Diodes Incorporated PI5C3390QE

Overview

PI5C3390QE from Pericom Semiconductor is a 16:8 multiplexer/demultiplexer bus switch with 5 Ω on-resistance, near-zero propagation delay (0.25 ns typical), and ultra-low quiescent current (0.2 μA typical), designed for high-speed logic signal routing in notebook and portable computing systems where bus isolation and direct connection without added delay are critical.

For engineers reviewing the PI5C3390QE datasheet, PI5C3390QE pinout, PI5C3390QE application, or PI5C3390QE equivalent, key selection factors include verified 5 Ω R_ON, sub-nanosecond enable/disable timing (t_PZH/t_PHZ ≤ 6.5 ns), dual active-low bus enables (AEN/BEN), QSOP-28 package compatibility, and support for 5 V ±5% operation with ±120 mA output drive capability.

Technical Context

The PI5C3390QE implements a dual 8-channel analog bus switch architecture with independent AEN and BEN control inputs, enabling selective connection of either Bus A or Bus B to common Bus C-or both simultaneously-via TTL-compatible logic levels. Its zero-delay switching relies on low-R_ON MOSFET pass gates rather than buffered logic, eliminating added propagation latency.

It operates across –40°C to +85°C ambient with 5 V supply, supports bidirectional signal flow on all I/O pins (A0–A7, B0–B7, C0–C7), and maintains high-impedance isolation (I_OZ ≤ ±1 μA) when disabled-critical for minimizing bus contention and capacitive loading in multi-drop digital systems.

Key Specifications

Pinout & Package

Package: 28-pin QSOP (150-mil wide), Pb-free & Green compliant (E suffix).

Key Features

Applications

Equivalent & Alternatives

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

Compared with PI5C32390QE and SN74CBT3384CDW, the PI5C3390QE uniquely delivers 5 Ω R_ON in a single 28-pin QSOP with dual independent enables-enabling compact, low-loss, and dynamically configurable 16:8 bus routing unattainable with alternatives.

Availability

PI5C3390QE is available at Aetrix Electronics and suitable for high-speed notebook memory expansion, PCIe lane multiplexing, industrial PLC I/O isolation, and automated test equipment signal routing requiring stable component supply, RoHS-compliant packaging, and long-term lifecycle support.

Supply support for PI5C3390QE 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

Pericom Semiconductor was a fabless provider of high-speed interface and timing solutions, acquired by Diodes Incorporated in 2016; its legacy bus switch portfolio remains widely deployed in computing and industrial designs.

The PI5Cxxx series targets low-latency, low-power digital bus switching-specifically engineered for notebook, telecom, and test equipment applications demanding direct analog pass-through without buffering or delay.

FAQ

What is the maximum operating voltage for PI5C3390QE?

The PI5C3390QE is rated for V_CC = 4.75 V to 5.25 V under normal operation, with absolute maximum supply voltage of +7.0 V. Exceeding 5.25 V risks violating DC electrical specifications including R_ON stability and VIH/VIL thresholds, and may accelerate parametric drift over temperature and lifetime.

Can PI5C3390QE be used with 3.3 V logic systems?

No-PI5C3390QE is specified only for 5 V operation (V_CC = 5 V ±5%). Its VIH minimum is 2.0 V, but internal switch threshold and R_ON performance are characterized exclusively at 4.75–5.25 V. Using it with 3.3 V rails results in undefined R_ON, degraded noise margin, and potential failure to meet t_PZH/t_PHZ specs.

Does PI5C3390QE support hot-swap or live-insertion?

Yes-the device features powered-off protection: when V_CC = 0 V, all I/O pins (A0–A7, B0–B7, C0–C7) present high-impedance (I_OZ ≤ ±1 μA) and tolerate input voltages from –0.5 V to +7.0 V, preventing back-drive damage during hot-plug sequences in modular backplane systems.

How does PI5C3390QE differ from PI5C32390QE in PCB layout?

Both share identical 28-pin QSOP footprint and thermal pad design, but PI5C32390QE's 25 Ω R_ON requires no external termination resistors for impedance matching, whereas PI5C3390QE's 5 Ω R_ON may necessitate series or parallel termination depending on trace Z₀ and load to suppress reflections above ~200 MHz.