SN74LS623N Equivalent & Substitute Parts

Part Overview

The SN74LS623N is a non-inverting transceiver logic integrated circuit manufactured by Texas Instruments. This 20-pin DIP package device functions as a single-element, 8-bit transceiver with 3-state output capability, operating within the 4.75V to 5.25V supply voltage range. The device is classified as Active product status and maintains full RoHS3 compliance. Equivalent and substitute parts are identified when identical electrical parameters and mechanical specifications are maintained across the 74LS logic series.

Substiute Parts

SN74LS623N

Texas InstrumentsIn Stock: 2998SN74LS623N Datasheet

Current PartRFQ

SN74LS245N

Texas InstrumentsIn Stock: 5252SN74LS245N Datasheet

Parametric EquivalentRFQ

SN74LS645N

Texas InstrumentsIn Stock: 15261SN74LS645N Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SN74LS623N are identified based on strict parametric equivalence within the 74LS logic family. The substitution criteria are defined by the following key parameters that must remain identical:

• Logic Type: Transceiver, Non-Inverting
• Number of Elements: 1
• Number of Bits per Element: 8
• Output Type: 3-State
• Current - Output High, Low: 15mA, 24mA
• Voltage - Supply: 4.75V ~ 5.25V
• Operating Temperature: 0°C ~ 70°C (TA)
• Package / Case: 20-DIP (0.300", 7.62mm)
• Mounting Type: Through Hole
• Series: 74LS
• Product Status: Active
• RoHS Status: ROHS3 Compliant

The identified substitute parts SN74LS245N and SN74LS645N meet all these criteria and are therefore classified as parametric equivalents suitable for direct substitution in applications requiring the SN74LS623N.

Parameter Comparison

Engineering Selection Recommendations

All three parts—SN74LS623N, SN74LS245N, and SN74LS645N—maintain Active product status from Texas Instruments and are ROHS3 compliant. Selection between these parametric equivalents is based on inventory availability and application-specific requirements within the defined electrical and mechanical specifications. The SN74LS245N offers 5200 units in stock, while the SN74LS645N provides 15245 units in stock, compared to 2900 units for the SN74LS623N. All parts are suitable for through-hole PCB assembly and operate identically within the specified voltage and temperature ranges.

Frequently Asked Questions (FAQ)

Q: Can SN74LS245N be used as a direct replacement for SN74LS623N?

A: Yes. The SN74LS245N is a parametric equivalent meeting all electrical and mechanical specifications of the SN74LS623N, including logic type, bit configuration, output type, current ratings, supply voltage, operating temperature, and 20-DIP package format.

Q: Are there any package compatibility concerns when substituting these parts?

A: No. All three parts use identical 20-DIP (0.300", 7.62mm) through-hole packaging, ensuring direct PCB compatibility without layout modifications.

Q: Do all substitute parts maintain the same compliance certifications?

A: Yes. SN74LS245N and SN74LS645N are both ROHS3 compliant and maintain Active product status, matching the compliance profile of the SN74LS623N.

Q: What is the basis for substitution between these 74LS transceiver parts?

A: Substitution is based on identical parametric specifications: single-element, 8-bit non-inverting transceiver configuration with 3-state output, 15mA/24mA output current, 4.75V–5.25V supply voltage, 0°C–70°C operating temperature, and through-hole 20-DIP packaging.

Q: Are there differences in output current capabilities between these parts?

A: No. All three parts specify identical output current ratings of 15mA (high) and 24mA (low).