Renesas QB-64FB-EA-04T

Overview

QB-64FB-EA-04T from Renesas Electronics is a socket adapter designed for RL78 family microcontrollers in 64-pin LQFP (10×10 mm) package, enabling connection between IECUBE emulation hardware and target boards via EA (Emulation Adapter) interface. It supports RL78/G13, RL78/L12, and RL78/F12 devices, and is used in firmware development, debugging, and flash programming workflows.

For engineers reviewing the QB-64FB-EA-04T datasheet, QB-64FB-EA-04T pinout, QB-64FB-EA-04T application, or QB-64FB-EA-04T equivalent, this adapter provides verified mechanical and signal compatibility with Renesas' IECUBE ecosystem, including QB-RL78G13-ZZZ main units and YQ/NQ/HQ probe interfaces - critical for reliable on-chip debug and trace functionality during embedded MCU development.

Technical Context

The QB-64FB-EA-04T implements a passive, zero-insertion-force (ZIF)-compatible socket interface that maps all 64 pins of the target LQFP device to the IECUBE EA connector standard. It maintains full signal integrity for SWD/JTAG, reset, power, and VDD/VSS lines without level shifting or buffering.

It is mechanically engineered for repeated insertion cycles and thermal stability during extended debug sessions, and is specified for use with RL78 devices operating at 1.8–5.5 V supply ranges and up to 32 MHz CPU frequency - matching the electrical and timing requirements of the IECUBE platform's EA interface specification.

Key Specifications

Availability

QB-64FB-EA-04T is available at Aetrix Electronics and suitable for RL78-based firmware development, production programming, and engineering validation requiring stable component supply and long-term tooling continuity.

Supply support for QB-64FB-EA-04T 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 is a global semiconductor manufacturer specializing in microcontrollers, analog, and power solutions for automotive, industrial, and IoT applications.

The QB-64FB-EA-04T belongs to Renesas' IECUBE ecosystem - a dedicated hardware debugging platform designed to accelerate RL78 MCU evaluation, firmware bring-up, and production programming with minimal host PC dependency.

FAQ

What is the QB-64FB-EA-04T used for?

The QB-64FB-EA-04T is an emulation adapter that physically and electrically connects Renesas RL78 microcontrollers in 64-pin LQFP packages to the IECUBE debugging platform. It enables real-time debugging, flash programming, and trace analysis for supported RL78/G13, RL78/L12, and RL78/F12 devices - making it essential for firmware development using QB-RL78G13-ZZZ or similar main units.

Which RL78 MCUs are compatible with the QB-64FB-EA-04T?

The QB-64FB-EA-04T is explicitly listed by Renesas as compatible with RL78/G13 (e.g., R5F100LE), RL78/L12 (e.g., R5F10PLG), and RL78/F12 (e.g., R5F100MG) devices in 64-pin LQFP (10×10 mm) packages. Compatibility is defined by pin count, pitch, and signal routing alignment with the IECUBE EA interface - not by internal MCU architecture alone.

Does the QB-64FB-EA-04T require additional accessories to operate?

Yes - the QB-64FB-EA-04T requires a compatible IECUBE main unit (e.g., QB-RL78G13-ZZZ), an emulation probe (YQ/NQ/HQ series), and optionally a power-supply adapter (QB-COMMON-PW-xx). It does not include cables, sockets, or software; those must be sourced separately per Renesas' modular IECUBE system design.

Is the QB-64FB-EA-04T still in production?

Yes - unlike discontinued variants marked *1 in Renesas documentation, QB-64FB-EA-04T appears in active socket lists across multiple RL78 family pages (G13, L12, F12) without discontinuation notation. It remains a current-order part for new IECUBE-based development setups.

How does the QB-64FB-EA-04T differ from QB-64FB-EA-01T or QB-64FB-EA-03T?

The QB-64FB-EA-04T is functionally identical to QB-64FB-EA-01T and QB-64FB-EA-03T - all are 64-pin LQFP EA adapters for RL78. Differences reflect minor revision updates (e.g., contact material, mold compound, or test protocol); Renesas confirms no electrical or mechanical incompatibility, and all share the same socket footprint and pin mapping per official documentation.