Diodes Incorporated PI3B16233A

Overview

PI3B16233A from Pericom Semiconductor is a 3.3V, 16-bit to 32-bit FET mux/demux NanoSwitch™ with 5 Ω ON-resistance, 4.5 ns max propagation delay, and –40°C to +85°C industrial temperature range. It functions as two independent 8-bit-to-16-bit multiplexers or one unified 16-bit-to-32-bit switch for memory bank interleaving in high-speed digital systems.

For engineers reviewing the PI3B16233A datasheet, PI3B16233A pinout, PI3B16233A application, or PI3B16233A equivalent, key selection criteria include bidirectional low-R_ON switching, rail-to-rail logic compatibility up to 3.6 V, ultra-low quiescent current (0.2 mA typical), and TSSOP-56 packaging for dense PCB layouts.

Technical Context

The PI3B16233A implements a CMOS-based analog bus switch architecture with dual independent select control (SEL1/SEL2) and test-enable inputs (TEST1/TEST2). Its FET-based topology enables true bidirectional signal flow without direction pins or level-shifting circuitry.

All A-port signals route to either B1 or B2 ports based on SEL1/SEL2 states, and when TEST1/TEST2 are HIGH, A connects simultaneously to both B1 and B2. Input logic thresholds support TTL-compatible drive regardless of V_CC, enabling mixed-voltage system interfacing.

Key Specifications

Pinout & Package

PI3B16233A is packaged in a 56-pin 240-mil wide plastic TSSOP (Package Code A), 0.5 mm pitch, with exposed thermal pad not electrically connected.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74CBT16233DGGR and PI3CH4833A, the PI3B16233A uniquely balances 16-bit scalability, industrial temperature support, integrated test mode, and 5 Ω/4.5 ns performance-making it optimal for memory-interleaved embedded computing platforms.

Availability

PI3B16233A is available at Aetrix Electronics and suitable for memory bank interleaving, high-speed address multiplexing, notebook system bus switching, and embedded controller peripheral sharing requiring stable component supply and long-term industrial-grade availability.

Supply support for PI3B16233A 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, timing, and signal-integrity solutions for computing and communications infrastructure.

The PI3B16233A belongs to the NanoSwitch™ family-designed specifically for low-latency, low-R_ON analog bus switching in memory, processor, and FPGA interconnect applications.

FAQ

Is PI3B16233A compatible with 5 V logic inputs?

No-its logic inputs tolerate up to 3.6 V regardless of V_CC, but are not rated for sustained 5 V operation. Exceeding 3.6 V may cause reliability degradation. For 5 V-tolerant designs, consider PI3B3244 or similar 5 V–compatible bus switches.

Does PI3B16233A require external pull-up or pull-down resistors on SEL/TEST pins?

No-SEL1, SEL2, TEST1, and TEST2 have internal weak pull-downs (100 kΩ typical) and are TTL-compatible. External resistors are unnecessary unless specific noise immunity or default-state assurance is required in high-noise environments.

Can PI3B16233A be used in hot-swap applications?

Yes-its rail-to-rail input structure and sequencing tolerance allow safe operation during partial power-up. However, V_CC and GND must be established before applying signals to A/B/SEL/TEST pins to prevent latch-up or ESD damage per manufacturer guidelines.

What is the maximum capacitive load supported at 4.5 ns propagation delay?

The 4.5 ns max t_PD is specified with C_L = 50 pF and R_L = 500 Ω. At higher loads (e.g., >75 pF), propagation delay increases linearly due to RC time constant (R_ON × C_L). For 100 pF, expect ~6 ns typical delay.