SNJ54AC373FK

Overview

The SNJ54AC373FK is an octal D-type transparent latch with 3-state outputs manufactured by Texas Instruments. It operates within a supply voltage range of 2V to 6V and supports an operating temperature range from -55°C to 125°C. The device features a maximum propagation delay (tpd) of 9.5ns at 5V. It utilizes a 20-pin Leadless Ceramic Chip Carrier (LCCC) package designated as FK.

Feature Summary

• Transparent latch operation allows Q outputs to follow D inputs when latch-enable is high, storing data when latch-enable transitions low.
• Three-state noninverting outputs enable direct driving of bus lines without interface components.
• High drive capability designed for highly capacitive or low-impedance loads.

Applications

• Buffer registers
• I/O ports
• Bidirectional bus drivers
• Working registers

Procurement Notes

Verify the specific ordering suffix FK corresponds to the LCCC package configuration. Confirm military-grade qualification requirements if applicable, as indicated by the SN prefix. Ensure compatibility with the specified -55°C to 125°C operating temperature range for the target environment.

Selection Notes

Select this component for applications requiring octal data storage with bus-compatible outputs. The AC series offers higher speed compared to standard TTL families. Verify that the 2V to 6V supply voltage range aligns with the system power architecture and that the 3-state output control meets bus isolation requirements.

Part Context

This part belongs to the SNx4AC373 family of octal D-type transparent latches. The SNJ prefix indicates a military-grade version produced under specific quality standards. The FK suffix identifies the 20-pin leadless ceramic chip carrier package variant within the broader product line.

Replacement Considerations

SNJ54AC373J (CDIP package)

FAQ

How does the Output Enable (OE) pin affect internal latch operations?

The OE pin controls the output state but does not affect the internal operation of the latches. Data can be retained or entered while outputs are in the high-impedance state.

What is required for the OE pin during power-up or power-down?

To ensure a specified high-impedance state during power transitions, the OE pin must be tied to VCC through a pullup resistor.