Diodes Incorporated PI3B16245AE

Overview

PI3B16245AE from Pericom Semiconductor is a 3.3V, 16-bit, 2-port bus switch (NanoSwitch™) with near-zero propagation delay (≤0.25 ns RC time constant), 5 Ω on-resistance, and dual active-low enable inputs (1BE, 2BE). It operates from 3.0V to 3.6V across –40°C to +85°C and replaces 74-series 16245 transceivers in hot-insertion-capable backplane and memory interface applications.

For engineers reviewing the PI3B16245AE datasheet, PI3B16245AE pinout, PI3B16245AE application, or PI3B16245AE equivalent, this page delivers verified electrical specs, validated TSSOP-48 pin mapping, real-world use cases in high-speed bus isolation, and confirmed drop-in alternatives for 3.3V logic-level translation and bidirectional signal routing.

Technical Context

The PI3B16245AE implements two independent 8-bit bidirectional analog switches per port, each controlled by its own enable (1BE/2BE), allowing selective connection between A-side and B-side buses without direction control pins. Its CMOS transmission-gate architecture ensures rail-to-rail input tolerance up to +5.5V on control pins regardless of VCC.

All 16 data paths exhibit matched on-resistance (typ. 5 Ω at VCC = 3.3V), low capacitance (A/B pins: 5.8 pF, control pins: 13.1 pF), and zero added propagation delay beyond intrinsic RC delay-enabling transparent signal pass-through in high-speed digital systems such as DDR memory buffers and FPGA I/O expansion.

Key Specifications

Pinout & Package

Package: 48-pin 240-mil wide thin plastic TSSOP (Pb-free & Green compliant).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit bidirectional bus switch applications.

Compared with SN74CBT16245DGGR and PI3CH485E, the PI3B16245AE delivers superior signal integrity for high-speed bidirectional buses through lower RON, lower capacitance, and true analog-switch behavior-making it optimal for DDR, backplane, and FPGA expansion where timing transparency is critical.

Availability

PI3B16245AE is available at Aetrix Electronics and suitable for backplane bus isolation, FPGA I/O expansion, DDR memory buffering, and industrial PLC I/O multiplexing requiring stable component supply and long-term lifecycle assurance.

Supply support for PI3B16245AE 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 and signal-integrity solutions for computing, communications, and industrial markets before acquisition in 2016.

The NanoSwitch™ product line was designed specifically for zero-delay, low-RON analog switching in 3.3V digital systems-targeting applications where traditional transceivers introduce unacceptable timing skew or power noise.

FAQ

What is the maximum signal frequency supported by PI3B16245AE?

The PI3B16245AE has no built-in clock or frequency limit-it supports signals up to ≥100 MHz when used with proper PCB layout (controlled impedance, minimized stubs). Its 5.8 pF pin capacitance and 5 Ω RON preserve rise/fall times below 1 ns, making it suitable for DDR-200 and parallel ATA-100 interfaces.

Can PI3B16245AE operate with 5V logic on the A/B ports?

No-the A and B port pins are not 5V-tolerant. They must remain within VCC ±0.3 V (i.e., 2.7 V to 3.9 V for 3.3V operation). Only the 1BE/2BE control inputs accept 0 V to +5.5 V; applying 5V to A/B pins risks latch-up or permanent damage.

Is PI3B16245AE pin-compatible with standard 74LVC16245?

Yes-PI3B16245AE matches the pinout of 74 series 16245 transceivers (e.g., 74LVC16245), including identical placement of VCC, GND, A/B I/O, and BE pins. However, it lacks direction-control pins (DIR), functioning instead as a bidirectional analog switch rather than a directional transceiver.

Does PI3B16245AE require external pull-up or pull-down resistors on enable pins?

No-1BE and 2BE have internal weak pull-downs (typ. 100 kΩ) ensuring default high-impedance state on power-up. External resistors are unnecessary unless specific timing or noise immunity requirements demand stronger biasing in noisy environments.