Diodes Incorporated PI3C3245QE

Overview

PI3C3245 from Diodes Incorporated is an 8-bit, 2-port bus switch IC operating at 2.5 V or 3.3 V supply, featuring 5 Ω on-resistance, >400 MHz bandwidth, and active-low Bus Enable (BE) control. It directly connects Bus A and Bus B signals with near-zero propagation delay (0.25 ns typical), enabling high-speed signal routing in memory expansion and hot-pluggable backplane interfaces.

For engineers reviewing the PI3C3245 datasheet, PI3C3245 pinout, PI3C3245 application, or PI3C3245 equivalent, key selection criteria include its rail-to-rail 2.5/3.3 V switching capability, 5 V I/O tolerance, hot-insertion support, and low-impedance bidirectional path for high-bandwidth digital buses.

Technical Context

The PI3C3245 implements a passive FET-based analog switch architecture with no internal logic or level-shifting circuitry-signal integrity relies solely on low R_ON (5–7 Ω) and minimal parasitic capacitance (C_ON = 10.0 pF). Its BE input controls all eight A/B pairs simultaneously in a single-pole, double-throw configuration.

It operates across –40°C to +85°C ambient, supports 5 V-tolerant I/O regardless of V_CC, and exhibits negligible ground bounce due to absence of internal charge pumps or clocked logic-making it suitable for noise-sensitive mixed-signal board interconnects.

Key Specifications

Pinout & Package

PI3C3245 is available in two RoHS-compliant, lead-free plastic packages: 20-pin TSSOP (173 mil wide, code L) and 20-pin QSOP (150 mil wide, code Q).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74CBT3245APWR and 74LVC245ABQ, the PI3C3245 uniquely supports native 2.5 V operation, delivers superior bandwidth (>400 MHz vs. ≤200 MHz), and provides true bidirectional, zero-delay switching-critical for high-speed memory and clock distribution where signal fidelity and timing predictability are non-negotiable.

Availability

PI3C3245 is available at Aetrix Electronics and suitable for memory expansion interfaces, hot-pluggable backplanes, PCIe reference clock distribution, and multi-processor interconnects requiring stable component supply and long-term industrial availability.

Supply support for PI3C3245 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 integrated circuits, specializing in high-performance, energy-efficient solutions for automotive, industrial, and computing markets.

The PI3C3245 belongs to Diodes' high-speed bus switch product line, engineered specifically for low-latency, bidirectional signal routing in memory subsystems and modular backplane architectures where signal integrity and hot-swap reliability are essential.

FAQ

Is PI3C3245 compatible with both 2.5 V and 3.3 V logic families?

Yes. The PI3C3245 operates natively at either 2.5 V or 3.3 V supply voltage, with rail-to-rail switching and guaranteed 5 V I/O tolerance on all A/B pins-enabling seamless interface between mixed-voltage domains without level shifters.

What is the maximum data rate supported by PI3C3245?

The device supports signal bandwidth exceeding 400 MHz, validated by characterization under 50 pF load and 500 Ω termination. This enables reliable operation with DDR2/DDR3 address/control buses and PCIe Gen1 reference clocks up to 100 MHz with significant timing margin.

Does PI3C3245 require external pull-up or pull-down resistors on the BE pin?

No. The BE input has CMOS-compatible thresholds (V_IL ≤ 0.8 V, V_IH ≥ 2.0 V at V_CC = 3.3 V) and draws only ±1 μA leakage current. It may be driven directly from FPGA GPIO or microcontroller outputs without external biasing components.

Can PI3C3245 be used in hot-swap applications with live backplane insertion?

Yes. Its Hi-Z state during BE deassertion, 5 V I/O tolerance, and absence of internal charge pumps prevent bus contention and latch-up during live insertion. Diodes' datasheet explicitly confirms hot-insertion capability and specifies safe power-up sequencing behavior.