CD74AC374ME4 Equivalent & Substitute Parts

Part Overview

The CD74AC374ME4 is a D-Type flip-flop logic integrated circuit manufactured by Texas Instruments, featuring 1 element with 8-bit positive edge triggering in a 20-SOIC surface mount package. This component operates across a supply voltage range of 1.5V to 5.5V with a maximum clock frequency of 125 MHz and propagation delay of 10.8ns at 5V with 50pF load. The part is currently in Last Time Buy status, making identification of equivalent and substitute components essential for design continuity and procurement planning.

Substiute Parts

CD74AC374ME4

Texas InstrumentsIn Stock: 1159CD74AC374ME4 Datasheet

Current PartRFQ

CD74AC374M

Harris CorporationIn Stock: 2098CD74AC374M Datasheet

MFR RecommendedRFQ

CD74AC374M96

Texas InstrumentsIn Stock: 1428CD74AC374M96 Datasheet

MFR RecommendedRFQ

MC74AC374DWR2G

onsemiIn Stock: 3778MC74AC374DWR2G Datasheet

DirectRFQ

MC74AC374DWG

onsemiIn Stock: 984MC74AC374DWG Datasheet

MFR RecommendedRFQ

MC74AC377DWR2G

onsemiIn Stock: 1739MC74AC377DWR2G Datasheet

MFR RecommendedRFQ

MC74AC574DWG

onsemiIn Stock: 2608MC74AC574DWG Datasheet

MFR RecommendedRFQ

MC74AC574DWR2G

onsemiIn Stock: 2232MC74AC574DWR2G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CD74AC374ME4 is determined by strict equivalence across the following critical parameters:

Mandatory Compatibility Parameters:

• 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
• Package / Case: 20-SOIC (0.295", 7.50mm Width)
• Mounting Type: Surface Mount

Performance Parameters (Allowable Variation):

• Clock Frequency: 95 MHz minimum
• Max Propagation Delay @ 5V, 50pF: 15.1ns maximum
• Voltage Supply Range: Must encompass 1.5V ~ 5.5V or be compatible subset
• Current Output High/Low: 24mA minimum
• Operating Temperature: Must support -55°C ~ 125°C or compatible range

Substitute parts are grouped into two categories: direct equivalents (identical base product number 74AC374 with tri-state output) and functional alternatives (74AC377 and 74AC574 variants with compatible electrical characteristics but different base product designations).

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalents (Base Product 74AC374):

CD74AC374M96 and MC74AC374DWR2G / MC74AC374DWG are the primary substitutes for CD74AC374ME4. All three maintain identical functional specifications with tri-state, non-inverted output configuration. CD74AC374M96 is Texas Instruments sourced and ROHS3 compliant with active product status, making it the preferred choice for new designs. MC74AC374DWR2G and MC74AC374DWG from onsemi are also active, ROHS3 compliant alternatives with superior clock frequency (155 MHz) and faster propagation delay (9.5ns), though they operate at reduced temperature range (-40°C ~ 85°C versus -55°C ~ 125°C).

Functional Alternatives:

MC74AC377DWR2G (base product 74AC377) is functionally compatible but lacks tri-state output capability, featuring non-inverted output only. This part is suitable only for applications not requiring tri-state bus interface functionality.

MC74AC574DWG and MC74AC574DWR2G (base product 74AC574) are functionally compatible with tri-state, non-inverted output but operate at reduced clock frequency (95 MHz) and are suitable only for applications with lower speed requirements.

Obsolete Part:

CD74AC374M from Harris Corporation is marked obsolete and RoHS non-compliant. This part should not be selected for new designs or long-term procurement.

Frequently Asked Questions (FAQ)

Q: Can MC74AC374DWR2G replace CD74AC374ME4 directly?

A: Yes. MC74AC374DWR2G is a direct functional equivalent with identical 8-bit D-type tri-state output configuration and 20-SOIC package. It is ROHS3 compliant and active. The primary difference is reduced operating temperature range (-40°C ~ 85°C versus -55°C ~ 125°C) and packaging format (Tape & Reel versus Tube). Verify temperature requirements before selection.

Q: What is the difference between CD74AC374M96 and MC74AC374DWR2G?

A: Both are direct equivalents with identical functional specifications. CD74AC374M96 is Texas Instruments sourced; MC74AC374DWR2G is onsemi sourced. MC74AC374DWR2G offers superior performance (155 MHz clock frequency, 9.5ns propagation delay) but operates at narrower temperature range. CD74AC374M96 maintains the original -55°C ~ 125°C operating range. Selection depends on temperature requirements and supplier availability.

Q: Why is CD74AC374M not recommended?

A: CD74AC374M is marked obsolete and RoHS non-compliant. It should not be used for new designs or long-term procurement strategies.

Q: Can MC74AC574DWG be used as a substitute?

A: MC74AC574DWG is functionally compatible with tri-state, non-inverted output and 20-SOIC package. However, it operates at reduced clock frequency (95 MHz versus 125 MHz). Use only if application speed requirements are below 95 MHz.

Q: What packaging formats are available?

A: Substitute parts are available in Tube, Tape & Reel (TR), and Cut Tape & Digi-Reel formats. CD74AC374ME4 is supplied in Tube format. Verify packaging requirements for automated assembly processes.

Q: Are all substitutes ROHS3 compliant?

A: All active substitute parts (CD74AC374M96, MC74AC374DWR2G, MC74AC374DWG, MC74AC377DWR2G, MC74AC574DWG, MC74AC574DWR2G) are ROHS3 compliant. CD74AC374M is RoHS non-compliant and obsolete.

Q: What is the difference between MC74AC377DWR2G and CD74AC374ME4?

A: MC74AC377DWR2G lacks tri-state output capability, featuring non-inverted output only. It is suitable only for applications that do not require tri-state bus interface functionality. All other electrical parameters are compatible.