Diodes Incorporated PI3B16211A

Overview

PI3B16211A from Pericom Semiconductor is a 3.3V, 24-bit hot-insertion bus switch with 5 Ω on-resistance, near-zero propagation delay, and dual 12-bit or single 24-bit configurable switching. It enables direct A-to-B signal routing in high-speed digital backplanes and modular computing systems where live card insertion must avoid bus contention.

For engineers reviewing the PI3B16211A datasheet, PI3B16211A pinout, PI3B16211A application, or PI3B16211A equivalent, key selection criteria include its 4.5 ns max switching time, 3.0–3.6 V supply range, –40°C to +85°C industrial temperature rating, and support for TSSOP-56 (240-mil) packaging with Pb-free/Green options.

Technical Context

The PI3B16211A implements two independent 12-bit bidirectional bus switches controlled by separate OE pins (1OE and 2OE), allowing selective enablement of Channel 1 (A1–A12/B1–B12) and Channel 2 (A13–A24/B13–B24). Each channel operates as a low-impedance pass gate with no internal logic or level translation.

Its architecture relies entirely on MOSFET-based transmission gates with no active buffering, resulting in propagation delay dominated solely by RC time constant (≤0.25 ns for 50 pF load). Input/output capacitance is specified at 5.8 pF (off-state) and 0.7 pF (on-state), minimizing signal integrity impact in high-frequency parallel buses.

Key Specifications

Pinout & Package

PI3B16211A is packaged in a 56-pin 240-mil wide thin plastic TSSOP (Package Code A), with 0.5 mm pitch, 7.6 mm × 10.3 mm body size, and exposed thermal pad (non-electrical).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 24-bit bus switch applications.

Compared with SN74CBT16212DGGR and PI3B3245A, the PI3B16211A uniquely delivers native 24-bit width in TSSOP-56 at 5 Ω R_ON and 4.5 ns speed-optimizing PCB area, signal integrity, and thermal performance for industrial hot-swap backplanes.

Availability

PI3B16211A is available at Aetrix Electronics and suitable for telecom line cards, modular server backplanes, and industrial PLC baseplates requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for PI3B16211A 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 was a fabless provider specializing in high-speed interface, timing, and signal-integrity solutions before its acquisition by Diodes Incorporated in 2017; legacy products maintain full datasheet compliance and long-term support.

The PI3B16211A belongs to Pericom's BusSwitch™ family, engineered specifically for hot-pluggable parallel bus architectures in telecom, computing, and industrial systems where zero-latency signal pass-through and robust ESD/insertion survivability are mandatory.

FAQ

What is the maximum continuous current per switch in PI3B16211A?

The PI3B16211A supports 120 mA DC output current per switch terminal, verified under maximum ratings with V_CC = 3.6 V and ambient temperature ≤+85°C. This rating assumes proper PCB thermal relief and avoids simultaneous conduction across all 24 switches at full current.

Does PI3B16211A require external pull-up or pull-down resistors on OE pins?

No. The 1OE and 2OE pins are CMOS-compatible active-low enables with defined logic thresholds (V_IL ≤ 0.2 V, V_IH ≥ 0.7 V_CC). They interface directly to FPGA or microcontroller GPIOs without external biasing, provided drive strength meets 1 µA leakage spec.

Can PI3B16211A be used with 2.5 V or 1.8 V logic families?

No. The PI3B16211A is strictly a 3.3 V device with V_CC range 3.0–3.6 V. Its input thresholds and on-resistance are characterized only within this range; operation below 3.0 V risks undefined switching behavior and increased R_ON, violating datasheet specifications.

Is the PI3B16211A pinout compatible with PI3B16211V or PI3B16211K?

Yes-pinout is identical across all package variants (TSSOP-A, SSOP-V, TVSOP-K). Mechanical dimensions and thermal characteristics differ, but electrical connectivity, function mapping, and PCB footprint logic remain fully interchangeable for design reuse.