Nexperia USA Inc. 74ALVT16823DL,518

Overview

74ALVT16823DL,518 from Nexperia is an 18-bit positive-edge-triggered D-type flip-flop with dual 9-bit register banks, independent master reset (nMR), clock enable (nCE), and 3-state output enable (nOE) per bank. It operates from 2.3 V to 3.6 V, delivers ±64 mA output drive, and supports 250 MHz maximum clock frequency at 3.3 V. Used in high-speed bus interface logic for industrial control backplanes and memory expansion modules.

For engineers reviewing the 74ALVT16823DL,518 datasheet, 74ALVT16823DL,518 pinout, 74ALVT16823DL,518 application, or 74ALVT16823DL,518 equivalent, key selection criteria include dual-bank timing independence, bus-hold input retention, IOFF power-down protection, and TSSOP56 package compatibility with dense PCB layouts.

Technical Context

This device implements two independent 9-bit parallel registers, each with dedicated nCP, nCE, nMR, and nOE signals-enabling asynchronous reset and selective output gating per bank. The BiCMOS process delivers TTL-compatible input thresholds and rail-to-rail 3-state outputs with fast propagation delays (tPLH/tPHL ≤ 3.1 ns at 3.3 V).

Bus-hold circuitry eliminates external pull-ups on unused data inputs, while IOFF ensures no current flow when VCC = 0 V-critical for live insertion and hot-swap systems. All control inputs tolerate 5.5 V, allowing direct interfacing with legacy 5 V buses without level shifters.

Key Specifications

Pinout & Package

TSSOP56 plastic thin shrink small outline package (SOT364-1); 56-pin, 6.1 mm body width, 0.5 mm pitch; suitable for automated SMT assembly and high-density routing.

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 74ALVT16823DL,518 offers lower static current and superior 5.5 V input tolerance; versus 74LVC16374APAG, it provides two extra bits, bus-hold, and stronger drive-making it irreplaceable in full 18-bit industrial bus designs.

Availability

74ALVT16823DL,518 is available at Aetrix Electronics and suitable for industrial backplane interfaces, memory expansion modules, FPGA I/O bridges, and legacy bus protocol adapters requiring stable component supply across long production lifecycles.

Supply support for 74ALVT16823DL,518 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 MOSFET solutions optimized for efficiency, reliability, and manufacturability in industrial and automotive applications.

The 74ALVT series targets high-speed, low-voltage bus interface applications-designed specifically for seamless integration between advanced processors and legacy parallel peripherals under tight timing constraints.

FAQ

What is the minimum pulse width required for the master reset (nMR) input?

The minimum active-low pulse width for nMR is 2.0 ns at VCC = 3.3 V, measured at the 50 % voltage threshold. This ensures reliable asynchronous reset of both 9-bit banks without metastability. Pulse widths below this may result in incomplete or inconsistent reset behavior across temperature and voltage corners.

Does the 74ALVT16823DL,518 support hot-swap operation?

Yes-it supports live insertion and extraction due to IOFF circuitry that disables output leakage when VCC = 0 V, and bus-hold inputs that maintain defined logic states on floating data lines. These features prevent bus contention and signal corruption during hot-plug events in modular systems.

Can the two 9-bit banks operate with different clock frequencies?

Yes-each bank has independent clock (nCP), clock enable (nCE), and output enable (nOE) inputs, allowing fully asynchronous operation. For example, Bank 1 can latch sensor data at 10 MHz while Bank 2 transfers display data at 50 MHz, with no timing coupling between them.

What is the purpose of the bus-hold feature on data inputs?

Bus-hold circuitry actively maintains the last valid logic state on unused or unterminated data inputs using weak feedback transistors-eliminating the need for external pull-up/pull-down resistors. This reduces component count, saves PCB area, and prevents floating inputs from causing erratic behavior or increased EMI.