Renesas IDTQS3390SOG8

Overview

IDTQS3390SOG8 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 IDTQS3390SOG8 datasheet, IDTQS3390SOG8 pinout, IDTQS3390SOG8 application, or IDTQS3390SOG8 equivalent, key selection criteria include guaranteed 5 Ω R_ON, sub-0.25 ns propagation delay contribution, undershoot clamp diodes on all I/Os, QSOP-28 package compatibility, and TTL-compatible control logic with ±1 μA leakage.

Technical Context

The IDTQS3390SOG8 implements a dual-bus 16:8 mux/demux architecture using enhanced N-channel FETs without inherent body diodes to V_CC, enabling true bidirectional signal flow with no DC blocking. Its zero-delay operation arises from passive switch topology-no internal logic gates or latches-making it functionally distinct from clocked multiplexers.

Control is managed via two independent enable pins (AEN, BEN), allowing four states: A→AB, B→AB, A+B→AB (simultaneous), or disconnect. All 24 signal terminals (A0–A7, B0–B7, AB0–AB7) support ±0.5 V to +7 V DC voltage translation and feature integrated undershoot clamp diodes for robust ESD and hot-swap transient protection.

Key Specifications

Pinout & Package

Package: QSOP-28 (Quarter Size Outline Package), 3.9 mm × 9.9 mm body, 0.635 mm pitch, RoHS-compliant green finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74CBT3390PWR and PI3CH480QS, the IDTQS3390SOG8 uniquely combines industrial temperature rating, integrated undershoot clamps, and 7 pF off-capacitance-making it the only option qualified for ruggedized hot-swap and mixed-voltage industrial I/O expansion without supplemental protection circuitry.

Availability

IDTQS3390SOG8 is available at Aetrix Electronics and suitable for video switching infrastructure, industrial hot-swap interfaces, and 5V-to-3.3V voltage translation applications requiring stable component supply across long production lifecycles.

Supply support for IDTQS3390SOG8 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 IDTQS3390SOG8 belongs to Renesas' QuickSwitch® analog switch family, engineered specifically for zero-delay, bidirectional signal routing in mixed-voltage, hot-plug-capable systems where signal integrity and robustness are critical.

FAQ

What is the maximum signal voltage that can be safely passed through the IDTQS3390SOG8?

The IDTQS3390SOG8 supports DC signal voltages from –0.5 V to +7 V on all I/O pins (A0–A7, B0–B7, AB0–AB7), independent of V_CC. This allows safe 5 V-to-3.3V level translation and tolerance of transient undershoot events down to –0.5 V thanks to integrated clamp diodes. Operation outside this range risks permanent damage.

Does the IDTQS3390SOG8 require external pull-up or pull-down resistors on its control pins?

No, the IDTQS3390SOG8 does not require external biasing on AEN or BEN control inputs. Its TTL-compatible thresholds (V_IL ≤ 0.8 V, V_IH ≥ 2.0 V) allow direct connection to standard logic outputs. Input leakage is limited to ±1 μA, so microcontroller GPIOs or FPGA I/Os can drive these pins without added components.

Can the IDTQS3390SOG8 be used to switch analog signals such as audio or clock waveforms?

Yes, the IDTQS3390SOG8 is suitable for analog signal routing including audio and clock waveforms. Its 5 Ω R_ON, 7 pF off-capacitance, and flat frequency response up to several hundred MHz preserve signal fidelity. However, it is not specified for RF or precision ADC/DAC reference paths-use cases requiring sub-milliohm R_ON or femtofarad capacitance need specialized switches.

Is the IDTQS3390SOG8 pin-compatible with other QuickSwitch devices like the IDTQS3380?

No, the IDTQS3390SOG8 is not pin-compatible with the IDTQS3380. The IDTQS3390SOG8 is a 16:8 mux in QSOP-28, whereas the IDTQS3380 is an 8:4 device in QSOP-20. Pin counts, terminal assignments (e.g., AB0–AB7 vs AB0–AB3), and enable logic differ. Migration requires PCB redesign and firmware updates to match new pin mapping and control behavior.

What thermal derating applies to the IDTQS3390SOG8 at maximum ambient temperature?

At T_A = +85°C, the IDTQS3390SOG8 has a maximum power dissipation of 0.5 W. With typical R_ON = 5 Ω and worst-case current per channel of 120 mA, power per switch is ≤72 mW. Total active channel count must be limited to ensure junction temperature stays below 125°C-derating curves in the datasheet confirm full functionality up to 85°C ambient with standard 2-layer board copper.