74ACT843SPC

Latches Overview

The Fairchild Semiconductor 74ACT843SPC is a 9-bit transparent latch belonging to the ACT series of CMOS logic devices. It features tri-state outputs and operates within a supply voltage range of 4.5V to 5.5V. The component is housed in a 24-pin Plastic Dual In-Line Package (PDIP). It supports an operating temperature range from -40°C to 85°C, ensuring reliability across industrial and commercial environments.

Latches Feature Summary

• Provides 9-bit data storage with transparent latch functionality for direct input-to-output transmission when enabled.
• Integrates tri-state output control to manage bus line sharing and prevent signal contention in multi-driver systems.
• Constructed using advanced CMOS technology to deliver high-speed performance while maintaining low power consumption.

Latches Applications

• High-density memory buffer circuits requiring parallel data latching
• Industrial control systems utilizing bus-oriented architectures
• Computing peripherals needing reliable data retention during clock transitions

Latches Procurement Notes

Verify the specific package variant, as datasheets may list both ceramic flatpack and plastic DIP options. Confirm RoHS compliance status and manufacturer lot codes upon receipt. Ensure handling procedures account for static sensitivity inherent to CMOS logic families. Cross-reference pinouts carefully if substituting older revisions.

Latches Selection Notes

Select this component when a 9-bit width is required for parallel data handling in 5V logic systems. The ACT series offers superior speed compared to standard LS logic. Consider the PDIP package for through-hole prototyping or high-reliability applications where leaded packages are preferred over surface-mount alternatives.

Latches Part Context

This device is part of Fairchild's extensive 74ACT logic family, designed to replace slower TTL equivalents with faster CMOS performance. The ACT series bridges the gap between legacy compatibility and modern speed requirements, widely used in digital system design for its balanced electrical characteristics and broad availability.

Latches Replacement Considerations

Equivalent parts include the ON Semiconductor version of the 74ACT843SPC. Verify pin compatibility and electrical specifications before substitution. Other manufacturers may offer compatible logic functions under different suffixes; ensure voltage and temperature ranges match the original design constraints.