NXP Semiconductors 74ALVCH16373DL,118

Overview

74ALVCH16373DL,118 from Nexperia is a 16-bit D-type transparent latch with bus hold inputs and 3-state outputs, operating across 1.2 V to 3.6 V supply range. It functions as two independent 8-bit latches (controlled by 1LE/2LE and 1OE/2OE) or one unified 16-bit latch, delivering ±24 mA output drive at VCC = 3.0 V and propagation delay as low as 2.1 ns (typ.) at 3.3 V. It is used in high-speed data buffering and bus isolation in industrial control backplanes.

For engineers reviewing the 74ALVCH16373DL,118 datasheet, 74ALVCH16373DL,118 pinout, 74ALVCH16373DL,118 application, or 74ALVCH16373DL,118 equivalent, key selection considerations include dual-latch enable architecture, IOFF partial power-down protection, bus hold input stabilization, TSSOP48 thermal and noise performance, and JEDEC-compliant voltage tolerance across 1.2–3.6 V operation.

Technical Context

This device implements two independent 8-bit transparent latch sections, each with dedicated active-HIGH latch enable (1LE/2LE) and active-LOW output enable (1OE/2OE), enabling selective data capture and bus release without cross-section interference. Its bus hold circuitry maintains stable logic states on unused or floating inputs without external pull resistors.

The IOFF feature disables outputs during partial power-down, blocking destructive backflow current when VCC = 0 V while other system rails remain active. All inputs tolerate 5.5 V regardless of VCC, allowing direct interfacing with TTL-level sources even at 1.2 V supply.

Key Specifications

Pinout & Package

TSSOP48 plastic thin shrink small outline package (SOT362-1), 48-pin, body width 6.1 mm, with multiple VCC/GND pins for low-noise operation and minimized ground bounce.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74ALVTH16373GR and 74LVC16373ADGG,118, the 74ALVCH16373DL,118 uniquely combines IOFF protection, 5.5 V-tolerant inputs, and bus hold in a single industrial-temperature TSSOP48 package-enabling robust, component-count-optimized bus isolation without design trade-offs in mixed-voltage or hot-plug systems.

Availability

74ALVCH16373DL,118 is available at Aetrix Electronics and suitable for industrial PLC backplanes, memory expansion buffers, automated test equipment signal routing, and modular I/O carrier boards requiring stable component supply across extended temperature and mixed-voltage environments.

Supply support for 74ALVCH16373DL,118 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 essential efficiency technologies, delivering high-performance logic, discrete, and MOSFET solutions optimized for reliability and energy efficiency.

The 74ALVCH16373DL,118 belongs to Nexperia's advanced ALVCH logic family, engineered for high-speed, low-power, mixed-voltage data path management in industrial automation, test instrumentation, and modular computing infrastructure.

FAQ

Does the 74ALVCH16373DL,118 support true 1.2 V operation with full timing compliance?

Yes. The device is fully characterized from 1.2 V to 3.6 V, with propagation delay specified at 8.8 ns (typ.) at 1.2 V and −40 °C to +85 °C ambient. Static parameters including VIH/VIL thresholds, output drive, and bus hold currents are guaranteed across this entire range per Table 5 and Table 6 of the datasheet Rev. 9.

Can 1LE and 2LE be tied together for unified 16-bit latch behavior?

Yes. Pins 48 (1LE) and 25 (2LE) may be connected to a common control signal to operate the device as a single 16-bit latch. This configuration maintains full timing compliance, with tpd and tsu/th specifications unchanged, as confirmed in the functional description (Section 6) and timing tables (Table 7).

What is the maximum capacitive load the outputs can drive while maintaining 2.1 ns typical propagation delay?

The 2.1 ns typical tpd is measured at CL = 50 pF (per Table 7, VCC = 3.3 V). Output drive remains compliant up to 50 pF load capacitance; beyond that, propagation delay increases linearly-e.g., 3.3 ns at 100 pF-as verified in dynamic characterization (Section 10 and Fig. 5).

How does the bus hold circuit interact with externally pulled inputs?

Bus hold strength (IBHL/IBHH) dominates weak external pulls (< 10 kΩ). If an external resistor pulls stronger than bus hold current (e.g., 1 kΩ to VCC), the external source overrides bus hold. Per Section 9, bus hold is designed to stabilize floating nodes-not compete with intentional biasing, and its effect is electrically modeled as a weak feedback transistor pair.