Diodes Incorporated PI3VT34X245BE

Overview

PI3VT34X245BE from Diodes Incorporated (formerly Pericom) is a 32-bit, 4-channel bidirectional voltage-level translating bus switch with 4 independent enable controls (BE1–BE4), supporting 1.2V to 3.3V I/O translation, 5Ω typical on-resistance, and ±25mA continuous current per channel. It enables high-speed data routing in multi-voltage FPGA-to-ASIC interconnects.

For engineers reviewing the PI3VT34X245BE datasheet, PI3VT34X245BE pinout, PI3VT34X245BE application, or PI3VT34X245BE equivalent, key selection criteria include per-channel enable isolation, rail-to-rail translation capability, low propagation delay (<0.25ns), and TSSOP-80 package thermal performance in dense PCB layouts.

Technical Context

This device implements four independent 8-bit bidirectional analog switches, each controlled by a dedicated active-high enable (BE1–BE4). Each channel supports simultaneous translation between mismatched supply domains - e.g., A-side at 1.8V and B-side at 3.3V - without direction pins or level-shifting circuitry.

It uses NMOS-only pass-gate architecture with integrated charge pumps to ensure full rail-to-rail signal swing and eliminate body diode conduction. The design targets sub-1ns propagation delay, <10ps skew between channels, and supports data rates up to 500 Mbps per lane in DDR memory interface bridging applications.

Key Specifications

Pinout & Package

Package: 80-pin TSSOP (20.4 mm × 6.2 mm, 0.5 mm pitch), thermally enhanced with exposed thermal pad (EP).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar bidirectional voltage translation applications.

Compared with SN74AVCH16T245 and NXSA3245, PI3VT34X245BE uniquely delivers per-byte enable control, lowest R_ON, and thermal-pad-enhanced power dissipation - making it the only option qualified for high-density, high-speed DDR subsystem bridging.

Availability

PI3VT34X245BE is available at Aetrix Electronics and suitable for FPGA interconnects, LPDDR4 subsystems, industrial PLC backplanes, and automotive ADAS sensor hubs requiring stable component supply and long-term lifecycle support.

Supply support for PI3VT34X245BE 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

Diodes Incorporated acquired Pericom Semiconductor in 2017, integrating its high-performance interface and signal integrity portfolio into a broad analog and mixed-signal solutions offering.

The PI3VT34X245BE belongs to Pericom's VT-series ultra-low-distortion bus switches, designed specifically for high-speed, multi-voltage digital interconnects in computing, communications, and automotive electronics.

FAQ

What is the maximum data rate supported by PI3VT34X245BE?

The device supports up to 500 Mbps per data line, validated by <0.25 ns propagation delay and <10 ps channel-to-channel skew. This enables reliable operation in LPDDR4 CA bus routing and FPGA-to-ASIC high-speed links without retiming logic.

Can PI3VT34X245BE translate between 1.2V and 5V domains?

No. Its absolute maximum V_CC is 3.6V, and it is specified only for 1.2V to 3.3V bidirectional translation. Attempting 5V operation exceeds oxide breakdown limits and voids reliability guarantees.

Is the thermal pad (EP) electrically connected internally?

Yes - the exposed pad is internally tied to GND and must be soldered to a PCB thermal plane. Failure to connect it degrades thermal resistance by >60%, risking junction temperature exceedance above 85°C at full 32-bit load.

Does PI3VT34X245BE require external pull-up or pull-down resistors?

No. Its CMOS-compatible I/O structure presents high-impedance when disabled and has no internal termination. External resistors are only needed if system-level bus hold or fail-safe biasing is required - not for basic translation functionality.