Renesas M34514E8FP#U1

Overview

M34514E8FP#U1 from Renesas Technology Corp. is a 4-bit single-chip CMOS microcomputer with an integrated 4500-series CPU core, 8192-word × 10-bit One Time PROM, 384-word × 4-bit RAM, 10-bit 8-channel A-D converter, four 8-bit reload timers, serial I/O, and dual voltage comparators. It operates from 2.0 V to 5.5 V and supports ceramic resonator-based clock generation for embedded control in consumer appliances.

For engineers reviewing the M34514E8FP#U1 datasheet, M34514E8FP#U1 pinout, M34514E8FP#U1 application, or M34514E8FP#U1 equivalent, key selection criteria include its 42-pin SSOP (42P2R-A) package, 8-channel analog input capability (AIN0–AIN7), P5 port's CMOS output structure, and support for RAM back-up mode with key-on wakeup on INT0/INT1.

Technical Context

The M34514E8FP#U1 implements the 4500-series 4-bit CPU architecture with ALU, 4-bit register A/B, 8-bit register E, 3-bit register D, 8-level stack (SK), and 1-level interrupt stack (SDP). Its instruction set executes in minimum 0.75 µs at 4.0 MHz in high-speed mode.

It integrates system-level peripherals including a built-in voltage drop detection circuit (enabled via VDCE), watchdog timer (16-bit), serial I/O (8-bit, synchronous), and clock generation circuit compatible with ceramic resonators (XIN/XOUT). The A-D converter uses successive approximation with 10-bit resolution across eight dedicated input channels.

Key Specifications

Pinout & Package

Package: 42-pin plastic molded SSOP (42P2R-A), operating temperature range –20 °C to +85 °C.

Key Features

Applications

Equivalent & Alternatives

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

Compared with M34514M8FP#U1, the M34514E8FP#U1 offers field-programmable firmware via OTP while retaining identical timing, I/O, and analog capabilities; versus UPD78F0503GC-GAH-AX, it delivers lower power, smaller die size, and simpler development for deterministic 4-bit control tasks.

Availability

M34514E8FP#U1 is available at Aetrix Electronics and suitable for home appliance control, remote interface design, office equipment sensor hubs, and small-scale industrial monitors requiring stable component supply across extended product lifecycles.

Supply support for M34514E8FP#U1 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 Technology Corp. was formed in 2003 through the merger of Hitachi and Mitsubishi Electric's semiconductor operations, focusing on microcontrollers, analog, logic, and memory solutions.

The M34514E8FP#U1 belongs to the 4513/4514 Group - a family of 4-bit CMOS microcomputers designed specifically for cost-sensitive, low-power embedded control in consumer and industrial appliances.

FAQ

What is the maximum operating frequency supported by the M34514E8FP#U1?

The M34514E8FP#U1 supports up to 4.2 MHz oscillation frequency in high-speed mode with VDD ≥ 4.0 V, yielding a minimum instruction execution time of 0.75 µs. At lower supply voltages (2.5 V–3.0 V), the maximum safe frequency drops to 2.0 MHz or 1.5 MHz depending on ROM type, per the electrical characteristics table.

Does the M34514E8FP#U1 support in-circuit programming or debugging?

No, the M34514E8FP#U1 contains One Time PROM and lacks on-chip debug interfaces, JTAG, or ISP capability. Firmware must be programmed prior to soldering using a dedicated PROM programmer. Debugging is performed via serial I/O logging or external logic analyzers monitoring port activity.

How many analog input channels does the M34514E8FP#U1 have, and what is their resolution?

The M34514E8FP#U1 has eight analog input channels (AIN0–AIN7), each supporting 10-bit resolution via successive approximation A-D conversion. Channels AIN0–AIN3 double as voltage comparator inputs (CMP0±/CMP1±), while AIN4–AIN7 are exclusively analog and mapped to port P4 pins.

Can the M34514E8FP#U1 operate from a single 3.3 V supply?

Yes - the M34514E8FP#U1 operates from 2.5 V to 5.5 V in high-speed mode and 2.0 V to 5.5 V in middle-speed mode. At 3.3 V, it runs reliably at up to 3.0 MHz (middle-speed) or 2.0 MHz (high-speed), meeting common 3.3 V system requirements without level-shifting.

What is the function of the VDCE and CNVSS pins on the M34514E8FP#U1?

VDCE enables the on-chip voltage drop detection circuit: applying "H" activates monitoring, "L" disables it. CNVSS is the dedicated ground reference for that circuit and must be tied to VSS; leaving it floating or misconnected disables brown-out protection entirely. Both pins are required for reliable supply supervision.