Renesas IDTQS3390SOG

Overview

IDTQS3390SOG from Renesas Electronics (formerly IDT) is a high-speed CMOS 16:8 bidirectional multiplexer switch with 5 Ω ON resistance, zero propagation delay, and industrial temperature range (–40°C to +85°C). It enables lossless signal routing between two 8-bit buses (A/B) and a common 8-bit bus (AB), supporting video/audio switching, hot-swap interfaces, and 5V-to-3.3V voltage translation.

For engineers reviewing the IDTQS3390SOG datasheet, IDTQS3390SOG pinout, IDTQS3390SOG application, or IDTQS3390SOG equivalent, key selection criteria include guaranteed 5 Ω switch R_ON, sub-0.25 ns propagation delay contribution, undershoot clamp diodes on all I/Os, QSOP-28 package compatibility, and industrial-grade thermal performance.

Technical Context

The IDTQS3390SOG implements a dual-bus 16:8 multiplexer/demultiplexer using enhanced N-channel FET switches with no inherent body diode to V_CC, enabling true bidirectional signal flow without DC blocking. Its architecture eliminates ground bounce and propagation delay by avoiding logic gates-signal path is direct metal-to-metal conduction when enabled.

Control is managed via two independent enable inputs (AEN, BEN) that select source bus A, bus B, both, or none-supporting flexible routing modes including A→AB, B→AB, A+B→AB, and high-impedance isolation. All switch and control pins integrate undershoot clamp diodes for robust ESD and hot-swap transient protection.

Key Specifications

Pinout & Package

Package: 28-pin QSOP (Quarter Size Outline Package), 3.9 mm width, RoHS-compliant green variant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed analog multiplexer applications.

Compared with SN74CBT3390PWR and PI3CH480QS, the IDTQS3390SOG uniquely integrates undershoot clamp diodes on all pins and guarantees –0.5 V absolute minimum input voltage-critical for uncontrolled hot-swap environments where TI and Diodes parts require supplemental protection circuitry.

Availability

IDTQS3390SOG is available at Aetrix Electronics and suitable for video switching, hot-swap backplane interfaces, and mixed-voltage embedded systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for IDTQS3390SOG 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 trusted embedded solutions for automotive, industrial, infrastructure, and IoT applications.

The IDTQS3390SOG belongs to Renesas' legacy QuickSwitch® analog switch portfolio, designed specifically for high-fidelity, zero-delay signal routing in real-time video, audio, and hot-plug-sensitive systems.

FAQ

What is the maximum signal frequency supported by the IDTQS3390SOG?

The IDTQS3390SOG does not specify a hard frequency limit but supports signals up to ≥20 MHz based on its 7 pF off-state capacitance and 5 Ω R_ON, yielding an RC time constant of ~35 ps. Measured propagation delay contribution is <0.25 ns, making it suitable for pixel clocks in VGA and SVGA video systems and I²S audio data streams.

Does the IDTQS3390SOG require external pull-up or pull-down resistors on AEN/BEN?

No, the IDTQS3390SOG has no internal pull resistors on AEN or BEN; external biasing is required for deterministic enable states. The control inputs exhibit ±1 μA leakage (I_IN), so 10–100 kΩ pull-up/down resistors to V_CC or GND ensure reliable logic levels in floating or high-impedance drive scenarios.

Can the IDTQS3390SOG be used for 3.3V-only systems?

Yes-the IDTQS3390SOG operates with V_CC = 5 V ±5%, but its I/O pins tolerate –0.5 V to +7 V regardless of supply. When interfacing 3.3 V logic, the device functions as a passive translator: 3.3 V signals pass through with no level shift needed, and clamp diodes protect against overshoot beyond V_CC +0.5 V.

How does the IDTQS3390SOG handle simultaneous AEN and BEN assertion?

When both AEN and BEN are low (active), the IDTQS3390SOG connects both A0–A7 and B0–B7 to AB0–AB7 simultaneously. This creates a wired-OR configuration-appropriate for bus arbitration or redundant signal merging-but requires external current limiting if A and B drivers may conflict.

Is the IDTQS3390SOG pin-compatible with earlier IDT QS3390 variants?

Yes-the IDTQS3390SOG is a green, RoHS-compliant revision of the original IDTQS3390 in QSOP-28. Pinout, electrical specs, and functional behavior match the legacy part exactly; only packaging and halogen content differ per the October 2014 revision noted in the datasheet.