Diodes Incorporated PI74LPT16374AV

Overview

PI74LPT16374AV from Pericom Semiconductor is a 16-bit 3-state register with dual 8-bit register organization, 3.3V supply operation, 5V-tolerant inputs/outputs, ±24 mA output drive, and industrial temperature range (–40°C to +85°C). It functions as a level-translating data latch in mixed-voltage bus interfaces between 3.3V logic and legacy 5V systems.

For engineers reviewing the PI74LPT16374AV datasheet, PI74LPT16374AV pinout, PI74LPT16374AV application, or PI74LPT16374AV equivalent, key selection criteria include 5V-tolerant I/O capability, low ground bounce, hysteresis on all inputs, 7.0 ns max clock-to-output propagation delay, and compatibility with LCX™/LVT™ families in high-noise industrial backplanes.

Technical Context

The PI74LPT16374AV implements two independent 8-bit D-type flip-flop banks sharing buffered clock (xCLK) and active-low 3-state enable (xOE) controls - enabling flexible 8-bit or 16-bit register operation. Its input hysteresis (150 mV) and 5V-tolerant I/O structure allow direct interfacing with both 3.3V CMOS and 5V TTL signal sources without external level shifters.

It uses advanced low-power CMOS fabrication to achieve quiescent current ≤10 µA and dynamic supply current of 2.1–4.7 mA at 2.5 MHz with all 16 bits toggling. Output skew is guaranteed ≤0.5 ns across same-package outputs, supporting tight timing margins in synchronous data capture applications.

Key Specifications

Pinout & Package

PI74LPT16374AV is packaged in a 48-pin 300-mil wide plastic SSOP (Package Code V), featuring distributed VCC/GND pins and multiple center ground connections to minimize switching noise and ground bounce.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit 3-state register applications.

Compared with SN74LVC16374ADGGR and 74ALVC16374PAG, PI74LPT16374AV uniquely supports full bidirectional 5V-tolerant I/O without external components, making it optimal for mixed-voltage bus bridging where output drive into 5V loads is essential.

Availability

PI74LPT16374AV is available at Aetrix Electronics and suitable for industrial backplane interface, telecom line card buffering, and automated test equipment requiring stable component supply and long-term lifecycle support.

Supply support for PI74LPT16374AV 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 was a fabless provider of high-performance interface, timing, and signal integrity solutions, acquired by Diodes Incorporated in 2016; its portfolio continues under Diodes' Signal Integrity Solutions division.

The PI74LPT16374AV belongs to Pericom's LPT (Low Power Tolerant) family, engineered specifically for voltage-translation and noise-immune data latching in mixed-signal industrial and telecom infrastructure.

FAQ

What is the maximum clock frequency supported by PI74LPT16374AV?

The device does not specify a maximum clock frequency limit in its datasheet. Instead, timing is governed by minimum pulse width (5.0 ns for LPT16374C grade) and setup/hold requirements (2.0 ns setup, 1.5 ns hold). At 3.3V supply and 25°C, typical operation exceeds 100 MHz in well-terminated systems with controlled trace impedance and low-skew clock distribution.

Can PI74LPT16374AV drive a 50 Ω transmission line directly?

Yes - its ±24 mA output drive capability allows direct termination into 50 Ω loads with <1 V undershoot/overshoot under standard PCB conditions. For best signal integrity, use series source termination at the driver and maintain controlled-impedance routing; the low ground bounce design further supports clean edge fidelity in multi-load configurations.

Is PI74LPT16374AV pin-compatible with standard 74-series 16-bit registers?

No - it follows Pericom's proprietary double-density pinout optimized for noise reduction (multiple GND/VCC pins), differing from industry-standard 74LVC16374 or 74ALVC16374 layouts. Pin mapping matches Pericom's LPT family (e.g., PI74LPT16244, PI74LPT16373), not generic 74xx footprints. Mechanical compatibility requires verification against SSOP-48 (V) land pattern per JEDEC MO-118B/AA.

Does PI74LPT16374AV require external pull-up or pull-down resistors on xOE or xCLK?

No - all inputs feature built-in hysteresis (150 mV) and TTL-compatible thresholds, allowing direct connection to FPGA GPIO or microcontroller outputs without biasing. However, for unused inputs (e.g., unconnected xOE), tie to VCC or GND to prevent floating states that increase ICC and risk metastability.