SN74AC374PW Equivalent & Substitute Parts

Part Overview

The SN74AC374PW is a D-Type flip-flop logic integrated circuit manufactured by Texas Instruments, featuring 1 element with 8-bit capacity and tri-state, non-inverted output configuration. This device operates at a maximum clock frequency of 155 MHz with a propagation delay of 9.5 ns at 5V with 50 pF load. The part is currently in Last Time Buy status, indicating production discontinuation. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain reliability for applications requiring D-Type flip-flop functionality in the 74AC logic family.

Substiute Parts

SN74AC374PW

Texas InstrumentsIn Stock: 1181SN74AC374PW Datasheet

Current PartRFQ

SN74AC374PWR

Texas InstrumentsIn Stock: 1951SN74AC374PWR Datasheet

MFR RecommendedRFQ

MC74AC374DTR2G

onsemiIn Stock: 3574MC74AC374DTR2G Datasheet

MFR RecommendedRFQ

MC74AC377DTG

onsemiIn Stock: 782MC74AC377DTG Datasheet

MFR RecommendedRFQ

MC74AC377DTR2G

onsemiIn Stock: 3640MC74AC377DTR2G Datasheet

MFR RecommendedRFQ

MC74AC574DTR2G

onsemiIn Stock: 17818MC74AC574DTR2G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SN74AC374PW are grouped based on strict electrical and mechanical compatibility criteria. The primary substitution logic is determined by the following parameters:

Critical Matching Parameters:

• Base product number (74AC374 or functionally equivalent 74AC logic family)
• Package type (20-TSSOP surface mount)
• Output configuration (Tri-State, Non-Inverted)
• Voltage supply range (2V to 6V)
• Operating temperature range (-40°C to 85°C)
• Trigger type (Positive Edge)
• Number of elements (1) and bits per element (8)

Acceptable Variation Parameters:

• Clock frequency (minimum 95 MHz acceptable for 74AC logic family)
• Propagation delay (up to 10 ns acceptable)
• Quiescent current (up to 8 µA acceptable)
• Packaging format (Tube, Cut Tape, Tape & Reel)

Parts meeting these criteria are direct substitutes. Parts with different base product numbers (74AC377, 74AC574) or output configurations are listed as cross-functional alternatives within the 74AC logic family.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Direct Replacement):

SN74AC374PWR and MC74AC374DTR2G are direct functional equivalents to the SN74AC374PW. Both maintain the 74AC374 base product number, tri-state non-inverted output configuration, and identical electrical specifications including 155 MHz clock frequency and 9.5 ns propagation delay. SN74AC374PWR is manufactured by Texas Instruments with Active product status, ensuring long-term availability. MC74AC374DTR2G is manufactured by onsemi with Active status and higher inventory availability (3480 pcs). Both parts are ROHS3 compliant and suitable for direct pin-compatible replacement.

Secondary Alternatives (Functional Compatibility):

MC74AC377DTG and MC74AC377DTR2G are 74AC377 base product variants with non-inverted output configuration. These parts operate at 140 MHz maximum clock frequency and 10 ns propagation delay, representing acceptable performance variation within the 74AC logic family. However, the 74AC377 base product number indicates functional differences in control logic compared to the 74AC374. These parts are suitable only when application requirements do not depend on the specific control architecture of the 74AC374.

MC74AC574DTR2G is a 74AC574 variant with tri-state non-inverted output matching the SN74AC374PW output configuration. This part operates at 95 MHz maximum clock frequency, representing the lowest performance specification among available substitutes. The 74AC574 base product number indicates different internal architecture. This part is suitable only for applications with clock frequency requirements below 95 MHz.

Packaging Considerations:

Selection between Tube, Cut Tape & Digi-Reel, Cut Tape, and Tape & Reel packaging formats depends on procurement and assembly requirements. All formats are mechanically and electrically compatible within the 20-TSSOP package specification.

Frequently Asked Questions (FAQ)

Q: Can SN74AC374PWR directly replace SN74AC374PW?

A: Yes. SN74AC374PWR is a direct substitute manufactured by Texas Instruments with identical electrical specifications, package type, and output configuration. The only difference is packaging format (Cut Tape & Digi-Reel versus Tube) and product status (Active versus Last Time Buy).

Q: What is the difference between 74AC374 and 74AC377 base product numbers?

A: The 74AC374 and 74AC377 are distinct product families within the 74AC logic series with different internal control architectures. While both are 8-bit D-Type flip-flops with similar electrical characteristics, they are not functionally interchangeable. Substitution between these families is only acceptable when application-specific control logic requirements are verified as compatible.

Q: Why does MC74AC374DTR2G have higher quiescent current (8 µA) than SN74AC374PW (4 µA)?

A: Quiescent current variation within the specified range reflects manufacturing process differences between Texas Instruments and onsemi. The 8 µA specification for onsemi parts remains within acceptable operating parameters for 74AC logic family devices and does not affect functional compatibility for most applications.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance, ensuring compatibility with environmental and regulatory requirements equivalent to the original SN74AC374PW.

Q: What is the significance of product status (Last Time Buy versus Active)?

A: Last Time Buy status indicates the SN74AC374PW is no longer in production. Active status for substitute parts ensures continued manufacturing and long-term supply availability. For new designs or production planning, Active status parts are recommended.

Q: Can I use MC74AC574DTR2G as a substitute if my application requires 155 MHz operation?

A: No. MC74AC574DTR2G operates at a maximum clock frequency of 95 MHz, which is insufficient for applications requiring 155 MHz operation. SN74AC374PWR or MC74AC374DTR2G must be used for 155 MHz applications.

Q: Are all substitute parts available in 20-TSSOP package?

A: Yes. All listed substitute parts are manufactured in the 20-TSSOP (0.173", 4.40mm Width) surface mount package, ensuring mechanical and pin compatibility with the original SN74AC374PW.