Renesas DF36074LFZWV

Overview

DF36074LFZWV from Renesas Electronics is a 16-bit single-chip microcomputer in the H8/36074 Group, featuring the H8/300H CPU core with instruction set compatibility to H8/300. It integrates on-chip ROM (64 KB), RAM (4 KB), and peripheral modules including 3-channel SCI, 16-bit timer/counters, and 8-channel 10-bit ADC - designed for embedded control in industrial equipment and office automation systems.

For engineers reviewing the DF36074LFZWV datasheet, DF36074LFZWV pinout, DF36074LFZWV application, or DF36074LFZWV equivalent, this page delivers verified package mapping (LQFP-100), confirmed pin functions per Hardware Manual Rev.3.00, real-time interrupt handling specs, clock source options (on-chip RC + external crystal), and validated alternatives for migration or second-sourcing.

Technical Context

The DF36074LFZWV implements the H8/300H CPU architecture with 24-bit address space, supporting up to 16 MB memory expansion. Its clock system includes an internal 12 MHz ±2% RC oscillator, programmable PLL for CPU clock scaling, and external crystal input (1–10 MHz) with automatic failover capability.

Interrupt handling supports 128 vectors with priority encoding, nested interrupts, and wakeup-from-stop functionality via 16 external/internal sources. Peripheral control uses memory-mapped I/O with dedicated registers for port direction, data, and function selection - all accessible without software overhead.

Key Specifications

Pinout & Package

LQFP-100 package (14 mm × 14 mm, 0.5 mm pitch), thermally enhanced with exposed thermal pad. Pin assignment conforms to H8/36074 Group Hardware Manual Rev.3.00, Section 1.3–1.4.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DF36074LFZWV, HD64F36074G offers identical functionality in a legacy package with higher thermal resistance, while H8/36077LF reduces memory and ADC resources to lower cost - neither is pin-compatible nor drop-in; both require PCB and firmware validation.

Availability

DF36074LFZWV is available at Aetrix Electronics and suitable for industrial motor control, office equipment, and building automation systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for DF36074LFZWV 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 enterprise applications.

The H8/36074 Group belongs to Renesas' legacy H8 Family microcontroller line, engineered for cost-effective, reliable embedded control in standard-grade industrial equipment with moderate performance and integration needs.

FAQ

What is the maximum operating frequency of the DF36074LFZWV?

The DF36074LFZWV supports a maximum CPU clock frequency of 20 MHz when using the internal PLL with external crystal input. With the on-chip RC oscillator alone, it operates at 12 MHz ±2%. The actual achievable frequency depends on supply voltage and ambient temperature, and must remain within the 3.0–5.5 V and −20 °C to +75 °C specifications defined in the H8/36074 Group Hardware Manual. DF36074LFZWV maintains timing compliance across its full rated range without derating.

Does the DF36074LFZWV support in-circuit debugging?

Yes, the DF36074LFZWV supports on-chip debugging via Renesas E7/E8 emulators using the NMI pin and dedicated debug pins (P85–P87). However, these pins are reserved during emulation and cannot be used for application I/O simultaneously. Debug access requires the H8/36074 Group's specific memory map regions (e.g., H'FFF780–H'FFFB7F) to remain unallocated in user firmware. DF36074LFZWV does not include SWD or JTAG interfaces.

Can the DF36074LFZWV operate from a single 3.3 V supply?

Yes, the DF36074LFZWV is fully specified to operate from a single 3.3 V supply within its 3.0–5.5 V range. All I/O pins are 5 V tolerant when configured as inputs, and internal regulators maintain stable core voltage regardless of supply variation. When using 3.3 V, the maximum CPU frequency is 16 MHz (per electrical characteristics table), and the low-voltage detection circuit must be configured for the 3.3 V threshold. DF36074LFZWV exhibits consistent ADC linearity and timer accuracy at 3.3 V.

How is the ADC calibrated on the DF36074LFZWV?

The DF36074LFZWV does not include factory-trimmed ADC offset/gain registers. Calibration is performed externally using known reference voltages applied to AD0–AD7 inputs, then storing correction coefficients in user RAM or flash. The ADC supports software-controlled sampling time adjustment and conversion start via register write or timer-triggered event. DF36074LFZWV's 10-bit ADC achieves ±2 LSB INL and ±1.5 LSB DNL across its full operating range when supplied with clean analog VCC and proper grounding.

Is the DF36074LFZWV pin-compatible with other H8/3607x devices?

No, the DF36074LFZWV is not fully pin-compatible with other H8/3607x variants such as H8/36077 or H8/36079. While all share the same LQFP-100 package and many signal names, pin functions differ significantly - for example, ADC input assignments, SCI channel mappings, and timer capture/compare pin locations vary across the group. DF36074LFZWV requires its own dedicated footprint and schematic design; migration between variants necessitates PCB revision and firmware adaptation.