74ABT373CSC Equivalent & Substitute Parts

Part Overview

The 74ABT373CSC 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 new designs and ongoing production requirements. 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
Mounting Type	Surface Mount
Package / Case	20-SOIC
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the 74ABT373CSC are qualified based on the following critical parameters:

Logic Type & Circuit Configuration: All substitutes maintain D-Type Transparent Latch architecture with 8:8 circuit configuration
Electrical Specifications: Supply voltage (4.5V ~ 5.5V), output current ratings (32mA, 64mA), and operating temperature range (-40°C ~ 85°C) are identical across all qualified substitutes
Output Type: Tri-state output capability is preserved in all substitute parts
Package Compatibility: All substitutes are available in 20-SOIC or 20-SO surface mount packages with compatible pinouts
Series Designation: All parts belong to the 74ABT logic series

The substitutes listed are manufactured by Texas Instruments and carry active product status, providing long-term availability advantages over the obsolete onsemi original.

Parameter Comparison

Parameter	74ABT373CSC (onsemi)	SN74ABT373DW (TI)	SN74ABT373DWR (TI)	SN74ABT373NSR (TI)
Manufacturer	onsemi	Texas Instruments	Texas Instruments	Texas Instruments
Product Status	Obsolete	Active	Active	Active
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
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-SOIC (0.295", 7.50mm)	20-SOIC (0.295", 7.50mm)	20-SOIC (0.295", 7.50mm)	20-SOIC (0.209", 5.30mm)
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

SN74ABT373DW is suitable for applications requiring tube packaging with standard 20-SOIC form factor. This part maintains full electrical and mechanical compatibility with the original 74ABT373CSC and carries active product status with ROHS3 compliance.

SN74ABT373DWR is recommended for high-volume production environments utilizing tape and reel packaging. The increased inventory availability (5032 pcs) and active product status provide supply chain stability. ROHS3 compliance and identical electrical specifications ensure direct substitution capability.

SN74ABT373NSR offers a compact 20-SO package variant (0.209" width versus 0.295" width) while maintaining electrical equivalence. This option is applicable for space-constrained designs. Active product status and ROHS3 compliance are confirmed.

All three Texas Instruments substitutes are REACH compliant and carry identical ECCN and HTSUS classifications as the original part, supporting regulatory and compliance requirements.

Frequently Asked Questions (FAQ)

Q: Can SN74ABT373DW, SN74ABT373DWR, and SN74ABT373NSR be used interchangeably with 74ABT373CSC?

A: Yes, all three Texas Instruments parts are electrically equivalent to the 74ABT373CSC. They share identical logic type, circuit configuration, supply voltage, output current ratings, and operating temperature specifications. Pinout compatibility is maintained across all variants.

Q: What is the difference between SN74ABT373DW and SN74ABT373DWR?

A: Both parts are electrically identical and use the same 20-SOIC package. The primary difference is packaging format: SN74ABT373DW is supplied in tubes, while SN74ABT373DWR is supplied in tape and reel format. Selection depends on production volume and handling requirements.

Q: How does SN74ABT373NSR differ from the other substitutes?

A: SN74ABT373NSR uses a narrower 20-SO package (0.209" width) compared to the standard 20-SOIC packages (0.295" width) of the other substitutes. Electrical specifications remain identical. This variant is suitable for applications with space constraints, provided PCB layout accommodates the different package dimensions.

Q: Is there a propagation delay difference between the original and substitutes?

A: The 74ABT373CSC specifies 2.7ns propagation delay, while all Texas Instruments substitutes specify 4.6ns. This difference is within the same logic family performance envelope and does not affect functional compatibility in standard applications. Applications with critical timing requirements should evaluate this specification against system requirements.

Q: Are all substitutes RoHS compliant?

A: Yes, all three Texas Instruments substitutes carry ROHS3 compliance certification. The original 74ABT373CSC RoHS status is not specified in the provided data.

Q: What packaging options are available for production?

A: SN74ABT373DW is available in tube packaging for smaller quantities. SN74ABT373DWR is available in tape and reel format for automated assembly and high-volume production. SN74ABT373NSR is also available in tape and reel format with a compact package option.

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