SN54LS14J Equivalent & Substitute Parts

Part Overview

The SN54LS14J is an active Inverter IC featuring 6 channels of Schmitt Trigger logic in a 14-CDIP through-hole package. This component is manufactured by Texas Instruments and designed for digital logic applications requiring noise immunity through Schmitt Trigger input characteristics. The part is ROHS3 compliant and currently in active production status with substantial inventory availability (7837 pcs in stock). Substitute parts are identified when equivalent functional performance can be maintained within the specified electrical and mechanical parameters of this product category.

Substiute Parts

SN54LS14J

Texas InstrumentsIn Stock: 7890SN54LS14J Datasheet

Current PartRFQ

SN74LS14N

Texas InstrumentsIn Stock: 16169SN74LS14N Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SN54LS14J is determined by the following critical parameters:

• Logic Type: Must be Inverter with Schmitt Trigger functionality
• Number of Circuits: Must be 6 channels
• Package Type: Must be 14-pin DIP format (CDIP or PDIP variants acceptable)
• Mounting: Through-hole configuration required
• Supply Voltage Compatibility: Operating ranges must overlap or be compatible within system design constraints
• Compliance: RoHS3 compliance required

The SN74LS14N qualifies as a substitute based on matching logic type, circuit count, pin configuration, and compliance standards. Both parts utilize the same 14-pin DIP footprint and provide identical functional performance in Schmitt Trigger inverter applications.

Parameter Comparison

Engineering Selection Recommendations

Both the SN54LS14J and SN74LS14N are active production components with ROHS3 compliance and REACH unaffected status. Selection between these parts should be based on the following provided specifications:

The SN54LS14J operates across an extended temperature range (-55°C to 125°C) and supports a wider supply voltage window (4.5V to 5.5V), making it suitable for industrial and military-grade applications requiring broader environmental tolerance.

The SN74LS14N operates within a standard commercial temperature range (0°C to 70°C) with a narrower supply voltage specification (4.75V to 5.25V). This part is appropriate for standard commercial applications with controlled environmental conditions.

Both parts deliver identical propagation delay performance (22ns @ 5V, 15pF) and maintain the same 6-channel Schmitt Trigger inverter functionality. The output current specification for the SN74LS14N (8mA low) exceeds that of the SN54LS14J (4mA low), providing additional drive capability when required.

Frequently Asked Questions (FAQ)

Q: Can the SN74LS14N directly replace the SN54LS14J in all applications?

A: Direct substitution is possible when the application operates within the SN74LS14N's specified ranges: 4.75V to 5.25V supply voltage and 0°C to 70°C operating temperature. If your system requires the extended temperature range or wider voltage tolerance of the SN54LS14J, the SN74LS14N is not suitable.

Q: Are the package footprints identical between these parts?

A: Both parts use 14-pin DIP packages with 0.300" (7.62mm) spacing. The SN54LS14J uses CDIP (ceramic) packaging while the SN74LS14N uses PDIP (plastic) packaging. Both are through-hole mount and share the same pin configuration, making them mechanically interchangeable on PCBs designed for 14-DIP footprints.

Q: What is the difference in input logic level specifications?

A: The SN54LS14J specifies an input logic level low of 1V, while the SN74LS14N specifies 0.5V. Both maintain the same input logic level high of 1.9V. This difference reflects the different operating specifications of the 54LS and 74LS series but does not affect functional compatibility in standard digital logic applications.

Q: Which part should I select for new designs?

A: Selection depends on environmental requirements. For applications requiring extended temperature operation or wider supply voltage tolerance, specify the SN54LS14J. For standard commercial applications with controlled operating conditions, the SN74LS14N is appropriate and offers higher output current capability.

Q: Are both parts RoHS compliant?

A: Yes, both the SN54LS14J and SN74LS14N are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.