74HCT373N Equivalent & Substitute Parts

Part Overview

The 74HCT373N is a D-Type Transparent Latch logic IC manufactured by NXP USA Inc., configured as a single-channel 8:8 circuit with tri-state output in a 20-DIP package. This component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system support and new design implementations. The part operates within the 4.5V to 5.5V supply voltage range and is suitable for through-hole mounting applications requiring transparent latch functionality.

Substiute Parts

74HCT373N,652

NXP USA Inc.In Stock: 71274HCT373N,652 Datasheet

Current PartRFQ

CD74HCT373E

Texas InstrumentsIn Stock: 2261CD74HCT373E Datasheet

DirectRFQ

SN74HCT373N

Texas InstrumentsIn Stock: 4743SN74HCT373N Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 74HCT373N are qualified based on the following criteria:

• Logic Type & Circuit Configuration: All substitutes must implement D-Type Transparent Latch functionality with 8:8 circuit configuration
• Output Characteristics: Tri-state output capability with matching current ratings (6mA high and low)
• Supply Voltage Compatibility: Operating range of 4.5V ~ 5.5V
• Package Compatibility: 20-DIP form factor with 0.300" (7.62mm) pitch for direct board-level substitution
• Electrical Performance: Propagation delay and temperature operating range must support the application requirements
• Compliance & Status: RoHS3 compliance and active product status preferred for long-term availability

The two qualified substitutes—CD74HCT373E (Texas Instruments) and SN74HCT373N (Texas Instruments)—meet all mandatory electrical and mechanical parameters while offering improved availability compared to the obsolete NXP part.

Parameter Comparison

Engineering Selection Recommendations

Both CD74HCT373E and SN74HCT373N are active-status components from Texas Instruments with full RoHS3 compliance, providing superior long-term availability compared to the obsolete NXP 74HCT373N.

CD74HCT373E offers the widest operating temperature range (-55°C ~ 125°C) and is suitable for applications requiring extended low-temperature performance. This part is supplied in tube packaging.

SN74HCT373N maintains the original temperature operating range (-40°C ~ 85°C) of the NXP part and provides a propagation delay of 25ns, positioned between the original 14ns specification and the CD74HCT373E's 35ns. This part is also supplied in tube packaging.

Both substitutes are electrically and mechanically compatible with the 74HCT373N and support direct board-level replacement without design modification.

Frequently Asked Questions (FAQ)

Q: Can CD74HCT373E and SN74HCT373N be used interchangeably with 74HCT373N?

A: Both parts are functionally equivalent for applications within the overlapping operating temperature range (-40°C ~ 85°C) and meet all electrical specifications. Direct substitution is supported at the board level due to identical 20-DIP package geometry and pin configuration.

Q: What is the primary difference between the two substitute parts?

A: The CD74HCT373E supports a lower temperature minimum (-55°C vs. -40°C) and has a higher propagation delay (35ns vs. 25ns). The SN74HCT373N maintains closer alignment with the original temperature range and offers intermediate propagation delay performance.

Q: Are there any compliance or certification differences?

A: All three parts are ROHS3 compliant and REACH unaffected. Both substitutes maintain equivalent regulatory status to the original NXP part.

Q: Does package type affect substitution?

A: All parts use the 20-DIP (0.300", 7.62mm) form factor. The substitute parts are supplied in tube packaging, which is standard for active-status components and does not affect electrical or mechanical compatibility.

Q: Which substitute should be selected for new designs?

A: Selection depends on application temperature requirements. For standard industrial applications (-40°C ~ 85°C), SN74HCT373N provides adequate performance. For extended low-temperature applications, CD74HCT373E is appropriate. Both offer superior availability as active products.