CD74AC74M Equivalent & Substitute Parts

Part Overview

The CD74AC74M is a dual D-type flip-flop logic integrated circuit manufactured by Texas Instruments in the 74AC series. This device features two independent 1-bit D-type flip-flops with complementary outputs, positive edge triggering, and set/preset and reset functions. The CD74AC74M is classified as obsolete, necessitating identification of equivalent and substitute parts for ongoing design requirements and procurement needs. Substitute parts must maintain functional equivalence while meeting the same electrical and mechanical specifications required for direct component replacement.

Substiute Parts

CD74AC74M

Texas InstrumentsIn Stock: 4553CD74AC74M Datasheet

Current PartRFQ

CD74AC74M96

Texas InstrumentsIn Stock: 6333CD74AC74M96 Datasheet

DirectRFQ

MC74AC74DR2G

onsemiIn Stock: 2964MC74AC74DR2G Datasheet

DirectRFQ

MC74AC74DG

onsemiIn Stock: 2540MC74AC74DG Datasheet

MFR RecommendedRFQ

NLV74AC74DR2G

onsemiIn Stock: 3631NLV74AC74DR2G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CD74AC74M is determined by strict adherence to the following critical parameters:

Mechanical Compatibility:

• Package type must be 14-SOIC (0.154", 3.90mm Width) for direct pin-for-pin replacement
• Mounting type must be Surface Mount
• Moisture Sensitivity Level must be 1 (Unlimited)

Functional Equivalence:

• Device type must be D-Type flip-flop with 2 elements, 1 bit per element
• Output type must be Complementary
• Trigger type must be Positive Edge
• Function must include Set(Preset) and Reset capabilities

Electrical Parameters:

• Voltage supply range must encompass or match the original specification (1.5V ~ 5.5V minimum)
• Max propagation delay at 5V, 50pF must not exceed 10ns
• Current output high and low must be 24mA minimum
• Quiescent current must not exceed 4 µA
• Input capacitance must not exceed 10 pF

Compliance Requirements:

• RoHS3 Compliant status required
• REACH Unaffected status required

Substitute parts are grouped based on product status (Active or Obsolete) and packaging format (Tube or Tape & Reel). Parts meeting all electrical and mechanical parameters are considered functionally equivalent.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute (Active Status, Texas Instruments): CD74AC74M96 is the direct Texas Instruments equivalent with Active product status. This part maintains identical electrical specifications to the CD74AC74M, including the 1.5V ~ 5.5V supply voltage range, 10ns propagation delay, and 4 µA quiescent current. The primary difference is packaging format (Tape & Reel versus Tube). This part is recommended for applications requiring continuity with the original Texas Instruments 74AC series lineage and extended operating temperature range (-55°C ~ 125°C).

Alternative Substitutes (Active Status, onsemi): MC74AC74DR2G and MC74AC74DG are onsemi equivalents with Active product status. Both parts meet the core electrical requirements with 10ns propagation delay and 24mA output current. These parts feature an expanded voltage supply range (2V ~ 6V) and lower input capacitance (4.5 pF). Operating temperature range is reduced to -40°C ~ 85°C. MC74AC74DR2G is supplied in Tape & Reel format, while MC74AC74DG is supplied in Tube format. Selection between these parts depends on packaging requirements and temperature operating range compatibility.

Obsolete Substitute (Not Recommended for New Designs): NLV74AC74DR2G is classified as Obsolete and exhibits degraded electrical performance compared to the main part, including 12.5ns propagation delay (exceeds 10ns specification) and elevated quiescent current (40 µA versus 4 µA). This part does not meet the substitution criteria and is not suitable for replacement applications.

Compliance Verification: All recommended substitute parts (CD74AC74M96, MC74AC74DR2G, MC74AC74DG) maintain ROHS3 Compliance and REACH Unaffected status, ensuring regulatory compliance equivalent to the original CD74AC74M.

Frequently Asked Questions (FAQ)

Q: Can CD74AC74M96 be used as a direct replacement for CD74AC74M?

A: Yes. CD74AC74M96 is functionally equivalent to CD74AC74M with identical electrical specifications. Both parts are 14-SOIC surface mount packages with 2 elements, 1 bit per element, complementary outputs, and positive edge triggering. The primary difference is packaging format (Tape & Reel versus Tube) and product status (Active versus Obsolete). Pin configuration and electrical performance are identical.

Q: What are the key differences between Texas Instruments and onsemi substitutes?

A: Texas Instruments CD74AC74M96 maintains the original 1.5V ~ 5.5V supply voltage range and -55°C ~ 125°C operating temperature. onsemi parts (MC74AC74DR2G and MC74AC74DG) feature expanded supply voltage (2V ~ 6V) but reduced operating temperature range (-40°C ~ 85°C). All three parts meet the 10ns propagation delay specification. Selection depends on application voltage and temperature requirements.

Q: Why is NLV74AC74DR2G not recommended as a substitute?

A: NLV74AC74DR2G does not meet the electrical specifications required for substitution. The propagation delay is 12.5ns, exceeding the 10ns maximum specification. Quiescent current is 40 µA, significantly higher than the 4 µA requirement. Although classified as Obsolete, this part exhibits degraded performance and is not suitable for replacement applications.

Q: What is the difference between Tube and Tape & Reel packaging?

A: Tube packaging (CD74AC74M, MC74AC74DG) is used for lower-volume applications and manual assembly processes. Tape & Reel packaging (CD74AC74M96, MC74AC74DR2G, NLV74AC74DR2G) is used for high-volume automated assembly. Both formats contain identical die and electrical specifications. Selection depends on manufacturing process and volume requirements.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All recommended substitute parts (CD74AC74M96, MC74AC74DR2G, MC74AC74DG) are ROHS3 Compliant and REACH Unaffected, maintaining regulatory compliance equivalent to the original CD74AC74M.

Q: Can MC74AC74DR2G be used in applications requiring -55°C operation?

A: No. MC74AC74DR2G has an operating temperature range of -40°C ~ 85°C and does not support -55°C operation. For applications requiring -55°C minimum temperature, CD74AC74M96 (operating range -55°C ~ 125°C) is the appropriate substitute.

Q: What is the input capacitance difference between CD74AC74M and onsemi substitutes?

A: CD74AC74M and CD74AC74M96 have 10 pF input capacitance. onsemi parts (MC74AC74DR2G, MC74AC74DG, NLV74AC74DR2G) have 4.5 pF input capacitance. Lower input capacitance reduces loading on driving circuits and may improve signal integrity in high-frequency applications.

Q: Are there any functional differences in the Set/Reset capabilities?

A: CD74AC74M, CD74AC74M96, MC74AC74DR2G, and MC74AC74DG all feature Set(Preset) and Reset functions. NLV74AC74DR2G lists function as "Standard" rather than "Set(Preset) and Reset," indicating functional differences that further disqualify it as a suitable substitute.