Diodes Incorporated PI3C32X245BEX

Overview

PI3C32X245BEX from Diodes Incorporated is a 16-bit, 2-port bus switch operating at 2.5V or 3.3V supply, featuring 5 Ω on-resistance, <0.25 ns propagation delay, and >400 MHz bandwidth. It enables hot insertion and hot-swapping in high-speed digital interconnects such as memory expansion buses and FPGA I/O bridging.

For engineers reviewing the PI3C32X245BEX datasheet, PI3C32X245BEX pinout, PI3C32X245BEX application, or PI3C32X245BEX equivalent, key selection criteria include 5V-tolerant I/O, rail-to-rail switching capability, low ground bounce noise, and BQSOP-40 packaging for dense PCB layouts.

Technical Context

The PI3C32X245BEX implements dual 16-bit bidirectional analog switches controlled by two independent active-low Bus Enable (BE1/BE2) inputs. Each port supports true rail-to-rail signal pass-through with no added propagation delay beyond RC time constant of 5 Ω × 50 pF ≈ 0.25 ns.

It operates across –40°C to +85°C ambient with VCC = 2.5V ±10% or 3.3V ±10%, maintains 5V I/O tolerance on all A/B pins, and delivers 120 mA max output current per channel under safe operating conditions.

Key Specifications

Pinout & Package

PI3C32X245BEX is housed in a 40-pin, 150-mil-wide plastic BQSOP (B) package with exposed thermal pad and standard lead pitch. Pin 1 is marked by notch or dot; pins 10 and 20 are GND; pins 35 and 34 are VCC; BE1 and BE2 are dedicated active-low enable controls.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74CBT16245DGGR and PI3CH485BEX, the PI3C32X245BEX uniquely supports dual 16-bit ports with independent enables, 2.5V/3.3V operation, and guaranteed 5V I/O tolerance-making it optimal for scalable, mixed-voltage interconnect architectures.

Availability

PI3C32X245BEX is available at Aetrix Electronics and suitable for memory expansion interfaces, FPGA I/O bridging, hot-swappable module backplanes, and PCIe sideband signal routing requiring stable component supply and long-term lifecycle assurance.

Supply support for PI3C32X245BEX 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 analog, logic, and power management solutions for industrial, computing, and communications markets.

The PI3C32X245 belongs to Diodes' Pericom® high-bandwidth bus switch product line, engineered specifically for low-latency, hot-pluggable digital interconnects in servers, storage systems, and programmable logic platforms.

FAQ

What is the maximum allowable load capacitance for reliable operation at 400 MHz?

The PI3C32X245BEX is characterized for CL ≤ 50 pF in switching tests, and its 10.0 pF on-state capacitance (CON) ensures stable performance up to 400 MHz with standard 50 Ω termination. For loads exceeding 50 pF, signal integrity analysis using the 5 Ω RON and measured CON/CIN values is recommended to verify rise/fall time degradation.

Can BE1 and BE2 be tied together for single-enable operation?

Yes-BE1 and BE2 may be connected to a common control signal to simplify logic interface, but doing so eliminates independent port isolation. The device will then behave as a single 16-bit bidirectional switch. No additional pull-up or pull-down resistors are required since BE inputs have CMOS-compatible thresholds.

Does the PI3C32X245BEX support partial power-down modes?

No-PI3C32X245BEX does not implement internal power-gating or standby modes. When VCC is applied and BE1/BE2 are HIGH, all switches enter high-impedance state with 5.0 pF COFF; however, quiescent current remains at 0.5–1.0 mA regardless of enable state. True zero-power disable requires external VCC gating.

Is there any risk of latch-up when connecting 5V signals to A/B pins while VCC = 2.5V?

No-latch-up is prevented by internal clamp diodes and process design. The absolute maximum rating permits DC input voltages from –0.5 V to 5.5 V on A/B pins independent of VCC. VIH/VIL thresholds remain valid at 2.0 V and 0.8 V respectively, ensuring robust logic recognition even with 5V inputs at 2.5V supply.