Diodes Incorporated PI74AVC164245AAE

Overview

PI74AVC164245AAE from Pericom Semiconductor is a 16-bit dual-octal noninverting bus transceiver with independent 1.8–2.5V (VCCA) and 3.3V (VCCB) supply rails, enabling bidirectional level translation between low-voltage logic domains. It features 3-state outputs, industrial temperature range (–40°C to +85°C), and supports asynchronous data bus interfacing in mixed-voltage systems such as DDR memory interfaces and FPGA I/O bridging.

For engineers reviewing the PI74AVC164245AAE datasheet, PI74AVC164245AAE pinout, PI74AVC164245AAE application, or PI74AVC164245AAE equivalent, key selection considerations include VCCA/VCCB voltage domain separation, propagation delay (tPD ≤ 6.4 ns at VCCA = 2.5V), output skew (tsk(o) ≤ 3.0 ns), 3-state enable timing (tEN/tDIS), and thermal impedance (89°C/W for TSSOP package).

Technical Context

The PI74AVC164245 implements two independent 8-bit transceiver sections, each with direction control (DIR) and output-enable (OE) inputs operating at LVTTL logic levels. Its dual-supply architecture isolates A-port (1.8–2.5V) and B-port (3.3V) domains, allowing simultaneous translation in both directions without external biasing.

Output drivers are designed for 3-state operation with controlled slew rate and low ground bounce; input thresholds scale with respective VCC rails (VIH ≈ 0.65×VCCA on A port, VIH ≈ 0.65×VCCB on B port), ensuring noise-immune switching across voltage domains.

Key Specifications

Pinout & Package

PI74AVC164245AAE is packaged in a 48-pin plastic 240 mil TSSOP (package code "A"), with 0.5 mm pitch, exposed pad optional, and JEDEC MO-153 compliant footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74AVCH16T245DGGR and TXS0108EPRJR, PI74AVC164245AAE offers optimal balance of 1.8–2.5V/3.3V domain fidelity, 24 mA B-port drive, and deterministic DIR-controlled timing - making it preferred for high-reliability, mixed-voltage parallel bus systems.

Availability

PI74AVC164245AAE is available at Aetrix Electronics and suitable for DDR memory interfaces, FPGA I/O bridging, processor bus expansion, and automotive infotainment backplanes requiring stable component supply across extended temperature and mixed-voltage conditions.

Supply support for PI74AVC164245AAE 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-performance interface, timing, and signal-integrity solutions for communications and computing markets.

The PI74AVC164245 belongs to Pericom's AVC series of advanced CMOS logic devices, engineered specifically for low-voltage, high-speed bidirectional level translation in multi-rail digital systems.

FAQ

What is the recommended power-up sequence for PI74AVC164245AAE?

Apply VCCA and VCCB simultaneously or within 100 ms of each other. OE must be held high (via ≥10 kΩ pull-up to VCCB) before either supply reaches 1.0V to ensure outputs remain in high-impedance state during ramp-up. DIR may be undefined until supplies stabilize.

Can PI74AVC164245AAE operate with VCCA = 1.8V and VCCB = 3.3V simultaneously?

Yes - this is its primary operating mode. Electrical characteristics are fully specified at VCCA = 1.8V (±0.1V) and VCCB = 3.3V (±0.3V), including tPD ≤ 6.4 ns, VOH ≥ 2.4V on B-port, and VIH ≤ 1.35V on A-port, ensuring reliable signal transfer across both domains.

Is external termination required on A-port or B-port I/O lines?

No external series termination is required for typical board traces ≤10 cm. The device's controlled output impedance (~25Ω) and slew rate limit naturally dampen reflections. For longer traces or high-noise environments, 22–33Ω series resistors near drivers are recommended per JEDEC guidelines.

Does PI74AVC164245AAE support hot insertion?

It supports partial hot insertion when OE is held high and VCCA/VCCB are pre-biased to valid levels before signal connection. However, full hot-swap into live 3.3V buses requires external current-limiting or isolation circuitry, as I_OK/I_IK clamping (±50 mA) protects against short-term overstress but not sustained fault currents.