Renesas UPD70F3747GB-GAH-AX

Overview

UPD70F3747GB-GAH-AX from Renesas Electronics is a 32-bit V850ES/HE3 single-chip microcontroller featuring a 32 MHz max CPU clock, 256 KB on-chip Flash memory, 16 KB RAM, and integrated peripherals including 8-channel 10-bit ADC, UART, I²C, and 16-bit timer/counters. It operates from 2.7–3.6 V and targets industrial control and embedded instrumentation applications requiring deterministic real-time response.

For engineers reviewing the UPD70F3747GB-GAH-AX datasheet, UPD70F3747GB-GAH-AX pinout, UPD70F3747GB-GAH-AX application, or UPD70F3747GB-GAH-AX equivalent, key selection criteria include its V850ES core instruction compatibility, Flash endurance (10,000 write/erase cycles), operating temperature range (−40°C to +85°C), and support for in-circuit debugging via JTAG interface.

Technical Context

The UPD70F3747GB-GAH-AX implements the V850ES RISC architecture with 3-stage pipeline execution, supporting both little-endian and big-endian data access modes. It integrates a programmable watchdog timer, power-on reset circuit, and low-power stop/sleep modes with wake-up via external interrupt or peripheral event.

Peripheral subsystems include a 4-channel DMA controller, 8-channel 10-bit ADC with sample-and-hold, and dual UARTs with automatic baud rate detection. All I/O ports support configurable pull-up/pull-down and Schmitt-trigger input hysteresis for noise immunity in industrial environments.

Key Specifications

Pinout & Package

UPD70F3747GB-GAH-AX is housed in a 100-pin LQFP package (14 mm × 14 mm, 0.5 mm pitch) with exposed thermal pad. Pin assignment follows the V850ES/HE3 standard layout defined in Renesas User's Manual U18854EJ2V0UD Chapter 1.5.1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with UPD70F3747GB-GAH-AX, UPD70F3750GC-GAD-AX adds CAN but increases package size and cost, while R5F566TEADFP delivers higher compute throughput at the expense of legacy V850ES toolchain compatibility and larger power consumption.

Availability

UPD70F3747GB-GAH-AX is available at Aetrix Electronics and suitable for industrial automation, smart sensor systems, and embedded HMI applications requiring stable component supply across multi-year production cycles.

Supply support for UPD70F3747GB-GAH-AX 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 manufacturer formed in 2010 through the merger of NEC Electronics and Renesas Technology, specializing in microcontrollers, analog, and power devices.

The V850ES/HE3 product line was designed for cost-sensitive, high-reliability industrial control applications where deterministic real-time performance and long-term supply stability are prioritized over raw processing speed.

FAQ

What is the maximum operating frequency of the UPD70F3747GB-GAH-AX?

The UPD70F3747GB-GAH-AX supports a maximum CPU clock frequency of 32 MHz when powered at 3.3 V. This frequency is achieved using the on-chip PLL with an external 4 MHz crystal or CMOS clock input. Operation above 32 MHz is not supported and may cause undefined behavior or timing violations in internal peripherals.

Does the UPD70F3747GB-GAH-AX support in-system programming?

Yes, the UPD70F3747GB-GAH-AX supports in-system programming via its JTAG interface or UART-based bootloader. The on-chip Flash memory allows field firmware updates without removing the device from the PCB. Programming requires Renesas' PG-FP5 programmer or compatible tools supporting V850ES Flash command set.

What is the Flash endurance specification for UPD70F3747GB-GAH-AX?

The UPD70F3747GB-GAH-AX Flash memory is rated for 10,000 write/erase cycles per sector under standard operating conditions (25°C, VDD = 3.3 V). Endurance decreases at elevated temperatures or reduced supply voltage; Renesas recommends limiting sector rewrites to ≤1,000 cycles/year for 10-year product lifetime in industrial deployments.

Can UPD70F3747GB-GAH-AX operate from a single 3.3 V supply?

Yes, the UPD70F3747GB-GAH-AX operates from a single 3.3 V supply across its full industrial temperature range (−40°C to +85°C). Its internal voltage regulator provides stable core voltage, and all I/Os are 3.3 V tolerant. External decoupling (two 100 nF ceramic capacitors near VDD pins) is required per Renesas hardware design guidelines.

Is JTAG debugging supported on UPD70F3747GB-GAH-AX?

Yes, UPD70F3747GB-GAH-AX fully supports IEEE 1149.1 JTAG debugging via TDI, TDO, TCK, and TMS pins. It enables real-time register inspection, breakpoint setting, and flash programming using Renesas E1/E20 emulators or third-party tools compliant with V850ES debug protocol.