Diodes Incorporated PI5C32X2245BE

Overview

PI5C32X2245BE from Pericom Semiconductor is a 16-bit, 2-port bus switch with integrated 25Ω series termination resistors, designed for high-speed bidirectional data routing between two parallel buses (A0–A15 and B0–B15) in 5V systems. It features near-zero propagation delay (1.25 ns), ultra-low quiescent current (0.2 µA typical), and on-resistance of 28–48 Ω. Used in notebook memory expansion and PCI/ISA bridge interfaces where signal integrity and low power are critical.

For engineers reviewing the PI5C32X2245BE datasheet, PI5C32X2245BE pinout, PI5C32X2245BE application, or PI5C32X2245BE equivalent, key selection criteria include bus enable timing (1.5–7.5 ns enable/disable), 25Ω built-in termination eliminating external resistors, industrial temperature range (–40°C to +85°C), and Pb-free BQSOP-40 packaging compatibility with legacy QS32X245 layouts.

Technical Context

The PI5C32X2245BE implements a passive FET-based analog switch architecture with no internal logic or level-shifting-signals pass transparently when enabled. Its dual BEn control inputs allow independent activation of both 16-bit ports, and the 25Ω series resistor per path suppresses transmission-line reflections without loading the driver.

It operates strictly at 5V ±10% supply, with TTL-compatible control inputs (VIH = 2.0 V, VIL = 0.8 V), and exhibits negligible ground bounce due to absence of internal switching transients. Input capacitance is 6 pF, and on-state capacitance is 12 pF-critical for maintaining signal rise/fall times in >100 MHz bus applications.

Key Specifications

Pinout & Package

Package: 40-pin BQSOP (150-mil wide), Pb-free & Green compliant (E suffix), 0.025" pitch, body width 0.390", thermal pad optional.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit bus switch applications.

Compared with PI5C32X2245BE, PI5C32X245BE simplifies control logic at the cost of port-level flexibility, while SN74CBT16245CPAG trades termination integration for lower resistance-making the PI5C32X2245BE optimal for balanced signal integrity, power, and layout efficiency in space-constrained industrial and mobile systems.

Availability

PI5C32X2245BE is available at Aetrix Electronics and suitable for notebook memory expansion, PCI/ISA bridge isolation, docking station interconnect, and industrial PLC backplane applications requiring stable component supply across extended product lifecycles.

Supply support for PI5C32X2245BE 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 (now part of Diodes Incorporated) specialized in high-speed interface and timing solutions for computing, communications, and consumer electronics before its 2016 acquisition.

The PI5C32X2245BE belongs to Pericom's 5C-series low-voltage bus switch family, engineered specifically for 5V TTL/CMOS bus isolation with integrated termination to reduce design complexity in legacy and hybrid digital systems.

FAQ

Is PI5C32X2245BE compatible with 3.3V logic systems?

No. The PI5C32X2245BE is specified only for 5V ±10% operation (4.5V–5.5V). Its VIH minimum is 2.0V and VIL maximum is 0.8V-TTL-compatible-but it lacks 3.3V supply support, level-shifting capability, or dual-supply operation. Using it with 3.3V buses risks undriven outputs and potential latch-up.

Does PI5C32X2245BE require external pull-up or pull-down resistors on BEn?

Yes, BEn is an active-low, TTL-compatible input with no internal pull-up. A 10 kΩ pull-up resistor to VCC is recommended for default-disabled (high-Z) state during power-up or reset. Without it, floating BEn may cause unintended bus connection and signal contention.

Can PI5C32X2245BE be used in hot-swap applications?

Yes-its rail-to-rail analog switch architecture, 0.2 µA quiescent current, and –0.5V to +7.0V absolute maximum ratings on I/O pins support controlled hot-insertion. However, ensure BEn is held HIGH (disabled) until power and reference voltages stabilize, and limit inrush current with series resistance on VCC.

What is the thermal resistance (θ_JA) of the BQSOP-40 package?

Pericom's published θ_JA for the 40-pin BQSOP (package code B) is 95°C/W under JEDEC standard 2S2P board conditions (2-layer board, 2 × 2 inch copper pours). With 0.5W max power dissipation, junction temperature rise is ≤47.5°C above ambient-well within safe operating limits at +85°C ambient.