74ABT573CSCX Equivalent & Substitute Parts

Part Overview

The 74ABT573CSCX is a D-Type Transparent Latch logic IC manufactured by onsemi, featuring 1 channel with 8:8 circuit configuration and tri-state output capability. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement continuity. The part operates within the 4.5V to 5.5V supply voltage range and is housed in a 20-SOIC surface mount package.

Key Parameters

Parameter	Value
Logic Type	D-Type Transparent Latch
Circuit Configuration	8:8
Output Type	Tri-State
Voltage - Supply	4.5V ~ 5.5V
Independent Circuits	1
Delay Time - Propagation	2.7ns
Current - Output High, Low	32mA, 64mA
Operating Temperature	-40°C ~ 85°C
Package / Case	20-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute parts for the 74ABT573CSCX are qualified based on the following critical parameters that determine functional and mechanical compatibility:

Core Electrical Parameters:

Logic Type: D-Type Transparent Latch
Circuit Configuration: 8:8
Output Type: Tri-State
Supply Voltage Range: 4.5V ~ 5.5V
Independent Circuits: 1
Output Current Ratings: 32mA (High), 64mA (Low)
Operating Temperature Range: -40°C ~ 85°C

Mechanical Parameters:

Mounting Type: Surface Mount
Package / Case: 20-SOIC form factor

All substitute parts listed maintain these electrical and mechanical specifications. Propagation delay variations within the specified range do not affect functional substitution. Packaging format (Tube, Cut Tape & Digi-Reel) represents distribution method only and does not impact circuit performance.

Parameter Comparison

Parameter	74ABT573CSCX (onsemi)	SN74ABT573ADW (TI)	SN74ABT573ADWR (TI)	SN74ABT573ANSR (TI)
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
Supply Voltage	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V
Independent Circuits	1	1	1	1
Propagation Delay	2.7ns	4ns	4ns	4ns
Output Current (High, Low)	32mA, 64mA	32mA, 64mA	32mA, 64mA	32mA, 64mA
Operating Temperature	-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 / Case	20-SOIC (0.295", 7.50mm)	20-SOIC (0.295", 7.50mm)	20-SOIC (0.295", 7.50mm)	20-SO (0.209", 5.30mm)
Product Status	Obsolete	Active	Active	Discontinued at DiGi Electronics
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitutes (Recommended):

SN74ABT573ADW and SN74ABT573ADWR are the preferred substitutes for the 74ABT573CSCX. Both parts are manufactured by Texas Instruments, maintain active product status, and carry ROHS3 compliance certification. These parts are electrically and mechanically identical to the original component, with identical package dimensions (20-SOIC, 0.295" width). The propagation delay specification of 4ns remains within acceptable operating parameters for applications designed around the 2.7ns original specification. SN74ABT573ADWR offers higher inventory availability (11,670 pcs) in Cut Tape & Digi-Reel packaging format, suitable for high-volume production environments.

Secondary Substitute (Package Consideration):

SN74ABT573ANSR is a Texas Instruments alternative with identical electrical specifications but features a narrower 20-SO package (0.209" width) compared to the standard 20-SOIC (0.295" width). This part is discontinued at DiGi Electronics and should be considered only when PCB layout constraints require the reduced package width. Mechanical compatibility with existing board designs must be verified before selection.

Frequently Asked Questions (FAQ)

Q: Can SN74ABT573ADW directly replace 74ABT573CSCX in existing designs?

A: Yes. Both parts share identical electrical specifications (supply voltage, output current, operating temperature, circuit configuration) and the same 20-SOIC package footprint. The propagation delay difference (4ns vs. 2.7ns) does not affect functional compatibility in standard applications.

Q: What is the difference between SN74ABT573ADW and SN74ABT573ADWR?

A: Both parts are electrically and mechanically identical. The difference is packaging format: ADW is supplied in Tube packaging, while ADWR is supplied in Cut Tape & Digi-Reel format. Selection depends on procurement and assembly requirements.

Q: Why is SN74ABT573ANSR listed as a substitute if it has a different package width?

A: SN74ABT573ANSR maintains all electrical specifications and uses the same 20-SO pin configuration. However, the narrower package width (0.209" vs. 0.295") requires PCB layout verification. This part is suitable only for designs where the reduced width is compatible with existing footprints or where board space constraints justify the change.

Q: Are all substitute parts ROHS3 compliant?

A: The Texas Instruments substitutes (SN74ABT573ADW, SN74ABT573ADWR, SN74ABT573ANSR) are ROHS3 compliant. The original 74ABT573CSCX RoHS status is not specified in the provided data.

Q: What is the REACH status of these parts?

A: All listed parts, including the original 74ABT573CSCX and all Texas Instruments substitutes, are REACH Unaffected.

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