NXP Semiconductors 74ALVCH16373DGG,11

Overview

74ALVCH16373DGG,11 from Nexperia is a 16-bit D-type transparent latch with dual 8-bit latch enable (1LE/2LE) and output enable (1OE/2OE) controls, bus-hold inputs, and 3-state outputs. It operates from 1.2 V to 3.6 V, delivers ±24 mA drive at 3.0 V, and supports -40 °C to +85 °C industrial temperature range. Used in high-speed data buffering and bus isolation in memory interface and FPGA I/O expansion circuits.

For engineers reviewing the 74ALVCH16373DGG,11 datasheet, 74ALVCH16373DGG,11 pinout, 74ALVCH16373DGG,11 application, or 74ALVCH16373DGG,11 equivalent, this page provides verified functional architecture, TSSOP48 pin mapping, bus-hold behavior, IOFF partial power-down compliance, and real-world timing parameters including tpd ≤ 3.3 ns at 3.3 V.

Technical Context

The device implements two independent 8-bit transparent latch sections sharing a common 48-pin TSSOP package. Each section features active-HIGH latch enable and active-LOW 3-state output enable, enabling concurrent or staggered latching and output control without internal contention.

Bus-hold circuitry maintains stable logic states on unused or floating inputs, eliminating external pull-up/down resistors. The IOFF specification ensures outputs enter high-impedance state during partial power-down, preventing backflow current when VCC = 0 V while other rails remain active.

Key Specifications

Pinout & Package

TSSOP48 package (SOT362-1), 6.1 mm body width, 0.5 mm lead pitch, 48 leads. Designed for high-density PCB layouts with low-inductance multiple VCC/GND pins to minimize ground bounce and switching noise.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit transparent latch applications.

Compared with SN74ALVTH16373GR, the 74ALVCH16373DGG,11 offers integrated bus-hold and IOFF at slightly lower drive strength; compared with 74LVC16373ADGG,118, it adds critical IOFF protection and improves speed by 0.9 ns - making it optimal for mixed-power-domain industrial controllers.

Availability

74ALVCH16373DGG,11 is available at Aetrix Electronics and suitable for memory interface buffering, FPGA I/O expansion, industrial PLC backplane isolation, and ATE signal routing requiring stable component supply across extended temperature and mixed-voltage environments.

Supply support for 74ALVCH16373DGG,11 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 focused on high-volume, high-reliability logic, analog, and MOSFET solutions for industrial, computing, and consumer markets.

The 74ALVCH series targets high-speed, low-voltage bus interface applications requiring robust noise immunity, partial power-down capability, and compatibility with legacy TTL and modern CMOS logic families.

FAQ

Does the 74ALVCH16373DGG,11 support 1.8 V operation?

Yes. The device is fully specified from 1.2 V to 3.6 V, with guaranteed performance at 1.8 V including VIH/VIL thresholds, propagation delay (tpd ≤ 5.7 ns), and bus-hold current (IBHL = 45 μA). It complies with JEDEC JESD8-7 for 1.65–1.95 V operation and interfaces directly with 1.8 V FPGA I/O banks.

How does the bus-hold feature eliminate external pull resistors?

Each input contains an internal feedback circuit that sources or sinks current to maintain its last-valid logic state when un-driven. At VCC = 3.0 V, IBHH = −175 μA (HIGH hold) and IBHL = 75 μA (LOW hold), providing sufficient current to overcome typical PCB leakage and noise - removing need for discrete 10 kΩ pull-ups/downs.

What is the purpose of the IOFF specification?

IOFF ensures all outputs go high-impedance when VCC = 0 V, even if input voltages remain present. This prevents reverse current flow from live signal lines into a powered-down section of the system - a critical requirement in hot-swap, modular power supplies, and multi-rail industrial controllers.

Can both 8-bit sections operate independently?

Yes. 1LE/1OE control the first 8-bit group (1D0–1D7 / 1Q0–1Q7), while 2LE/2OE control the second (2D0–2D7 / 2Q0–2Q7). They share no internal coupling - enabling asymmetric timing, separate bus assignments, or staggered latching for time-division multiplexing in data acquisition systems.