SN74AC573PW Equivalent & Substitute Parts

Part Overview

The SN74AC573PW is a D-Type Transparent Latch logic IC manufactured by Texas Instruments, featuring an 8:8 circuit configuration with tri-state output capability. This component is designed for applications requiring transparent latch functionality in digital logic systems. The part is currently discontinued at DiGi Electronics, making equivalent substitute parts necessary for ongoing design requirements and production needs.

Key Parameters

Parameter	Value
Logic Type	D-Type Transparent Latch
Circuit Configuration	8:8
Output Type	Tri-State
Voltage Supply Range	2V ~ 6V
Independent Circuits	1
Delay Time - Propagation	2.5ns
Current Output High/Low	24mA / 24mA
Operating Temperature Range	-40°C ~ 85°C
Mounting Type	Surface Mount
Package Type	20-TSSOP (0.173", 4.40mm Width)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the SN74AC573PW are qualified based on the following critical parameters that determine functional and mechanical compatibility:

Logic Type: D-Type Transparent Latch
Circuit Configuration: 8:8
Output Type: Tri-State
Voltage Supply Range: 2V ~ 6V
Package Type: 20-TSSOP
Mounting Type: Surface Mount
Operating Temperature Range: -40°C ~ 85°C
RoHS Compliance: ROHS3 Compliant

All substitute parts listed maintain these core electrical and mechanical specifications, ensuring direct compatibility in applications designed for the SN74AC573PW.

Parameter Comparison

Parameter	SN74AC573PW	SN74AC573PWR	MC74AC573DTR2G
Manufacturer	Texas Instruments	Texas Instruments	onsemi
Product Status	Discontinued	Active	Active
Logic Type	D-Type Transparent Latch	D-Type Transparent Latch	D-Type Transparent Latch
Circuit Configuration	8:8	8:8	8:8
Output Type	Tri-State	Tri-State	Tri-State
Voltage Supply Range	2V ~ 6V	2V ~ 6V	2V ~ 6V
Independent Circuits	1	1	1
Delay Time - Propagation	2.5ns	2.5ns	10ns
Current Output High/Low	24mA / 24mA	24mA / 24mA	24mA / 24mA
Operating Temperature Range	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package Type	20-TSSOP	20-TSSOP	20-TSSOP
Packaging Format	Tube	Cut Tape & Digi-Reel	Tape & Reel
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

SN74AC573PWR (Texas Instruments) is the primary substitute for the discontinued SN74AC573PW. Both parts are manufactured by Texas Instruments and share identical electrical specifications, including propagation delay of 2.5ns. The SN74AC573PWR maintains active product status and is available in higher quantities. This part is recommended for applications requiring direct performance equivalence with the original specification.

MC74AC573DTR2G (onsemi) is a secondary substitute manufactured by onsemi. While maintaining all core functional parameters and compliance certifications, this part exhibits a propagation delay of 10ns compared to 2.5ns in the primary substitute. The MC74AC573DTR2G is suitable for applications where the extended propagation delay does not impact system timing requirements. This part is also actively manufactured and available in production quantities.

Both substitute parts maintain ROHS3 compliance and identical moisture sensitivity ratings, ensuring compatibility with current manufacturing and environmental standards.

Frequently Asked Questions (FAQ)

Q: Can SN74AC573PWR be used as a direct replacement for SN74AC573PW?

A: Yes. The SN74AC573PWR is a direct substitute with identical electrical specifications, including propagation delay (2.5ns), output current ratings (24mA), voltage supply range (2V ~ 6V), and package configuration (20-TSSOP). Both parts are manufactured by Texas Instruments and share the same base product number 74AC573.

Q: What is the difference between SN74AC573PWR and MC74AC573DTR2G?

A: The primary difference is propagation delay. The SN74AC573PWR has a propagation delay of 2.5ns, while the MC74AC573DTR2G has a propagation delay of 10ns. Both parts maintain identical voltage supply range, output current ratings, operating temperature range, and package type. The MC74AC573DTR2G is manufactured by onsemi rather than Texas Instruments.

Q: Is the MC74AC573DTR2G suitable for timing-critical applications?

A: The MC74AC573DTR2G can be used in applications where the 10ns propagation delay is acceptable. For applications requiring the faster 2.5ns propagation delay of the original SN74AC573PW, the SN74AC573PWR is the appropriate choice.

Q: Are all substitute parts available in the same package type?

A: Yes. All listed substitute parts use the 20-TSSOP package (0.173", 4.40mm Width) with surface mount mounting type. Packaging formats differ (Tube, Cut Tape & Digi-Reel, Tape & Reel), but the physical component package remains identical.

Q: Do the substitute parts meet the same compliance standards?

A: Yes. All substitute parts are ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited), matching the original SN74AC573PW specifications.

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