Diodes Incorporated PI3VT32X245-ABE

Overview

PI3VT32X245-ABE from Pericom Semiconductor is a 16-bit, 2-port low-voltage translator bus switch with dual supply-level translation (3.3V↔2.5V and 2.5V↔1.8V), 5 Ω typical ON-resistance, near-zero propagation delay (0.25 ns), and active-low bus enable control. It operates at 2.5V or 3.3V supply and is used in mixed-voltage memory/data bus interfacing between legacy and low-power subsystems.

For engineers reviewing the PI3VT32X245-ABE datasheet, PI3VT32X245-ABE pinout, PI3VT32X245-ABE application, or PI3VT32X245-ABE equivalent, key selection criteria include bidirectional level-shifting capability, sub-nanosecond signal integrity, low quiescent current (6 μA), and BQSOP-40 package compatibility with high-density PCB layouts.

Technical Context

This device implements a CMOS-based analog bus switch architecture-not a logic gate or transceiver-enabling true bidirectional voltage translation without direction control pins. Its two independent bus enable inputs (BE1, BE2) allow per-port switching control, supporting isolated data path management across A0–A15 and B0–B15 ports.

The switch operates in transparent mode when enabled: input voltage at port A appears at port B with minimal attenuation (VP = 2.1–2.7 V at 3.3 V supply; 1.6 V at 2.5 V supply), and ON-resistance remains stable across input voltage ranges (5–10 Ω at V_IN = 0 V, 18–50 Ω at V_IN = 1.3–1.7 V), ensuring predictable RC loading on driven signals.

Key Specifications

Pinout & Package

Package: 40-pin BQSOP (150-mil wide), Pb-free & Green compliant (package code B).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar bidirectional low-voltage translator bus switch applications.

Compared with SN74AVC16T245 and NTB0102, PI3VT32X245-ABE uniquely delivers 16-bit bidirectional translation without direction control, lowest R_ON, and per-port enable-making it optimal for high-integrity, low-latency parallel bus bridging in industrial and telecom infrastructure.

Availability

PI3VT32X245-ABE is available at Aetrix Electronics and suitable for memory subsystem interfacing, processor-to-peripheral bridging, and legacy system upgrades requiring stable component supply and long-term industrial availability.

Supply support for PI3VT32X245-ABE 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, timing, and signal-integrity solutions for computing, communications, and industrial markets.

The PI3VT series was designed specifically for low-latency, bidirectional voltage translation in multi-rail digital systems-targeting DDR, PCI Express, and FPGA I/O bridging where direction control overhead and propagation delay are unacceptable.

FAQ

What voltage translation combinations does PI3VT32X245-ABE support?

It supports 3.3 V ↔ 2.5 V and 2.5 V ↔ 1.8 V bidirectional translation using a single VCC supply. When VCC = 3.3 V, A/B ports translate 3.3 V inputs to ~2.5 V outputs; when VCC = 2.5 V, they translate 2.5 V inputs to ~1.8 V outputs. No external resistors or biasing required.

Can BE1 and BE2 be tied together for simultaneous port control?

Yes-BE1 and BE2 may be connected to a common control signal to enable or disable both 16-bit ports concurrently. Doing so maintains full 32-bit bus switching capability while simplifying logic design; each enable retains independent operation if needed for advanced power gating.

Is PI3VT32X245-ABE compatible with hot-swap or partial-power-down scenarios?

No-this device lacks I_OFF protection or power-off isolation. If either VCC or GND is removed while signals are present on A/B pins, latch-up or damage may occur. It must operate only within its specified absolute maximum ratings, including –0.5 V to 5.5 V DC input voltage limits.

Does the 5 Ω ON-resistance apply across the full operating temperature range?

No-the 5 Ω value is typical at V_IN = 0 V and minimum VCC. R_ON increases with input voltage (up to 50 Ω at V_IN = 1.3 V, VCC = 2.3 V) and temperature. Designers must use the worst-case R_ON values from the Electrical Characteristics table (e.g., 30 Ω max at VCC = min, V_IN = 0.8 V) for voltage-drop and timing margin analysis.