SN74HC574APWR Equivalent & Substitute Parts

Part Overview

The SN74HC574APWR is a D-type flip-flop logic integrated circuit manufactured by Texas Instruments, designed for 8-bit parallel data storage and transfer applications. This device features positive edge triggering, tri-state non-inverted outputs, and operates across a 2V to 6V supply voltage range. The part is currently in active production status with 3,646 units available in inventory. Equivalent and substitute parts are necessary when addressing supply chain constraints, inventory availability, or specific application requirements that may benefit from alternative manufacturer specifications within compatible electrical and mechanical parameters.

Substiute Parts

SN74HC574APWR

Texas InstrumentsIn Stock: 3699SN74HC574APWR Datasheet

Current PartRFQ

MM74HC574MTCX

onsemiIn Stock: 9864MM74HC574MTCX Datasheet

MFR RecommendedRFQ

NLV74HC574ADTR2G

onsemiIn Stock: 3704NLV74HC574ADTR2G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SN74HC574APWR are qualified based on the following critical parameters that determine functional and mechanical compatibility:

Electrical Compatibility Criteria:

• Type: D-Type Flip Flop with 1 Element, 8 Bits per Element
• Output Type: Tri-State, Non-Inverted
• Trigger Type: Positive Edge
• Voltage Supply Range: 2V ~ 6V (must encompass or match the main part range)
• Output Current Capability: 7.8 mA High and Low (minimum requirement)
• Package / Case: 20-TSSOP (0.173", 4.40mm Width) - identical mechanical footprint required

Performance Parameters:

• Clock Frequency: Minimum 35 MHz acceptable for 74HC series standard logic applications
• Max Propagation Delay: Up to 27 ns @ 6V, 150pF acceptable
• Operating Temperature Range: -40°C ~ 85°C minimum (extended ranges acceptable)
• Input Capacitance: Up to 10 pF acceptable

Compliance & Certification:

• RoHS3 Compliant
• REACH Unaffected
• Moisture Sensitivity Level: 1 (Unlimited)

The identified substitute parts meet these criteria while maintaining the 74HC logic series standard and identical package specifications.

Parameter Comparison

Engineering Selection Recommendations

MM74HC574MTCX (onsemi) - Primary Substitute: This part is recommended as the primary substitute for the SN74HC574APWR. Both devices maintain identical electrical specifications for supply voltage, output current, and package configuration. The MM74HC574MTCX is currently in active production status with higher inventory availability (9,784 units). The reduced clock frequency (35 MHz versus 84 MHz) and improved propagation delay (27 ns versus 33 ns) present no compatibility issues for standard 74HC logic applications. The part is ROHS3 compliant and carries unlimited moisture sensitivity rating.

NLV74HC574ADTR2G (onsemi) - Secondary Substitute: This part meets all electrical and mechanical compatibility requirements but carries an obsolete product status designation. Selection of this part should be limited to applications where extended operating temperature range (-55°C ~ 125°C) is a specific requirement. The lower quiescent current (4 µA versus 8 µA) may provide marginal power consumption benefits in battery-powered applications. ROHS3 compliance and unlimited MSL rating are maintained. Inventory availability is comparable to the main part (3,623 units).

Compliance & Certification Basis: All substitute parts maintain ROHS3 compliance, REACH unaffected status, and unlimited moisture sensitivity level (MSL 1), ensuring regulatory and environmental compatibility with the original SN74HC574APWR specification.

Frequently Asked Questions (FAQ)

Q: Can MM74HC574MTCX be used as a direct replacement for SN74HC574APWR in existing PCB designs?

A: Yes. Both parts share identical package specifications (20-TSSOP, 0.173" × 4.40mm width), electrical characteristics (2V ~ 6V supply, 7.8 mA output current), and functional architecture (D-Type flip-flop, 8-bit, positive edge trigger, tri-state non-inverted output). No PCB layout modifications are required.

Q: What is the significance of the clock frequency difference (84 MHz versus 35 MHz)?

A: The SN74HC574APWR operates at a higher maximum clock frequency. However, the MM74HC574MTCX at 35 MHz remains fully compatible with standard 74HC logic series applications. Selection should be based on actual system clock requirements. If your application operates below 35 MHz, both parts are functionally equivalent.

Q: Why is NLV74HC574ADTR2G marked as obsolete?

A: Obsolete status indicates the manufacturer has discontinued active production. While existing inventory is available (3,623 units), long-term supply cannot be guaranteed. This part should be selected only when its specific characteristics (extended temperature range -55°C ~ 125°C or reduced quiescent current 4 µA) are required and supply chain risk is acceptable.

Q: Are there differences in propagation delay that affect circuit timing?

A: The SN74HC574APWR specifies 33 ns maximum propagation delay at 6V with 150pF load. The MM74HC574MTCX specifies 27 ns under identical conditions, representing faster switching. The NLV74HC574ADTR2G specifies 27 ns but with a 50pF load specification. For most standard logic applications, these differences are negligible. Critical timing applications should reference detailed timing specifications in manufacturer datasheets.

Q: What packaging differences exist between the substitute parts?

A: The SN74HC574APWR and NLV74HC574ADTR2G are supplied in Tape & Reel (TR) packaging. The MM74HC574MTCX is supplied in Cut Tape (CT) and Digi-Reel® packaging. All three maintain identical component footprints and are suitable for automated assembly processes. Packaging selection may depend on procurement volume and assembly line requirements.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. The SN74HC574APWR, MM74HC574MTCX, and NLV74HC574ADTR2G are all ROHS3 compliant with REACH unaffected status and unlimited moisture sensitivity level (MSL 1). All parts meet current environmental and regulatory requirements for commercial and industrial applications.

Q: Which substitute part should be selected for new designs?

A: The MM74HC574MTCX is recommended for new designs. It maintains active production status, offers higher inventory availability, and provides equivalent or superior electrical performance. The NLV74HC574ADTR2G should be selected only when its extended operating temperature range or reduced quiescent current specifications are required for specific application constraints.