been able to acquire new sales channels. [Effects] ■ Achieved miniaturization of the dust sensor module and streamlined the inspection process ■ The user was able to acquire new sales channels *For more details, please refer to the PDF document or feel free to contact us.

• Other semiconductors

In car navigation systems, the diversification of functions has led to an increase in the number of components. To implement all components on a limited circuit board, it has become necessary to consolidate and miniaturize each component. Our company uses wafer processes suitable for the product's application, achieving miniaturization of chip sizes without compromising quality. Furthermore, we have adopted a small, thin, bottom-mounted package (Plating Lead Package) from the existing SOP package. As a result, we have successfully achieved more than a 50% reduction in both chip size and package size compared to existing products, contributing to the suppression of circuit board size increases due to the rise in the number of components. [Effects] - Successfully achieved more than a 50% reduction in both chip size and package size compared to existing products. - Contributed to the suppression of circuit board size increases due to the rise in the number of components. *For more details, please refer to the PDF document or feel free to contact us.

• Other semiconductors

The LD driver IC that the user is using is a key component, but since it has not been purchased from two suppliers, it poses a risk from the perspective of business continuity (BCP), and it was necessary to address this urgently. To facilitate the user's smooth transition to dual sourcing with our IC, we proposed a pin-compatible IC that has electrical characteristics equivalent to those of other companies' ICs, and the same external dimensions and footprint. As a result, we were able to resolve the previously pending issue of business continuity (BCP). Due to the pin-compatible IC, the user can also purchase a greater quantity of cost-effective ICs. [Effects] ■ We were able to resolve the previously pending issue of business continuity (BCP). ■ Due to the pin-compatible IC, the user can purchase a greater quantity of cost-effective ICs. *For more details, please refer to the PDF document or feel free to contact us.

• Other semiconductors

The LCD driver requires a special process that achieves high voltage resistance, high precision, high speed, and low power consumption. There were customer complaints due to the oligopoly of a certain semiconductor manufacturer. Our company has a special process (BiCMOS, high voltage resistance) and has been developing bipolar products for many years, allowing us to respond quickly to customer requests and proceed with development. As a result, we reduced the number of input signal terminals, which led to a decrease in PKG pin count and PKG size, resulting in cost reduction and a smaller mounting area. Additionally, by adapting the circuit, we were able to improve image quality and accommodate changes in driving methods, thus meeting customer demands. [Effects] ■ Reduced the number of input signal terminals, leading to a decrease in PKG pin count and PKG size, resulting in cost reduction and a smaller mounting area. ■ By adapting the circuit, we were able to improve image quality and accommodate changes in driving methods, thus meeting customer demands. *For more details, please refer to the PDF document or feel free to contact us.

• Other semiconductors

This is a silicon photodiode compatible with the measurement of light power in the UV-C range (200–280nm). By adopting a unique package, we have achieved low cost. 【Features】 ■ Capable of detecting UV-C light ■ Compact surface mount package 3.5x3.0mm ■ Lead-free ■ Compatible with solder reflow ■ Can be combined with optical filters to receive light other than UV-C *For more details, please feel free to contact us.

• Transistor

The "CA0024AN" is an IC capable of switching between two video signals. It incorporates three circuits of a 2-input 1-output selector, making it suitable for switching RGB signals and component signals. By adopting a QFN-16PIN (3.0mm × 3.0mm) package, it allows for space-saving implementation, and it has a wide operating and storage temperature range, making it suitable for use in automotive AV equipment. 【Features】 ■ Incorporates three circuits of a 2-input 1-output selector ■ Power supply voltage: 5.0±0.5V (maximum rating 7.0V) ■ Wide operating temperature range: -40℃ to 85℃ ■ Wide bandwidth frequency characteristics: 100kHz to 20MHz 0dB (Typ.) ■ Package: QFN-16pin 3.0mm × 3.0mm 0.5mm pitch ■ Bias input *For more details, please refer to the PDF document or feel free to contact us.

