Diodes Incorporated PI3CH3253ZTAEX

Overview

PI3CH3253ZTAEX from Diodes Incorporated is a low-voltage, high-bandwidth 2-channel 4:1 analog multiplexer/demultiplexer with independent active-low enables (ENA/ENB), 500 MHz signal bandwidth, 4 Ω typical on-resistance, and rail-to-rail switching capability across 1.8V/2.5V/3.3V supplies. It serves as a high-fidelity signal routing switch in PCIe Gen3 reference clock distribution and USB 3.0 data path selection.

For engineers reviewing the PI3CH3253ZTAEX datasheet, PI3CH3253ZTAEX pinout, PI3CH3253ZTAEX application, or PI3CH3253ZTAEX equivalent, key selection criteria include sub-1 ns propagation delay, 8 kV HBM ESD rating, 1.8×2.6 mm UQFN-16 package footprint, and simultaneous dual-channel 4:1 switching with independent enable control.

Technical Context

The PI3CH3253ZTAEX implements two independent 4:1 bidirectional analog switches sharing common select lines (S0/S1) but featuring separate active-low output enables (ENA/ENB). Each channel routes one of four differential or single-ended inputs (IA0–IA3 or IB0–IB3) to its respective output (YA/YB) with no added ground bounce or propagation delay beyond RC time constant (~0.3 ns for 10 pF load).

It supports beyond-rail switching (0–5 V signal range with 3.3 V supply), I/O tolerance up to 5 V in both ON and OFF states, and operates across industrial temperature (−40°C to +85°C) with 1.8 V, 2.5 V, or 3.3 V supply. Dynamic performance includes −60 dB crosstalk and −60 dB off-isolation at 500 MHz.

Key Specifications

Pinout & Package

PI3CH3253ZTAEX is housed in a 16-pin, 1.8 × 2.6 mm UQFN (ZTA) package with wettable flanks and exposed thermal pad. Pin pitch is 0.4 mm; package is RoHS-compliant, halogen-free, and lead-free.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TMUX1574RTER and ADG732BRUZ, PI3CH3253ZTAEX uniquely delivers dual independent 4:1 switching with sub-1 ns delay and rail-to-rail operation in a 1.8×2.6 mm footprint-enabling compact, deterministic, low-jitter routing unattainable with single-channel or serially controlled alternatives.

Availability

PI3CH3253ZTAEX is available at Aetrix Electronics and suitable for PCIe Gen3 clock distribution, USB 3.0 docking stations, and LVDS display multiplexing requiring stable component supply, consistent parametric performance, and long-term industrial lifecycle support.

Supply support for PI3CH3253ZTAEX 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and ICs, specializing in high-performance analog, logic, and power management solutions for industrial, computing, and communications markets.

The PI3CH3253 belongs to Diodes' NanoSwitch™ family-designed specifically for ultra-low-latency, high-bandwidth analog signal routing in next-generation serial interface applications including PCIe, USB, and MIPI.

FAQ

What is the maximum signal voltage supported by PI3CH3253ZTAEX when powered from 1.8 V?

PI3CH3253ZTAEX supports 0–2.5 V signal swing with 1.8 V supply, verified per datasheet Section 4 (1.8 V supply electrical characteristics). Its 5 V I/O tolerance applies only in OFF state or with higher supply voltages; exceeding 2.5 V with 1.8 V VCC risks latch-up or parametric degradation.

Can ENA and ENB be tied together for synchronous dual-channel operation?

Yes-ENA and ENB may be connected to a single enable signal for simultaneous channel activation. The device's truth table confirms identical functional behavior per channel, and the 1.5 ns typical enable time ensures <100 ps skew between YA and YB transitions under matched PCB routing.

Does PI3CH3253ZTAEX require external pull-up or pull-down resistors on S0/S1 inputs?

No-S0 and S1 have CMOS-compatible input thresholds (VIH = 1.2 V min at 1.8 V supply; VIL = 0.6 V max) and ±1 μA leakage. They may be driven directly from FPGA or MCU GPIOs; external biasing is unnecessary unless floating-state prevention is required in system-level fault modes.

How does the 4 Ω on-resistance impact signal integrity at 500 MHz?

At 500 MHz, the 4 Ω R_ON interacts with typical 10 pF load capacitance to form a 0.3 ns RC time constant-well below the 2 ns rise time of PCIe Gen3 signals. Measured −60 dB crosstalk and 500 MHz −3 dB bandwidth confirm minimal amplitude loss (<0.2 dB) and phase distortion (<2°) in standard 50 Ω systems.