74ALVCH16373DTR

Overview

The onsemi 74ALVCH16373DTR is a low-voltage 16-bit transparent latch with bus hold, packaged in TSSOP-48. It operates at VCC levels of 1.65 V to 3.6 V and features 3-state non-inverting outputs tolerant up to 3.6 V. Propagation delay ranges from 3.6 ns max at 3.0–3.6 V to 6.8 ns max at 1.65–1.95 V. Static drive capability is ±24 mA at 3.0 V. Quiescent supply current is 40 µA. The device supports live insertion and includes active bus-hold circuitry.

Feature Summary

• Features active bus-hold circuitry to maintain valid logic states for unused or floating inputs without external pull-up resistors.
• Supports live insertion and withdrawal operations within the system.
• Provides IOFF specification ensuring high impedance state when VCC equals 0 V.

Applications

• Bus-oriented applications requiring byte-controlled data storage
• Mixed 3.3 V and 5 V system interfacing
• High-speed memory address latching

Procurement Notes

Verify that the DTR suffix corresponds to the Tape & Reel shipping configuration containing 2500 units per reel. Confirm the package type is TSSOP-48 (Case 1201). Ensure compatibility with the specified operating voltage range of 1.65 V to 3.6 V for the target application environment.

Selection Notes

Select this component for designs requiring low-power operation in 1.8 V, 2.5 V, or 3.3 V systems. The inclusion of bus-hold functionality simplifies input handling for unused lines. Consider the propagation delay specifications relative to the system clock speed and ensure the 3.6 V output tolerance matches the downstream interface requirements.

Part Context

This part belongs to the 74ALVCH series of advanced low-voltage CMOS logic devices manufactured by onsemi. It functions as a 16-bit transparent latch with separate control for two octets. The device is designed for high-speed performance while minimizing power consumption in portable and battery-operated electronic applications.

Replacement Considerations

The datasheet identifies the 74ALVCH16373 as a second source to the industry standard equivalent. Verify pinout and electrical characteristics against other manufacturers' versions of the 74ALVCH16373 before substitution.

FAQ

How does the bus-hold feature function?

The data inputs include active bus-hold circuitry that eliminates the need for external pull-up resistors to hold unused or floating inputs at a valid logic state.

What is the behavior of the outputs when VCC is 0 V?

The IOFF specification guarantees that the outputs will be in a high impedance state when VCC equals 0 V.