SN74LS624NSRG4 Equivalent & Substitute Parts

Part Overview

The SN74LS624NSRG4 is a Voltage Controlled Oscillator (VCO) IC operating at 20MHz, manufactured by Texas Instruments in the 74LS series. This component is designed for clock and timing applications requiring precise frequency generation within the 4.75V to 5.25V supply voltage range. The part is discontinued at DiGi Electronics, making equivalent and substitute parts necessary for ongoing production and maintenance applications.

Substiute Parts

SN74LS624NSRG4

Texas InstrumentsIn Stock: 1244SN74LS624NSRG4 Datasheet

Current PartRFQ

SN74LS624NSR

Texas InstrumentsIn Stock: 825SN74LS624NSR Datasheet

MFR RecommendedRFQ

SN74LS628NSR

Texas InstrumentsIn Stock: 2094SN74LS628NSR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the SN74LS624NSRG4 is determined by strict equivalence across the following critical parameters:

• Frequency: 20MHz
• Voltage Supply Range: 4.75V ~ 5.25V
• Current Supply: 20 mA
• Operating Temperature Range: 0°C ~ 70°C
• Package Type: 14-SOIC (0.209", 5.30mm Width)
• Mounting Type: Surface Mount
• RoHS and REACH Compliance Status

Two substitute parts meet these criteria: the SN74LS624NSR (manufacturer recommended) and the SN74LS628NSR (parametric equivalent). Both maintain identical electrical specifications and physical packaging, ensuring direct functional replacement in applications designed for the SN74LS624NSRG4.

Parameter Comparison

Engineering Selection Recommendations

For applications currently using the SN74LS624NSRG4, the SN74LS624NSR is the primary substitute due to its active product status and manufacturer recommendation. This part maintains full electrical and mechanical compatibility while offering current availability.

The SN74LS628NSR serves as a parametric equivalent with identical electrical specifications and packaging. However, its discontinued status at DiGi Electronics may limit long-term availability compared to the SN74LS624NSR.

Both substitutes are ROHS3 compliant and REACH unaffected, meeting regulatory requirements equivalent to the original part. Selection between these options should prioritize availability and supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can the SN74LS624NSR directly replace the SN74LS624NSRG4?

A: Yes. The SN74LS624NSR is electrically and mechanically identical to the SN74LS624NSRG4, with the same 20MHz frequency, 4.75V to 5.25V supply voltage range, 14-SOIC package, and surface mount configuration. The primary difference is packaging format (Tape & Reel versus bulk) and active product status.

Q: What is the difference between the SN74LS624NSR and SN74LS628NSR?

A: Both parts are parametric equivalents with identical electrical specifications and 14-SOIC packaging. The SN74LS624NSR is the manufacturer-recommended substitute with active product status. The SN74LS628NSR is discontinued at DiGi Electronics, making it less suitable for new designs or long-term supply requirements.

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

A: No. All three parts use the 14-SOIC (0.209", 5.30mm Width) package with surface mount configuration. PCB footprints and assembly processes remain unchanged.

Q: Do the substitute parts meet the same compliance standards?

A: Yes. Both SN74LS624NSR and SN74LS628NSR are ROHS3 compliant and REACH unaffected, matching the regulatory status of the SN74LS624NSRG4.

Q: Which substitute should be selected for new production?

A: The SN74LS624NSR is recommended for new production due to its active product status and manufacturer recommendation, ensuring better long-term availability and supply chain stability.