Diodes Incorporated PI3C34X245BE

Overview

PI3C34X245BE from Pericom Semiconductor is a 2.5V/3.3V, 32-bit, 2-port bus switch with 5 Ω on-resistance, near-zero propagation delay (0.25 ns), 5V I/O tolerance, and >400 MHz bandwidth-used in high-speed memory and processor interconnect switching where hot insertion and ground-bounce-free signal routing are critical.

For engineers reviewing the PI3C34X245BE datasheet, PI3C34X245BE pinout, PI3C34X245BE application, or PI3C34X245BE equivalent, key selection criteria include bus enable timing (1.5–9.8 ns disable time), 80-pin BQSOP package compatibility, 5V-tolerant I/O for mixed-voltage systems, and low-capacitance switching (COFF = 5.0 pF) in high-bandwidth digital backplanes.

Technical Context

This device implements a dual-rail, bidirectional analog bus switch architecture with four independent bus-enable controls (BE1–BE4), each managing eight 2-port switch pairs. Each switch path exhibits matched R_ON (5–15 Ω) and low OFF-state capacitance (5.0 pF), enabling minimal signal distortion across differential and single-ended high-speed buses.

It operates without internal logic or level-shifting circuitry-signal integrity relies solely on passive FET conduction. The 5V I/O tolerance is achieved via integrated clamp diodes (VIK = –0.73 V), supporting hot-swap operation while maintaining rail-to-rail voltage pass-through from A to B ports under 2.5V or 3.3V supply.

Key Specifications

Pinout & Package

The PI3C34X245BE is housed in an 80-pin, 150-mil wide plastic BQSOP (Package Code: B), Pb-free and RoHS-compliant, with 0.5 mm lead pitch and 5° lead form angle per JEDEC MO-154C.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74CBT3245APWR and NB3N551MNR2G, the PI3C34X245BE uniquely combines 32-bit density, 5 V I/O tolerance, hot-swap capability, and sub-0.3 ns delay in a single package-making it optimal for high-reliability, mixed-voltage backplane switching where signal transparency is mandatory.

Availability

PI3C34X245BE is available at Aetrix Electronics and suitable for memory interconnect switching, processor debug multiplexing, hot-swappable backplane modules, and PCIe Gen2 lane reconfiguration requiring stable component supply and long-term industrial lifecycle support.

Supply support for PI3C34X245BE 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 (acquired by Diodes Incorporated in 2016) specialized in high-speed interface, timing, and signal-integrity solutions for computing, communications, and industrial markets.

The PI3C34X245 belongs to Pericom's high-bandwidth bus switch product line, engineered specifically for transparent, low-distortion signal routing in live-insertion and mixed-voltage digital systems.

FAQ

What is the maximum operating temperature range for the PI3C34X245BE?

The PI3C34X245BE is rated for ambient operation from –40°C to +85°C with power applied. Its storage temperature range extends from –65°C to +150°C. Thermal derating is not required within the specified ambient range, and the device maintains full DC and switching specifications across this interval per its datasheet characterization.

Can the PI3C34X245BE be used with 1.8 V logic signals?

No-the PI3C34X245BE requires a 2.5 V or 3.3 V V_CC supply and does not support 1.8 V operation. While its I/O pins tolerate up to 5 V, input thresholds (VIH = 2.0 V min, VIL = 0.8 V max) are defined relative to V_CC, making reliable 1.8 V logic recognition impossible without external level translation.

How many independent bus-enable controls does the PI3C34X245BE provide?

The PI3C34X245BE provides four independent active-low bus-enable inputs: BE1, BE2, BE3, and BE4. Each controls a distinct 8-bit segment (e.g., BE1 manages A0–A7/B0–B7), allowing granular isolation of sub-buses without affecting other channels-critical for partial reconfiguration in large parallel interfaces.

Is the PI3C34X245BE pin-compatible with any industry-standard bus switches?

No-the PI3C34X245BE uses a proprietary 80-pin BQSOP footprint with unique pin mapping (e.g., distributed V_CC/GND and grouped BE controls) and is not mechanically or functionally pin-compatible with standard 24-, 48-, or 56-pin bus switches such as the 74CBT or SN74LVC series. Layout redesign is required for substitution.