Renesas QB-20SP-NQ-02T

Overview

QB-20SP-NQ-02T from Renesas Electronics is a 20-pin surface-mount target connector designed for secure, low-profile mechanical and electrical interfacing between the QB-RL78I1A in-circuit emulator and RL78/I1A-based target systems. It features 20-position 0.5 mm pitch FPC/FFC-compatible contact layout, solder-mount construction, and supports high-fidelity debug signal integrity for real-time trace, breakpoint, and memory access functions. It is used during embedded firmware development for RL78/I1A microcontrollers in industrial control and automotive body electronics.

For engineers reviewing the QB-20SP-NQ-02T datasheet, QB-20SP-NQ-02T pinout, QB-20SP-NQ-02T application, or QB-20SP-NQ-02T equivalent, this page delivers verified mechanical interface specs, mounting guidance per Renesas' official setup procedure, compatibility with QB-20SP-EA-02T exchange adapter and QB-RL78I1A emulator, and precise alignment requirements for NQGUIDE guide pins and M2 fastening screws.

Technical Context

The QB-20SP-NQ-02T serves as the fixed, board-mounted interface node in Renesas' QB-RL78I1A emulation system. It mates exclusively with the QB-20SP-YQ-02T (or compatible YQ connector) via four M2 × 10 mm screws and aligns using two non-through φ1.0 mm guide holes (NQGUIDE). Its contact design ensures stable connection for all 20 debug signals-including VDD, GND, RESET, CLK, and bidirectional data lines-under repeated plug/unplug cycles when used with YQGUIDE fastening torque ≤0.054 Nm.

This connector is specified only for use with the RL78/I1A 20SP package variant and is not interchangeable with 30SP, 38SP, or 32NA configurations. It requires two-component epoxy adhesive (≥30 min cure time) for permanent PCB mounting and mandates power-off mating to prevent GND potential difference damage per Renesas safety guidelines.

Key Specifications

Availability

QB-20SP-NQ-02T is available at Aetrix Electronics and suitable for RL78/I1A-based industrial control units, automotive body electronics modules, and consumer appliance firmware development requiring stable component supply, traceable sourcing, and long-term BOM continuity.

Supply support for QB-20SP-NQ-02T 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, power, and IoT solutions for automotive, industrial, and infrastructure markets.

QB-20SP-NQ-02T belongs to Renesas' IECUBE in-circuit emulator accessory product line, engineered specifically to enable robust, repeatable physical interfacing between high-performance emulators and RL78-family microcontroller target boards.

FAQ

What is the primary function of QB-20SP-NQ-02T in the QB-RL78I1A emulation system?

QB-20SP-NQ-02T is a 20-pin surface-mount target connector that provides the permanent, soldered interface point on the user's RL78/I1A target board. It enables reliable mechanical and electrical connection to the QB-RL78I1A emulator via the YQ connector and EA adapter. QB-20SP-NQ-02T carries all essential debug signals-including power, ground, reset, clock, and bidirectional data lines-ensuring signal integrity during real-time execution, trace capture, and memory manipulation operations.

Which RL78/I1A package variants is QB-20SP-NQ-02T compatible with?

QB-20SP-NQ-02T is explicitly designated for the RL78/I1A 20SP (20-pin small outline) package only. It is not compatible with 30SP, 38SP, or 32NA variants, as confirmed by Table 1-3 "Adapters and Connectors for Each Target Device" in the QB-RL78I1A User's Manual. Using QB-20SP-NQ-02T with other packages risks misalignment, incomplete signal mapping, and unreliable debug session stability.

How is QB-20SP-NQ-02T mounted to the target PCB?

QB-20SP-NQ-02T must be mounted using thin-layer two-component epoxy adhesive applied to the four base projections, followed by precise alignment using the NQGUIDE φ1.0 mm guide pins inserted into non-through holes on the target board. Soldering is performed after fitting the mount adapter (MA), under strict thermal limits: reflow ≤260°C for 10 seconds max or manual soldering ≤350°C for 5 seconds per pin. Flux immersion washing is prohibited.

What fastening hardware and torque specification applies to QB-20SP-NQ-02T?

QB-20SP-NQ-02T is secured to the mating YQ connector using four M2 × 10 mm screws supplied with the YQ assembly. The maximum recommended tightening torque is 0.054 Nm, applied equally across all four corners using a torque driver or #0/#1 Phillips precision screwdriver. Exceeding this torque risks deformation of the NQ housing or poor contact pressure, leading to intermittent debug communication failures in QB-20SP-NQ-02T operation.

Does QB-20SP-NQ-02T include any onboard active circuitry or passive components?

No. QB-20SP-NQ-02T is a passive mechanical and electrical interconnect component-specifically a 20-position, 0.5 mm pitch surface-mount connector with no integrated ICs, resistors, capacitors, or active elements. Its sole function is to provide a durable, low-inductance signal path between the target board and the QB-RL78I1A emulator system. All timing, logic, and power conditioning functions reside in the QB-RL78I1A unit or target MCU, not in QB-20SP-NQ-02T.