Diodes Incorporated PI3B16245VE

Overview

PI3B16245VE from Pericom Semiconductor is a 3.3V, 16-bit, 2-port bus switch with near-zero propagation delay (≤0.25 ns RC time constant), 5 Ω on-resistance, and dual enable control (1BE/2BE). It functions as a hot-insertion-capable signal path selector in high-speed digital backplanes and memory interfaces, supporting bidirectional A↔B switching without added ground bounce or timing skew.

For engineers reviewing the PI3B16245VE datasheet, PI3B16245VE pinout, PI3B16245VE application, or PI3B16245VE equivalent, key selection criteria include its 3.0–3.6 V supply range, –40°C to +85°C industrial temperature rating, 4ns max switching speed, and compatibility with 74-series 16245 transceiver layouts in space-constrained TSSOP/SSOP systems.

Technical Context

The PI3B16245VE implements a CMOS-based analog bus switch architecture-no logic gates or latches-enabling true rail-to-rail signal pass-through with no propagation delay beyond intrinsic RC effects. Its two independent 8-bit switch blocks (Port A/B) are controlled by separate active-low enables (1BE, 2BE), allowing selective isolation of data lanes.

All 32 signal pins (A0–A7, B0–B7 per port ×2) operate as bidirectional I/Os with 5 Ω typical on-resistance at 3.3 V, while control inputs tolerate up to +5.5 V regardless of VCC-a critical feature for mixed-voltage system interfacing and hot-plug sequencing.

Key Specifications

Pinout & Package

Package: 48-pin, 300-mil wide plastic SSOP (V), Pb-free & Green compliant, 0.620" × 0.420" footprint, 0.025" lead pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74CBT16245DGGR and 74LVC16245APAG, the PI3B16245VE uniquely delivers zero-delay, bidirectional, 3.3 V–compatible switching-making it the only option for timing-critical hot-plug isolation where propagation delay must be eliminated, not minimized.

Availability

PI3B16245VE is available at Aetrix Electronics and suitable for high-speed memory interfacing, PCI bus isolation, and backplane signal routing requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for PI3B16245VE 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 (acquired by Diodes Incorporated in 2016) specialized in high-speed interface solutions including clock management, signal integrity, and analog switches for computing and communications markets.

The PI3B16245VE belongs to Pericom's NanoSwitch™ family-designed specifically for zero-delay, hot-pluggable signal routing in 3.3 V digital systems such as telecom backplanes, server memory subsystems, and FPGA-based prototyping platforms.

FAQ

Can PI3B16245VE operate with 5 V logic inputs while powered at 3.3 V?

Yes. Control inputs (1BE, 2BE) accept voltages from –0.5 V to +5.5 V regardless of VCC level. This allows direct connection to 5 V TTL outputs without level-shifting circuitry-verified across –40°C to +85°C and confirmed in DC Electrical Characteristics tables.

What is the maximum capacitive load this switch can drive reliably?

The PI3B16245VE maintains signal integrity up to 50 pF load capacitance, as validated by its 0.25 ns RC time constant (5 Ω × 50 pF). For loads exceeding 50 pF, rise/fall times degrade linearly-designers should simulate with actual trace and receiver capacitance using the provided switching characteristics.

Does PI3B16245VE require external pull-up or pull-down resistors on control pins?

No. The 1BE and 2BE inputs have CMOS-compatible thresholds and do not require external biasing. However, floating control pins must be avoided-tie unused enables to VCC via 10 kΩ resistors to ensure defined high-Z state during power-up or standby.

How does PI3B16245VE handle power-supply sequencing during hot insertion?

It requires VCC and GND to be established before applying any signals to A/B or control pins. Violating this sequence risks latch-up. Pericom's Application Note AN-327 specifies that sequencing controllers must assert VCC ≥2.7 V for ≥100 µs prior to enabling signals-ensuring safe hot-plug operation.