SN54LS08J Equivalent & Substitute Parts

Part Overview

The SN54LS08J is a 4-channel AND gate logic IC manufactured by Texas Instruments, housed in a 14-pin CDIP package. This component is an active product with full inventory availability (31,130 pcs in stock). The SN54LS08J operates across military-grade temperature ranges (-55°C to 125°C) and is designed for applications requiring reliable AND logic operations in harsh environments. Substitute parts are identified when equivalent functional performance, electrical characteristics, and package compatibility are maintained while accommodating different operating temperature ranges or packaging formats.

Substiute Parts

SN54LS08J

Texas InstrumentsIn Stock: 31197SN54LS08J Datasheet

Current PartRFQ

SN74LS08N

Texas InstrumentsIn Stock: 14416SN74LS08N Datasheet

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Key Parameters

Substitute Part Grouping Explanation

The SN74LS08N qualifies as a functional substitute based on the following criteria:

Matching Parameters:

• Logic Type: AND Gate (identical function)
• Number of Circuits: 4 channels
• Number of Inputs: 2 inputs per channel
• Max Propagation Delay: 20ns @ 5V, 15pF (identical timing)
• Package Footprint: 14-pin DIP format (0.300", 7.62mm pitch - mechanically compatible)
• Mounting Type: Through Hole
• RoHS Status: ROHS3 Compliant
• Manufacturer: Texas Instruments (same source)

Allowable Variations:

• Operating Temperature: SN74LS08N operates 0°C ~ 70°C (commercial grade vs. military grade of SN54LS08J)
• Voltage - Supply: SN74LS08N operates 4.75V ~ 5.25V (narrower range than SN54LS08J's 4.5V ~ 5.5V)
• Current - Output Low: SN74LS08N rated 8mA vs. SN54LS08J at 4mA (higher capability acceptable)
• Input Logic Level - Low: SN74LS08N at 0.8V vs. SN54LS08J at 0.7V (within standard TTL logic margins)

Parameter Comparison

Engineering Selection Recommendations

SN54LS08J is the appropriate choice for applications requiring:

• Extended temperature operation from -55°C to 125°C (military and aerospace environments)
• Wider supply voltage tolerance (4.5V ~ 5.5V)
• Military-grade reliability specifications

SN74LS08N is suitable for applications where:

• Operating temperature range is limited to 0°C ~ 70°C (commercial/industrial environments)
• Supply voltage stability is maintained within 4.75V ~ 5.25V
• Cost optimization is a secondary consideration
• Higher output current capability (8mA low) provides additional margin

Both parts maintain identical logic function, propagation delay, and physical footprint compatibility. Selection depends on environmental operating conditions and supply voltage stability of the target application. Both parts are ROHS3 compliant and REACH unaffected, meeting modern regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can SN74LS08N replace SN54LS08J in all applications?

A: Functional replacement is possible only in applications where the operating temperature remains within 0°C ~ 70°C and supply voltage is stable within 4.75V ~ 5.25V. Applications requiring -55°C ~ 125°C operation must use SN54LS08J.

Q: Are the packages physically interchangeable?

A: Yes. Both parts use 14-pin DIP format with 0.300" (7.62mm) pitch. The SN54LS08J uses CDIP (ceramic) packaging while SN74LS08N uses PDIP (plastic) packaging, but both fit standard 14-pin DIP sockets and PCB layouts.

Q: What is the difference between CDIP and PDIP packaging?

A: CDIP (Ceramic DIP) is used for the SN54LS08J and provides superior thermal and environmental performance for military applications. PDIP (Plastic DIP) is used for the SN74LS08N and is standard for commercial-grade components. Both are through-hole mounted.

Q: Are there differences in logic performance between these parts?

A: No. Both parts provide identical AND gate logic function with 4 channels, 2 inputs per channel, and 20ns maximum propagation delay at 5V with 15pF load.

Q: What does the temperature range difference mean for my design?

A: SN54LS08J maintains specifications across -55°C to 125°C, suitable for aerospace, military, and extreme industrial environments. SN74LS08N is rated 0°C to 70°C, appropriate for standard commercial and industrial applications within normal environmental conditions.

Q: Are both parts RoHS compliant?

A: Yes. Both SN54LS08J and SN74LS08N are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards.