SNJ54ACT373J

Overview

The SNJ54ACT373J is an octal transparent D-type latch with 3-state outputs manufactured by Texas Instruments. It operates within a supply voltage range of 4.5V to 5.5V and features inputs compatible with TTL voltage levels. The device provides a maximum propagation delay (tpd) of 10ns at 5V. It utilizes a 20-pin Ceramic Dual In-Line Package (CDIP). The component supports an operating free-air temperature range from -55°C to +125°C, suitable for military-grade applications.

Feature Summary

• Features 3-state outputs designed for driving highly capacitive or low-impedance loads.
• Transparent latch operation allows Q outputs to follow D inputs when latch-enable is high.
• Buffered output-enable input controls normal logic states or high-impedance bus isolation.
• Inputs accept voltages up to the maximum supply voltage rating.

Applications

• Implementing buffer registers in digital systems.
• Serving as I/O ports for data interface.
• Functioning as bidirectional bus drivers.
• Operating as working registers in memory architectures.

Procurement Notes

Verify the specific ordering suffix 'J' corresponds to the CDIP package variant. Confirm RoHS compliance status, as indicated by the manufacturer's documentation. Ensure the procurement channel sources parts matching the SN54ACT373 family specifications. Validate that the supplier provides traceability for military-grade components.

Selection Notes

Select this component for designs requiring wide temperature stability and TTL-compatible inputs. The ACT series offers faster switching speeds compared to standard HC logic. Consider the CDIP package constraints for through-hole mounting requirements. Evaluate the 3-state output capability for bus-oriented system topologies.

Part Context

This part belongs to the SNx4ACT373 family of octal D-type latches. The SN54 prefix denotes military-grade qualification and extended temperature ranges. The ACT series represents advanced CMOS technology optimized for speed and power efficiency. The J suffix specifically identifies the ceramic dual in-line packaging configuration.

Replacement Considerations

SNJ54ACT373W

FAQ

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

The OE pin only controls the output state. It does not affect internal latch operations, allowing data retention or entry while outputs are in the high-impedance state.

What is the recommended method to ensure high-impedance state during power-up?

Tie the OE pin to VCC through a pullup resistor. The minimum resistor value depends on the current-sinking capability of the driver.