SN74LVC373AQPWREP Equivalent & Substitute Parts

Part Overview

The SN74LVC373AQPWREP is a D-Type Transparent Latch logic IC manufactured by Texas Instruments, designed for 8:8 channel configuration with tri-state output capability. This component operates across a supply voltage range of 1.65V to 3.6V and is housed in a 20-TSSOP surface mount package. The part maintains Active product status and is ROHS3 compliant with unlimited moisture sensitivity rating.

Equivalent and substitute parts are identified based on matching functional architecture, electrical performance parameters, and physical packaging specifications. Alternative components serve applications where supply chain availability, inventory levels, or specific manufacturer preferences necessitate component substitution while maintaining circuit performance and reliability.

Key Parameters

Parameter	Value
Logic Type	D-Type Transparent Latch
Circuit Configuration	8:8
Output Type	Tri-State
Voltage Supply Range	1.65V ~ 3.6V
Propagation Delay	1.5ns
Output Current (High/Low)	24mA / 24mA
Operating Temperature	-40°C ~ 125°C
Package Type	20-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the SN74LVC373AQPWREP are qualified based on the following electrical and mechanical compatibility criteria:

Primary Substitution Parameters:

Logic type and circuit configuration (D-Type Transparent Latch, 8:8)
Output type (Tri-State)
Package specification (20-TSSOP surface mount)
Propagation delay (1.5ns)
Output current capability (24mA minimum)
RoHS3 compliance status

Voltage Supply Compatibility: The SN74LVC373AQPWREP operates at 1.65V ~ 3.6V. Substitute parts operating at 2V ~ 3.6V are compatible within the overlapping voltage range (2V ~ 3.6V). Applications requiring operation below 2V require verification of circuit design parameters.

Temperature Range Consideration: The main part supports -40°C ~ 125°C operation. Substitute parts with -40°C ~ 85°C ratings are suitable for applications within the -40°C ~ 85°C window. Applications requiring operation above 85°C require alternative component selection.

Parameter Comparison

Parameter	SN74LVC373AQPWREP (TI)	MC74LCX373DTR2G (onsemi)	74LCX373MTC (Fairchild)	MC74LCX373DTG (onsemi)
Manufacturer	Texas Instruments	onsemi	Fairchild Semiconductor	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
Voltage Supply Range	1.65V ~ 3.6V	2V ~ 3.6V	2V ~ 3.6V	2V ~ 3.6V
Propagation Delay	1.5ns	1.5ns	1.5ns	1.5ns
Output Current (High/Low)	24mA / 24mA	24mA / 24mA	24mA / 24mA	24mA / 24mA
Operating Temperature	-40°C ~ 125°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package Type	20-TSSOP	20-TSSOP	20-TSSOP	20-TSSOP
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Not Specified	ROHS3 Compliant

Engineering Selection Recommendations

Primary Selection (Full Compatibility): The SN74LVC373AQPWREP remains the primary component choice for applications requiring the full operating temperature range of -40°C ~ 125°C and extended voltage supply operation down to 1.65V.

Substitute Selection (Restricted Temperature Range): MC74LCX373DTR2G (onsemi), 74LCX373MTC (Fairchild Semiconductor), and MC74LCX373DTG (onsemi) are qualified substitutes for applications operating within -40°C ~ 85°C temperature limits and 2V ~ 3.6V supply voltage range. All three substitute parts maintain ROHS3 compliance and identical electrical performance specifications within their rated operating conditions.

Packaging and Inventory Considerations: MC74LCX373DTR2G is supplied in Tape & Reel packaging; MC74LCX373DTG is supplied in Tube packaging; 74LCX373MTC is supplied in Bulk packaging. Selection between these substitutes may be determined by procurement requirements and inventory availability.

Compliance Status: All identified substitute parts maintain ROHS3 compliance and REACH Unaffected status, consistent with the main part specification.

Frequently Asked Questions (FAQ)

Q: Can MC74LCX373DTR2G replace SN74LVC373AQPWREP in all applications?

A: MC74LCX373DTR2G is compatible for applications operating within -40°C ~ 85°C and 2V ~ 3.6V. Applications requiring operation above 85°C or below 2V supply voltage require the SN74LVC373AQPWREP or alternative component selection.

Q: What is the primary difference between the main part and substitute parts?

A: The SN74LVC373AQPWREP supports extended operating temperature to 125°C and lower supply voltage operation to 1.65V. Substitute parts (MC74LCX373DTR2G, 74LCX373MTC, MC74LCX373DTG) operate within -40°C ~ 85°C and 2V ~ 3.6V ranges. All parts share identical logic function, circuit configuration, and electrical performance within their respective operating ranges.

Q: Are all substitute parts pin-compatible with the main part?

A: All identified substitute parts use the 20-TSSOP package with identical pinout configuration, enabling direct board-level substitution without layout modification.

Q: What packaging options are available for substitute parts?

A: MC74LCX373DTR2G is available in Tape & Reel; MC74LCX373DTG is available in Tube; 74LCX373MTC is available in Bulk. Selection depends on procurement volume and assembly process requirements.

Q: Do all parts meet RoHS compliance requirements?

A: SN74LVC373AQPWREP, MC74LCX373DTR2G, and MC74LCX373DTG are ROHS3 compliant. Fairchild Semiconductor 74LCX373MTC RoHS status is not specified in available documentation.

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