Renesas M38239GCHP#U0

Overview

M38239GCHP#U0 from Renesas Electronics is an 8-bit CMOS microcomputer based on the 740 family core, featuring integrated LCD drive control (4 common, 32 segment outputs), 10-bit 8-channel A/D converter, UART/clock-synchronized serial interface, and 8-bit × 3 / 16-bit × 2 timers. It operates from 1.8 V to 5.5 V across multiple clock modes and targets embedded consumer displays requiring low-power, integrated timing and analog sensing.

For engineers reviewing the M38239GCHP#U0 datasheet, M38239GCHP#U0 pinout, M38239GCHP#U0 application, or M38239GCHP#U0 equivalent, key selection criteria include its 80-pin LQFP package, QzROM-based 49,152-byte program memory, 2048-byte RAM (including LCD display RAM), and support for 1/2–1/3 bias and 1/2–1/4 duty LCD drive configurations.

Technical Context

The M38239GCHP#U0 implements a 740-family CPU with 71 basic instructions and a minimum instruction execution time of 0.4 µs at 10 MHz in high-speed mode. Its clock system integrates built-in feedback resistors for both main (XIN/XOUT) and sub-clock (XCIN/XCOUT) circuits, supporting external ceramic resonators or quartz crystals.

It delivers 17 interrupt sources with 16 vectors-including key-on wake-up inputs (KW0–KW7)-and combines programmable I/O (49 pins) with dedicated analog functions: 8 ADC input channels (AN0–AN7), real-time port (RTP0/RTP1), and timer-triggered A/D conversion (ADT). Power management includes low-speed modes consuming as little as 18 µW at 32 kHz sub-clock operation.

Key Specifications

Pinout & Package

Package: PLQP0080KB-A - 80-pin plastic-molded LQFP (0.5 mm pitch).

Key Features

Applications

Equivalent & Alternatives

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

Compared with M38239GCHP#U0, the M38239GCFP#U0 offers identical functionality in a more manufacturable QFP package, while the M38238G8HP#U0 reduces memory capacity to lower unit cost-both retain full pin and software compatibility within the 3823 group.

Availability

M38239GCHP#U0 is available at Aetrix Electronics and suitable for smart remote controls, portable audio displays, home appliance keypads, and industrial panel meters requiring stable component supply over extended production lifecycles.

Supply support for M38239GCHP#U0 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 leader delivering microcontrollers, analog, power, and SoC solutions for automotive, industrial, and consumer markets.

The 3823 Group was designed specifically for cost-sensitive, low-power embedded applications with integrated LCD and analog interfaces-targeting consumer electronics, home appliances, and portable instrumentation.

FAQ

What is the maximum operating frequency supported by the M38239GCHP#U0?

The M38239GCHP#U0 supports a maximum oscillation frequency of 10 MHz in high-speed mode, achieving a minimum instruction execution time of 0.4 µs. This applies when using the main clock (XIN/XOUT) with frequency/2 division. Lower division ratios (frequency/4, /8) allow operation down to 1.8 V but reduce maximum clock speed accordingly.

Does the M38239GCHP#U0 support external crystal oscillators on both main and sub-clock inputs?

Yes, the M38239GCHP#U0 supports external quartz-crystal oscillators on both XIN/XOUT (main clock) and XCIN/XCOUT (sub-clock) pins. The main clock accepts crystals up to 10 MHz; the sub-clock is designed exclusively for 32.768 kHz crystals and does not support external clock sources or ceramic resonators.

How many segment and common lines does the LCD driver in the M38239GCHP#U0 support?

The M38239GCHP#U0 LCD driver supports up to 32 segment outputs and 4 common outputs (COM0–COM3). It operates with 1/2 or 1/3 bias and 1/2, 1/3, or 1/4 duty configurations. COM2 and COM3 are inactive in 1/2-duty mode; COM3 is inactive in 1/3-duty mode.

What is the purpose of the KW0–KW7 pins on the M38239GCHP#U0?

The KW0–KW7 pins on the M38239GCHP#U0 are dedicated key-on wake-up inputs that generate interrupts to resume CPU operation from low-power sleep modes. Each pin can independently trigger wake-up, enabling responsive keypad interfaces without continuous polling-critical for battery-powered devices like remote controls.

Can the M38239GCHP#U0 operate from a 1.8 V supply, and under what conditions?

Yes, the M38239GCHP#U0 supports 1.8 V operation in frequency/4, frequency/8, and low-speed modes-provided the main clock frequency is ≤5 MHz. This enables ultra-low-power operation in battery-powered applications, with typical dissipation dropping to 18 µW when using the 32.768 kHz sub-clock and 2.5 V supply.