MC74AC273NG

Flip Flops Overview

The MC74AC273NG is an octal D-type flip-flop manufactured by onsemi, belonging to the 74AC logic series. It integrates eight edge-triggered D-type flip-flops with individual D inputs and Q outputs within a single package. The device operates on a supply voltage range of 2 V to 6 V and utilizes a 20-pin PDIP (0.300 inch, 7.62 mm wide) through-hole package. Key electrical parameters include a propagation delay of 13 ns, high-level output current of -24 mA, and low-level output current of 24 mA. It supports a non-inverting output polarity and functions within a temperature range of -40°C to +85°C.

Flip Flops Feature Summary

• Contains eight edge-triggered D-type flip-flops with individual data inputs and corresponding outputs
• Features a common buffered clock input for synchronized operation across all stages
• Includes a buffered asynchronous master reset input to clear all flip-flops simultaneously
• Provides high drive capability with outputs capable of sourcing and sinking 24 mA

Flip Flops Applications

• Buffering signals for MOS microprocessor systems
• Data storage in memory architectures
• Parallel-to-serial conversion circuits
• General-purpose digital logic timing applications

Flip Flops Procurement Notes

Verify the specific package type when ordering, as the MC74AC273 family includes surface-mount variants like TSSOP and SOIC alongside the PDIP configuration. Confirm that the required lead time aligns with project schedules, as production cycles may vary. Ensure compatibility with existing board layouts designed for 20-pin DIP footprints. Check RoHS compliance status if environmental regulations apply to the final assembly. Cross-reference the full part number to distinguish between standard and A-grade temperature ranges.

Flip Flops Selection Notes

Select this component when high-speed switching is required compared to HC series alternatives, given its faster propagation characteristics. The 24 mA output drive strength makes it suitable for direct interfacing with moderate capacitive loads without additional buffering. Consider the PDIP package only if through-hole manufacturing or prototyping is necessary. Evaluate the 2 V to 6 V operating range against system power rails to ensure stable logic levels. Compare against the MC74ACT273 if TTL-compatible input thresholds are mandatory for mixed-voltage interfaces.

Flip Flops Part Context

This component is part of the broader 74AC logic family, which offers higher speed performance than the standard 74HC series while maintaining CMOS power efficiency. It serves as a fundamental building block for sequential logic circuits requiring parallel data retention. The 'N' suffix specifically denotes the plastic dual-in-line package variant, distinguishing it from tape-and-reel surface mount versions like the DTR2G or DWG. It complements other octal devices such as latches and three-state buffers within the same product line.

Flip Flops Replacement Considerations

• MC74AC273DTR2G
• MC74AC273DWG

Flip Flops FAQ

Does the MC74AC273NG have a clock enable feature?

No, the MC74AC273NG does not include a clock enable input. For designs requiring clock enable functionality, the MC74AC377 should be selected instead.

What is the difference between the MC74AC273 and MC74ACT273 regarding inputs?

The MC74ACT273 features TTL-compatible inputs, whereas the MC74AC273 uses standard CMOS input thresholds. This affects noise immunity and interface requirements with legacy logic families.