Renesas M3455AG8FP#U0

Overview

M3455AG8FP#U0 from Renesas Electronics is a 4-bit CMOS single-chip microcomputer with 8192-word QzROM, 512-word RAM, integrated LCD controller (32 segments × 4 commons), and three timers (two 8-bit, one 16-bit). It operates from 1.8 to 5.5 V, achieves 0.5 µs minimum instruction execution at 6 MHz, and targets ultra-low-power remote control transmitters.

For engineers reviewing the M3455AG8FP#U0 datasheet, M3455AG8FP#U0 pinout, M3455AG8FP#U0 application, or M3455AG8FP#U0 equivalent, key selection considerations include its PLQP0052JA-A 52-pin LQFP package, dual-clock support (ceramic resonator + 32.768 kHz quartz), voltage drop detection (reset at 1.7 V), and 24-key-on wakeup I/O pins for battery-powered IR remotes.

Technical Context

The M3455AG8FP#U0 implements the 4500 Series CPU core with 138 basic instructions and supports four clock sources: high-speed on-chip oscillator, ceramic-resonator-based main clock (XIN/XOUT), quartz-based sub-clock (XCIN/XCOUT), and low-speed on-chip oscillator. System clock selection is controlled via the 4-bit MR register with 16 configurable modes.

Its peripheral set includes Timer 1 (8-bit with reload and carrier wave auto-control), Timer 2 (8-bit with two reload registers and carrier wave generation), Timer 3 (16-bit fixed-division clock counter), and Timer LC (4-bit LCD clock generator). The LCD controller supports 1/2 or 1/3 bias and 2–4 duty drive with internal resistor options (r = 100 kΩ typical).

Key Specifications

Pinout & Package

Package: 52-pin plastic LQFP (PLQP0052JA-A), 10 mm × 10 mm, 0.65 mm pitch, exposed pad not specified.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 4-bit microcontroller applications.

Compared with RL78/L12 and HD6417028, the M3455AG8FP#U0 delivers optimal cost-performance balance for fixed-function IR remotes by integrating LCD drive, key-scan, and low-power timing in a single 52-pin LQFP-eliminating external drivers while retaining proven 4-bit efficiency and qualification for consumer temperature ranges.

Availability

M3455AG8FP#U0 is available at Aetrix Electronics and suitable for IR remote control transmitters, low-power consumer remotes, industrial remote panels, and appliance control keypads requiring stable component supply and long-term lifecycle support.

Supply support for M3455AG8FP#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 formed in 2010 through the merger of NEC Electronics and Renesas Technology, specializing in microcontrollers, analog, and power solutions.

The 455A Group microcontrollers, including M3455AG8FP#U0, were designed specifically for ultra-low-power, cost-sensitive remote control applications with integrated LCD and key-scan functionality.

FAQ

What is the maximum operating frequency supported by the M3455AG8FP#U0?

The M3455AG8FP#U0 achieves a minimum instruction execution time of 0.5 µs when operating at 6 MHz oscillation frequency in high-speed through-mode. Its system clock can be derived from multiple sources-including an external 4–6 MHz ceramic resonator (XIN/XOUT), a 32.768 kHz quartz crystal (XCIN/XCOUT), or internal high/low-speed oscillators-with configurable division ratios via the MR register. The 6 MHz limit applies specifically to the external main clock path.

Does the M3455AG8FP#U0 support external memory expansion?

No, the M3455AG8FP#U0 does not support external memory expansion. It integrates 8192 words × 10-bit QzROM and 512 words × 4-bit RAM (including 32 words dedicated to LCD display RAM) on-die. All program execution and data storage occur within this fixed internal memory map, consistent with its design as a self-contained 4-bit microcontroller for compact remote control applications.

How many LCD segments and commons can the M3455AG8FP#U0 drive directly?

The M3455AG8FP#U0 drives up to 32 segment outputs (SEG0–SEG31) and 4 common outputs (COM0–COM3) directly. It supports 1/2-bias (using COM0/COM1), 1/3-bias (COM0–COM2), or 1/4-bias (COM0–COM3) configurations with 2-, 3-, or 4-duty drive. Internal resistors (r = 100 kΩ typical) enable simple bias network implementation without external components.

Can the M3455AG8FP#U0 operate from a single 1.8 V supply?

Yes, the M3455AG8FP#U0 operates from 1.8 to 5.5 V, and full functionality-including 0.5 µs instruction execution-is guaranteed at 1.8 V when using appropriate clock sources (e.g., low-speed on-chip oscillator or 32.768 kHz sub-clock). At 1.8 V, active current drops to ~0.15 mA (typ.), making it suitable for single-cell lithium or NiMH battery operation in space-constrained remotes.

What packaging and RoHS compliance status does the M3455AG8FP#U0 have?

The M3455AG8FP#U0 is supplied in a 52-pin plastic LQFP package (PLQP0052JA-A, 10 mm × 10 mm, 0.65 mm pitch) and complies with the EU RoHS Directive. Renesas confirms environmental compatibility per applicable regulations; no lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE substances exceed RoHS threshold limits. Full compliance documentation is available through Renesas sales offices.