Renesas UPD70F3729GC-8BT-A

Overview

UPD70F3729GC-8BT-A from Renesas Electronics is a 32-bit V850ES/KJ2 single-chip microcontroller featuring 512 KB on-chip Flash memory, 48 KB RAM, and integrated peripherals including UART, CAN 2.0B controller, 16-bit timer arrays, and 10-bit ADC. It operates at up to 32 MHz with 2.7–5.5 V supply voltage and targets embedded control in industrial automation and automotive body electronics.

For engineers reviewing the UPD70F3729GC-8BT-A datasheet, UPD70F3729GC-8BT-A pinout, UPD70F3729GC-8BT-A application, or UPD70F3729GC-8BT-A equivalent, key selection criteria include its V850ES CPU core compliance, CAN interface support, Flash endurance (100K write/erase cycles), operating temperature range (−40°C to +85°C), and QFP-100 package compatibility with legacy V850ES/KJ2 designs.

Technical Context

The UPD70F3729GC-8BT-A implements the V850ES RISC architecture with 3-stage pipeline execution, supporting both little-endian and big-endian data access. It integrates a dedicated CAN 2.0B controller with message object buffers and automatic retransmission logic, alongside a 10-channel 10-bit ADC with programmable sampling timing and conversion trigger sources.

Its peripheral bus supports synchronous/asynchronous external memory expansion up to 16 MB, with configurable wait-state insertion and chip-select timing control. The device includes a watchdog timer with independent clock source, low-voltage detection circuit, and on-chip debug interface compliant with IEEE 1149.1 (JTAG) for real-time in-circuit debugging.

Key Specifications

Pinout & Package

UPD70F3729GC-8BT-A is housed in a 100-pin plastic quad flat package (QFP) with 0.5 mm lead pitch, compliant with JEDEC MS-026. The package supports surface-mount assembly and provides thermal pad exposure for enhanced heat dissipation in high-duty-cycle operation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 32-bit microcontroller applications.

Compared with UPD70F3729GC-8BT-A, R5F566TEADFP offers better active power efficiency but requires external CAN implementation, whereas UPD70F3733GC-8BT-A provides seamless scalability within the same footprint and toolchain.

Availability

UPD70F3729GC-8BT-A is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and smart energy metering applications requiring stable component supply and long-term lifecycle support.

Supply support for UPD70F3729GC-8BT-A 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 infrastructure markets.

The V850ES/KJ2 product line delivers high-reliability 32-bit MCUs optimized for real-time control in harsh environments, with emphasis on CAN-enabled automotive subsystems and deterministic industrial motion control.

FAQ

What is the maximum operating frequency of the UPD70F3729GC-8BT-A?

The UPD70F3729GC-8BT-A operates at a maximum CPU clock frequency of 32 MHz, achievable using the on-chip PLL with external crystal input (1–8 MHz). This frequency is sustained across the full −40°C to +85°C temperature range and 2.7–5.5 V supply voltage, enabling deterministic real-time response in time-critical embedded applications.

Does the UPD70F3729GC-8BT-A support CAN FD?

No, the UPD70F3729GC-8BT-A implements a CAN 2.0B controller compliant with ISO 11898-1:2003, supporting standard and extended frame formats at bit rates up to 1 Mbps. It does not support CAN FD features such as flexible data-rate switching or increased payload length. For CAN FD requirements, consider newer Renesas RA or RH850 families.

Is the UPD70F3729GC-8BT-A pin-compatible with other V850ES/KJ2 devices?

Yes, the UPD70F3729GC-8BT-A shares the same 100-pin QFP package and pin assignment with other members of the V850ES/KJ2 family, including UPD70F3733GC-8BT-A and UPD70F3734GC-8BT-A. This allows direct PCB reuse when upgrading Flash/RAM capacity or selecting alternate variants within the same package footprint.

What debug interface does the UPD70F3729GC-8BT-A provide?

The UPD70F3729GC-8BT-A includes an IEEE 1149.1-compliant JTAG interface supporting full boundary-scan testing, real-time trace, and non-intrusive breakpoints. It is compatible with Renesas E1/E20 emulators and third-party tools supporting V850ES debug protocols, enabling complete firmware development and validation without requiring dedicated debug pins beyond the standard JTAG header.

What is the Flash memory endurance specification for the UPD70F3729GC-8BT-A?

The UPD70F3729GC-8BT-A uses SuperFlash® technology with guaranteed endurance of 100,000 write/erase cycles per sector and data retention exceeding 10 years at +85°C. Sector erase granularity (1 KB minimum) and program/erase suspend capability allow background firmware updates without halting real-time application tasks.