SN74AC373PW Equivalent & Substitute Parts

Part Overview

The SN74AC373PW 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
Propagation Delay Time	7.5ns
Output Current (High/Low)	24mA / 24mA
Operating Temperature Range	-40°C ~ 85°C
Package Type	20-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the SN74AC373PW are qualified based on strict electrical and mechanical parameter matching. The following criteria determine substitution eligibility:

Critical Matching Parameters:

Logic Type: D-Type Transparent Latch
Circuit Configuration: 8:8
Output Type: Tri-State
Voltage Supply Range: 2V ~ 6V
Propagation Delay Time: 7.5ns
Output Current Capability: 24mA (High and Low)
Operating Temperature Range: -40°C ~ 85°C
Package Type: 20-TSSOP
Mounting Type: Surface Mount

All substitute parts listed maintain identical electrical specifications and mechanical compatibility with the original SN74AC373PW, ensuring direct functional equivalence in circuit applications.

Parameter Comparison

Parameter	SN74AC373PW (Main)	SN74AC373PWR (Substitute)	MC74AC373DTR2G (Substitute)
Manufacturer	Texas Instruments	Texas Instruments	onsemi
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
Propagation Delay Time	7.5ns	7.5ns	7.5ns
Output Current (High/Low)	24mA / 24mA	24mA / 24mA	24mA / 24mA
Operating Temperature Range	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package Type	20-TSSOP	20-TSSOP	20-TSSOP
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Product Status	Discontinued at DiGi Electronics	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

SN74AC373PWR (Texas Instruments): This part is the direct Texas Instruments equivalent with active product status. It maintains identical electrical and mechanical specifications to the SN74AC373PW. The primary distinction is packaging format (Cut Tape & Digi-Reel versus Tube), with significantly higher inventory availability (50,200 units). This part is suitable for applications requiring continued Texas Instruments sourcing and support.

MC74AC373DTR2G (onsemi): This part is the manufacturer-recommended substitute from onsemi, offering equivalent functionality with active product status. It meets all electrical and mechanical requirements of the original part. The packaging format is Tape & Reel (TR), with moderate inventory availability (3,969 units). This option provides cross-manufacturer compatibility while maintaining full specification compliance.

Both substitute parts are ROHS3 compliant, REACH unaffected, and carry identical electrical performance characteristics. Selection between substitutes should be based on supply chain requirements, packaging preferences, and manufacturer sourcing strategy.

Frequently Asked Questions (FAQ)

Q: Can SN74AC373PWR be used as a direct replacement for SN74AC373PW? A: Yes. Both parts are Texas Instruments products with identical electrical specifications, circuit configuration, and package type (20-TSSOP). The primary difference is packaging format and product status (active versus discontinued).

Q: Is MC74AC373DTR2G electrically compatible with SN74AC373PW? A: Yes. The MC74AC373DTR2G maintains all critical electrical parameters including voltage supply range (2V ~ 6V), propagation delay (7.5ns), output current (24mA), and operating temperature range (-40°C ~ 85°C). The 20-TSSOP package ensures mechanical compatibility.

Q: What are the packaging differences between the substitute parts? A: SN74AC373PW is supplied in Tube packaging. SN74AC373PWR is available in Cut Tape & Digi-Reel format. MC74AC373DTR2G is supplied in Tape & Reel format. All three use the same 20-TSSOP package footprint.

Q: Are all substitute parts RoHS compliant? A: Yes. All parts listed (SN74AC373PW, SN74AC373PWR, and MC74AC373DTR2G) are ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited).

Q: Which substitute part should be selected for new designs? A: Both SN74AC373PWR and MC74AC373DTR2G are active products suitable for new designs. Selection depends on manufacturer preference and supply chain strategy. Both offer equivalent performance and compliance certifications.

Q: Do the substitute parts have the same pin configuration? A: Yes. All parts use the 20-TSSOP package with identical pin assignments, ensuring direct PCB compatibility without layout modifications.

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