Renesas QS32XL384Q1G

Overview

QS32XL384Q1G from Renesas Electronics is a high-speed CMOS 20-bit bus switch with TTL-compatible I/O, 5 Ω typical ON resistance, zero propagation delay, and industrial temperature range (–40°C to +85°C). It enables bidirectional signal routing between two 20-bit buses (A0–A19 and B0–B19) under four independent enable controls (BEA–BED), used in hot-swapping, voltage translation (5V ↔ 3.3V), and bus isolation.

For engineers reviewing the QS32XL384Q1G datasheet, QS32XL384Q1G pinout, QS32XL384Q1G application, or QS32XL384Q1G equivalent, key selection criteria include guaranteed 5 Ω R_ON, undershoot clamp diodes on all control and switch inputs, 48-pin QVSOP package, and support for capacitance reduction and logic-level translation without added ground bounce.

Technical Context

The QS32XL384Q1G implements twenty independent N-channel FET switches with no inherent body diode to V_CC, enabling true bidirectional signal flow and eliminating forward-bias leakage paths. Each switch group (five bits per BE input) operates with zero intrinsic propagation delay and zero ground bounce due to low R_ON and optimized charge handling.

It features TTL-compatible input thresholds (V_IL ≤ 0.8 V, V_IH ≥ 2.0 V), ±1 μA max input leakage, and undershoot clamp diodes on all A/B and BE pins-critical for hot-dock reliability and ESD robustness in dynamic insertion environments.

Key Specifications

Pinout & Package

QS32XL384Q1G is housed in a 48-pin QVSOP (Quad Very Small Outline Package) with 0.4 mm pitch, designed for high-density PCB layouts and thermal efficiency in space-constrained applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74CBT3244DBR and PI3CH485QE, the QS32XL384Q1G uniquely delivers per-five-bit enable control, integrated undershoot clamps on all pins, and verified zero-ground-bounce operation-making it optimal for hot-dock systems requiring granular fault containment and transient resilience.

Availability

QS32XL384Q1G is available at Aetrix Electronics and suitable for industrial automation interfaces, mobile docking stations, and embedded computing backplanes requiring stable component supply and long-term lifecycle assurance.

Supply support for QS32XL384Q1G 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 delivering microcontrollers, analog, power, and connectivity solutions for automotive, industrial, and IoT applications.

The QS32XL384Q1G belongs to Renesas' QuickSwitch® bus switch product line, engineered specifically for high-fidelity, low-latency digital signal routing in hot-plug, voltage-translation, and bus-isolation systems.

FAQ

What is the maximum operating voltage for QS32XL384Q1G?

The QS32XL384Q1G supports an absolute maximum supply voltage (V_CC) of +7 V, with recommended operation at 5.0 V ±5%. All I/O and control pins tolerate –0.5 V to +7 V, enabling robustness against overshoot and undershoot transients during hot-swap events. This rating is validated across the full industrial temperature range (–40°C to +85°C).

Does QS32XL384Q1G support bidirectional signal flow?

Yes, QS32XL384Q1G supports fully bidirectional signal flow between Bus A and Bus B terminals without direction control logic. Its enhanced N-channel FET design lacks an inherent body diode to V_CC, eliminating asymmetric conduction and enabling true passive signal routing in either direction-critical for data bus and clock gating applications.

How many enable signals does QS32XL384Q1G have, and what do they control?

QS32XL384Q1G has four independent Bus Enable (BEA, BEB, BEC, BED) inputs, each controlling a distinct five-bit segment: BEA → A0–A4/B0–B4; BEB → A15–A19/B15–B19; BEC → A5–A9/B5–B9; BED → A10–A14/B10–B14. This granular control enables selective isolation of bus subsections during partial hot-swap or power-gating operations.

What is the typical ON-resistance of QS32XL384Q1G, and how does it affect signal integrity?

The typical ON-resistance of QS32XL384Q1G is 5 Ω at V_CC = 5 V and I_ON = 30 mA. This low R_ON minimizes RC delay and voltage drop across the switch, preserving signal edge rates and reducing timing uncertainty-especially important in high-speed parallel buses where cumulative loading degrades setup/hold margins.

Is QS32XL384Q1G suitable for 5V-to-3.3V voltage translation?

Yes, QS32XL384Q1G is explicitly qualified for 5V-to-3.3V voltage translation. Its TTL-compatible input thresholds (V_IL ≤ 0.8 V, V_IH ≥ 2.0 V), 5 Ω R_ON, and absence of body diodes allow clean, low-skew bidirectional level shifting without external biasing-verified in Renesas application notes for mixed-voltage system interconnects.