Renesas QS32390QG

Overview

QS32390QG from Renesas Electronics is a high-speed CMOS 16:8 bidirectional multiplexer switch with zero propagation delay, 5Ω typical ON resistance, and industrial temperature range (–40°C to +85°C). It enables hot-swappable signal routing between two 8-bit buses (A/B) and a common 8-bit bus (AB), supporting voltage translation between 5V and 3.3V logic domains in video/audio switching systems.

For engineers reviewing the QS32390QG datasheet, QS32390QG pinout, QS32390QG application, or QS32390QG equivalent, key selection criteria include guaranteed sub-1.25 ns max propagation delay, ±1 µA input leakage, 25Ω on-chip termination resistors for reflection suppression, and undershoot clamp diodes on all I/O and control pins.

Technical Context

The QS32390QG implements a dual-bus 16:8 multiplexer using enhanced N-channel FETs without inherent body diodes to V_CC, enabling true bidirectional signal flow with no DC path to supply. Its architecture supports simultaneous A→AB and B→AB connection when both AEN and BEN are low, and isolates bus capacitance during disable states.

Switching is controlled by two independent enable inputs (AEN, BEN), each driving eight parallel channels. The device operates at 5.0 V ±5%, with guaranteed logic thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V) and dynamic current draw of 0.25 mA/MHz per toggling control input - critical for low-noise, high-frequency bus isolation.

Key Specifications

Pinout & Package

QS32390QG is housed in a 28-pin Quarter Size Outline Package (QSOP), package code PCG28, with 0.65 mm lead pitch and JEDEC MS-013 compliant footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74CBT16210DGGR and PI3CH400QE, the QS32390QG uniquely combines 16:8 channel density, 5V tolerance, integrated 25Ω termination, and industrial temperature rating - making it the only option qualified for ruggedized video switching and hot-dock interfaces requiring full 5V/3.3V interoperability.

Availability

QS32390QG is available at Aetrix Electronics and suitable for video switching, hot-swap docking, and voltage translation applications requiring stable component supply, long-term industrial lifecycle support, and RoHS-compliant packaging.

Supply support for QS32390QG 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, infrastructure, and IoT markets.

The QS32390QG belongs to Renesas' QuickSwitch® family of high-speed bus switches, designed specifically for zero-delay, low-noise signal routing in video, audio, graphics, and hot-plug interface applications.

FAQ

What is the maximum operating voltage for QS32390QG?

The QS32390QG 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 DC, enabling robust handling of transient undershoot and overvoltage events without latch-up or damage - a key requirement in hot-swap and mixed-voltage systems where the QS32390QG is deployed.

Does QS32390QG support bidirectional signal flow?

Yes, the QS32390QG supports true bidirectional signal flow with no inherent diode path to V_CC. Each of its 16 switch channels operates identically in either direction, allowing signals to pass from Bus A to AB, AB to A, Bus B to AB, or AB to B - essential for applications like graphics memory interleaving and USB 2.0 data line switching where direction reversibility is mandatory for the QS32390QG.

What is the purpose of the 25Ω resistors in QS32390QG?

The QS32390QG integrates 25Ω resistors internally to suppress signal reflections in high-speed transmission lines, particularly in video and graphics applications with characteristic impedances near 50–75 Ω. These resistors reduce the need for external series termination, simplifying PCB layout and improving signal integrity without adding components - a design advantage confirmed in the QS32390QG datasheet's functional description and application notes.

Can QS32390QG be used for voltage translation between 5V and 3.3V logic?

Yes, the QS32390QG is explicitly specified for voltage translation between 5V and 3.3V logic domains. Its control inputs accept 2.0 V minimum VIH and 0.8 V maximum VIL under 5V V_CC, while its pass voltage (V_P) is guaranteed at 3.7–4.2 V when V_CC = 5 V and I_OUT = –5 µA - enabling reliable interfacing of 3.3V devices to 5V buses without level-shifter ICs, as documented in the QS32390QG application section.

Is QS32390QG qualified for industrial temperature operation?

Yes, the QS32390QG is fully characterized and guaranteed for operation across the industrial temperature range of –40°C to +85°C, with all electrical specifications (including R_ON, t_PLH, VIH/VIL, and leakage currents) validated under these conditions. This qualification is explicitly stated in the device marking, ordering information (Temp Grade "I"), and DC/AC electrical characteristics tables of the official QS32390QG datasheet.