SN74LS628NG4 Equivalent & Substitute Parts

Part Overview

The SN74LS628NG4 is a Voltage Controlled Oscillator (VCO) integrated circuit manufactured by Texas Instruments, operating at 20MHz with a 14-DIP package configuration. This component is classified as discontinued at DiGi Electronics, making identification of equivalent and substitute parts essential for ongoing design support and production continuity. The part operates within a 4.75V to 5.25V supply voltage range and is suitable for clock and timing applications requiring through-hole mounting.

Substiute Parts

SN74LS628NG4

Texas InstrumentsIn Stock: 846SN74LS628NG4 Datasheet

Current PartRFQ

SN74LS624N

Texas InstrumentsIn Stock: 3961SN74LS624N Datasheet

Parametric EquivalentRFQ

SN74LS628N

Texas InstrumentsIn Stock: 2411SN74LS628N Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN74LS628NG4 is determined by strict equivalence across the following parameters: frequency (20MHz), supply voltage range (4.75V ~ 5.25V), supply current (20 mA), operating temperature range (0°C ~ 70°C), package type (14-DIP), mounting method (through hole), and functional classification (VCO). All identified substitute parts maintain identical electrical specifications and mechanical compatibility. Substitutes are grouped by manufacturer recommendation status and product availability.

Parameter Comparison

Engineering Selection Recommendations

The SN74LS628NG4 is discontinued, necessitating selection from active alternatives. Both SN74LS624N and SN74LS628N are active products from Texas Instruments with identical electrical and mechanical specifications. SN74LS628N is the manufacturer-recommended substitute, maintaining the same base product number (74LS628) while offering active product status and ROHS3 compliance. SN74LS624N provides parametric equivalence as an alternative option with confirmed inventory availability. Both substitutes are suitable for direct replacement in applications requiring 20MHz VCO functionality within the specified voltage and temperature parameters.

Frequently Asked Questions (FAQ)

Q: Can SN74LS624N and SN74LS628N be used interchangeably with SN74LS628NG4?

A: Yes. Both parts maintain identical electrical specifications (20MHz frequency, 4.75V–5.25V supply voltage, 20 mA supply current, 0°C–70°C operating temperature) and mechanical compatibility (14-DIP through-hole package). Functional equivalence is confirmed across all provided parameters.

Q: What is the difference between SN74LS624N and SN74LS628N?

A: Both parts are parametrically equivalent VCO circuits with identical electrical and mechanical specifications. SN74LS628N is the manufacturer-recommended substitute, sharing the same base product number as the original part. Selection between them depends on inventory availability and procurement requirements.

Q: Are there packaging differences between these substitutes?

A: All three parts use identical 14-DIP (0.300", 7.62mm) through-hole packaging. No PCB layout or mounting modifications are required when substituting between these parts.

Q: Do these substitutes maintain RoHS compliance?

A: Yes. SN74LS628N and SN74LS624N are both ROHS3 compliant, matching the compliance status of the original SN74LS628NG4.

Q: What inventory status should I consider when selecting a substitute?

A: SN74LS628N (2,302 units) and SN74LS624N (3,884 units) are both active products with confirmed stock availability, providing reliable sourcing options for production requirements.