SN74AC374PWR Equivalent & Substitute Parts

Part Overview

The SN74AC374PWR is an active D-Type flip-flop logic integrated circuit manufactured by Texas Instruments. This 8-bit positive edge-triggered flip-flop operates across a 2V to 6V supply range with tri-state, non-inverted outputs. The device is housed in a 20-TSSOP surface mount package and is ROHS3 compliant with unlimited moisture sensitivity rating. Equivalent and substitute parts are identified when design requirements necessitate alternative sourcing, packaging formats, or when primary inventory is unavailable.

Substiute Parts

SN74AC374PWR

Texas InstrumentsIn Stock: 1951SN74AC374PWR Datasheet

Current PartRFQ

MC74AC377DTG

onsemiIn Stock: 782MC74AC377DTG Datasheet

MFR RecommendedRFQ

MC74AC377DTR2G

onsemiIn Stock: 3640MC74AC377DTR2G Datasheet

MFR RecommendedRFQ

MC74AC574DTR2G

onsemiIn Stock: 17818MC74AC574DTR2G Datasheet

MFR RecommendedRFQ

MC74AC374DTR2G

onsemiIn Stock: 3574MC74AC374DTR2G Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SN74AC374PWR are classified based on the following substitution criteria:

Manufacturer Recommended Substitutes maintain identical or equivalent electrical performance within the 74AC logic family. These parts share the same functional characteristics: D-Type flip-flop architecture, 8-bit configuration, positive edge triggering, tri-state output capability, and 20-TSSOP package format. Substitution is valid when supply voltage range (2V ~ 6V), output current ratings (24 mA), and operating temperature range (-40°C ~ 85°C) are maintained.

Parametric Equivalents are parts that meet the core electrical requirements but may originate from different manufacturers or packaging formats. These parts preserve critical parameters including bit width, output type, trigger mechanism, and package footprint while potentially differing in clock frequency or quiescent current specifications within acceptable operational margins.

Key Parameters Determining Substitution:

• Output Type: Tri-State, Non-Inverted
• Number of Bits: 8
• Trigger Type: Positive Edge
• Package: 20-TSSOP
• Supply Voltage Range: 2V ~ 6V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount

Parameter Comparison

Engineering Selection Recommendations

MC74AC374DTR2G (Parametric Equivalent): This onsemi part is a direct parametric equivalent to the SN74AC374PWR. Both devices share identical clock frequency (155 MHz), propagation delay (9.5 ns), and tri-state output configuration. The primary difference is quiescent current (8 µA versus 4 µA), which represents a minor increase in standby power consumption. This part is suitable for applications where the Texas Instruments source is unavailable and packaging format (Cut Tape) is acceptable.

MC74AC574DTR2G (Manufacturer Recommended Substitute): This onsemi part maintains tri-state, non-inverted output architecture and identical propagation delay (9.5 ns). Clock frequency is reduced to 95 MHz, which is acceptable for applications not requiring the full 155 MHz performance of the main part. Quiescent current is 8 µA. This part is available in higher inventory (17,800 pcs) in Tape & Reel packaging format.

MC74AC377DTR2G and MC74AC377DTG (Manufacturer Recommended Substitutes): These onsemi parts differ from the main part in output type (non-inverted without tri-state capability). Clock frequency is 140 MHz with 10 ns propagation delay. These parts are suitable only for applications where tri-state output control is not required. MC74AC377DTG is available in Tube packaging; MC74AC377DTR2G is available in Tape & Reel format (3,600 pcs).

All substitute parts maintain ROHS3 compliance, MSL 1 rating, and identical operating temperature range (-40°C ~ 85°C). Selection should be based on specific application requirements for output type, clock frequency, and packaging format availability.

Frequently Asked Questions (FAQ)

Q: Can MC74AC377DTR2G replace SN74AC374PWR directly?

A: MC74AC377DTR2G is not a direct replacement. While both are 8-bit D-Type flip-flops in 20-TSSOP packages, the MC74AC377 lacks tri-state output capability. Use this part only if your application does not require tri-state output control.

Q: What is the difference between MC74AC374DTR2G and MC74AC574DTR2G?

A: Both parts provide tri-state, non-inverted outputs in 20-TSSOP packages. MC74AC374DTR2G operates at 155 MHz with 9.5 ns propagation delay. MC74AC574DTR2G operates at 95 MHz with identical 9.5 ns propagation delay. Select MC74AC374DTR2G for applications requiring higher clock frequency performance.

Q: Are packaging format differences significant for substitution?

A: Yes. SN74AC374PWR is supplied in Cut Tape (CT) format. MC74AC374DTR2G is also Cut Tape. MC74AC574DTR2G and MC74AC377DTR2G are supplied in Tape & Reel (TR) format. MC74AC377DTG is supplied in Tube format. Verify your assembly process compatibility with the packaging format before selection.

Q: Does quiescent current difference affect circuit performance?

A: The quiescent current difference between SN74AC374PWR (4 µA) and substitute parts (8 µA) affects standby power consumption only. This difference is negligible in most applications and does not impact functional performance or signal integrity.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, matching the compliance profile of the SN74AC374PWR.

Q: Can I use MC74AC574DTR2G in a high-frequency application requiring 155 MHz operation?

A: No. MC74AC574DTR2G is rated for 95 MHz maximum clock frequency. For applications requiring 155 MHz operation, use SN74AC374PWR or MC74AC374DTR2G.