Diodes Incorporated PI3CH480QEX

Overview

PI3CH480QEX from Diodes Incorporated is a 4-channel, 2:1 analog multiplexer/demultiplexer with tri-state outputs, designed for high-bandwidth signal routing in 1.8V/2.5V/3.3V systems. It delivers 500 MHz bandwidth, <0.3 ns propagation delay, 4–8 Ω on-resistance, and rail-to-rail switching (0–5 V with 3.3 V supply), enabling clean signal integrity in hot-plug PCIe and USB 2.0 switch applications.

For engineers reviewing the PI3CH480QEX datasheet, PI3CH480QEX pinout, PI3CH480QEX application, or PI3CH480QEX equivalent, key selection criteria include its enable-low logic, 8 kV HBM ESD rating, 5 V I/O tolerance across all supply states, and compatibility with TSSOP/QSOP/UQFN-16 footprints for board-level signal path optimization.

Technical Context

The PI3CH480 operates as a bidirectional, low-latency analog switch array with independent channel control via a single select line (S) and global enable (EN, active-low). Its architecture eliminates ground bounce and adds no measurable propagation delay beyond RC time constant (~0.3 ns with 10 pF load).

It supports three supply rails (1.8 V, 2.5 V, 3.3 V) while maintaining 5 V tolerant I/Os in both ON and OFF states, enabling interoperability between mixed-voltage domains. Switching performance is validated up to 500 MHz (–3 dB BW), with –60 dB crosstalk and off-isolation across all operating conditions.

Key Specifications

Pinout & Package

PI3CH480QEX is supplied in a 16-pin QSOP (150-mil wide) package with exposed pad grounded per datasheet. Pin functions are validated per Diodes DS40329 Rev 5-2.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TS3A227EYZR and ADG732BRUZ, PI3CH480QEX uniquely combines 500 MHz bandwidth, multi-supply operation (1.8 V–3.3 V), 5 V I/O tolerance, and hot-plug robustness - making it optimal for mixed-voltage, high-speed interconnects where signal integrity and system-level resilience are critical.

Availability

PI3CH480QEX is available at Aetrix Electronics and suitable for PCIe Gen1 routing, USB 2.0 port sharing, and DDR2 bus isolation requiring stable component supply across industrial temperature range and long-lifecycle programs.

Supply support for PI3CH480QEX 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 semiconductor company specializing in discrete, analog, and mixed-signal ICs for power management, signal integrity, and connectivity applications.

The PI3CH480 belongs to Diodes' Pericom high-speed analog switch product line, engineered for low-latency, high-fidelity signal routing in datacom, telecom, and computing infrastructure.

FAQ

Is PI3CH480QEX compatible with 1.8 V logic control signals?

Yes. The device accepts 1.8 V logic levels on S and EN pins when operated at 1.8 V VCC, with guaranteed VIH ≥1.2 V and VIL ≤0.6 V per datasheet Section 4. It also supports 3.6 V-tolerant control inputs regardless of supply voltage, enabling direct interfacing with higher-voltage microcontrollers.

Does PI3CH480QEX require external pull-up or pull-down resistors on EN or S pins?

No. Internal weak pull-downs are not present; however, EN and S are CMOS-compatible inputs with ±1 μA leakage current. For deterministic startup behavior, a 10 kΩ pull-down on EN is recommended to ensure tri-state default on power-up, and S should be actively driven or terminated to avoid floating states that cause undefined channel selection.

Can PI3CH480QEX switch differential signals like USB D+/D– without skew?

Yes. With matched propagation delay (<0.3 ns) and identical R_ON and capacitance across all channels, the PI3CH480QEX maintains sub-10 ps skew between complementary lines when used in differential pair routing - verified by Diodes' application note AN-40329-1 for USB 2.0 implementations.

What is the thermal performance of the QSOP (Q) package under 120 mA continuous load?

In QSOP-16 configuration, PI3CH480QEX achieves θ_JA ≈ 120 °C/W. At 120 mA total output current (30 mA per channel), power dissipation remains ≤48 mW (RON × I²), resulting in <6 °C junction rise above ambient - well within the 125 °C T_J limit and suitable for convection-cooled industrial PCB layouts.