SN74ACT374DW Equivalent & Substitute Parts

Part Overview

The SN74ACT374DW is a D-Type flip-flop logic integrated circuit manufactured by Texas Instruments, configured as a single element with 8-bit positive edge triggering in a 20-SOIC surface mount package. This device is classified as Last Time Buy, indicating discontinued production with limited inventory availability. Equivalent and substitute parts are necessary to ensure design continuity, support long-term production requirements, and provide alternative sourcing options from active product lines.

Key Parameters

Parameter	Value
Manufacturer Part Number	SN74ACT374DW
Manufacturer	Texas Instruments
Series	74ACT
Type	D-Type Flip Flop
Number of Elements	1
Number of Bits per Element	8
Output Type	Tri-State, Non-Inverted
Clock Frequency	160 MHz
Max Propagation Delay @ 5V, 50pF	8.5 ns
Trigger Type	Positive Edge
Voltage Supply Range	4.5V ~ 5.5V
Current Output High/Low	24 mA / 24 mA
Quiescent Current (Iq)	4 µA
Input Capacitance	4.5 pF
Operating Temperature Range	-40°C ~ 85°C
Package / Case	20-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Last Time Buy

Substitute Part Grouping Explanation

Substitution eligibility for the SN74ACT374DW is determined by the following critical parameters:

Functional Equivalence Requirements:

D-Type flip-flop architecture with 1 element, 8-bit configuration
Positive edge trigger mechanism
Tri-State, Non-Inverted output type
20-SOIC package form factor (0.295", 7.50mm Width)
Surface mount mounting type
4.5V ~ 5.5V supply voltage compatibility
Operating temperature range -40°C ~ 85°C

Performance Tolerance Parameters:

Clock frequency: 160 MHz or higher
Maximum propagation delay: 8.5 ns or lower @ 5V, 50pF
Output current capability: 24 mA minimum (both high and low)
Quiescent current: 8 µA maximum
Input capacitance: 4.5 pF

Compliance & Certification:

RoHS3 compliance required
REACH Unaffected status
ECCN: EAR99
HTSUS: 8542.39.0001

Substitute parts are categorized as MFR Recommended (direct functional equivalents with active product status) or Parametric Equivalents (meeting all electrical and mechanical requirements with minor performance variations).

Parameter Comparison

Part Number	Manufacturer	Product Status	Clock Frequency	Max Propagation Delay @ 5V, 50pF	Quiescent Current (Iq)	MSL	Packaging	Output Type
SN74ACT374DW	Texas Instruments	Last Time Buy	160 MHz	8.5 ns	4 µA	1 (Unlimited)	Tube	Tri-State, Non-Inverted
SN74ACT374DWR	Texas Instruments	Active	160 MHz	8.5 ns	4 µA	1 (Unlimited)	Cut Tape & Digi-Reel	Tri-State, Non-Inverted
MC74ACT374DWR2G	onsemi	Active	160 MHz	10 ns	8 µA	3 (168 Hours)	Tape & Reel	Tri-State, Non-Inverted
MC74ACT374DWG	onsemi	Active	160 MHz	10 ns	8 µA	3 (168 Hours)	Tube	Tri-State, Non-Inverted
MC74ACT574DWR2G	onsemi	Active	100 MHz	11 ns	8 µA	3 (168 Hours)	Tape & Reel	Tri-State, Non-Inverted
MC74ACT574DWG	onsemi	Active	100 MHz	11 ns	8 µA	3 (168 Hours)	Tube	Tri-State, Non-Inverted
MC74ACT377DWR2G	onsemi	Active	140 MHz	10 ns	8 µA	3 (168 Hours)	Tape & Reel	Non-Inverted
MC74ACT377DWG	onsemi	Obsolete	140 MHz	10 ns	8 µA	3 (168 Hours)	Tube	Non-Inverted

Engineering Selection Recommendations

Primary Substitute (Direct Replacement): SN74ACT374DWR from Texas Instruments is the recommended primary substitute. This part maintains identical electrical specifications (160 MHz clock frequency, 8.5 ns propagation delay, 4 µA quiescent current) and is in Active product status. The only difference is packaging format (Cut Tape & Digi-Reel versus Tube). Both parts carry MSL 1 rating and identical compliance certifications.

Secondary Substitutes (Parametric Equivalents): MC74ACT374DWR2G and MC74ACT374DWG from onsemi provide functional equivalence with acceptable performance variations. These parts maintain 160 MHz clock frequency and tri-state output configuration but exhibit slightly higher propagation delay (10 ns versus 8.5 ns) and quiescent current (8 µA versus 4 µA). Both are in Active product status with MSL 3 rating.

Alternative Substitutes (Performance Trade-offs): MC74ACT574DWR2G and MC74ACT574DWG from onsemi are functionally compatible but operate at reduced clock frequency (100 MHz) with increased propagation delay (11 ns). These parts are suitable for applications where maximum performance is not critical.

Not Recommended: MC74ACT377DWR2G and MC74ACT377DWG lack tri-state output capability (non-inverted output only) and are therefore not suitable for direct substitution. MC74ACT377DWG is Obsolete and should not be selected for new designs.

Frequently Asked Questions (FAQ)

Q: Can SN74ACT374DWR directly replace SN74ACT374DW? A: Yes. Both parts are electrically identical with matching clock frequency (160 MHz), propagation delay (8.5 ns), and quiescent current (4 µA). The difference is packaging format: SN74ACT374DWR is supplied in Cut Tape & Digi-Reel format while SN74ACT374DW is supplied in Tube format. Both are compatible with identical PCB footprints.

Q: What are the performance implications of using MC74ACT374DWR2G? A: MC74ACT374DWR2G maintains the same clock frequency (160 MHz) and tri-state output configuration but has slightly higher propagation delay (10 ns versus 8.5 ns) and quiescent current (8 µA versus 4 µA). For most applications operating below 160 MHz, these differences are negligible. Verify timing margins in your specific circuit design.

Q: Why is MC74ACT377DWG not recommended? A: MC74ACT377DWG lacks tri-state output capability, featuring only non-inverted output. This functional difference makes it incompatible with designs requiring tri-state bus control. Additionally, this part is Obsolete and should not be selected for new production.

Q: Are there supply voltage compatibility concerns with substitute parts? A: No. All substitute parts operate within the same 4.5V ~ 5.5V supply voltage range as the original SN74ACT374DW. All parts are fully compatible with standard 5V logic systems.

Q: What is the significance of MSL rating differences? A: The original SN74ACT374DW carries MSL 1 (Unlimited moisture sensitivity), while onsemi substitutes carry MSL 3 (168 hours). MSL 3 requires moisture bake-out procedures before reflow soldering if parts have been exposed to ambient humidity for extended periods. This is a manufacturing process consideration, not a functional limitation.

Q: Can MC74ACT574DWR2G be used as a substitute? A: MC74ACT574DWR2G is functionally compatible but operates at reduced performance (100 MHz clock frequency, 11 ns propagation delay). It is suitable only for applications where maximum clock frequency is not required. Verify that your circuit timing requirements are met before selection.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All listed substitute parts maintain RoHS3 compliance, REACH Unaffected status, ECCN EAR99, and HTSUS 8542.39.0001 classification, matching the original part's regulatory compliance profile.

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