SN74HCT08PW AND Gate IC Equivalent & Substitute Parts

Part Overview

The SN74HCT08PW is a 4-channel 2-input AND gate logic IC manufactured by Texas Instruments in a 14-TSSOP surface mount package. This part is currently discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing production and maintenance applications. The 74HCT08 logic family provides standard AND gate functionality across multiple manufacturers, enabling direct functional replacement with compatible alternatives that meet the same electrical and mechanical specifications.

Substiute Parts

SN74HCT08PW

Texas InstrumentsIn Stock: 2088SN74HCT08PW Datasheet

Current PartRFQ

SN74HCT08PWR

Texas InstrumentsIn Stock: 3116SN74HCT08PWR Datasheet

DirectRFQ

74HCT08PW,118

Nexperia USA Inc.In Stock: 824374HCT08PW,118 Datasheet

MFR RecommendedRFQ

74HCT08T14-13

Diodes IncorporatedIn Stock: 368674HCT08T14-13 Datasheet

MFR RecommendedRFQ

MC74HCT08ADTR2G

onsemiIn Stock: 3243MC74HCT08ADTR2G Datasheet

MFR RecommendedRFQ

MM74HCT08MTCX

Fairchild SemiconductorIn Stock: 4840MM74HCT08MTCX Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN74HCT08PW is determined by strict adherence to the following criteria:

Core Compatibility Requirements:

• Logic type: AND Gate with 4 circuits and 2 inputs per circuit
• Package: 14-TSSOP surface mount form factor
• Supply voltage range: Minimum 4.5V ~ 5.5V compatibility
• Output current capability: 4mA minimum for both high and low states
• Input logic levels: Low 0.8V, High 2V
• RoHS3 compliance and MSL Level 1 rating

Acceptable Variations:

• Quiescent current: Up to 20 µA maximum
• Propagation delay: Up to 24ns at specified conditions
• Operating temperature: Extended ranges acceptable if minimum -40°C and maximum ≥85°C
• Packaging format: Tube, Tape & Reel, or Cut Tape acceptable
• Manufacturer: Any qualified 74HCT08 base product number variant

All substitute parts listed maintain functional and electrical equivalence within these defined parameters.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: SN74HCT08PWR

The SN74HCT08PWR from Texas Instruments is the direct active equivalent to the discontinued SN74HCT08PW. It maintains identical electrical specifications and differs only in packaging format (Tape & Reel versus Tube). This part carries the same RoHS3 compliance and MSL Level 1 rating. Selection of this part eliminates any design re-qualification requirements.

Secondary Recommendations:

The 74HCT08PW,118 (Nexperia USA Inc.) and 74HCT08T14-13 (Diodes Incorporated) are functionally equivalent with extended operating temperature ranges (-40°C ~ 125°C). Both maintain full electrical compatibility and RoHS3 compliance. These parts are suitable for applications requiring wider temperature operation or where extended product lifecycle is required.

The MC74HCT08ADTR2G (onsemi) offers the widest supply voltage range (2V ~ 6V) and lowest quiescent current (1 µA), with superior propagation delay performance (17ns). This part is recommended for power-sensitive applications or systems requiring extended voltage tolerance. Extended operating temperature range (-55°C ~ 125°C) provides additional thermal margin.

The MM74HCT08MTCX (Fairchild Semiconductor) provides enhanced output current capability (4.8mA) and is suitable for applications requiring higher drive capability while maintaining the original operating temperature range.

Compliance Verification:

All substitute parts maintain ROHS3 compliance, EAR99 export classification, and MSL Level 1 moisture sensitivity rating. No additional compliance documentation is required for substitution within the specified parameter ranges.

Frequently Asked Questions (FAQ)

Q: Can SN74HCT08PWR be used as a direct replacement for SN74HCT08PW?

A: Yes. SN74HCT08PWR is the active equivalent manufactured by Texas Instruments with identical electrical specifications. The only difference is packaging format (Tape & Reel versus Tube). No circuit redesign is required.

Q: What is the difference between the various substitute parts?

A: All substitute parts share the same 14-TSSOP package and core AND gate functionality. Differences exist in quiescent current consumption, propagation delay, operating temperature range, and supply voltage tolerance. Selection depends on application requirements for power consumption, speed, and thermal operation.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and MSL Level 1 rating, matching the original SN74HCT08PW specifications.

Q: Can MC74HCT08ADTR2G be used in a 4.5V ~ 5.5V system?

A: Yes. The MC74HCT08ADTR2G supports a supply voltage range of 2V ~ 6V, which encompasses the 4.5V ~ 5.5V requirement. The wider voltage tolerance provides additional design margin.

Q: What is the significance of the 14-TSSOP package specification?

A: The 14-TSSOP (Thin Shrink Small Outline Package) is a surface mount package with 0.173" width and 4.40mm body width. All substitute parts use this identical package, ensuring PCB footprint compatibility without layout modifications.

Q: Which substitute part offers the best propagation delay performance?

A: The MC74HCT08ADTR2G provides the fastest propagation delay at 17ns @ 5V with 50pF load. The MM74HCT08MTCX offers 18ns @ 5V. Both are faster than the original SN74HCT08PW specification of 22ns @ 5.5V.

Q: Are there any temperature range limitations when substituting parts?

A: The original SN74HCT08PW operates from -40°C ~ 85°C. Substitute parts with extended ranges (-40°C ~ 125°C) are fully compatible and provide additional thermal margin. Parts should not be used outside their specified operating temperature ranges.