74ALVCH16373DT

Overview

The onsemi 74ALVCH16373DT is a 16-bit transparent D-type latch featuring three-state outputs, designed for operation within a supply voltage range of 1.65 V to 3.6 V. It belongs to the ALVCH logic series and provides high-speed performance with propagation delays of 4.3 ns at 2.7 V and 3.6 ns at 3.3 V. The device supports low static current consumption of 40 uA and delivers an output drive capability of -24 mA. Packaged in a TSSOP-48 format, it operates reliably across temperatures from -40°C to +85°C.

Feature Summary

• Transparent latching architecture allows data input to pass directly to outputs when enabled, storing information upon latch enable transition.
• Three-state outputs facilitate bus-oriented applications by allowing multiple devices to share common data lines without interference.
• Bus hold functionality on data inputs eliminates the need for external pull-up or pull-down resistors for unused inputs.

Applications

• High-speed data buffering in memory systems
• Bus-oriented circuit designs requiring signal isolation
• Mixed-mode signal operations involving 3.3 V and 5 V logic levels

Procurement Notes

Verify component authenticity through authorized distributors as counterfeit risks exist. Confirm package integrity and moisture sensitivity handling requirements before assembly. Check RoHS compliance status against specific project regulations. Ensure ordering suffix matches required tape-and-reel quantities if applicable. Validate lead times due to potential supply chain fluctuations for legacy logic families.

Selection Notes

Select this component for applications requiring wide voltage compatibility between 1.65 V and 3.6 V. Consider its ALVCH series benefits for low power consumption alongside high-speed switching capabilities. Evaluate the TSSOP-48 package suitability for space-constrained PCB layouts. Compare propagation delay specifications against system timing requirements to ensure signal integrity.

Part Context

This part is a member of the 74ALVCH family, which combines advanced low-voltage CMOS technology with 5 V tolerance. It serves as a bridge between lower voltage core logic and higher voltage peripheral interfaces. The transparent latch design distinguishes it from edge-triggered flip-flops by providing direct data path control via the latch enable signal.

Replacement Considerations

SN74ALVCH16373DGGR (Texas Instruments) offers equivalent electrical characteristics and pinout compatibility. Verify functional equivalence regarding bus hold features and output drive strength before substitution. Ensure package dimensions match existing footprints to avoid mechanical rework during replacement.