Diodes Incorporated PI3B16212A

Overview

PI3B16212 from Pericom Semiconductor is a 3.3V, 24-bit bus exchange switch with 5Ω ON resistance, 5ns max switching time, and industrial temperature range (–40°C to +85°C), used for bidirectional data routing between four 12-bit ports in high-speed digital backplanes and memory interface subsystems.

For engineers reviewing the PI3B16212 datasheet, PI3B16212 pinout, PI3B16212 application, or PI3B16212 equivalent, key selection criteria include low-impedance signal path integrity, TTL-compatible control logic, absence of built-in termination, and compatibility with 56-pin TSSOP (A) or SSOP (V) PCB footprints.

Technical Context

The PI3B16212 implements twelve independent bidirectional analog switches, each controlled by a 3-bit select code (S0–S2), enabling dynamic reconfiguration of 24-bit data paths between A- and B-side buses. It operates without level shifting and requires no external biasing.

Its submicron CMOS process ensures near-zero propagation delay-limited only by RC time constant of 5Ω R_ON and load capacitance-and supports direct connection of input and output buses when enabled, eliminating signal buffering overhead in synchronous bus architectures.

Key Specifications

Pinout & Package

Available in 56-pin TSSOP (A) and SSOP (V) packages; both are 240-mil and 300-mil wide, respectively, with 0.5mm pitch and standard JEDEC-compliant footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with PI3B162212, the PI3B16212 offers lower insertion loss and greater flexibility in termination strategy; versus SN74CBT16212, it provides tighter thermal qualification and lower quiescent current-critical for sealed industrial deployments.

Availability

PI3B16212 is available at Aetrix Electronics and suitable for high-speed memory interconnects, FPGA I/O expansion, and industrial backplane switching requiring stable component supply across long production lifecycles.

Supply support for PI3B16212 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 of high-speed interface and timing solutions, acquired by Diodes Incorporated in 2016; its legacy logic portfolio remains widely deployed in industrial and communications infrastructure.

The PI3B series targets low-latency, low-distortion bus switching in 3.3V digital systems-designed specifically for applications demanding deterministic signal routing without added propagation delay or voltage translation.

FAQ

What is the maximum data rate supported by PI3B16212?

The PI3B16212 supports effective data rates exceeding 200MHz due to its 2.1ns typical propagation delay and 5Ω R_ON, enabling clean signal transitions on 24-bit buses. System-level bandwidth depends on load capacitance and driver strength, but measured eye diagrams confirm compliance with DDR2 SDRAM timing at 400MT/s when used with ≤50pF net capacitance.

Can PI3B16212 be used with 2.5V or 5V logic families?

No-PI3B16212 is specified only for 3.0V to 3.6V V_CC operation. Its control inputs (S0–S2) have TTL thresholds referenced to V_CC, and applying 2.5V or 5V violates absolute maximum ratings. For mixed-voltage systems, level translators must isolate control signals, and A/B pins must remain within V_CC ±0.5V per datasheet limits.

Does PI3B16212 require external pull-up or pull-down resistors on S0–S2?

No-S0, S1, and S2 inputs have internal weak pull-downs (100kΩ typical) ensuring defined logic states during power-up or floating conditions. External resistors are unnecessary unless specific timing or noise immunity requirements demand stronger biasing, which would require verifying against the 10µA max input leakage spec.

How does PI3B16212 differ from PI3B162212 beyond the 25Ω resistor?

PI3B162212 integrates 25Ω series resistors on every A and B pin to dampen reflections on long traces; PI3B16212 omits them, offering lower insertion loss and full design freedom for external termination. Both share identical logic, timing, packaging, and thermal specs-only the on-die resistor network differs, making them non-interchangeable without layout revision.