Diodes Incorporated PI74LPT16244AV

Overview

PI74LPT16244AV from Pericom Semiconductor is a 16-bit, 3.3V non-inverting buffer/line driver with quad-nibble/dual-byte/16-bit configurable 3-state control, ±24 mA balanced output drive, 5V-tolerant inputs, and operation over –40°C to +85°C. It serves as a level-translating bus driver in mixed-voltage memory and on-board bus systems.

For engineers reviewing the PI74LPT16244AV datasheet, PI74LPT16244AV pinout, PI74LPT16244AV application, or PI74LPT16244AV equivalent, key selection criteria include 3-state enable timing (tPZH/tPHZ ≤ 7.0 ns), low ground bounce design, 5V-tolerant I/O compatibility, and TSSOP-48 package mechanical fit for high-density PCB layouts.

Technical Context

The PI74LPT16244AV implements four independent 4-bit groups, each with dedicated active-low 3-state enable (1OE–4OE), enabling flexible bus segmentation. Its CMOS input structure includes hysteresis for noise immunity, while outputs use balanced push-pull stages delivering symmetrical ±24 mA sink/source into 50 Ω loads.

It supports mixed-signal translation: inputs accept 3.3 V or 5.0 V logic levels without external biasing, and outputs drive either 3.3 V buses or 5 V-tolerant terminated lines. Propagation delay (1.5–5.2 ns) and output skew (≤0.5 ns) are specified at CL = 50 pF and RL = 500 Ω, targeting high-speed memory address/data bus applications.

Key Specifications

Pinout & Package

Package: 48-pin 240-mil wide thin shrink small-outline package (TSSOP-A), Pb-free and RoHS-compliant, with distributed V_CC/GND pins and multiple center GND pins to minimize switching noise.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit buffer/level translation applications.

Compared with SN74LVC16244ADGGR and 74ALVC16244PW, the PI74LPT16244AV uniquely combines 5 V-tolerant I/O, input hysteresis, and ultra-low output skew (≤0.5 ns), making it optimal for timing-critical, mixed-voltage industrial memory and control bus applications.

Availability

PI74LPT16244AV is available at Aetrix Electronics and suitable for DDR memory bus interface, industrial PLC backplane driver, and embedded CPU local bus extender applications requiring stable component supply and long-term industrial lifecycle support.

Supply support for PI74LPT16244AV 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, later acquired by Diodes Incorporated in 2016; its legacy portfolio remains widely deployed in industrial and computing infrastructure.

The PI74LPT16244AV belongs to Pericom's LPT (Low Power TTL-compatible) family, engineered specifically for high-speed, low-noise bus driving in mixed-voltage memory and control subsystems where signal fidelity and EMI control are critical.

FAQ

Is PI74LPT16244AV pin-compatible with standard 16-bit buffer ICs?

Yes - it uses industry-standard double-density 48-pin TSSOP pinout (package code A), matching pin-for-pin with devices like 74LVC16244 and 74ALVC16244. All 16 inputs (xA0–xA3), 16 outputs (xY0–xY3), four OE controls (1OE–4OE), and distributed V_CC/GND pins align identically, enabling direct replacement in existing layouts without redesign.

Can PI74LPT16244AV operate with a 2.5 V supply?

No - its absolute minimum supply voltage is 2.7 V per DC electrical specifications. Operation below 2.7 V risks undefined logic states, increased propagation delay, and failure to meet guaranteed output drive or timing specs. The device is characterized and specified only for 2.7 V to 3.6 V operation.

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

The PI74LPT16244AV is characterized for CL = 50 pF and RL = 500 Ω, with propagation delay and skew guaranteed under those conditions. While it can drive higher capacitance (e.g., >100 pF) with reduced edge rate, signal integrity degrades beyond 50 pF without proper termination; for >75 pF loads, controlled-impedance routing and source-series termination are recommended.

Does PI74LPT16244AV support hot insertion or live bus swapping?

No - it lacks powered-off protection circuitry such as I_OFF isolation or IOFF specification. When V_CC = 0 V, input/output leakage is ±100 µA (per datasheet), insufficient to prevent bus contention or back-powering during hot plug events. Use only in statically powered systems or with external hot-swap controllers.