Nexperia USA Inc. 74ALVT16823DGGS

Overview

74ALVT16823DGGS from Nexperia is an 18-bit positive-edge-triggered D-type flip-flop with independent 9-bit register banks, 3-state outputs, active-low master reset (nMR), clock enable (nCE), and output enable (nOE). It operates across 2.3 V to 3.6 V, delivers 250 MHz max clock frequency at 3.3 V, and features bus hold on all data inputs to eliminate external pull-ups. It is used in high-speed bus interface applications for MOS microprocessors and FPGA I/O expansion.

For engineers reviewing the 74ALVT16823DGGS datasheet, 74ALVT16823DGGS pinout, 74ALVT16823DGGS application, or 74ALVT16823DGGS equivalent, key selection criteria include dual 9-bit register control granularity, ±32 mA/±64 mA drive capability, overvoltage-tolerant 5.5 V inputs, IOFF partial power-down support, and TSSOP56 packaging for space-constrained logic buffering.

Technical Context

The device implements two independent 9-bit parallel registers, each with dedicated clock (nCP), clock enable (nCE), master reset (nMR), and output enable (nOE) controls. Each register bank latches data on the rising edge of its nCP when its nCE is LOW, while nMR asynchronously resets all Q outputs LOW and nOE places outputs in high-impedance state without affecting internal state.

Bus hold circuitry maintains valid logic levels on unused D inputs without external resistors; IOFF protection disables output current flow when VCC = 0 V, enabling live insertion/extraction. Propagation delays are specified down to 1.0 ns (tPLH/tPHL at 3.3 V), with set-up/hold times supporting tight timing margins in high-speed synchronous systems.

Key Specifications

Pinout & Package

TSSOP56 plastic thin shrink small outline package (SOT364-1), 56-pin, 6.1 mm body width, 0.5 mm pitch - optimized for high-density PCB layouts with thermal and mechanical reliability.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 18-bit bus-interface flip-flop applications.

Compared with SN74ALVTH16823DGGR, the 74ALVT16823DGGS offers lower ICC and integrated bus hold; versus 74LVT16823DGG, it adds critical industrial features including wider VCC range, IOFF, and stronger drive - making it superior for mixed-voltage, hot-swap, or low-power applications.

Availability

74ALVT16823DGGS is available at Aetrix Electronics and suitable for high-speed microprocessor bus interfaces, FPGA I/O expansion, industrial PLC backplanes, and automated test equipment requiring stable component supply and long-term manufacturability.

Supply support for 74ALVT16823DGGS 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

Nexperia is a global semiconductor expert delivering high-performance logic, analog, and discrete components with focus on efficiency, reliability, and scalability for automotive, industrial, and computing markets.

The 74ALVT series targets high-speed, low-voltage bus interface applications requiring robust noise immunity, mixed-voltage compatibility, and advanced power management features like IOFF and bus hold.

FAQ

What is the minimum VCC required for guaranteed operation?

The 74ALVT16823DGGS is fully specified from 2.3 V to 3.6 V. At 2.3 V, it supports 150 MHz maximum clock frequency, maintains valid VIH/VIL thresholds (1.7 V/0.7 V), and delivers 24 mA low-level output drive. Operation below 2.3 V is not guaranteed per datasheet limits.

Does the device support hot-swap or live insertion?

Yes - the integrated IOFF circuitry disables output current when VCC = 0 V, preventing bus contention during insertion or removal. Combined with overvoltage-tolerant 5.5 V inputs and power-up 3-state behavior, it meets live insertion requirements for modular backplane systems.

How does bus hold functionality eliminate external pull-up resistors?

Each data input includes a weak feedback transistor network that actively holds the last valid logic state (HIGH or LOW) when the input floats. This provides ~100 µA bus hold current at 2.3 V, removing the need for discrete pull-ups while maintaining noise margin and preventing metastability.

Can both 9-bit banks operate with different clock sources?

Yes - 1CP and 2CP are physically separate pins, allowing independent clock domains. Each bank responds only to its own nCP, nCE, nMR, and nOE signals, enabling asynchronous latching of two data streams or phase-divided clocking within a single package.