SN74HC373NG4 Equivalent & Substitute Parts

Part Overview

The SN74HC373NG4 is a D-Type Transparent Latch logic IC manufactured by Texas Instruments, featuring an 8:8 circuit configuration with tri-state output capability. This component is designed for digital logic applications requiring transparent latch functionality in a 20-pin DIP package. The part is currently discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing design support and procurement.

Substiute Parts

SN74HC373NG4

Texas InstrumentsIn Stock: 1088SN74HC373NG4 Datasheet

Current PartRFQ

SN74HC373N

Texas InstrumentsIn Stock: 3577SN74HC373N Datasheet

MFR RecommendedRFQ

SN74HC373AN

Texas InstrumentsIn Stock: 2287SN74HC373AN Datasheet

Parametric EquivalentRFQ

TC74HC373APF

Toshiba Semiconductor and StorageIn Stock: 21347TC74HC373APF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SN74HC373NG4 are qualified based on the following critical parameters that determine functional and mechanical compatibility:

• Logic Type & Circuit Configuration: All substitutes must be D-Type Transparent Latch ICs with 8:8 circuit configuration
• Output Type: Tri-state output capability is required
• Voltage Supply Range: Operating range of 2V ~ 6V minimum
• Package & Mounting: 20-DIP through-hole package with identical pin spacing (0.300", 7.62mm)
• Operating Temperature: -40°C ~ 85°C range support
• Output Current Specifications: 7.8mA output current capability (High and Low)

The three qualified substitutes meet all these parameters. Variations in propagation delay time (12ns vs 15ns) remain within acceptable logic timing tolerances for standard 74HC series applications.

Parameter Comparison

Engineering Selection Recommendations

SN74HC373N (Texas Instruments) — Manufacturer-recommended substitute with identical electrical specifications to the original SN74HC373NG4. Active product status ensures long-term availability. ROHS3 compliance maintained. Propagation delay matches the original specification at 15ns.

SN74HC373AN (Texas Instruments) — Parametric equivalent with improved propagation delay of 12ns, providing faster logic switching while maintaining all other electrical and mechanical specifications. Active product status. ROHS3 compliance maintained. Suitable for applications where reduced propagation delay is beneficial.

TC74HC373APF (Toshiba Semiconductor) — Cross-manufacturer equivalent from Toshiba with identical functional specifications and 12ns propagation delay. Active product status with highest inventory availability (21,318 units). RoHS compliant. Provides geographic and supply chain diversification for procurement strategies.

All three substitutes are pin-compatible, functionally equivalent, and suitable for direct replacement in through-hole PCB applications.

Frequently Asked Questions (FAQ)

Q: Can SN74HC373N be used as a direct replacement for SN74HC373NG4?

A: Yes. Both parts share identical logic type, circuit configuration, output type, voltage supply range, output current specifications, operating temperature range, and 20-DIP package dimensions. The SN74HC373N is the manufacturer-recommended substitute.

Q: What is the difference between SN74HC373AN and SN74HC373N?

A: Both are Texas Instruments D-Type Transparent Latch ICs with 8:8 configuration and tri-state output. The primary difference is propagation delay time: SN74HC373N specifies 15ns, while SN74HC373AN specifies 12ns. Both meet the 2V ~ 6V supply voltage and -40°C ~ 85°C operating temperature requirements.

Q: Is TC74HC373APF compatible with the original SN74HC373NG4?

A: Yes. The TC74HC373APF is a cross-manufacturer equivalent from Toshiba with identical pin configuration, logic type, circuit configuration, output type, voltage supply range, output current, and operating temperature range. The 20-DIP package dimensions are identical, enabling direct PCB replacement.

Q: Are there any compliance differences between the substitutes?

A: All three substitutes maintain RoHS compliance. SN74HC373N and SN74HC373AN are ROHS3 compliant, matching the original part. TC74HC373APF is RoHS compliant. All parts are EAR99 classified and REACH unaffected.

Q: Which substitute should be selected for new designs?

A: For new designs, any of the three active substitutes are appropriate. SN74HC373N provides specification matching with the original part. SN74HC373AN and TC74HC373APF offer improved propagation delay (12ns) if faster logic switching is required. TC74HC373APF provides supply chain diversification through a second manufacturer source.

Q: Are these parts suitable for high-temperature applications?

A: All substitutes operate across the -40°C ~ 85°C temperature range. Applications requiring operation beyond 85°C require evaluation of alternative product lines outside the 74HC series.