SN74ALS623ADWRG4 Equivalent & Substitute Parts

Part Overview

The SN74ALS623ADWRG4 is a non-inverting transceiver logic IC manufactured by Texas Instruments, featuring 1 element with 8 bits per element and 3-state output capability in a 20-SOIC surface mount package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The device operates within a 4.5V to 5.5V supply voltage range and is suitable for applications requiring bidirectional data transmission with controlled output impedance.

Substiute Parts

SN74ALS623ADWRG4

Texas InstrumentsIn Stock: 1045SN74ALS623ADWRG4 Datasheet

Current PartRFQ

SN74ALS245A-1DWR

Texas InstrumentsIn Stock: 791SN74ALS245A-1DWR Datasheet

Parametric EquivalentRFQ

SN74ALS245ADWR

Texas InstrumentsIn Stock: 1693SN74ALS245ADWR Datasheet

Parametric EquivalentRFQ

SN74ALS645A-1DWR

Texas InstrumentsIn Stock: 1202SN74ALS645A-1DWR Datasheet

Parametric EquivalentRFQ

SN74ALS645ADWR

Texas InstrumentsIn Stock: 1150SN74ALS645ADWR Datasheet

Parametric EquivalentRFQ

SN74ALS623ADW

Texas InstrumentsIn Stock: 818SN74ALS623ADW Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the SN74ALS623ADWRG4 is determined by strict equivalence across the following critical parameters: logic type (non-inverting transceiver), number of elements (1), bits per element (8), output type (3-state), output current specifications (15mA high, 24mA low), supply voltage range (4.5V ~ 5.5V), operating temperature range (0°C ~ 70°C), package type (20-SOIC), and compliance certifications (ROHS3, MSL 1).

The substitute parts are grouped into two categories:

Parametric Equivalents: SN74ALS245A-1DWR, SN74ALS245ADWR, SN74ALS645A-1DWR, and SN74ALS645ADWR meet all electrical and mechanical parameters of the main part. These devices are functionally interchangeable at the circuit level. Differences exist only in packaging format (Tape & Reel versus Cut Tape & Digi-Reel) and product status (Active versus Obsolete).

Direct Manufacturer Equivalent: SN74ALS623ADW shares the identical base product number (74ALS623) and all electrical specifications with the main part, differing only in packaging format (Tube versus Tape & Reel).

Parameter Comparison

Engineering Selection Recommendations

Selection among substitute parts should be based on product status and packaging requirements. The SN74ALS623ADWRG4 is classified as obsolete; all listed substitute parts are active products, ensuring long-term availability and manufacturing support.

For direct replacement with identical base product number and active status, SN74ALS623ADW is the primary choice. This part maintains the 74ALS623 base designation and differs only in packaging format (Tube instead of Tape & Reel).

For applications where packaging format flexibility is acceptable, the parametric equivalents SN74ALS245A-1DWR, SN74ALS245ADWR, SN74ALS645A-1DWR, and SN74ALS645ADWR provide full electrical and mechanical compatibility. All substitute parts maintain ROHS3 compliance and MSL 1 rating, ensuring compatibility with standard manufacturing and storage protocols.

Frequently Asked Questions (FAQ)

Q: Can SN74ALS245A-1DWR be used as a direct replacement for SN74ALS623ADWRG4?

A: Yes. Both parts share identical electrical specifications: non-inverting transceiver logic, 1 element, 8 bits per element, 3-state output, 15mA/24mA output current, 4.5V–5.5V supply voltage, 0°C–70°C operating temperature, and 20-SOIC package. The difference is in the base product number (74ALS245 versus 74ALS623) and packaging format. Electrical and functional compatibility is complete.

Q: What is the difference between Tape & Reel and Cut Tape & Digi-Reel packaging?

A: Both are surface mount packaging formats suitable for automated assembly. Tape & Reel (TR) is a continuous reel format optimized for high-volume production. Cut Tape (CT) & Digi-Reel® provides flexibility for lower-volume or mixed-component orders. The electrical and mechanical specifications of the IC itself remain identical regardless of packaging format.

Q: Why is the main part (SN74ALS623ADWRG4) listed as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. Active substitute parts ensure design continuity and future procurement availability. All listed substitutes are currently in active production by Texas Instruments.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All parts listed, including the main part and all substitutes, are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, meeting standard environmental and reliability requirements.

Q: Can I mix different substitute parts in the same design?

A: Yes. All substitute parts meet identical electrical and mechanical specifications, allowing interchangeable use within the same circuit design. Packaging format differences do not affect circuit-level performance.