JM38510/38201B2A

Latches Overview

The JM38510/38201B2A is an octal D-type transparent latch with 3-state outputs, manufactured by Texas Instruments under the SN54ALS573C designation. It operates within a supply voltage range of 4.5 V to 5.5 V and supports a military temperature range of -55°C to 125°C. The device features a bus-structured pinout in a 20-pin Ceramic Leadless Chip Carrier (FK) package. Key electrical parameters include a propagation delay from data input to output of 2 ns to 20 ns, and low-level output current capability up to 12 mA.

Latches Feature Summary

• Octal D-type transparent latches designed for driving highly capacitive or low-impedance loads
• Three-state buffer-type outputs enable direct connection to bus lines without interface components
• Buffered output-enable input allows placement of outputs in normal logic states or high-impedance state
• Bus-structured pinout facilitates implementation as buffer registers, I/O ports, and bidirectional bus drivers

Latches Applications

• Implementing buffer registers in digital systems
• Creating I/O ports for peripheral interfacing
• Serving as bidirectional bus drivers in bus-structured architectures
• Functioning as working registers for temporary data storage

Latches Procurement Notes

Verify that the procurement source provides documentation confirming QML certification per MIL-M-38510 Class B standards. Ensure the delivered component matches the SN54ALS573C functional specification and FK ceramic package outline. Confirm that the manufacturer's datasheet explicitly lists this specific part number as an active production item with the specified military temperature rating.

Latches Selection Notes

Select this component when designing systems requiring octal latching with three-state bus isolation in harsh environments. The ALS technology offers a balance of speed and power consumption suitable for military applications. Consider the 20-pin FK ceramic package for hermetic sealing requirements. Verify that the system voltage remains within the 4.5 V to 5.5 V range to ensure proper logic levels and output drive capabilities.

Latches Part Context

This part belongs to the SN54 series of logic devices, which are characterized for full military temperature ranges. It is functionally equivalent to the commercial SN74ALS573C but qualified for extended environmental conditions. The JM38510 prefix indicates it is a microcircuit manufactured under government specifications, ensuring traceability and reliability standards required for defense and aerospace electronics.

Latches Replacement Considerations

SNJ54ALS573CFK

Latches FAQ

How does the output-enable input affect internal latch operation?

The buffered output-enable input places the eight outputs in a high-impedance state or normal logic state but does not affect the internal operation of the latches. Data can be retained or entered while the outputs are disabled.

What is the behavior of the outputs when the latch-enable input is low?

When the latch-enable input is low, the outputs are latched to retain the data that was set up at the data inputs prior to the falling edge of the latch-enable signal.