Renesas QB-20MC-NQ-01T

Overview

QB-20MC-NQ-01T from Renesas Electronics is a target connector designed for in-circuit emulation of the 78K0S/KA1+ microcontroller in 20-pin MC package. It provides mechanical and electrical interface between the QB-78K0SKX1 emulator and the target system, supports 2.0–5.5 V operation, enables real-time debugging via single-wire or probe-based connection, and is used with the QB-20MC-EA-01T exchange adapter and QB-50-EP-01T emulation probe.

For engineers reviewing the QB-20MC-NQ-01T datasheet, QB-20MC-NQ-01T pinout, QB-20MC-NQ-01T application, or QB-20MC-NQ-01T equivalent, this page delivers verified mechanical interface specs, target-system integration requirements, compatibility with 78K0S/KA1+, and selection guidance among Renesas IECUBE ecosystem connectors.

Technical Context

The QB-20MC-NQ-01T is a solder-mount, 20-pin male header connector specifically engineered for the 78K0S/KA1+ MCU in 20-pin MC (Mini-Ceramic) package. It mates with the QB-20MC-EA-01T exchange adapter to route debug signals-including RESET, CLK, VDD, GND, and serial data lines-from the QB-78K0SKX1 emulator to the target PCB.

It operates across the full 2.0–5.5 V supply range of the 78K0S/KA1+, supports both real-time execution (Go, Come Here) and non-real-time functions (Step In, Breakpoints), and is qualified under Renesas' Standard quality grade for industrial and embedded development use.

Key Specifications

Availability

QB-20MC-NQ-01T is available at Aetrix Electronics and suitable for embedded microcontroller development, industrial control prototyping, and automotive ECU validation requiring stable component supply and traceable sourcing of Renesas IECUBE ecosystem parts.

Supply support for QB-20MC-NQ-01T 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 formed in 2010 through the merger of NEC Electronics and Renesas Technology, specializing in microcontrollers, analog, and power solutions.

QB-20MC-NQ-01T belongs to the IECUBE in-circuit emulator accessory product line, designed to provide reliable, low-risk physical interface hardware for 78K0S-series MCU development and validation.

FAQ

What is the QB-20MC-NQ-01T used for?

The QB-20MC-NQ-01T is a dedicated target connector that establishes the physical interface between the QB-78K0SKX1 in-circuit emulator and a target board hosting the 78K0S/KA1+ microcontroller in a 20-pin MC package. It ensures correct signal routing for debugging functions including reset control, clock injection, and serial communication. The QB-20MC-NQ-01T must be used with the QB-20MC-EA-01T exchange adapter and QB-50-EP-01T emulation probe to complete the debug chain.

Is the QB-20MC-NQ-01T compatible with other Renesas emulators?

No - the QB-20MC-NQ-01T is specifically designed for use with the QB-78K0SKX1 IECUBE emulator system and is not compatible with earlier or alternate Renesas emulator platforms such as the M32C or RX series tools. Its pin assignment, mechanical layout, and signal mapping are optimized solely for the 78K0S/Kx1+ family and the QB-78K0SKX1 host unit. Using QB-20MC-NQ-01T with non-QB-78K0SKX1 hardware may result in misconnection or damage.

Does the QB-20MC-NQ-01T require external power?

No - the QB-20MC-NQ-01T is a passive mechanical connector with no active circuitry or power requirements. It routes power (VDD), ground (GND), and debug signals directly from the QB-78K0SKX1 via the QB-20MC-EA-01T exchange adapter to the target board. Power for the target system is supplied either by the QB-78K0SKX1 (up to 5.5 V, ~17 mA) or externally, but the QB-20MC-NQ-01T itself draws zero current.

What is the pitch and mounting specification of the QB-20MC-NQ-01T?

The QB-20MC-NQ-01T uses a 0.635 mm (0.025 inch) pin pitch with vertical through-hole mounting. Its recommended footprint matches Renesas' mechanical specification for 20-pin MC-package target interfaces: vertical 0.635 mm × horizontal 0.635 mm grid, 6 mm pin height. The connector is supplied as a standalone part and must be soldered onto the target PCB before emulator integration - no surface-mount or press-fit variants exist for this part number.

Can the QB-20MC-NQ-01T be used without the QB-20MC-EA-01T adapter?

No - the QB-20MC-NQ-01T is not directly compatible with the QB-78K0SKX1 main unit. It must be used in conjunction with the QB-20MC-EA-01T exchange adapter, which performs pin translation and signal conditioning between the emulator's 30-pin interface and the 20-pin MC target footprint. Omitting the QB-20MC-EA-01T will result in incorrect signal mapping, loss of debug functionality, and potential hardware conflict. The QB-20MC-NQ-01T and QB-20MC-EA-01T are co-designed as an inseparable pair for 78K0S/KA1+ emulation.