Diodes Incorporated PI5C32X384BE

Overview

PI5C32X384BE from Pericom Semiconductor is a 20-bit, 2-port CMOS bus switch with four independent bus enable controls (BEX), 5Ω typical on-resistance, near-zero propagation delay (0.25 ns), and ultra-low quiescent current (0.1 µA typical). It enables direct A/B bus connection in notebook memory expansion, PCI Express lane routing, and low-power I/O multiplexing applications.

For engineers reviewing the PI5C32X384BE datasheet, PI5C32X384BE pinout, PI5C32X384BE application, or PI5C32X384BE equivalent, key selection criteria include per-group bus enable control granularity, 5V-tolerant I/O, sub-1µA standby power, and TSSOP/BQSOP package compatibility with high-density PCB layouts.

Technical Context

The PI5C32X384BE implements four independent 5-bit bidirectional switch blocks-two for A19–A15/B19–B15 and A4–A0/B4–B0 (upper/lower halves of Bus A/B), plus two for A14–A10/B14–B10 and A9–A5/B9–B5-each controlled by dedicated active-low BE pins (BEA, BEB, BEC, BED). No internal logic or level translation is performed; signal integrity relies solely on low R_ON and minimal parasitic capacitance.

It operates over –40°C to +85°C ambient, supports V_CC = 4.5–5.5 V, tolerates input/output voltages from –0.5 V to +7.0 V, and delivers <0.25 ns intrinsic propagation delay due to its passive FET-switch architecture-making it suitable for high-speed, low-latency interconnect where timing predictability is critical.

Key Specifications

Pinout & Package

PI5C32X384BE is packaged in a Pb-free & Green-compliant 48-pin BQSOP (150-mil wide), with 0.5 mm lead pitch and 3.8 mm × 10.0 mm body dimensions. Pin layout supports dual-row, fine-pitch routing for compact system designs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 20-bit bus switch applications.

Compared with PI5C32X384A and SN74CBT3244PWR, the PI5C32X384BE uniquely combines 20-bit concurrency, 5V-tolerant I/O, sub-1µA quiescent draw, and per-5-bit enable granularity-making it irreplaceable for high-integration, low-power, mixed-voltage bus routing.

Availability

PI5C32X384BE is available at Aetrix Electronics and suitable for notebook memory expansion, PCIe lane multiplexing, industrial I/O consolidation, and legacy peripheral bridging requiring stable component supply and long-term lifecycle support.

Supply support for PI5C32X384BE 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 signal integrity solutions, acquired by Diodes Incorporated in 2016; its legacy timing, switching, and signal conditioning products remain widely deployed in computing and industrial systems.

The PI5C32X384BE belongs to Pericom's PI5Cxx family of low-R_ON CMOS bus switches, designed specifically for low-latency, low-power, bidirectional signal routing in space-constrained portable and embedded platforms.

FAQ

What is the maximum operating voltage for PI5C32X384BE I/O pins?

The PI5C32X384BE supports input and output voltages from –0.5 V to +7.0 V, independent of V_CC. This allows safe interfacing with 3.3 V, 5 V, and even legacy 6.5 V logic families without level shifters or clamping diodes.

Does PI5C32X384BE require external pull-up or pull-down resistors on BE pins?

No. The BE inputs have built-in hysteresis (5–7 mV) and guaranteed logic thresholds (V_IL ≤ 0.8 V, V_IH ≥ 2.0 V), allowing direct connection to standard CMOS or TTL outputs without external biasing components.

Can PI5C32X384BE be used in hot-swap applications?

Yes. Its –0.5 V to +7.0 V I/O rating, high-impedance OFF-state (6 pF), and absence of internal ESD protection diodes to V_CC make it suitable for hot-plug scenarios-provided external series resistors and TVS devices are used per system-level safety requirements.

Is there a pin-compatible replacement for PI5C32X384BE after Pericom's acquisition?

Diodes Incorporated does not offer a direct pin- and function-compatible successor. The PI5C32X384BE remains actively distributed with full datasheet and packaging documentation; no functional migration path has been announced by Diodes for this specific 20-bit, quad-enable variant.