SN74AC573DWRG4 Equivalent & Substitute Parts

Part Overview

The SN74AC573DWRG4 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 classified as discontinued at DiGi Electronics, necessitating identification of equivalent alternatives for ongoing design requirements and production needs. The part operates across a 2V to 6V supply voltage range and is housed in a 20-SOIC surface mount package.

Key Parameters

Parameter	Value
Manufacturer Part Number	SN74AC573DWRG4
Manufacturer	Texas Instruments
Logic Type	D-Type Transparent Latch
Circuit Configuration	8:8
Output Type	Tri-State
Voltage - Supply	2V ~ 6V
Independent Circuits	1
Delay Time - Propagation	2.5ns
Current - Output High, Low	24mA, 24mA
Operating Temperature	-40°C ~ 85°C
Package / Case	20-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Product Status	Discontinued at DiGi Electronics

Substitute Part Grouping Explanation

Substitution eligibility for the SN74AC573DWRG4 is determined by strict alignment with the following critical parameters:

Logic Type: D-Type Transparent Latch
Circuit Configuration: 8:8
Output Type: Tri-State
Supply Voltage Range: 2V ~ 6V
Package / Case: 20-SOIC (0.295", 7.50mm Width)
Operating Temperature Range: -40°C ~ 85°C
Output Current Capability: 24mA (High and Low)

All identified substitute parts maintain these core electrical and mechanical specifications. Variations in propagation delay time and moisture sensitivity level do not preclude functional equivalence within standard application parameters.

Parameter Comparison

Parameter	SN74AC573DWRG4	SN74AC533DWR	SN74AC573DWR	MC74AC573DWR2G	MC74AC573DWG
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments	onsemi	onsemi
Logic Type	D-Type Transparent Latch	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	8:8
Output Type	Tri-State	Tri-State	Tri-State	Tri-State	Tri-State
Voltage - Supply	2V ~ 6V	2V ~ 6V	2V ~ 6V	2V ~ 6V	2V ~ 6V
Delay Time - Propagation	2.5ns	2ns	2.5ns	10ns	10ns
Current - Output High, Low	24mA, 24mA	24mA, 24mA	24mA, 24mA	24mA, 24mA	24mA, 24mA
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	20-SOIC	20-SOIC	20-SOIC	20-SOIC	20-SOIC
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Discontinued	Discontinued	Active	Active	Active
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	3 (168 Hours)	3 (168 Hours)

Engineering Selection Recommendations

For applications requiring immediate component availability, SN74AC573DWR is the primary recommended substitute. This part maintains identical electrical specifications and propagation delay characteristics while offering active product status and significantly higher inventory availability (5978 units). Both Texas Instruments variants ensure continuity with the original design without performance compromise.

The onsemi alternatives MC74AC573DWR2G and MC74AC573DWG provide functionally equivalent solutions with extended propagation delay (10ns versus 2.5ns). These parts are suitable for applications where timing margins accommodate the increased delay. The onsemi parts carry higher moisture sensitivity levels (MSL 3 versus MSL 1), requiring appropriate handling protocols during storage and assembly.

All substitute parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment with the original component.

Frequently Asked Questions (FAQ)

Q: Can SN74AC533DWR replace SN74AC573DWRG4 directly?

A: Yes. SN74AC533DWR is a parametric equivalent with identical supply voltage, output current, operating temperature, and package specifications. The 0.5ns faster propagation delay (2ns versus 2.5ns) presents no functional incompatibility. However, this part is also discontinued at DiGi Electronics.

Q: What is the primary difference between Texas Instruments and onsemi substitutes?

A: Texas Instruments variants (SN74AC573DWR) maintain the original 2.5ns propagation delay and MSL 1 moisture sensitivity. onsemi parts (MC74AC573DWR2G, MC74AC573DWG) feature 10ns propagation delay and MSL 3 moisture sensitivity. Both meet the core electrical and mechanical requirements.

Q: Are packaging differences significant between substitutes?

A: All substitutes use the 20-SOIC package. Packaging format variations (Cut Tape, Digi-Reel, Tape & Reel, Tube) affect supply chain logistics but not electrical or mechanical compatibility.

Q: Which substitute offers the best long-term availability?

A: SN74AC573DWR carries active product status with the highest inventory level (5978 units), making it the most suitable choice for sustained production requirements.

Q: Do onsemi parts require different handling procedures?

A: onsemi parts carry MSL 3 rating (168 hours) compared to MSL 1 (unlimited) for Texas Instruments variants. This requires adherence to moisture control protocols during storage and assembly operations.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message