Diodes Incorporated PI3B16232A

Overview

PI3B16232A from Diodes Incorporated is a 3.3 V synchronous 16-bit to 32-bit FET mux / demux bus switch originally associated with the Pericom PI3B NanoSwitch logic family. It routes a 16-bit A-side bus to selectable B-side bus paths using low-resistance pass switches and clocked control logic.

For engineers reviewing the PI3B16232A datasheet, PI3B16232A pinout, PI3B16232A application, or PI3B16232A equivalent, this device is most relevant for 3.3 V digital bus multiplexing, synchronous bus expansion, processor and peripheral bus routing, memory-interface signal steering, test-path selection, and legacy logic-board repair requiring near-zero propagation delay, 5 Ω class switch paths, 150 MHz clock capability, and 56-pin TSSOP assembly.

Technical Context

PI3B16232A uses FET pass-switch channels rather than conventional logic gates to connect or isolate bus paths. The low on-resistance switch structure lets digital signals pass between the A bus and selected B-side connections with very small added propagation delay, so the system timing impact is mainly the RC effect of switch resistance and load capacitance.

The device is synchronous because S0, S1, CLK, and CLKEN define when the routing state changes. This is useful in wide-bus systems where uncontrolled asynchronous switching could cause invalid bus states. When CLKEN holds the last state, the bus connection remains latched, allowing the controller to update select lines without immediately changing the external bus path.

Key Specifications

Pinout & Package

PI3B16232A uses a 56-pin 240 mil TSSOP package. The pinout includes sixteen A-side bus pins, two groups of sixteen B-side bus pins, VCC, GND, S0, S1, CLK, CLKEN, and internal gate-control related pins. Because this is a dense legacy wide-bus switch, footprint and pin mapping should be checked carefully before replacement on an existing PCB.

Key Features

• 3.3 V synchronous 16-bit to 32-bit FET mux / demux bus switch.
• Low-resistance 5 Ω class switch connections between bus paths.
• Near-zero pass-switch propagation delay for timing-sensitive digital routing.
• S0 and S1 select inputs control the active bus path.
• CLK and CLKEN provide synchronized switching and last-state hold behavior.
• 150 MHz clock-capable control operation.
• 56-pin 240 mil TSSOP package for wide digital buses.
• Useful for legacy processor, peripheral, memory, and test-bus routing designs.

Applications

Equivalent & Alternatives

When evaluating PI3B16232A equivalent devices, engineers should compare bus width, synchronous control logic, 3.3 V supply compatibility, on-resistance, clock timing, package footprint, select truth table, and whether the existing PCB depends on the 56-pin 240 mil TSSOP pin arrangement.

Quality

PI3B16232A should be sourced as original Diodes Incorporated / Pericom wide-bus switch components through traceable and controlled supply channels. Quality verification procedures may include TSSOP package inspection, top-mark review, lead coplanarity inspection, solderability testing, moisture sensitivity handling review, VCC-to-GND leakage screening, basic continuity checks, control-input response testing, and incoming inspection suited to legacy logic IC procurement.

Availability

PI3B16232A is available at Aetrix Electronics and suitable for processor bus routing, memory bus selection, peripheral path switching, diagnostic bus access, test fixtures, communication boards, and legacy digital systems requiring stable support for a 3.3 V synchronous FET mux / demux bus switch.

Supply support may include scheduled delivery planning, volume procurement support, BOM continuity assistance, traceable sourcing management, and lifecycle availability coordination for embedded system manufacturers, repair groups, communication equipment suppliers, contract manufacturers, and legacy control-board owners.

For production deployment, confirming the 56-pin TSSOP footprint, 3.3 V supply range, S0 / S1 truth table, CLK and CLKEN timing, on-resistance, bus loading, signal direction assumptions, assembly condition, and sourcing continuity helps reduce compatibility risk.

Manufacturer

Diodes Incorporated supplies discrete, logic, analog, mixed-signal, power-management, protection, timing, and connectivity semiconductor products for consumer, computing, communications, industrial, and automotive markets. PI3B16232A belongs to the Pericom-origin PI3B bus-switch portfolio now associated with Diodes Incorporated logic and signal-switch product support.

FAQ

What is PI3B16232A used for?

PI3B16232A is used for synchronous bus switching between a 16-bit A-side bus and two 16-bit B-side bus groups. The device is useful where a 3.3 V digital system needs low-delay mux / demux routing without using conventional logic buffering on every data path.

What type of logic device is PI3B16232A?

PI3B16232A is a 3.3 V synchronous FET mux / demux NanoSwitch device. It uses low-resistance pass switches controlled by S0, S1, CLK, and CLKEN signals, allowing data flow between A pins and B1 / B2 bus paths with very low propagation delay.

What package does PI3B16232A use?

PI3B16232A uses a 56-pin 240 mil TSSOP package. The package supports the wide bus signal count required for sixteen A-side channels, two sixteen-bit B-side paths, control pins, VCC, and ground connections in a surface-mount digital logic layout.

How does PI3B16232A control data routing?

PI3B16232A uses two select inputs, S0 and S1, together with CLK and CLKEN to synchronize switching behavior. Depending on the clocked control state, the switch can disconnect the bus, connect A to B1, connect A to B2, or connect A to both B-side paths.

What supply voltage is used by PI3B16232A?

PI3B16232A operates as a 3.3 V bus switch with electrical characteristics specified across a 3.0 V to 3.6 V VCC range. This makes the part suitable for 3.3 V logic buses where low on-resistance and near-zero switch delay are more important than voltage translation.

What should be checked before replacing PI3B16232A?

Before replacing PI3B16232A, check the 56-TSSOP footprint, 3.3 V supply range, synchronous control timing, S0 / S1 logic behavior, CLK and CLKEN timing, on-resistance, bus capacitance, and whether the system depends on the device's 16-bit to 32-bit mux / demux architecture.