SN74ALS667DWR Equivalent & Substitute Parts

Part Overview

The SN74ALS667DWR is a D-Type Transparent Latch logic IC manufactured by Texas Instruments, featuring a single 8:8 channel configuration with tri-state output capability. This component is classified as obsolete, which necessitates identification of functionally equivalent alternatives for ongoing design support and procurement continuity. The part operates within the 4.5V to 5.5V supply voltage range and is packaged in a 24-SOIC surface mount configuration.

Substiute Parts

SN74ALS667DWR

Texas InstrumentsIn Stock: 821SN74ALS667DWR Datasheet

Current PartRFQ

SN74ALS667DW

Texas InstrumentsIn Stock: 1218SN74ALS667DW Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SN74ALS667DWR is determined by strict equivalence across the following critical parameters:

• Logic Type: D-Type Transparent Latch
• Circuit Configuration: 8:8 channel
• Output Type: Tri-State
• Voltage - Supply: 4.5V ~ 5.5V
• Independent Circuits: 1
• Delay Time - Propagation: 9ns
• Current - Output High, Low: 400µA, 8mA
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 24-SOIC (0.295", 7.50mm Width)
• Mounting Type: Surface Mount

The SN74ALS667DW meets all specified electrical and mechanical parameters and qualifies as a direct substitute.

Parameter Comparison

Engineering Selection Recommendations

The SN74ALS667DW is the qualified substitute for the obsolete SN74ALS667DWR. Both components maintain identical electrical specifications, timing characteristics, and mechanical packaging. The primary distinction is product status: the SN74ALS667DW is currently in active production, ensuring procurement availability and supply chain continuity.

Both parts satisfy ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements for electronic component manufacturing and distribution. The transition from SN74ALS667DWR to SN74ALS667DW requires no circuit redesign or board layout modification, as pin configuration and functional behavior remain unchanged.

Frequently Asked Questions (FAQ)

Q: Can the SN74ALS667DW directly replace the SN74ALS667DWR without circuit modification?

A: Yes. The SN74ALS667DW is electrically and mechanically equivalent to the SN74ALS667DWR across all specified parameters. No circuit redesign is required.

Q: What is the primary reason for substitution?

A: The SN74ALS667DWR is classified as obsolete. The SN74ALS667DW is the active production equivalent, ensuring long-term availability and supply chain reliability.

Q: Are there packaging differences between these parts?

A: No. Both components use identical 24-SOIC surface mount packaging with 0.295" width (7.50mm). PCB footprints are interchangeable.

Q: Do compliance certifications differ between the main part and substitute?

A: No. Both parts are ROHS3 compliant and REACH unaffected, meeting identical regulatory standards.

Q: What are the critical parameters that define substitution eligibility?

A: Logic type (D-Type Transparent Latch), circuit configuration (8:8), output type (tri-state), supply voltage (4.5V ~ 5.5V), propagation delay (9ns), output current specifications (400µA, 8mA), operating temperature range (0°C ~ 70°C), and package type (24-SOIC) must remain constant for substitution validity.