74ABT373CMTC Equivalent & Substitute Parts

Part Overview

The 74ABT373CMTC is a D-Type Transparent Latch logic IC manufactured by onsemi, featuring an 8:8 circuit configuration with tri-state output capability in a 20-TSSOP surface mount package. This component is classified as obsolete, making identification of active equivalent parts essential for ongoing design support and procurement continuity. The part operates within the 4.5V to 5.5V supply voltage range and is suitable for applications requiring transparent latch functionality with tri-state output control.

Key Parameters

Parameter	Value
Manufacturer Part Number	74ABT373CMTC
Manufacturer	onsemi
Logic Type	D-Type Transparent Latch
Circuit Configuration	8:8
Output Type	Tri-State
Voltage - Supply	4.5V ~ 5.5V
Package / Case	20-TSSOP (0.173", 4.40mm Width)
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Product Status	Obsolete
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the 74ABT373CMTC is determined by strict equivalence across the following electrical and mechanical parameters:

Logic Type: D-Type Transparent Latch
Circuit Configuration: 8:8
Output Type: Tri-State
Voltage - Supply: 4.5V ~ 5.5V
Operating Temperature: -40°C ~ 85°C
Independent Circuits: 1
Current - Output High, Low: 32mA, 64mA
Mounting Type: Surface Mount
Base Product Number: 74ABT373
Moisture Sensitivity Level: 1 (Unlimited)

All identified substitute parts maintain these core electrical specifications. Variations in propagation delay time (2.7ns vs. 4.6ns) and package case dimensions remain within acceptable tolerance for functional equivalence. Substitute parts are sourced from Texas Instruments and carry active product status with RoHS3 compliance certification.

Parameter Comparison

Parameter	74ABT373CMTC (onsemi)	SN74ABT373DBR (TI)	SN74ABT373PW (TI)	SN74ABT373PWR (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
Voltage - Supply	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V
Independent Circuits	1	1	1	1
Delay Time - Propagation	2.7ns	4.6ns	4.6ns	4.6ns
Current - Output 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-TSSOP (0.173", 4.40mm Width)	20-SSOP (0.209", 5.30mm Width)	20-TSSOP (0.173", 4.40mm Width)	20-TSSOP (0.173", 4.40mm Width)
Product Status	Obsolete	Active	Active	Active
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

For applications currently using the obsolete 74ABT373CMTC, the following Texas Instruments alternatives are recommended based on product status and compliance certifications:

SN74ABT373PW and SN74ABT373PWR are preferred substitutes. Both maintain identical package geometry (20-TSSOP, 0.173" width) and electrical specifications. These parts carry active product status and ROHS3 compliance certification. The primary distinction between these two is packaging format: SN74ABT373PW is supplied in Tube packaging, while SN74ABT373PWR is supplied in Tape & Reel format. Selection between these two should be based on procurement and assembly requirements.

SN74ABT373DBR is a functional equivalent with active product status and ROHS3 compliance. This part uses a 20-SSOP package (0.209" width) instead of the 20-TSSOP package. PCB layout modification is required for this substitution due to package case dimension differences. This option is suitable only when PCB redesign is feasible.

All three substitute parts demonstrate electrical equivalence across supply voltage, operating temperature range, output current specifications, and circuit configuration. The propagation delay increase from 2.7ns to 4.6ns does not affect functional compatibility in standard latch applications.

Frequently Asked Questions (FAQ)

Q: Can SN74ABT373DBR be used as a direct drop-in replacement for 74ABT373CMTC?

A: SN74ABT373DBR is electrically equivalent but not a direct drop-in replacement. The package case differs (20-SSOP vs. 20-TSSOP), resulting in different footprint dimensions (0.209" vs. 0.173" width). PCB layout modification is required.

Q: What is the difference between SN74ABT373PW and SN74ABT373PWR?

A: Both parts are electrically and mechanically identical. The difference is packaging format: SN74ABT373PW is supplied in Tube packaging for manual assembly or small-volume applications, while SN74ABT373PWR is supplied in Tape & Reel format for automated assembly processes.

Q: Are all substitute parts RoHS compliant?

A: Yes. All three Texas Instruments substitute parts (SN74ABT373DBR, SN74ABT373PW, SN74ABT373PWR) carry ROHS3 compliance certification.

Q: Does the propagation delay difference (2.7ns vs. 4.6ns) affect circuit performance?

A: The propagation delay increase from 2.7ns to 4.6ns remains within acceptable tolerance for D-Type Transparent Latch applications. Functional compatibility is maintained across standard operating conditions.

Q: What is the Moisture Sensitivity Level (MSL) for substitute parts?

A: All substitute parts maintain MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.

Q: Can I use these parts interchangeably in my design?

A: SN74ABT373PW and SN74ABT373PWR are fully interchangeable with the original 74ABT373CMTC from an electrical and mechanical standpoint, requiring no design modifications. SN74ABT373DBR requires PCB layout modification due to package case differences.

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