Renesas DF36074LFZV

Overview

DF36074LFZV from Renesas Electronics is a 16-bit single-chip microcomputer in the H8/36074 Group, featuring the H8/300H CPU core, 128 KB on-chip ROM, 8 KB RAM, and integrated peripherals including UART (SCI), I²C, 16-bit timers, and 8-channel 10-bit ADC - deployed in industrial control panels requiring deterministic real-time response.

For engineers reviewing the DF36074LFZV datasheet, DF36074LFZV pinout, DF36074LFZV application, or DF36074LFZV equivalent, this page delivers verified package mapping (LQFP-100), confirmed clock architecture (on-chip RC + external crystal support), validated peripheral register layout, and two field-tested alternative MCUs with documented functional alignment for legacy H8-based designs.

Technical Context

The DF36074LFZV implements the H8/300H CPU core with 16-bit data bus, 24-bit address space (up to 16 MB), and instruction set compatibility with earlier H8/300 devices. It supports multiple clock sources: internal 16 MHz RC oscillator (±1% trimmable), external crystal (1–20 MHz), or external clock input.

Peripheral integration includes three serial communication interfaces (SCI0–SCI2), one I²C bus interface, eight 16-bit timer channels (with input capture/output compare), and an 8-channel 10-bit successive-approximation ADC with sample-and-hold. All peripherals are memory-mapped and controlled via dedicated registers accessible in supervisor or user mode.

Key Specifications

Pinout & Package

LQFP-100 package (14 mm × 14 mm, 0.5 mm pitch) with exposed thermal pad; RoHS-compliant, lead-free finish.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit microcontroller applications.

Compared with HD64F36074L, DF36074LFZV offers updated manufacturing traceability and lifecycle support; compared with H8/36077LF, it delivers 2× ROM, 2× RAM, and expanded serial/ADC resources - making DF36074LFZV optimal for new designs requiring headroom in firmware size and peripheral concurrency.

Availability

DF36074LFZV is available at Aetrix Electronics and suitable for industrial PLC I/O modules, building automation controllers, and factory-floor HMI terminals requiring stable component supply across multi-year production cycles.

Supply support for DF36074LFZV 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 Japanese semiconductor manufacturer specializing in microcontrollers, analog, power, and connectivity solutions for industrial, automotive, and infrastructure markets.

The H8 Family - including the H8/36074 Group - was designed for cost-sensitive, real-time embedded control applications in industrial equipment, office automation, and consumer appliances, emphasizing code efficiency, peripheral integration, and long-term supply stability.

FAQ

What is the maximum operating frequency of the DF36074LFZV?

The DF36074LFZV operates at up to 20 MHz system clock frequency when driven by an external crystal or clock source. Its internal RC oscillator runs at 16 MHz (trimmable to ±1%). The CPU executes instructions at 1–2 cycles per instruction depending on addressing mode, delivering ~10 MIPS performance at 20 MHz. This frequency is fully supported across the entire 3.0–5.5 V supply range and industrial temperature grade (−40°C to +85°C).

Does the DF36074LFZV support in-circuit debugging?

Yes, the DF36074LFZV supports on-chip debugging via Renesas E7/E8 emulators using the NMI pin and dedicated debug pins (P85–P87). However, those pins are reserved during emulator use and cannot serve dual functions. Debug access requires boot mode configuration and uses dedicated memory regions (e.g., H'F780–H'FB7F) that must not be accessed by application code. Full debug capability includes breakpoints, watchpoints, and register visibility.

What is the ADC reference voltage source for the DF36074LFZV?

The DF36074LFZV ADC uses AVCC (pin 100) as its positive reference voltage and AVSS (pin 99) as its negative reference. AVCC and AVSS must be decoupled with 0.1 µF capacitors close to the pins. The ADC does not include an internal reference; external precision references can be applied to AVCC if higher accuracy is required. Conversion results are linear across the full 0–AVCC input range with typical INL of ±1 LSB.

Is the DF36074LFZV pin-compatible with other H8/3607x devices?

Yes, the DF36074LFZV shares the same LQFP-100 pinout with all members of the H8/36074 Group (e.g., DF36074GF, HD64F36074G/L) and maintains partial compatibility with the H8/36077 Group. Key signals - including power, reset, clock, and primary I/O ports - align across these families. Peripheral-specific pins (e.g., SCI2, extra ADC channels) are No Connect on lower-tier variants, enabling upward-compatible PCB design.

What quality grade is assigned to the DF36074LFZV?

The DF36074LFZV is classified as a "Standard" quality grade device per Renesas documentation, intended for applications including industrial robots, office equipment, test and measurement instruments, and home electronic appliances. It is not qualified for automotive, medical life-support, or aerospace use. Its specification limits - such as operating temperature (−40°C to +85°C) and ESD rating (2 kV HBM) - reflect this Standard-grade classification.