74ABT374CMSA Equivalent & Substitute Parts

Part Overview

The 74ABT374CMSA is a D-Type flip-flop logic integrated circuit manufactured by onsemi, featuring 1 element with 8-bit parallel data storage capability. This component operates as a positive edge-triggered flip-flop with tri-state, non-inverted outputs, designed for high-speed digital logic applications requiring synchronous data latching. The part is classified as obsolete, making equivalent substitute components necessary for new designs and ongoing production requirements. Substitute parts maintain functional equivalence while offering active product status and improved availability.

Substiute Parts

74ABT374CMSA

onsemiIn Stock: 291674ABT374CMSA Datasheet

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SN74ABT374ADBR

Texas InstrumentsIn Stock: 2166SN74ABT374ADBR Datasheet

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SN74ABT374APW

Texas InstrumentsIn Stock: 1368SN74ABT374APW Datasheet

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SN74ABT374APWR

Texas InstrumentsIn Stock: 2816SN74ABT374APWR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 74ABT374CMSA is determined by strict adherence to the following critical parameters:

Core Functional Parameters (Must Match):

• Series: 74ABT
• Type: D-Type Flip-Flop
• Number of Elements: 1
• Number of Bits per Element: 8
• Output Type: Tri-State, Non-Inverted
• Trigger Type: Positive Edge
• Clock Frequency: 200 MHz
• Voltage Supply Range: 4.5V ~ 5.5V
• Operating Temperature Range: -40°C ~ 85°C

Electrical Performance Parameters (Must Be Within Specification):

• Max Propagation Delay @ 5V, 50pF: 6.6 ns maximum (original: 5 ns)
• Current Output High / Low: 32 mA / 64 mA
• Input Capacitance: 4.6 pF to 5 pF

Package Compatibility: Substitutes are grouped by package type. The 74ABT374CMSA uses 20-SSOP packaging. Substitutes using 20-TSSOP packaging are functionally equivalent but require PCB layout verification due to dimensional differences (0.173" vs 0.209" width).

Packaging Format: Substitutes are available in Tape & Reel (TR) or Tube formats, which do not affect electrical or mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

SN74ABT374ADBR (Texas Instruments, 20-SSOP): This substitute maintains identical package dimensions to the 74ABT374CMSA, enabling direct PCB footprint compatibility without layout modifications. The part is active status with ROHS3 compliance. Propagation delay increases from 5 ns to 6.6 ns and quiescent current increases from 50 µA to 250 µA. These parameter shifts remain within acceptable operational margins for most 74ABT logic applications. Tape & Reel packaging supports high-volume production requirements.

SN74ABT374APW (Texas Instruments, 20-TSSOP, Tube): This substitute uses 20-TSSOP packaging with reduced physical width (0.173" vs 0.209"), requiring PCB layout verification and potential footprint redesign. Electrical specifications match SN74ABT374ADBR. Tube packaging is suitable for lower-volume or manual assembly operations.

SN74ABT374APWR (Texas Instruments, 20-TSSOP, Tape & Reel): This substitute combines 20-TSSOP packaging with Tape & Reel format, supporting automated assembly processes. Electrical performance and compliance certifications are identical to SN74ABT374APW. PCB layout verification is required due to package dimension differences.

All Texas Instruments substitutes provide active product status and ROHS3 compliance, addressing the obsolescence of the original onsemi component.

Frequently Asked Questions (FAQ)

Q: Can SN74ABT374ADBR be used as a direct replacement for 74ABT374CMSA without PCB modifications?

A: Yes. Both parts use identical 20-SSOP packaging with matching pin configurations and footprint dimensions (0.209", 5.30mm width). No PCB layout changes are required. Electrical parameter differences (propagation delay and quiescent current) fall within acceptable operational ranges for 74ABT logic circuits.

Q: What is the difference between SN74ABT374APW and SN74ABT374APWR?

A: Both parts are electrically identical Texas Instruments D-Type flip-flops with 20-TSSOP packaging. The primary difference is packaging format: APW is supplied in Tube format for manual or lower-volume assembly, while APWR is supplied in Tape & Reel format for automated pick-and-place assembly. Select based on production assembly requirements.

Q: Why do the Texas Instruments substitutes have higher quiescent current (250 µA vs 50 µA)?

A: Quiescent current variation between manufacturers reflects different semiconductor process technologies and design implementations. The 250 µA specification for Texas Instruments parts remains within acceptable limits for 74ABT logic applications and does not prevent functional substitution.

Q: Can I use 20-TSSOP substitutes (SN74ABT374APW or SN74ABT374APWR) on a PCB designed for 20-SSOP?

A: No. While both packages have 20 pins, the physical dimensions differ significantly (0.173" width for TSSOP vs 0.209" width for SSOP). PCB footprint redesign is required. Use SN74ABT374ADBR for direct footprint compatibility.

Q: Are all substitute parts RoHS compliant?

A: Yes. All Texas Instruments substitutes (SN74ABT374ADBR, SN74ABT374APW, SN74ABT374APWR) are ROHS3 compliant. The original onsemi part does not specify RoHS status.

Q: What is the maximum propagation delay difference between the original and substitute parts?

A: The original 74ABT374CMSA specifies 5 ns maximum propagation delay at 5V with 50pF load. All Texas Instruments substitutes specify 6.6 ns maximum under identical conditions. This 1.6 ns increase remains within acceptable timing margins for standard 74ABT logic applications operating at 200 MHz.