• Dedicated IC

The "CA0023AN" is a video isolation amplifier designed to eliminate external noise when receiving video signals from external devices and to transmit them to internal circuits. With two built-in circuits and a compact package (SON-8p), it allows for circuit slimming and cost reduction. It guarantees a wide operating temperature range, making it suitable for interfacing video signals in automotive AV equipment. 【Features】 ■ Two built-in circuits ■ Wide operating temperature range: -40℃ to 85℃ ■ Common mode noise rejection ratio (CMRR): TYP -60dB ■ Wide bandwidth frequency characteristic: 30MHz flat ■ Compact package: SON-8pin 2.2mm × 2.2mm ■ Bias input *For more details, please refer to the PDF document or feel free to contact us.

• Dedicated IC

The "CA0013BM" is a BUS driver/receiver IC for cars. It is designed to connect the operation panel and components for data communication, and the logic input supports both 3.3V and 5V microcontroller outputs. The output is in open collector format, and by connecting a pull-up resistor, it can accommodate inputs from 3.3V and 5V microcontrollers. The BUS terminals are resistant to surge damage and are lead-free. 【Features】 ■ Wide operating voltage range for receiver, functioning within 0 to 4.5V ■ Built-in standby function: low power consumption (below 1μA) in standby mode ■ Built-in output protection circuit: operates when BUS+ and BUS- terminal voltage is ≧9V ■ Power supply voltage: +5V single supply operation ■ Package: 8PIN SOP *For more details, please refer to the PDF document or feel free to contact us.

• Dedicated IC

The product is a "quantum dot laser" using a GaAs substrate. It features low output fluctuations due to temperature, making it suitable for various applications. Additionally, we accept the fabrication of compound semiconductor wafers and quantum dot wafers using MBE equipment. Custom manufacturing is also available, so please feel free to consult with us. 【Wafer Fabrication Overview】 ■ Wafer Diameter: 2 inches ■ Usable Elements: Ga, In, Al, As, Sb, Si (n-type dopant), Be (p-type dopant) ■ Structural Examples: Quantum dots with double heterostructure, etc. *For more details, please refer to the PDF document or feel free to contact us.

• Wafer

The "CA0027AN" is an IC that supplies power to the GPS antenna and monitors the current to diagnose the connection status of the GPS antenna and output an alarm signal. The threshold for short detection current can be adjusted using an external resistor. Additionally, the limit current is determined in conjunction with this, allowing for flexible compatibility with various GPS antennas. 【Features】 ■ Adjustable threshold for short detection current ■ Flexible compatibility with various GPS antennas ■ Open collector output ■ Automotive compatible (AEC-Q100 Grade-2 compliant) *For more details, please refer to the PDF document or feel free to contact us.

• Dedicated IC

The "CA0022AN" is a watchdog timer IC that achieves low power consumption and compact packaging. It monitors the power supply voltage and system operation to prevent system crashes. The reset delay time can be set using an external capacitor at the CT terminal, and the watchdog timer function can be disabled via the INH terminal. Additionally, the operating temperature range is -40°C to +85°C (automotive compliant). 【Features】 ■ Low power consumption of 14μA (Typ.) ■ Operating temperature range of -40°C to +85°C (automotive compliant) ■ Comparator with hysteresis ■ Reset delay time can be set using an external capacitor at the CT terminal ■ Watchdog timer duration can be set using an external capacitor at the CTW terminal ■ Watchdog timer function can be disabled via the INH terminal *For more details, please refer to the PDF document or feel free to contact us.

• Dedicated IC

The "CPS303AT" is a light sensor that incorporates a photodiode with spectral sensitivity close to human visual sensitivity, along with a current amplification circuit and a digital conversion circuit on the same chip. It outputs detection results as a 16-bit digital value via the I2C interface. By adjusting the brightness of light sources such as displays and controlling ON/OFF based on the illuminance output, it enables improved visibility, extended lifespan of the light source, and reduced power consumption. 【Features】 ■ Spectral sensitivity characteristics close to human visual sensitivity ■ Output characteristics proportional to ambient light illuminance ■ Minimal output dependency on the light source ■ I2C interface compatible ■ Shutdown function via software sleep ■ Flexible integration, timing, and resolution settings ■ Compatible with solder reflow, lead-free, RoHS, and halogen-free standards *For more details, please refer to the PDF document or feel free to contact us.

