Renesas M38039FFLKP#U0

Overview

M38039FFLKP#U0 from Renesas Electronics is a Flash-memory-based 8-bit CMOS microcomputer in the 3803 (Spec.L) group, built on the 740 family core. It integrates 60 KB Flash ROM, 2048 bytes RAM, 16-channel 10-bit A/D converter, dual 8-bit D/A converters, 56 I/O ports with LED drive capability, and multiple timers/serial interfaces - enabling analog-intensive control in household appliances and office automation systems.

For engineers reviewing the M38039FFLKP#U0 datasheet, M38039FFLKP#U0 pinout, M38039FFLKP#U0 application, or M38039FFLKP#U0 equivalent, this page delivers verified specifications, LQFP-64 package mapping, functional pin roles, real-world use cases, and two validated alternative parts for embedded control design.

Technical Context

The M38039FFLKP#U0 implements the standard 740-family instruction set (71 instructions), with minimum execution time of 0.24 µs at 16.8 MHz. Its dual clock-generating circuits support external ceramic resonators or quartz crystals, enabling flexible system timing across high/middle/low-speed modes.

It features three serial interfaces (two UART/clock-synchronized, one clock-synchronized), an 8-bit PWM channel with prescaler, watchdog timer, and software-configurable pull-up resistors on all I/O ports - all operating within −20 to +85 °C under 2.7–5.5 V supply.

Key Specifications

Pinout & Package

Package: PLQP0064GA-A (64-pin, 14 × 14 mm, 0.8 mm pitch LQFP).

Key Features

Applications

Equivalent & Alternatives

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

Compared with M38039FFLKP#U0, the HP variant offers identical functionality in a more compact LQFP, while the MFLKP#U0 replaces Flash with Mask ROM - trading field update capability for lower unit cost and guaranteed firmware immutability.

Availability

M38039FFLKP#U0 is available at Aetrix Electronics and suitable for home appliance control, office equipment motor management, and industrial panel meter interfaces requiring stable component supply across extended product lifecycles.

Supply support for M38039FFLKP#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 specializing in microcontrollers, analog, and power solutions for industrial, automotive, and consumer markets.

The 3803 (Spec.L) group was designed specifically for cost-sensitive, analog-intensive embedded control in household and office automation - emphasizing integrated A/D, D/A, LED drive, and Flash flexibility in a single 8-bit MCU.

FAQ

What is the maximum operating frequency of the M38039FFLKP#U0?

The M38039FFLKP#U0 supports a maximum oscillation frequency of 16.8 MHz in high-speed mode. At this frequency, its minimum instruction execution time is 0.24 µs. The device also operates reliably at lower frequencies including 12.5 MHz, 8.4 MHz, 4.2 MHz, 2.1 MHz, and 32 kHz - enabling dynamic power scaling across application states. This range is fully supported in both high- and middle-speed modes.

Does the M38039FFLKP#U0 support in-system programming?

Yes, the M38039FFLKP#U0 supports in-system programming via its on-chip Flash memory. Programming is performed byte-by-byte, and erasure occurs in blocks. The device requires no external high-voltage supply - VCC (2.7–5.5 V) serves as the program/erase voltage. Up to 100 program/erase cycles are rated, making it suitable for development iterations and field firmware updates.

What are the key differences between the M38039FFLKP#U0 and M38039MFLKP#U0?

The M38039FFLKP#U0 uses Flash memory (60 KB), enabling field reprogramming and block erasure, while the M38039MFLKP#U0 uses Mask ROM with identical size and peripherals but fixed firmware. Both share the same 64-pin LQFP-14×14 package, I/O count, A/D/D/A specs, and operating voltage range. The Flash version consumes 27.5 mW at 16.8 MHz vs. 40 mW for the Mask ROM version.

Can the M38039FFLKP#U0 drive LEDs directly without external transistors?

Yes, the M38039FFLKP#U0 includes eight dedicated LED drive pins (P20–P27) capable of sinking up to 15 mA average current and 30 mA peak current per pin, with a total sink capacity of 90 mA. This allows direct connection to common-anode LED displays or discrete indicator LEDs without external driver circuitry - simplifying BOM and PCB layout in appliance UIs.

Which serial communication protocols does the M38039FFLKP#U0 support?

The M38039FFLKP#U0 supports three independent serial interfaces: two 8-bit channels configurable as UART or clock-synchronized (SI/O1 and SI/O2), and one additional 8-bit clock-synchronized channel (SI/O3). These support full-duplex asynchronous communication, synchronous master/slave transfers, and hardware handshaking (SRDY1/SRDY2/SRDY3), enabling robust connectivity with sensors, displays, and other MCUs.