Renesas HD4074899HV

Overview

HD4074899HV from Renesas Electronics is a 4-bit ZTAT™ single-chip microcomputer with on-chip 16,384-word PROM, 1,344-digit RAM, 10-bit × 6-channel A/D converter, and integrated LCD controller/driver (32 segments × 4 commons). It operates from 1.8 V to 5.5 V, features 46 I/O pins (including 4 large-current source and 8 sink pins), and supports low-power modes including stop, watch, standby, and subactive modes for battery-powered display control in pagers, remote controllers, and home appliances.

For engineers reviewing the HD4074899HV datasheet, HD4074899HV pinout, HD4074899HV application, or HD4074899HV equivalent, key selection criteria include its ZTAT™ PROM architecture for rapid prototyping, 10-bit ADC resolution, 32×4 LCD drive capability, real-time clock support via 32.768 kHz sub-oscillator, and compatibility with ceramic or crystal main oscillators.

Technical Context

The HD4074899HV implements a 4-bit CPU core with subroutine stack depth up to 16 levels and interrupt handling (3 external, 6 internal sources). Its timing subsystem includes one 16-bit timer (configurable as two 8-bit timers), two 8-bit timers, an 8-bit input capture circuit, and two timer outputs supporting PWM generation.

It integrates a clock-synchronous 8-bit serial interface, event counter inputs with edge-programmable sensitivity, and module-level power control enabling selective shutdown of timers, serial interface, and A/D converter during low-power operation - all coordinated through software-controlled system clock division (1/4 or 1/32).

Key Specifications

Pinout & Package

HD4074899HV is packaged in an 80-pin plastic QFP (FP-80A) with 0.65 mm lead pitch, suitable for surface-mount assembly and thermal management in compact consumer electronics.

Key Features

Applications

Equivalent & Alternatives

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

Compared with HD4074889 and HD404899, the HD4074899HV provides higher ADC resolution for precision analog sensing while retaining ZTAT™ flexibility - making it optimal for mid-volume, feature-rich consumer devices needing both programmability and measurement fidelity.

Availability

HD4074899HV is available at Aetrix Electronics and suitable for remote controls, portable medical monitors, home appliance keypads, and pager display modules requiring stable component supply across extended product lifecycles.

Supply support for HD4074899HV 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, power, and SoC solutions for automotive, industrial, and consumer markets.

The HD404889/HD404899 series was designed for ultra-low-power, cost-sensitive display-centric applications - integrating LCD drivers, ADCs, and real-time clocks to minimize external components in battery-operated handheld devices.

FAQ

What is the maximum operating frequency supported by the HD4074899HV?

The HD4074899HV achieves a minimum instruction execution time of 0.89 µs at an oscillator frequency of 4.5 MHz, confirming its rated maximum operational clock speed is 4.5 MHz. This frequency is compatible with standard ceramic resonators or crystals in the 1–10 MHz range connected to OSC1/OSC2 pins, and is sufficient for real-time control tasks in remote controls and display panels.

Does the HD4074899HV support external memory expansion?

No, the HD4074899HV does not support external memory expansion. It is a single-chip microcomputer with fixed on-chip resources: 16,384-word PROM and 1,344-digit RAM. All program code and runtime variables must reside within these integrated memory blocks - a design choice that simplifies PCB layout and improves reliability in space-constrained applications like pagers and remotes.

How many LCD segments can the HD4074899HV drive, and what is the common configuration?

The HD4074899HV drives up to 32 segments with 4 commons (32 × 4), supporting static or multiplexed LCD displays. Its SEG1–SEG32 and COM1–COM4 pins provide direct connection to segment electrodes and backplane lines, and internal voltage dividers generate V1–V3 bias voltages - enabling full display control without external LCD bias ICs.

What are the wakeup sources from stop mode on the HD4074899HV?

The HD4074899HV supports wakeup from stop mode via four dedicated input pins: R00/WU0, R01/WU1, R02/WU2, and R03/WU3 (Pins 29–32). These pins detect rising or falling edges per configuration, allowing immediate MCU resumption for user input (e.g., button press) or external event detection without continuous polling.

Is the HD4074899HV RoHS compliant and qualified for industrial temperature range?

Yes, the HD4074899HV is RoHS compliant and specified for operation from –20 °C to +75 °C, meeting industrial-grade environmental requirements. This rating is confirmed in the official Renesas datasheet (Rev. 6.00, Sep. 2003) and aligns with Renesas' "Standard" quality grade, making it suitable for office equipment, home appliances, and industrial robots per their quality classification policy.