• Sensors

The CPS295HW is an analog current output type illuminance sensor that combines a photodiode with spectral sensitivity close to visual sensitivity and a current amplification circuit. By adjusting the brightness of light sources such as displays and controlling ON/OFF based on the illuminance output, it is possible to improve display visibility, extend the lifespan of the light source, and reduce power consumption. Additionally, it adopts a high-temperature resistant package, supporting a wide operating temperature range (-40°C to 105°C) compared to conventional products. 【Features】 ■ Wide operating temperature range (-40°C to 105°C) ■ Spectral sensitivity characteristics close to visual sensitivity ■ Current output proportional to ambient light illuminance ■ Minimal output dependency on the light source ■ Compatible with solder reflow and halogen-free *For more details, please refer to the PDF materials or feel free to contact us.

• Sensors

The CPS298AL is an RGB color sensor that has sensitivity to Red (R), Green (G), and Blue (B), outputting detection results as 16-bit digital values for each color. With a 4×8 ARRAY configuration, it can uniformly receive RGB light. Adopting a compact and thin COB package (2.4mm×2.0mm×0.95mm), it is suitable for small modules. 【Features】 ■ Supports I2C interface ■ Continuous measurement of Red/Green/Blue/Infrared in sequence (receiving mode) ■ Built-in light-shielding receiving section allows output of only dark current components (dark mode) ■ Sensitivity adjustment possible by setting the integration time (1 to 65535) ■ Compact, thin package, surface mount COB-8PIN ■ Built-in infrared cut filter *For more details, please refer to the PDF document or feel free to contact us.

• Sensors

The CPS289AT is an RGB color sensor that features three photodiodes, each with sensitivity to Red (R), Green (G), and Blue (B), and has independent gain control functions for each R, G, and B channel. It can convert RGB light into an analog voltage output. With a dot-type 12×12 array, it can uniformly receive RGB light. The adoption of a compact and thin COB package (3.5mm × 3mm × 0.7mm) makes it suitable for small modules. 【Features】 ■ Contains three photodiodes, each with sensitivity ■ Built-in independent gain control functions for each R, G, and B channel ■ Capable of converting RGB light into an analog voltage output ■ Can uniformly receive RGB light ■ Suitable for small modules *For more details, please refer to the PDF document or feel free to contact us.

• Sensors

The "CPF274ALK" is an OEIC developed for front monitoring to control the laser power of pickups for BD/DVD/CD with a single IC. It features a serial interface, allowing for the selection of five gain modes (coarse gain adjustment) and gain adjustment of ±4.7dB (fine gain adjustment). Additionally, it eliminates the need for variable resistors for gain adjustment, reducing the number of components. With a high-speed amplifier integrated into the PIN photodiode, it achieves low output impedance and stable output. 【Features】 ■ Equipped with a serial interface ■ Capable of selecting five gain modes and adjusting gain by ±4.7dB ■ Reduces the number of components ■ High-speed amplifier integrated into the PIN photodiode ■ Achieves low and stable output *For more details, please refer to the PDF document or feel free to contact us.

• Dedicated IC

The CM0064AB is a compact terrestrial digital demodulation IC that integrates an RF tuner and ISDB-T demodulation processing into one package. It supports terrestrial digital television broadcasting (ISDB-T), terrestrial digital audio broadcasting (ISDB-Tsb), and mobile multimedia broadcasting (ISDB-Tmm). By using this product, it is possible to build a cost-effective and high-performance ISDB-T reception system. 【Features】 - Supports ISDB-T, ISDB-Tsb, and ISDB-Tmm standards - Equipped with a high-performance RF tuner - Reception bands: VHF-Low, VHF-High, UHF - Supports 4-diversity - Equipped with 2 TS outputs *For more details, please refer to the PDF document or feel free to contact us.

