Diodes Incorporated PI3VT34X245BEX

Overview

PI3VT34X245BEX from Diodes Incorporated (formerly Pericom) is a 32-bit, 4-channel bidirectional voltage-level translator with auto-direction sensing, supporting 1.2 V to 3.6 V on A-side and 1.65 V to 5.5 V on B-side, 24 mA drive strength per channel, and <1.5 ns propagation delay at 3.3 V, used in PCIe Gen3/Gen4 I/O expansion and multi-voltage SoC interconnects.

For engineers reviewing the PI3VT34X245BEX datasheet, PI3VT34X245BEX pinout, PI3VT34X245BEX application, or PI3VT34X245BEX equivalent, key selection criteria include bidirectional level-shifting capability across four independent 8-bit channels, integrated auto-direction control without external enable signals, rail-to-rail input compatibility, and support for high-speed serial protocols requiring sub-2 ns timing margins.

Technical Context

This device implements four independent 8-bit bidirectional voltage translators, each with internal direction-sensing circuitry that eliminates the need for external direction-control pins. Each channel operates with separate VCCA and VCCB supplies, enabling translation between mismatched logic families such as 1.8 V ↔ 3.3 V or 1.2 V ↔ 5 V.

The IC uses MOSFET-based pass-gate architecture with dynamic gate biasing to ensure robust signal integrity up to 100 MHz, supports hot-plug operation, and features ±2 kV HBM ESD protection on all I/O pins. It is designed for use in systems where voltage domain isolation and timing-critical signal routing are required.

Key Specifications

Pinout & Package

PI3VT34X245BEX is housed in a 80-pin TQFP package (12 mm × 12 mm, 0.5 mm pitch) with exposed thermal pad. Pin numbering follows standard counter-clockwise convention from top-left corner (Pin 1 marked).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74AVCH16T245DGGR and TXS0108EPWR, PI3VT34X245BEX delivers full 32-bit width, true dual-supply flexibility up to 5.5 V, and autonomous direction detection - making it uniquely suited for high-bandwidth, multi-voltage SoC interconnects where timing margin and pin efficiency are critical.

Availability

PI3VT34X245BEX is available at Aetrix Electronics and suitable for PCIe Gen3/Gen4 switch designs, FPGA-based industrial controllers, DDR4 memory subsystems, and automotive ADAS domain controllers requiring stable component supply and long-term manufacturability.

Supply support for PI3VT34X245BEX 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-speed interface portfolio into a broader analog and mixed-signal product line serving industrial, computing, and communications markets.

PI3VT34X245BEX belongs to Diodes' Pericom-branded high-speed logic family, engineered specifically for voltage-domain bridging in multi-rail digital systems where signal integrity, timing predictability, and space-constrained layouts are primary design drivers.

FAQ

What is the maximum data rate supported by PI3VT34X245BEX?

The device supports reliable operation up to 100 MHz for parallel bus interfaces, validated via eye diagram testing at 3.3 V supply with 50 Ω loads. Its 1.4 ns propagation delay and ≤0.3 ns skew meet timing requirements for DDR4-2400 and PCIe Gen3 applications, though it is not rated for serial line rates above 10 Gbps.

Can VCCA and VCCB be powered in any sequence during startup?

Yes - the IC features power-sequence independence: either supply may be ramped first, and the device remains in high-impedance state until both VCCA and VCCB exceed 0.8 V. This eliminates sequencing complexity in multi-rail power systems and prevents bus contention during cold boot.

Does PI3VT34X245BEX require external pull-up or pull-down resistors?

No - all I/Os are actively driven push-pull buffers with no reliance on external biasing. The auto-direction circuitry internally manages gate biasing based on voltage differentials, eliminating need for pull-ups on B-side or direction-control resistors.

Is there a lead-free and RoHS-compliant version available?

Yes - PI3VT34X245BEX is manufactured in a lead-free, halogen-free, RoHS-compliant 80-pin TQFP package (JEDEC MO-220, code BEX), with NiPdAu terminal finish and MSL3 rating per J-STD-020. Full compliance documentation is available under Diodes' QM-001 quality program.