Diodes Incorporated PI74AVC164245LAAEX

Overview

PI74AVC164245LAAEX from Pericom Semiconductor is a 16-bit dual-octal noninverting bus transceiver with independent 1.5V–2.5V (VCCA) and 3.3V (VCCB) supply rails, enabling bidirectional level shifting between low-voltage logic domains and 3.3V systems. It features 3-state outputs, industrial temperature range (–40°C to +85°C), and is packaged in a Pb-free 48-pin TSSOP (A). It is used in FPGA-to-ASIC interconnects requiring voltage domain isolation.

For engineers reviewing the PI74AVC164245LAAEX datasheet, PI74AVC164245LAAEX pinout, PI74AVC164245LAAEX application, or PI74AVC164245LAAEX equivalent, key selection criteria include VCCA/VCCB rail separation, DIR/OE control referenced to VCCB, propagation delay ≤5.3 ns (VCCA=2.5V), 3-state output leakage <±10 μA, and thermal impedance of 89°C/W in TSSOP-A package.

Technical Context

This device implements two independent 8-bit transceiver sections, each with direction (DIR) and output-enable (OE) inputs referenced to VCCB (3.3V), ensuring robust control signaling across voltage domains. The A-side I/Os tolerate –0.5V to VCCA+0.5V, while B-side I/Os support –0.5V to VCCB+0.5V, enabling safe interfacing with mixed-voltage buses.

It operates asynchronously with no internal clock; data flow direction is statically controlled by DIR, and output state is managed via active-low OE. Power-up/down high-impedance behavior is ensured when OE is pulled up to VCCB, preventing bus contention during sequencing.

Key Specifications

Pinout & Package

PI74AVC164245LAAEX is housed in a 48-pin plastic 240-mil wide TSSOP (Package Code A), RoHS-compliant and Pb-free. Pin pitch is 0.5 mm; body width is 6.1 mm; total length is 12.5 mm.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar bidirectional level-shifting transceiver applications.

Compared with SN74AVCH16T245DGGR and TXB0108PWR, PI74AVC164245LAAEX provides deterministic direction control, higher drive strength, guaranteed 3-state behavior, and tighter skew-making it optimal for timing-critical, multi-drop, or arbitration-sensitive applications.

Availability

PI74AVC164245LAAEX is available at Aetrix Electronics and suitable for FPGA-to-ASIC interconnects, industrial PLC backplanes, and automotive infotainment gateways requiring stable component supply across extended product lifecycles.

Supply support for PI74AVC164245LAAEX 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 timing solutions for communications, computing, and industrial markets before its 2016 acquisition.

The PI74AVC164245LA series was designed specifically for low-voltage bidirectional bus translation in mixed-supply systems, targeting FPGA, ASIC, and microcontroller interconnects where rail isolation and timing predictability are critical.

FAQ

Can PI74AVC164245LAAEX translate between 1.8V and 5V logic?

No. VCCA is rated for 1.5V–2.5V only; applying 5V to any A-side pin exceeds the absolute maximum rating of VCCA+0.5V (≤3.0V at 2.5V VCCA). For 1.8V-to-5V translation, use a dedicated 5V-tolerant transceiver such as the 74LVC4245A with appropriate clamping.

Is a pull-up resistor required on OE pins?

Yes. To guarantee high-impedance outputs during power-up, OE must be held high via a pull-up to VCCB. The minimum resistor value is determined by the sink capability of the driving source; Pericom recommends ≥10 kΩ for standard CMOS drivers to limit current while ensuring fast release.

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

Electrical characteristics are specified at CL = 30 pF. While the device can drive higher loads, propagation delay increases linearly with capacitance-e.g., tPD rises ~0.15 ns/pF beyond 30 pF. For loads >50 pF, verify timing margins using the measured tPD vs. CL curve from Figure 1 in the datasheet.

Does PI74AVC164245LAAEX support hot-swapping?

Yes, conditionally. Its I/Os feature overvoltage-tolerant structures (–0.5V to VCC+0.5V) and ±50 mA clamp current, enabling safe insertion into powered backplanes. However, OE must be asserted high before insertion, and VCCA/VCCB sequencing must follow monotonic ramp-up to prevent latch-up.