• Dedicated IC

The "CA0020AN" achieves low power consumption through a high-voltage CMOS process and is an IC suitable for power monitoring of batteries and other sources. It monitors multiple power supply voltages inside vehicles with a single chip in automotive AV equipment. Additionally, the adoption of a compact package makes it suitable for miniaturization and high-density circuit boards. 【Features】 ■ Built-in 6-channel power monitoring ■ Comparator with hysteresis: 5 channels, comparator without hysteresis: 1 channel ■ N-channel open-drain output ■ Compact, thin, bottom-mounted package (Plating Lead Package: 3.65mm×2.7mm×t:0.58mm 14PIN) ■ Halogen-free, compatible with solder reflow *For more details, please refer to the PDF document or feel free to contact us.

• Dedicated IC

The "CPS295HT" is an analog current output type illuminance sensor that combines a photodiode with spectral sensitivity close to visual sensitivity and a current amplification circuit. By adjusting the brightness of light sources such as displays according to the illuminance output and performing ON/OFF control, it enables improved visibility of displays, extended lifespan of light sources, and reduced power consumption. It is suitable for applications such as LCD TVs, laptops, and car navigation systems. 【Features】 ■ Compact package (1.8mm × 1.4mm × 0.58mm) ■ Spectral sensitivity characteristics close to visual sensitivity ■ Current output proportional to ambient light illuminance ■ Minimal output dependency on light sources ■ Compatible with solder reflow and halogen-free *For more details, please refer to the PDF document or feel free to contact us.

• Sensors

The "CPS333AT" is an analog current output type RGB color sensor equipped with three photodiodes, each having sensitivity to Red (R), Green (G), and Blue (B). With a dot-type 12×12 array, it can uniformly receive RGB light. Its compact and thin COB package (3.5mm×3.0mm×0.7mm) makes it suitable for small modules. 【Features】 ■ RGB 3ch photodiode analog current output ■ Light receiving element size: 139mm/□ 144 divisions ■ Compact and thin package: 3.5mm×3.0mm×0.7mm GCOB-12PIN ■ IR cut glass included ■ Compatible with solder reflow *For more details, please refer to the PDF materials or feel free to contact us.

• Sensors

The "CPS253AL/BL" is a digital output type photo IC that integrates a photodiode, amplification circuit, Schmitt trigger circuit, and output transistor into a single chip. It exhibits minimal sensitivity variation due to power supply changes across a wide operating voltage range. The output format is open collector, with "CPS253AL" outputting a high level when light is input, and "CPS253BL" outputting a low level when light is input. 【Features】 ■ Compact transparent COB package (2.0mm × 2.0mm × 1.0mm, 4 pins, no lens) ■ High-speed response ■ Wide operating voltage range of 3.0V to 13.2V ■ Threshold irradiance independent of supply voltage ■ Digital output (open collector) *For more details, please refer to the PDF document or feel free to contact us.

• Sensors

The "CP0174AL" is a photodiode capable of measuring light intensity from visible light to near-infrared light (400nm to 1000nm), including lasers and LEDs. The size of the light receiving area is 0.7mm x 0.7mm, and it is halogen-free compliant. With the adoption of a compact COB-2PIN package (2.2mm x 1.22mm), it is suitable for integration into small optical units such as pico projectors. 【Features】 ■ Sensitivity: 0.26A/W @ 405nm, 0.44A/W @ 700nm ■ Light receiving area size: 0.7mm x 0.7mm ■ Compact, thin package: 2.2mm x 1.22mm x 1.0mm COB-2PIN ■ Compatible with solder reflow ■ Lead-free compliant, RoHS compliant *For more details, please refer to the PDF document or feel free to contact us.

• Sensors

The "CPF233AL" is an OEIC developed for controlling laser power across three wavelengths for front monitoring. It features a serial interface, allowing for the selection of four gain modes (coarse gain adjustment) and gain adjustment of ±4.7dB (fine gain adjustment). With the adoption of a COB-8PIN (2.4mm×2mm) package, it is suitable for compact and slim pickups. 【Specifications】 ■ Package: 2.4mm×2mm LCOB-8 pin ■ Wavelength compatibility: 405 nm, 650 nm, 780 nm ■ Frequency characteristics: 160[MHz] ■ Standby function: Yes ■ Built-in amplifier characteristics: Tr/Tf: 3[ns] *For more details, please contact us.

• Sensors