Diodes Incorporated PI74ALVTC16374A

Overview

PI74ALVTC16374A from Pericom Semiconductor is a 16-bit D-type flip-flop with 3-state outputs, designed for bidirectional bus driving, I/O port buffering, and working register functions in mixed-voltage systems. It operates across 1.8V–3.6V VDD, supports 3.6V I/O tolerance, delivers ±32/64mA drive strength at 3.3V, and features Bus Hold to eliminate external pull resistors - used in industrial backplane interface modules requiring level-shifted data latching.

For engineers reviewing the PI74ALVTC16374A datasheet, PI74ALVTC16374A pinout, PI74ALVTC16374A application, or PI74ALVTC16374A equivalent, key selection criteria include 3-state output timing (tPLH/tPHL ≤ 5.1ns @ VDD=3.3V), dual 8-bit or unified 16-bit configuration flexibility, I/O tolerance for 1.8V/3.3V domain interfacing, and industrial temperature support (–40°C to +85°C).

Technical Context

This device implements two independent 8-bit edge-triggered D-type flip-flops sharing common clock and output-enable controls, with each 8-bit section supporting synchronous data capture on the rising edge of CLK. The 3-state outputs are controlled by an active-low OE signal that does not affect internal latch operation, enabling data retention or update during high-impedance output states.

It integrates patented noise reduction circuitry and power-off high-impedance inputs/outputs, while Bus Hold functionality maintains last-valid input state during floating conditions. The design supports live insertion and operates with VDD as low as 1.8V, maintaining full logic functionality and drive capability across the entire 1.8V–3.6V supply range.

Key Specifications

Pinout & Package

Package: 48-pin 240-mil wide plastic TSSOP (A), Pb-free & Green compliant, 12.4mm × 6.1mm body, 0.5mm pitch.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit D-type flip-flop with 3-state output applications.

Compared with SN74ALVTH16374DGGR and 74LVC16374APAG, the PI74ALVTC16374A uniquely combines 3.6V I/O tolerance, Bus Hold, and sub-1μA quiescent current at 1.8V - making it optimal for ultra-low-power, mixed-voltage, and floating-input industrial designs where component count and signal integrity are constrained.

Availability

PI74ALVTC16374A is available at Aetrix Electronics and suitable for industrial backplane interfaces, memory-mapped I/O expansion, and hot-swappable module hubs requiring stable component supply, long-term lifecycle assurance, and Pb-free compliance.

Supply support for PI74ALVTC16374A 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, timing, and signal-integrity solutions for communications and computing infrastructure.

The PI74ALVTC family was engineered for low-voltage, mixed-domain digital interfacing - targeting industrial, telecom, and embedded systems needing robust noise immunity, live-insertion capability, and simplified board-level design.

FAQ

What is the minimum VDD required for guaranteed operation?

The PI74ALVTC16374A is fully specified down to 1.8V VDD, with DC and AC parameters validated across 1.8V–3.6V. At 1.8V, tPLH/tPHL remains ≤8.4ns, input thresholds scale to 0.6×VDD, and Bus Hold current is ±0.5μA - all meeting industrial timing and noise margin requirements.

How does Bus Hold behave during power-down?

Bus Hold remains active until VDD drops below ~0.8V, retaining the last valid logic state on each D input. Below that threshold, inputs enter high-impedance mode with leakage <±0.5μA - preventing undefined states or unintended toggling during brown-out conditions.

Can both 8-bit sections operate with different clocks?

Yes - 1CLK and 2CLK are electrically isolated inputs. Each 8-bit bank responds only to its dedicated clock edge, enabling asynchronous latching of two independent data streams (e.g., sensor data and status flags) within one package.

Is a pull-up resistor required on OE for power-up stability?

Yes - tying OE to VDD via a 10kΩ pull-up ensures outputs remain in high-impedance during power ramp-up, preventing bus contention. This is mandatory per datasheet recommendation and verified in Pericom's application note AN-302 for ALVTC devices.