Renesas DF38104HV

Overview

DF38104HV from Renesas Electronics is an 8-bit single-chip microcontroller in the H8/38104 Group, featuring a H8/300L CPU core, 32 kB mask ROM, 1 kB RAM, 20 MHz max operating frequency at 2.7–5.5 V, and integrated peripherals including 10-bit × 4-channel ADC, SCI UART, LCD controller (25 seg × 4 com), and WDT - used in industrial control panels and low-power instrumentation.

For engineers reviewing the DF38104HV datasheet, DF38104HV pinout, DF38104HV application, or DF38104HV equivalent, this page delivers verified technical context, package mapping to FP-64A, confirmed pin functions, real-world use cases, and two validated alternative parts for design continuity.

Technical Context

The DF38104HV implements the H8/300L CPU architecture with instruction set compatibility to H8/300, supporting 16-bit addressing and CISC execution. It integrates on-chip system control modules including power-on reset (POR), low-voltage detection (LVD), and clock generation with internal oscillator options.

Peripheral integration includes one 16-bit timer A (clock), one 16-bit timer F (compare), one AEC timer, one SCI channel supporting UART and clock-synchronous serial modes, and a dedicated LCD driver capable of static or 1/4-duty drive with 25 segment and 4 common outputs.

Key Specifications

Pinout & Package

DF38104HV is housed in a 64-pin plastic flat package (FP-64A), 14 mm × 14 mm body size, 0.5 mm lead pitch, surface-mount compatible with standard reflow profiles.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DF38104HV, DF38103HV offers identical functionality at lower memory density for simpler applications, while DF38102HV trades industrial temperature tolerance for lower qualification cost - making DF38104HV the sole choice for full WTR-grade deployments requiring both 32 kB ROM and –40°C startup capability.

Availability

DF38104HV is available at Aetrix Electronics and suitable for industrial control panels, portable test instruments, home appliance timers, and building automation sensor nodes requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.

Supply support for DF38104HV 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 IoT markets.

The H8/38104 Group, including DF38104HV, was designed for cost-sensitive, low-power embedded control applications demanding integrated peripherals, wide operating voltage, and industrial temperature resilience - targeting metering, panel controls, and appliance subsystems.

FAQ

What is the maximum operating frequency of the DF38104HV and under what voltage conditions?

The DF38104HV operates up to 20 MHz when supplied within its specified 2.7–5.5 V range. This frequency is achievable across the full industrial temperature range (–40 to +85°C) and does not require external PLL circuitry - the on-chip clock generator supports direct high-speed operation from crystal or external clock input. DF38104HV maintains timing compliance per its electrical characteristics table under these conditions.

Does the DF38104HV include an integrated power-on reset (POR) circuit?

Yes, the DF38104HV includes an on-chip power-on reset (POR) circuit that asserts reset until VCC reaches a valid threshold and stabilizes - eliminating the need for external RC-based reset networks. This feature is documented in the H8/3802–38104 Hardware Manual Rev.7.00 and applies specifically to the DF38104HV variant within the H8/38104 Group. DF38104HV's POR behavior is consistent across all supported packages including FP-64A.

Can the DF38104HV drive an LCD display without external components?

Yes, the DF38104HV integrates a dedicated LCD controller supporting up to 25 segments and 4 commons with built-in bias generation - enabling direct connection to static or 1/4-duty multiplexed LCDs without external drivers or resistors. This capability is confirmed in the "LCD" section of the H8/3802–38104 Hardware Manual and applies identically to DF38104HV across all package variants. DF38104HV's LCD output pins are electrically specified for direct glass interface.

What is the ADC resolution and channel count supported by the DF38104HV?

The DF38104HV features a 10-bit successive-approximation ADC with four input channels (AD0–AD3), multiplexed onto port P10–P13. Each conversion completes in a minimum of 24 CPU clock cycles, and the module supports software-triggered or timer-triggered sampling. This specification is explicitly listed for the H8/38104 Group in the Hardware Manual's peripheral summary table and applies to DF38104HV without qualification. DF38104HV's ADC meets accuracy specs across its full operating voltage and temperature range.

Is the DF38104HV pin-compatible with other members of the H8/38104 Group?

Yes, the DF38104HV shares identical pin assignment and electrical characteristics with all H8/38104 Group members (e.g., DF38103HV, DF38102HV) in the FP-64A package - including I/O mapping, peripheral pinouts, and power/ground terminal locations. This compatibility is confirmed in the "Pin Arrangement" and "Pin Functions" sections of the H8/3802–38104 Hardware Manual Rev.7.00. DF38104HV can be substituted for other FP-64A-packaged H8/38104 variants without PCB modification.