74ABT573ADB,112 Equivalent & Substitute Parts

Part Overview

The 74ABT573ADB,112 is a D-Type Transparent Latch logic IC manufactured by NXP Semiconductors in a 20-SSOP surface mount package. This component features an 8:8 circuit configuration with tri-state output capability, designed for digital logic applications requiring transparent latch functionality.

The 74ABT573ADB,112 is classified as obsolete. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support ongoing production or maintenance requirements for systems utilizing this component.

Key Parameters

Parameter	Value
Manufacturer Part Number	74ABT573ADB,112
Manufacturer	NXP Semiconductors
Logic Type	D-Type Transparent Latch
Circuit Configuration	8:8
Output Type	Tri-State
Voltage Supply Range	4.5V ~ 5.5V
Independent Circuits	1
Propagation Delay Time	3.3ns
Output Current High/Low	32mA / 64mA
Operating Temperature Range	-40°C ~ 85°C
Mounting Type	Surface Mount
Package Type	20-SSOP
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute parts for the 74ABT573ADB,112 are qualified based on the following criteria:

Mandatory Matching Parameters:

Logic Type: D-Type Transparent Latch
Circuit Configuration: 8:8
Output Type: Tri-State
Voltage Supply Range: 4.5V ~ 5.5V
Independent Circuits: 1
Operating Temperature Range: -40°C ~ 85°C
RoHS Status: ROHS3 Compliant

Allowable Variations:

Manufacturer: Different manufacturers (Texas Instruments) producing equivalent logic ICs
Propagation Delay Time: Substitute parts may have equal or faster propagation delay (4ns is acceptable as it meets or exceeds the 3.3ns specification)
Package Type: Variations within the 20-pin SSOP/TSSOP family are acceptable for surface mount compatibility
Packaging Format: Cut Tape, Tube, or Tape & Reel formats are interchangeable based on procurement requirements
Product Status: Active status substitutes are preferred for long-term availability

Parameter Comparison

Parameter	74ABT573ADB,112 (NXP)	SN74ABT573ADBR (TI)	SN74ABT573APW (TI)	SN74ABT573APWR (TI)
Manufacturer	NXP Semiconductors	Texas Instruments	Texas Instruments	Texas Instruments
Logic Type	D-Type Transparent Latch	D-Type Transparent Latch	D-Type Transparent Latch	D-Type Transparent Latch
Circuit Configuration	8:8	8:8	8:8	8:8
Output Type	Tri-State	Tri-State	Tri-State	Tri-State
Voltage Supply Range	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V
Independent Circuits	1	1	1	1
Propagation Delay Time	3.3ns	4ns	4ns	4ns
Output Current High/Low	32mA / 64mA	32mA / 64mA	32mA / 64mA	32mA / 64mA
Operating Temperature Range	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package Type	20-SSOP	20-SSOP	20-TSSOP	20-TSSOP
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active	Active

Engineering Selection Recommendations

Primary Substitute: SN74ABT573ADBR (Texas Instruments)

The SN74ABT573ADBR is the most direct substitute for the 74ABT573ADB,112. Both components use the 20-SSOP package, ensuring identical PCB footprint compatibility. The SN74ABT573ADBR maintains all electrical specifications and is classified as Active, providing long-term availability and supply chain stability. This part is available in Cut Tape packaging format.

Alternative Substitutes: SN74ABT573APW and SN74ABT573APWR (Texas Instruments)

The SN74ABT573APW and SN74ABT573APWR are functionally equivalent alternatives that use the 20-TSSOP package variant. Both maintain identical electrical performance and are Active products. The primary difference is packaging format: SN74ABT573APW is supplied in Tube format, while SN74ABT573APWR is supplied in Tape & Reel format. These parts require PCB layout verification to confirm 20-TSSOP footprint compatibility with existing designs.

Compliance and Certification:

All substitute parts maintain ROHS3 compliance and REACH unaffected status, matching the original component's environmental and regulatory certifications. All parts are classified under ECCN EAR99 and HTSUS 8542.39.0001.

Frequently Asked Questions (FAQ)

Q: Can the SN74ABT573ADBR be used as a direct replacement for the 74ABT573ADB,112?

A: Yes. The SN74ABT573ADBR is a direct substitute. Both components share identical package type (20-SSOP), electrical specifications, and functional characteristics. The primary difference is manufacturer (Texas Instruments vs. NXP) and product status (Active vs. Obsolete).

Q: What is the difference between the 20-SSOP and 20-TSSOP packages?

A: Both are surface mount packages with 20 pins. The 20-SSOP has a body width of 0.209" (5.30mm), while the 20-TSSOP has a body width of 0.173" (4.40mm). The TSSOP is a thinner variant. PCB footprints differ between these packages and must be verified for compatibility before substitution.

Q: Are the propagation delay differences between 3.3ns and 4ns significant?

A: The substitute parts have a propagation delay of 4ns compared to the original 3.3ns. This represents a 0.7ns increase. For most digital logic applications, this difference is within acceptable timing margins. System-level timing analysis should confirm compatibility with specific circuit requirements.

Q: Which substitute part should I select for new production?

A: For new production, select based on packaging requirements and supply chain preferences. The SN74ABT573ADBR (20-SSOP, Cut Tape) provides the closest package match. The SN74ABT573APWR (20-TSSOP, Tape & Reel) is suitable for high-volume automated assembly. All three substitutes are Active products with equivalent long-term availability.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts listed are ROHS3 compliant and REACH unaffected, matching the environmental compliance status of the original 74ABT573ADB,112.

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