Renesas HD6473837H

Overview

HD6473837H from Renesas Electronics is a 16-bit single-chip microcontroller in the H8/3834 Series, featuring an H8/300L CPU core, on-chip LCD controller/driver, 14-bit PWM, three-channel serial interface (UART/CSI), and 8-channel 10-bit A/D converter. It operates at up to 16 MHz with 64 KB on-chip ROM and 2 KB RAM, targeting embedded control systems with integrated display.

For engineers reviewing the HD6473837H datasheet, HD6473837H pinout, HD6473837H application, or HD6473837H equivalent, key selection criteria include its LCD driver capability, low-power sleep/standby modes, and compatibility with H8/300L instruction set for legacy code reuse in industrial HMI and appliance control designs.

Technical Context

The HD6473837H implements the H8/300L CPU architecture with full instruction set compatibility to the H8/300, supporting 16-bit data paths and 24-bit addressing. It integrates dedicated peripheral modules including a programmable LCD segment driver (up to 128 segments), five timer units (one 16-bit free-run, two 16-bit input capture/output compare, one 8-bit prescaler, one watchdog), and dual clock domains (main system clock and subclock).

Its power management includes six operational modes - Active, Subactive, Sleep, Standby, Watch, and Subsleep - with wake-up sources from external interrupts, internal timers, or RTC events. The device supports PROM programming via dedicated mode pins and uses standard CMOS process technology with 5 V operation.

Key Specifications

Pinout & Package

HD6473837H is housed in a 100-pin PQFP (Plastic Quad Flat Package) with 0.5 mm pitch, compliant with JEDEC MS-026. Pin functions are defined per the H8/3834 Series Hardware Manual Rev.5.0 (2003.05), Section 1.3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with HD64F3837 and HD6433837, the HD6473837H provides identical peripheral functionality and pin compatibility but targets long-lifecycle, high-reliability production with mask-programmed ROM - offering lower unit cost and guaranteed firmware immutability in sealed consumer devices.

Availability

HD6473837H is available at Aetrix Electronics and suitable for home appliance control, industrial HMI panels, portable medical devices, and smart energy meters requiring stable component supply across extended product lifecycles.

Supply support for HD6473837H 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 industrial, automotive, and consumer markets.

The H8/3834 Series, including HD6473837H, was designed for cost-sensitive, display-integrated embedded systems such as appliances and instrumentation - emphasizing integrated LCD driving, low-power operation, and H8/300L software compatibility.

FAQ

What is the maximum operating frequency of the HD6473837H?

The HD6473837H supports a maximum system clock frequency of 16 MHz, achieved using an external crystal (1–16 MHz) connected to XTAL1/XTAL2 or an external clock source. This frequency enables deterministic real-time execution of control algorithms and LCD refresh cycles without external acceleration.

Does the HD6473837H include an integrated LCD driver?

Yes, the HD6473837H integrates a segment-type LCD controller/driver supporting up to 128 segments (e.g., 4 commons × 32 segments or 8 commons × 16 segments). It generates internal bias voltages and drives LCD glass directly, eliminating the need for external driver ICs in applications like appliance displays and portable meters.

What type of memory does the HD6473837H use for program storage?

The HD6473837H uses mask-programmed ROM for program storage, with a capacity of 64 KB. This non-volatile memory is programmed during wafer fabrication and cannot be modified in-circuit, ensuring firmware integrity and immunity to accidental overwrite - ideal for high-volume, fixed-function applications.

How many analog-to-digital converter channels does the HD6473837H support?

The HD6473837H features an 8-channel, 10-bit successive-approximation A/D converter with sample-and-hold circuitry. All eight channels map to dedicated analog input pins (AD0–AD7), enabling concurrent sampling of multiple sensors such as temperature, voltage, and current in appliance and industrial control systems.

Is the HD6473837H pin-compatible with other devices in the H8/3834 Series?

Yes, the HD6473837H shares the same 100-pin PQFP package and pin assignment with other members of the H8/3834 Series, including HD6433837 and HD64F3837. This allows direct hardware substitution within the same footprint when firmware and memory requirements align, simplifying design reuse and migration paths.