PI74LPT373AS Equivalent & Substitute Parts

Part Overview

The PI74LPT373AS is a D-Type Transparent Latch logic IC manufactured by Diodes Incorporated, featuring an 8:8 channel configuration with tri-state output in a 20-SOIC package. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The part operates within a 2.7V to 3.6V supply voltage range with 1.5ns propagation delay and 24mA output drive capability.

Key Parameters

Parameter	Value
Manufacturer Part Number	PI74LPT373AS
Manufacturer	Diodes Incorporated
Logic Type	D-Type Transparent Latch
Circuit Configuration	8:8
Output Type	Tri-State
Voltage - Supply	2.7V ~ 3.6V
Delay Time - Propagation	1.5ns
Current - Output High, Low	24mA, 24mA
Operating Temperature	-40°C ~ 85°C
Package / Case	20-SOIC (0.295", 7.50mm Width)
Product Status	Obsolete
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitute parts for the PI74LPT373AS are qualified based on the following critical parameters:

Logic Type: D-Type Transparent Latch with 8:8 channel configuration
Output Type: Tri-State output capability
Package: 20-SOIC form factor (0.295", 7.50mm Width)
Propagation Delay: 1.5ns
Output Drive: 24mA high and low current capability
Operating Temperature Range: -40°C ~ 85°C
Supply Voltage Compatibility: Minimum 1.65V to 3.6V range (encompasses original 2.7V ~ 3.6V specification)

All listed substitute parts maintain functional equivalence through identical logic configuration, package form factor, and electrical performance characteristics. The 74LVC series substitutes provide enhanced RoHS3 compliance and active product status while preserving pin-for-pin compatibility and electrical specifications.

Parameter Comparison

Parameter	PI74LPT373AS	74LVC373AD,118	MC74LCX373DWR2G	SN74LVC373ADW	SN74LVC373ADWR
Manufacturer	Diodes Incorporated	NXP Semiconductors	onsemi	Texas Instruments	Texas Instruments
Logic Type	D-Type Transparent Latch	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	8:8
Output Type	Tri-State	Tri-State	Tri-State	Tri-State	Tri-State
Voltage - Supply	2.7V ~ 3.6V	Not specified	2V ~ 3.6V	1.65V ~ 3.6V	1.65V ~ 3.6V
Delay Time - Propagation	1.5ns	Not specified	1.5ns	1.5ns	1.5ns
Current - Output High, Low	24mA, 24mA	Not specified	24mA, 24mA	24mA, 24mA	24mA, 24mA
Operating Temperature	-40°C ~ 85°C	Not specified	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	20-SOIC	Not specified	20-SOIC	20-SOIC	20-SOIC
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	RoHS non-compliant	REACH Unaffected	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	3 (168 Hours)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Primary Substitutes (Recommended for New Designs)

SN74LVC373ADW and SN74LVC373ADWR from Texas Instruments are the preferred substitutes. Both parts maintain active product status, achieve ROHS3 compliance, and provide unlimited moisture sensitivity rating (MSL 1). The SN74LVC373ADW is supplied in Tube packaging, while SN74LVC373ADWR is supplied in Cut Tape with Digi-Reel format. Both support extended supply voltage range (1.65V ~ 3.6V) and maintain all critical electrical parameters.

Secondary Substitute (Alternative Option)

MC74LCX373DWR2G from onsemi provides functional equivalence with active product status and ROHS3 compliance. This part operates within 2V ~ 3.6V supply range and carries MSL 3 rating (168 hours), requiring controlled moisture handling during storage and assembly.

Compliance Consideration

74LVC373AD,118 from NXP Semiconductors is an active product with REACH Unaffected status. Detailed electrical specifications for this part are not provided in the reference data; verification against design requirements is necessary before selection.

Frequently Asked Questions (FAQ)

Q: Can PI74LPT373AS be directly replaced with any of the listed substitutes?

A: Yes. All listed substitute parts maintain pin-for-pin compatibility, identical 20-SOIC package form factor, and equivalent electrical performance. The 8:8 D-Type Transparent Latch configuration, tri-state output capability, 1.5ns propagation delay, and 24mA output drive are preserved across all substitutes.

Q: What is the primary reason for substitution?

A: The PI74LPT373AS is classified as obsolete. The listed substitutes are active products with ongoing manufacturing support and improved compliance certifications (ROHS3).

Q: Are there supply voltage compatibility concerns?

A: The original PI74LPT373AS operates at 2.7V ~ 3.6V. All substitute parts support this range. Texas Instruments parts (SN74LVC373ADW and SN74LVC373ADWR) extend the lower limit to 1.65V, providing additional design flexibility. The onsemi part (MC74LCX373DWR2G) operates at 2V ~ 3.6V, fully encompassing the original specification.

Q: What is the difference between SN74LVC373ADW and SN74LVC373ADWR?

A: Both parts are electrically identical. The primary difference is packaging format: SN74LVC373ADW is supplied in Tube, while SN74LVC373ADWR is supplied in Cut Tape with Digi-Reel format. Selection depends on assembly process requirements and inventory management preferences.

Q: Does moisture sensitivity affect part selection?

A: MC74LCX373DWR2G carries MSL 3 rating (168 hours), requiring controlled moisture exposure during storage and assembly. SN74LVC373ADW, SN74LVC373ADWR, and 74LVC373AD,118 carry MSL 1 rating (unlimited), eliminating moisture-related handling constraints. For standard manufacturing environments, MSL 1 parts are preferred.

Q: Are all substitutes RoHS compliant?

A: MC74LCX373DWR2G, SN74LVC373ADW, and SN74LVC373ADWR are ROHS3 compliant. The original PI74LPT373AS is RoHS non-compliant. 74LVC373AD,118 status is REACH Unaffected. For applications requiring RoHS compliance, select from the ROHS3 compliant options.

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