74AC374B

Overview

The STMicroelectronics 74AC374B is an obsolete octal D-type flip-flop featuring non-inverting outputs with three-state control. It operates within a 2V to 6V supply range and utilizes positive-edge triggering for data capture. The device provides symmetrical output drive capabilities of 24mA at high and low states, ensuring balanced signal integrity. It supports propagation delays as low as 9.5ns at 5V with 50pF load and functions reliably across an extended temperature range from -55°C to 125°C.

Feature Summary

• Octal D-type flip-flop architecture with eight independent storage elements
• Three-state non-inverting outputs controlled by an enable input
• Positive-edge clock triggering for synchronous data latching
• High-speed CMOS construction with sub-micron silicon gate technology

Applications

• Parallel-to-serial data conversion circuits
• Buffering and register stages in digital logic systems
• Interface modules between different voltage domains
• Memory address latching in embedded controllers

Procurement Notes

This component is officially classified as obsolete and no longer manufactured by STMicroelectronics. Procurement requires sourcing from third-party distributors or surplus markets. Verify lot dates and authenticity carefully, as availability varies significantly among resellers. Cross-reference with equivalent active parts from other manufacturers if long-term supply stability is required for production designs.

Selection Notes

Select this part only for legacy system maintenance or specific historical design compatibility. For new developments, consider modern equivalents like the 74LVC374A which offer improved power-down protection and lower voltage operation. Ensure that the 2V to 6V operating range aligns with the target system's power rails. Verify package pinout compatibility when replacing older designs with newer variants.

Part Context

The 74AC374B belongs to the 74AC series of advanced high-speed CMOS logic devices. This family is designed for applications requiring faster switching speeds compared to standard 74HC series components. The octal configuration allows handling multiple bits simultaneously, making it suitable for wide data bus applications in industrial and consumer electronics.

Replacement Considerations

• CD74AC374M Texas Instruments
• MC74AC374DWG onsemi
• SN74AC374DWR Texas Instruments

FAQ

Is the 74AC374B RoHS compliant?

Yes, the 74AC374B is RoHS3 compliant.

What is the maximum operating voltage for this device?

The maximum supply voltage is 6V.