Diodes Incorporated PI5C32160CA

Overview

PI5C32160CA from Pericom Semiconductor is a 16-to-32-bit bidirectional demultiplexing bus switch optimized for PCI Hot-Plug applications. It features 5Ω typical on-resistance, 250ps propagation delay, –1.5V undershoot protection on the A-port only, 15pF max channel on-capacitance, and operates from +4.5V to +5.5V over –40°C to +85°C.

For engineers reviewing the PI5C32160CA datasheet, PI5C32160CA pinout, PI5C32160CA application, or PI5C32160CA equivalent, key selection criteria include hot-plug-safe signal isolation, sub-nanosecond timing integrity under 50pF load, rail-to-rail logic input tolerance up to +5.5V, and TSSOP-56 packaging compatibility with legacy PCI backplane interfaces.

Technical Context

The PI5C32160CA implements a dual-path demux architecture controlled by SEL1/SEL2 inputs, enabling routing of the 16-bit A-bus to either B1 (16-bit), B2 (16-bit), or both B1+B2 (32-bit) simultaneously. Its CMOS transmission-gate design ensures bidirectional signal flow without direction control pins.

VBIAS1/VBIAS2 pins set internal bias levels for optimal switching performance across temperature and supply voltage; R_ON remains stable at 5–15Ω depending on input voltage, while I/O capacitance stays below 15pF in on-state and 6.5pF in off-state - critical for maintaining >100MHz bandwidth into 20pF loads.

Key Specifications

Pinout & Package

Package: 56-pin TSSOP (240-mil wide), Pb-free & RoHS-compliant (PI5C32160CAE variant available).

Key Features

Applications

Equivalent & Alternatives

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

Compared with PI5C32160CA, PI5C3257C offers reduced channel count and no undershoot hardening, while SN74CBT3244 lacks both VBIAS tuning and A-port protection - making PI5C32160CA uniquely suited for robust, single-package 16-to-32-bit PCI Hot-Plug demuxing.

Availability

PI5C32160CA is available at Aetrix Electronics and suitable for PCI Hot-Plug adapter cards, telecom backplane I/O hubs, and industrial control rack interfaces requiring stable component supply across extended product lifecycles.

Supply support for PI5C32160CA 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 PCI, USB, and clock products remain widely deployed in infrastructure systems.

The PI5Cxxx bus switch family targets hot-plug–enabled computing and communications platforms, delivering low-R_ON, low-C_IO, and robust transient protection in compact TSSOP packages.

FAQ

What is the maximum allowable undershoot on the B1/B2 ports?

The datasheet specifies undershoot protection only on the A-port (–1.5V). B1 and B2 ports have no clamping diodes and must be kept within –0.5V to +7.0V absolute maximum ratings. External TVS or series resistors are required if B-side transients exceed these limits.

Can VBIAS1 and VBIAS2 be tied directly to VCC?

Yes - VBIAS1 and VBIAS2 may be connected directly to VCC (within +4.5V to +5.5V range) to ensure optimal R_ON stability and minimize variation across temperature. This configuration is validated in the datasheet's DC electrical characteristics table.

Does the PI5C32160CA support 3.3V logic inputs on SEL1/SEL2?

Yes - the logic inputs (SEL1, SEL2, and all A/B pins) tolerate 0V to +5.5V regardless of VCC, including 3.3V CMOS levels. No level-shifting circuitry is needed when interfacing with 3.3V controllers driving the select lines.

Is there a recommended power-up sequencing order?

Yes - apply VCC before VBIAS1/VBIAS2 and before any signals on A/B or SEL pins. This sequence prevents undefined states and ensures proper internal bias establishment. The datasheet explicitly states this requirement in the Applications Information section.