SN74LS624DR Equivalent & Substitute Parts

Part Overview

The SN74LS624DR is a Voltage Controlled Oscillator (VCO) IC manufactured by Texas Instruments, operating at 20MHz with a 14-SOIC surface mount package. This component is classified as an active product and is used in clock and timing applications requiring voltage-controlled frequency generation. The need for equivalent and substitute parts arises from inventory availability, supply chain considerations, and design flexibility while maintaining identical electrical and mechanical specifications.

Substiute Parts

SN74LS624DR

Texas InstrumentsIn Stock: 1061SN74LS624DR Datasheet

Current PartRFQ

SN74LS628DR

Texas InstrumentsIn Stock: 2377SN74LS628DR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The SN74LS628DR qualifies as a parametric equivalent to the SN74LS624DR based on the following criteria:

Matching Electrical Parameters:

• Frequency: 20MHz
• Supply Voltage Range: 4.75V ~ 5.25V
• Supply Current: 20 mA
• Operating Temperature Range: 0°C ~ 70°C

Matching Mechanical Parameters:

• Package Type: 14-SOIC (0.154", 3.90mm Width)
• Mounting Type: Surface Mount
• Supplier Device Package: 14-SOIC

Matching Compliance & Status:

• Series: 74LS
• Product Status: Active
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)
• REACH Status: REACH Unaffected

The SN74LS628DR maintains identical specifications across all critical parameters, enabling direct substitution in applications requiring the SN74LS624DR.

Parameter Comparison

Engineering Selection Recommendations

Both the SN74LS624DR and SN74LS628DR are active products from Texas Instruments with identical electrical and mechanical specifications. Selection between these parts should be based on:

Availability: The SN74LS628DR currently has higher inventory availability (2334 Pcs) compared to the SN74LS624DR (1048 Pcs), making it a viable alternative for procurement planning.

Compliance: Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory requirements are met regardless of which part is selected.

Supply Chain Continuity: Both parts are active products with identical specifications, supporting long-term design stability and supply chain flexibility.

Frequently Asked Questions (FAQ)

Q: Can the SN74LS628DR be used as a direct replacement for the SN74LS624DR?

A: Yes. The SN74LS628DR is a parametric equivalent with identical electrical specifications (20MHz frequency, 4.75V ~ 5.25V supply voltage, 20 mA supply current, 0°C ~ 70°C operating temperature), mechanical specifications (14-SOIC package, surface mount), and compliance certifications (ROHS3, REACH unaffected). No circuit modifications are required.

Q: Are there any package or pinout differences between these parts?

A: No. Both parts use the identical 14-SOIC (0.154", 3.90mm Width) package with surface mount configuration. PCB layout and footprints are interchangeable.

Q: What are the key parameters that determine substitution eligibility?

A: Substitution eligibility is determined by matching frequency (20MHz), supply voltage range (4.75V ~ 5.25V), supply current (20 mA), operating temperature range (0°C ~ 70°C), package type (14-SOIC), and mounting type (surface mount). Both parts meet all these criteria.

Q: Do both parts have the same compliance certifications?

A: Yes. Both the SN74LS624DR and SN74LS628DR are ROHS3 compliant with REACH unaffected status and moisture sensitivity level 1 (unlimited).

Q: Which part should be selected for new designs?

A: Selection should be based on current inventory availability and supply chain lead times. Both parts are active products with identical specifications, making either suitable for new designs.