CD74ACT273M Equivalent & Substitute Parts

Part Overview

The CD74ACT273M is a D-Type flip-flop logic integrated circuit manufactured by Texas Instruments, featuring 1 element with 8-bit capacity and positive edge triggering. This component is classified as a master reset flip-flop in the 74ACT logic series and is packaged in a 20-SOIC surface mount configuration. The CD74ACT273M is currently discontinued at DiGi Electronics, making equivalent substitute parts necessary for ongoing design support and procurement.

Substiute Parts

CD74ACT273M

Texas InstrumentsIn Stock: 1233CD74ACT273M Datasheet

Current PartRFQ

CD74ACT273M96

Texas InstrumentsIn Stock: 1481CD74ACT273M96 Datasheet

DirectRFQ

MC74ACT273DWR2G

onsemiIn Stock: 2342MC74ACT273DWR2G Datasheet

DirectRFQ

MC74ACT273DWG

onsemiIn Stock: 2296MC74ACT273DWG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CD74ACT273M is determined by the following critical parameters:

• Logic Function: D-Type flip-flop with master reset capability, 1 element, 8-bit configuration
• Package Compatibility: 20-SOIC surface mount form factor (0.295", 7.50mm Width)
• Electrical Interface: 4.5V to 5.5V supply voltage range, positive edge trigger
• Output Characteristics: Non-inverted output type, 24mA output current (high and low)
• Compliance Requirements: ROHS3 compliance, EAR99 classification

All substitute parts maintain identical functional architecture and pinout compatibility. Variations in clock frequency, propagation delay, input capacitance, and operating temperature ranges are within acceptable tolerance for 74ACT series logic substitution.

Parameter Comparison

Engineering Selection Recommendations

CD74ACT273M96 (Texas Instruments, Active Status): Direct manufacturer alternative with identical electrical specifications and extended temperature range matching the original part. Suitable for applications requiring continuity with Texas Instruments sourcing. Available in Tape & Reel packaging for automated assembly.

MC74ACT273DWR2G (onsemi, Active Status): Cross-manufacturer substitute with enhanced performance characteristics including higher clock frequency (200 MHz) and reduced propagation delay (11ns). Operating temperature range is narrower (-40°C to 85°C). Moisture sensitivity level is MSL 3, requiring controlled storage conditions. Available in Tape & Reel packaging.

MC74ACT273DWG (onsemi, Active Status): Functionally equivalent to MC74ACT273DWR2G with identical electrical performance. Packaging format is Tube rather than Tape & Reel, suitable for manual assembly or lower-volume applications. Same MSL 3 moisture sensitivity and operating temperature constraints apply.

All substitute parts maintain ROHS3 compliance and EAR99 classification. Selection should account for packaging requirements, temperature operating range constraints, and moisture handling procedures for onsemi variants.

Frequently Asked Questions (FAQ)

Q: Can MC74ACT273DWR2G replace CD74ACT273M in all applications?

A: MC74ACT273DWR2G is functionally compatible at the pinout and logic level. However, the operating temperature range is restricted to -40°C to 85°C compared to the original -55°C to 125°C. Applications requiring extended low-temperature operation below -40°C or high-temperature operation above 85°C require CD74ACT273M96 or equivalent Texas Instruments parts.

Q: What is the difference between MC74ACT273DWR2G and MC74ACT273DWG?

A: Both parts are electrically identical. The primary difference is packaging: MC74ACT273DWR2G is supplied in Tape & Reel format for automated pick-and-place assembly, while MC74ACT273DWG is supplied in Tube format for manual handling or lower-volume production runs.

Q: Does the higher clock frequency of onsemi parts affect compatibility?

A: No. The onsemi variants (200 MHz clock frequency) are backward compatible with designs specified for 85 MHz operation. Higher clock frequency capability does not create incompatibility; it represents enhanced performance margin.

Q: Are there moisture sensitivity concerns with onsemi substitutes?

A: onsemi parts carry MSL 3 rating (168-hour moisture sensitivity level) compared to MSL 1 (unlimited) for Texas Instruments parts. MSL 3 components require controlled storage in dry conditions and have a 168-hour floor life after moisture exposure. Proper moisture barrier packaging and bake-out procedures must be followed before assembly.

Q: Is CD74ACT273M96 a direct replacement for CD74ACT273M?

A: Yes. CD74ACT273M96 is the active production equivalent from Texas Instruments with identical electrical specifications, extended temperature range, and ROHS3 compliance. It is the recommended substitute for applications requiring Texas Instruments sourcing continuity.