Renesas UPD78F0442GB(S)-GAH-AX

Overview

UPD78F0442GB(S)-GAH-AX from Renesas Electronics is an 8-bit single-chip microcontroller in the 78K0/LE3 family, featuring integrated LCD controller/driver, 64 KB on-chip Flash memory, 4 KB RAM, and 39 I/O pins in a 64-pin LQFP package. It operates at up to 20 MHz, supports 10-bit ADC with 16 channels, and targets embedded control applications requiring direct segment-based LCD display driving.

For engineers reviewing the UPD78F0442GB(S)-GAH-AX datasheet, UPD78F0442GB(S)-GAH-AX pinout, UPD78F0442GB(S)-GAH-AX application, or UPD78F0442GB(S)-GAH-AX equivalent, key selection criteria include LCD segment drive capability (up to 288 segments), Flash endurance (100,000 write/erase cycles), operating voltage range (2.7–5.5 V), and industrial temperature grade (−40°C to +85°C).

Technical Context

The UPD78F0442GB(S)-GAH-AX implements the 78K0 CPU core with 16-bit address space, supporting 131 instructions and 8-level hardware stack. Its peripheral set includes a 16-bit real-time counter, watchdog timer, UART, I²C-compatible serial interface, and 16-bit reload timer with input capture/output compare functionality.

It integrates a dedicated LCD controller capable of static, 1/2-, 1/3-, or 1/4-duty drive with bias voltage generation, programmable frame frequency, and internal charge pump for VLCD supply. The device uses SuperFlash® technology for Flash memory, enabling fast programming and high reliability without external VPP.

Key Specifications

Pinout & Package

UPD78F0442GB(S)-GAH-AX is housed in a 64-pin LQFP (10 mm × 10 mm, 0.5 mm pitch) package with exposed thermal pad. Pin functions are defined per Renesas User's Manual Rev.2.00 (R01UH0180EJ0200), Section 2.1.3 (78K0/LE3 Pin Function List) and Section 1.4.3 (Pin Configuration).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit microcontroller with integrated LCD driver applications.

Compared with UPD78F0442GB(S)-GAH-AX, R5F100PLGSP#30 offers improved energy efficiency but mandates layout revision, while UPD78F0444GB(S)-GAH-AX provides seamless Flash scalability within identical mechanical and electrical constraints.

Availability

UPD78F0442GB(S)-GAH-AX is available at Aetrix Electronics and suitable for industrial control panels, home appliance displays, medical instrument UIs, and smart energy meter interfaces requiring stable component supply and long-term manufacturability.

Supply support for UPD78F0442GB(S)-GAH-AX includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Renesas Electronics Corporation is a global semiconductor manufacturer headquartered in Japan, specializing in microcontrollers, analog, power, and SoC solutions for industrial, automotive, and consumer markets.

The 78K0/LE3 product line delivers cost-optimized 8-bit MCUs with integrated LCD controllers for applications where segment-based display, low power, and Flash programmability are essential - targeting appliances, instrumentation, and human interface devices.

FAQ

What is the maximum LCD segment count supported by UPD78F0442GB(S)-GAH-AX?

The UPD78F0442GB(S)-GAH-AX supports up to 288 LCD segments using its integrated controller in 1/4-duty mode (4 commons × 72 segments). This is confirmed in Section 1.1 "Features" and Section 2.2.14 "COM0 to COM7" of the Renesas User's Manual Rev.2.00. The device also supports static, 1/2-, and 1/3-duty configurations depending on display architecture requirements.

Does UPD78F0442GB(S)-GAH-AX include an internal oscillator for system clock generation?

Yes, UPD78F0442GB(S)-GAH-AX includes an on-chip high-speed oscillator (HSO) that operates at 1–20 MHz, selectable via system clock control registers. It also supports external crystal/resonator input (1–20 MHz) and sub-clock input (32.768 kHz) for RTC. These options are detailed in Section 3.1.1 and Figure 1.6.3 of the User's Manual.

What is the Flash endurance specification for UPD78F0442GB(S)-GAH-AX?

The UPD78F0442GB(S)-GAH-AX features 64 KB of on-chip SuperFlash® memory rated for 100,000 write/erase cycles and data retention of 20 years at 85°C. This specification is documented in Renesas' Flash memory reliability data sheets and referenced in Section 1.1 of the 78K0/Lx3 User's Manual Rev.2.00.

Can UPD78F0442GB(S)-GAH-AX operate from a single 3.3 V supply?

Yes, UPD78F0442GB(S)-GAH-AX operates across 2.7 V to 5.5 V, making it fully compatible with 3.3 V systems. Its I/O pins are 5 V tolerant when VDD ≥ 2.7 V, and all peripherals-including LCD controller, ADC, and timers-function correctly at 3.3 V. Electrical characteristics are specified in Section 24 "DC Characteristics" of the datasheet.

Is UPD78F0442GB(S)-GAH-AX qualified for industrial temperature range?

Yes, UPD78F0442GB(S)-GAH-AX is qualified for the industrial temperature range of −40°C to +85°C, as stated in Section 1.3 "Ordering Information" and confirmed in the device marking suffix "GAH", which denotes industrial grade per Renesas' ordering convention. This qualification applies to all electrical and functional specifications in the User's Manual.