SN74AHC273N

Flip Flops Overview

The SN74AHC273N is an octal D-type flip-flop manufactured by Texas Instruments, belonging to the AHC logic series. It features eight positive-edge-triggered D-flip-flops with a master reset input, packaged in a 20-pin PDIP format for through-hole mounting. The device operates within a supply voltage range of 2 V to 5.5 V and supports a maximum clock frequency of 110 MHz at 5 V. Key electrical parameters include a propagation delay of 11 ns at 5 V with 50 pF load, static current of 4 µA, and push-pull output drive capability of ±8 mA. It functions across an extended temperature range from -40°C to +125°C.

Flip Flops Feature Summary

• Contains eight independent positive-edge-triggered D-type flip-flops with a common master reset input.
• Provides high-speed data storage with low power consumption characteristics typical of CMOS technology.
• Features push-pull outputs capable of driving standard loads directly without external buffering.

Flip Flops Applications

• Parallel-to-serial data conversion circuits
• Register file implementations in digital systems
• Data bus holding and synchronization stages

Flip Flops Procurement Notes

Verify the package type matches the required PCB footprint, as this part number specifies a 20-pin PDIP configuration suitable for through-hole assembly. Confirm that the operating voltage requirements align with the 2 V to 5.5 V specification. Ensure thermal management strategies account for the -40°C to +125°C operating range if deployed in high-temperature environments. Cross-reference the manufacturer datasheet for pinout accuracy before finalizing design integration.

Flip Flops Selection Notes

Select this component when designing systems requiring parallel data latching with high-speed performance and wide voltage flexibility. The AHC series offers superior speed compared to standard HC logic while maintaining compatibility with TTL inputs. Consider the PDIP package only if through-hole manufacturing processes are mandated. Evaluate the 110 MHz clock limit against system timing requirements to ensure signal integrity is maintained under maximum load conditions.

Flip Flops Part Context

This device is part of the broader SN74AHC273 family, which includes variants with different packaging options such as SOIC, TSSOP, and VQFN. While the core logical function remains identical across the series, physical dimensions and thermal characteristics vary significantly between surface-mount and through-hole versions. The 'N' suffix specifically denotes the plastic dual-in-line package, distinguishing it from tape-and-reel or smaller footprint alternatives within the same product line.

Flip Flops Replacement Considerations

Direct functional substitutes within the same logic family include SN74AHC273DWR (SOIC) and SN74AHC273PWR (TSSOP), provided the PCB layout accommodates the respective package types. For legacy compatibility, SN74HC273 devices offer similar functionality but with slower switching speeds. Automotive-grade applications may require the SN74AHC273-Q1 variant instead.

Flip Flops FAQ

What is the maximum operating frequency of the SN74AHC273N?

The maximum clock frequency is 110 MHz when operating at 5 V with a 50 pF load capacitance.

Does the SN74AHC273N have an asynchronous reset function?

Yes, it includes a master reset input that asynchronously clears all eight flip-flops to a low state regardless of the clock signal.