SNJ54AHC573J

Overview

The SNJ54AHC573J is an octal transparent D-type latch with 3-state outputs manufactured by Texas Instruments. It operates within a supply voltage range of 2V to 5.5V and supports a military temperature range from -55°C to 125°C. The device features eight data inputs (D), a latch enable input (LE), and an output enable input (OE). Outputs are high-impedance when OE is high, allowing direct bus driving without interface components.

Feature Summary

• Octal transparent D-type latch architecture
• Three-state outputs for direct bus line driving
• Wide operating voltage range from 2V to 5.5V
• Latch-up performance exceeding 250mA per JESD 17

Applications

• Servers
• PCs and Notebooks
• Network Switches
• Wearable Health and Fitness Devices
• Telecom Infrastructures

Procurement Notes

Verify the specific ordering suffix 'J' corresponds to the ceramic dual in-line package (CDIP) variant. Confirm that the MIL-PRF-38535 compliance status matches project requirements, as parameter testing protocols differ between qualified and standard production processing. Ensure all unused inputs are tied to VCC or GND during operation.

Selection Notes

Select this component for applications requiring wide voltage compatibility and robust environmental tolerance. The AHC logic family provides balanced drive characteristics suitable for minimizing output ringing on bus interfaces. Verify thermal management needs against junction-to-ambient resistance values for the specific CDIP package configuration.

Part Context

This part belongs to the SNx4AHC573 family of octal transparent D-type latches. The 'SNJ' prefix indicates a military-grade device compliant with MIL-PRF-38535 standards. The 'J' suffix designates the 20-pin ceramic dual in-line package. This series is designed for low-drive CMOS applications where slow edge rates help reduce overshoot and undershoot.

Replacement Considerations

SNJ54AHC573FK

FAQ

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

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

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

Tie OE to VCC through a pull-up resistor to ensure the high-impedance state during power up or power down.