Renesas UPD70F3426AGJ(A)-GAE-AX

Overview

UPD70F3426AGJ(A)-GAE-AX from Renesas Electronics is a 32-bit V850E/DJ3 RISC microcontroller designed for automotive body and dashboard control. It integrates 2 MB flash memory, 84 KB RAM, dual CAN interfaces (AFCAN), 12-channel 10-bit ADC, and dedicated 6-channel stepper motor drivers. Its 144-pin QFP package supports LCD interface and operates from 3.2 V to 5.5 V.

For engineers reviewing the UPD70F3426AGJ(A)-GAE-AX datasheet, UPD70F3426AGJ(A)-GAE-AX pinout, UPD70F3426AGJ(A)-GAE-AX application, or UPD70F3426AGJ(A)-GAE-AX equivalent, key selection criteria include CAN bus timing compliance, stepper motor driver current capability, flash memory access latency for real-time control loops, and power-on reset behavior under 4.0–5.5 V full-operation range.

Technical Context

The UPD70F3426AGJ(A)-GAE-AX implements the V850E CPU core with 5-stage pipeline and supports multiple clock sources: main oscillator (up to 64 MHz), sub-oscillator (32 kHz), ring oscillator (240 kHz), and peripheral PLL. Its memory architecture partitions 2 MB flash into two banks - lower 1 MB directly accessible in one cycle, upper 1 MB requiring two cycles for consecutive 32-bit accesses.

Peripheral integration includes three UARTA channels, two I²C interfaces, three CSIB (clocked serial I/O) modules, 10-channel timer (TMZ), watchdog timer (WDT), on-chip debug support, and voltage comparators. Stepper motor control uses dedicated C/D outputs with current-limiting I/O buffers and independent phase sequencing logic.

Key Specifications

Pinout & Package

UPD70F3426AGJ(A)-GAE-AX is housed in a 144-pin plastic quad flat pack (QFP) with 0.5 mm lead pitch and 20 mm × 20 mm body size. Thermal resistance θ_JA is 30 °C/W (JEDEC Std 51-7).

Key Features

Applications

Equivalent & Alternatives

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

Compared with UPD70F3426AGJ(A)-GAE-AX, UPD70F3425GJ(A)-GAE-AX offers identical peripheral timing and CAN behavior at lower memory cost, while R5F566TEADFP provides CAN FD and higher MIPS but lacks native stepper control - requiring redesign of motor interface circuitry.

Availability

UPD70F3426AGJ(A)-GAE-AX is available at Aetrix Electronics and suitable for automotive instrument clusters, body control modules, and HVAC control units requiring stable component supply across extended temperature ranges (−40°C to +125°C).

Supply support for UPD70F3426AGJ(A)-GAE-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 headquartered in Japan, specializing in microcontrollers, analog, and power solutions for automotive, industrial, and IoT markets.

The V850E/DJ3 product line, including UPD70F3426AGJ(A)-GAE-AX, was engineered specifically for cost-optimized automotive body electronics where CAN networking, stepper actuation, and LCD display integration are required without external support ICs.

FAQ

What is the maximum operating frequency of the UPD70F3426AGJ(A)-GAE-AX CPU core?

The UPD70F3426AGJ(A)-GAE-AX features a V850E 32-bit RISC core with a maximum operating frequency of 64 MHz using the main oscillator. This frequency is achievable under full-voltage operation (4.0–5.5 V) and ambient temperatures up to +85°C. At extended temperature (−40°C to +125°C), the maximum guaranteed frequency is 32 MHz per the device's operating conditions specification.

Does the UPD70F3426AGJ(A)-GAE-AX support CAN FD or only classical CAN?

The UPD70F3426AGJ(A)-GAE-AX implements two AFCAN controllers compliant with ISO 11898-1 (Classical CAN) up to 1 Mbps. It does not support CAN FD data rates or protocol extensions. The peripheral lacks FD-specific registers, bit-rate switching logic, and payload length >8 bytes - confirmed by the "Peripheral Function Characteristics" section (7.5.4) of the datasheet.

How many ADC channels does the UPD70F3426AGJ(A)-GAE-AX have, and what is their resolution?

The UPD70F3426AGJ(A)-GAE-AX integrates a 12-channel, 10-bit successive approximation ADC. All 12 channels are accessible via dedicated pins (P70–P79, P134–P135), with conversion time of 1.2 µs per channel. The ADC supports both internal (AVREF) and external reference voltage inputs, and its accuracy is specified as ±2 LSB INL over the −40°C to +85°C range.

Is the UPD70F3426AGJ(A)-GAE-AX pin-compatible with other DJ3 family members like UPD70F3425GJ(A)-GAE-AX?

Yes, UPD70F3426AGJ(A)-GAE-AX is pin-compatible with UPD70F3425GJ(A)-GAE-AX and UPD70F3424GJ(A)-GAE-AX, all using the 144-pin QFP (GJ) package. Pin functions, layout, and mechanical dimensions match exactly - enabling shared PCB design across memory variants. However, CRXD2/CTXD2 pins are not implemented on UPD70F3426AGJ(A)-GAE-AX, leaving them NC.

What power supply requirements must be met for reliable operation of the UPD70F3426AGJ(A)-GAE-AX?

The UPD70F3426AGJ(A)-GAE-AX requires separate analog (AVDD/AVSS) and digital (DVDD/DVSS) supplies, plus dedicated stepper motor (SMVDD/SMVSS) rails. Core logic operates from 3.2 V to 5.5 V, but full functionality (including ADC and stepper drivers) is guaranteed only between 4.0 V and 5.5 V due to the Power-On Clear (POC) circuit's activation threshold. Each supply rail must be decoupled with ≥1 µF ceramic capacitors near the respective REGCx pins.