CD74ACT373M

Latches Overview

The CD74ACT373M is an octal transparent latch manufactured by Harris Corporation using advanced CMOS technology. It features eight D-type latches with three-state outputs, designed for high-speed data storage and bus interfacing applications. The device operates within a supply voltage range of 4.5V to 5.5V and supports a wide operating temperature range from -55°C to +125°C. Key electrical characteristics include a typical propagation delay of 10.4ns at 5V, low static current consumption of 8µA, and output drive capabilities of 32mA (low) and -24mA (high). It is housed in a 20-pin DIP package.

Latches Feature Summary

• Octal transparent latch architecture providing eight independent D-type storage elements
• Three-state outputs enabling direct connection to system buses without external drivers
• High-speed CMOS construction ensuring significant power reduction compared to LSTTL equivalents
• Balanced propagation delays and transition times for reliable synchronous operation

Latches Applications

• Parallel data buffering in high-speed digital systems
• Bus interface circuits requiring isolated storage and tri-state control
• Register files in microprocessor-based architectures
• Data acquisition systems needing synchronized input capture

Latches Procurement Notes

Verify the manufacturer origin as Harris Corporation, noting that Texas Instruments has since acquired this product line. Confirm the specific suffix 'M' indicates the correct package variant if distinct from standard E versions. Check RoHS compliance status as older Harris parts may not meet current environmental standards. Ensure the operating temperature grade matches your application requirements, specifically the extended -55°C to +125°C range typical for military or industrial grades.

Latches Selection Notes

Select this component when an octal latch with three-state output capability is required for bus-driven applications. The ACT series offers faster switching speeds than standard HC or HCT logic families while maintaining CMOS power efficiency. Consider the 4.5V to 5.5V supply constraint and ensure compatibility with downstream logic levels. The wide temperature range makes it suitable for harsh environments where standard commercial grade devices would fail.

Latches Part Context

This part belongs to the 74ACT logic family, which bridges the performance gap between standard CMOS and fast TTL technologies. Harris Corporation was a primary manufacturer before its semiconductor division was acquired by Texas Instruments. The CD74 prefix denotes commercial temperature range variants, though specific sub-bgrades may extend this. The ACT series is characterized by its speed-power product optimization, making it ideal for battery-powered high-speed applications.

Latches Replacement Considerations

Direct pin-compatible substitutes include the CD74HCT373E for lower speed requirements or the CD74HC373E for broader voltage operation. Texas Instruments equivalents such as SN74ACT373N are functionally identical. Verify that replacement parts maintain the same three-state output enable logic polarity and propagation delay specifications to ensure circuit timing integrity.