SN74ACT373PW D-Type Transparent Latch Equivalent & Substitute Parts

Part Overview

The SN74ACT373PW is a D-Type Transparent Latch IC manufactured by Texas Instruments, featuring an 8:8 circuit configuration with tri-state output capability in a 20-TSSOP surface mount package. This part is currently discontinued at DiGi Electronics, making equivalent and substitute parts necessary for ongoing design support and production requirements. The device operates within a 4.5V to 5.5V supply voltage range with 8.5ns propagation delay and 24mA output drive capability.

Key Parameters

Parameter	Value
Logic Type	D-Type Transparent Latch
Circuit Configuration	8:8
Output Type	Tri-State
Supply Voltage Range	4.5V ~ 5.5V
Propagation Delay	8.5ns
Output Current (High/Low)	24mA / 24mA
Operating Temperature	-40°C ~ 85°C
Package Type	20-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the SN74ACT373PW is determined by strict equivalence across the following critical parameters:

Logic Type & Circuit Configuration: D-Type Transparent Latch with 8:8 circuit must be maintained
Output Type: Tri-State output capability is required
Package & Mounting: 20-TSSOP surface mount package is mandatory for PCB compatibility
Supply Voltage Compatibility: Parts must operate within or encompass the 4.5V ~ 5.5V range
Output Drive Capability: 24mA output current specification must be met
Operating Temperature Range: -40°C ~ 85°C minimum requirement
Compliance Standards: RoHS3 compliance and REACH unaffected status

The substitute parts identified below meet these criteria through direct functional equivalence or manufacturer-recommended alternatives within the 74ACT/74AC logic families.

Parameter Comparison

Parameter	SN74ACT373PW	SN74ACT373PWR	MC74ACT373DTR2G	MC74AC373DTR2G
Manufacturer	Texas Instruments	Texas Instruments	onsemi	onsemi
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 Range	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	2V ~ 6V
Propagation Delay	8.5ns	8.5ns	8.5ns	7.5ns
Output Current (High/Low)	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
Package / Case	20-TSSOP	20-TSSOP	20-TSSOP	20-TSSOP
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Discontinued at DiGi Electronics	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

SN74ACT373PWR (Texas Instruments) is the primary direct substitute for the discontinued SN74ACT373PW. Both parts are manufactured by Texas Instruments with identical electrical specifications and packaging. The only difference is the packaging format: SN74ACT373PWR is supplied in Tape & Reel (TR) configuration versus the original Tube packaging. This part maintains full compatibility with existing designs and carries Active product status with 3300 units in stock.

MC74ACT373DTR2G (onsemi) is a manufacturer-recommended alternative that provides identical electrical performance to the SN74ACT373PW. Manufactured by onsemi, this part meets all critical parameters including supply voltage, propagation delay, output current, and operating temperature range. It is supplied in Tape & Reel format and maintains Active product status with 3417 units available.

MC74AC373DTR2G (onsemi) is a compatible alternative within the 74AC logic family. This part differs in supply voltage range (2V ~ 6V versus 4.5V ~ 5.5V) and propagation delay (7.5ns versus 8.5ns). The wider voltage range and faster propagation delay make this part suitable for applications where these enhanced specifications are beneficial. All other critical parameters remain equivalent.

All substitute parts maintain RoHS3 compliance and REACH unaffected status, ensuring regulatory compliance for current manufacturing standards.

Frequently Asked Questions (FAQ)

Q: Can SN74ACT373PWR be used as a direct replacement for SN74ACT373PW?

A: Yes. SN74ACT373PWR is a direct functional equivalent manufactured by Texas Instruments with identical electrical specifications. The difference is packaging format: SN74ACT373PWR uses Tape & Reel packaging while SN74ACT373PW uses Tube packaging. Both parts are pin-compatible and electrically equivalent.

Q: What is the difference between the 74ACT and 74AC logic families?

A: The 74ACT series is designed for 4.5V ~ 5.5V supply voltage operation, while the 74AC series operates across a wider 2V ~ 6V range. The MC74AC373DTR2G has a faster propagation delay (7.5ns) compared to the 74ACT variants (8.5ns). Both families are functionally compatible for the D-Type Transparent Latch 8:8 configuration.

Q: Are all substitute parts available in the same 20-TSSOP package?

A: Yes. All substitute parts listed are available in the 20-TSSOP surface mount package with identical 0.173" width (4.40mm). PCB footprints are directly compatible across all alternatives.

Q: What is the significance of the Tape & Reel packaging format?

A: Tape & Reel (TR) packaging is standard for automated assembly processes and high-volume production. It provides better handling efficiency compared to Tube packaging. The electrical and functional performance of the component is identical; only the packaging and delivery format differ.

Q: Do all substitute parts meet current compliance requirements?

A: Yes. All substitute parts are RoHS3 compliant and REACH unaffected, meeting current regulatory standards for electronic component manufacturing and distribution.

Q: Which substitute part should be selected for new designs?

A: For new designs, SN74ACT373PWR or MC74ACT373DTR2G are recommended as both maintain Active product status and full compatibility with the original SN74ACT373PW specifications. MC74AC373DTR2G is suitable if the wider supply voltage range (2V ~ 6V) and faster propagation delay (7.5ns) provide design advantages.

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