74ACT373MSA

Latches Overview

The Fairchild Semiconductor 74ACT373MSA is an octal transparent latch with three-state outputs, belonging to the ACT logic series. It utilizes CMOS technology and features a single function with eight bits of data processing capability. The device is housed in a 20-pin SSOP package (MSA code) designed for surface-mount applications. It operates within a supply voltage range of 4.5 V to 5.5 V and supports a wide operating temperature range from -40°C to +85°C.

Latches Feature Summary

• Octal D-type transparent latch architecture providing eight independent storage elements within a single integrated circuit.
• Three-state output configuration enabling direct connection to bus-oriented systems without external buffering.
• ACT series performance characteristics offering high-speed operation combined with low power consumption typical of CMOS technology.

Latches Applications

• Bus-oriented system architectures requiring parallel data storage and controlled output isolation.
• High-speed digital signal processing interfaces utilizing standard TTL-compatible input levels.
• Memory address latching and data register applications in microprocessor-based control systems.

Latches Procurement Notes

Verify component authenticity through manufacturer documentation or authorized distributor channels. Confirm package integrity and pin alignment against the 20-SSOP specification. Ensure environmental compliance requirements match project standards, noting that specific RoHS status may vary by production batch. Validate operating temperature ranges align with intended deployment conditions before finalizing procurement decisions.

Latches Selection Notes

Select this component when designing systems requiring octal data storage with bus-compatible three-state outputs. The ACT series offers superior speed compared to standard HC logic while maintaining CMOS power efficiency. Ensure the design accommodates the 4.5 V to 5.5 V supply voltage requirement and utilizes appropriate decoupling capacitors near the power pins to maintain signal integrity during high-speed switching operations.

Latches Part Context

This device belongs to the widely adopted 74ACT logic family, which bridges the performance gap between older LS-TTL and newer AC/HC CMOS technologies. The 373 variant specifically provides transparent latch functionality, distinct from flip-flops like the 374, allowing data to pass directly to outputs when enabled. This makes it suitable for temporary data holding in complex digital circuits where bus sharing is critical.

Latches Replacement Considerations

Direct substitutes include the SN74ACT373MTCX from Texas Instruments and the MC74ACT373MTCX from onsemi. These alternatives share identical logical functions, pinouts, and electrical specifications, ensuring drop-in compatibility for existing PCB layouts and firmware configurations without requiring design modifications.