SN75189D Equivalent & Substitute Parts

Part Overview

The SN75189D is a 0/4 Receiver RS232 interface IC manufactured by Texas Instruments in a 14-SOIC surface mount package. This component is classified as Last Time Buy, indicating discontinued production with limited inventory availability. The SN75189D operates within a 4.5V to 5.5V supply voltage range and supports operating temperatures from 0°C to 70°C. Due to its Last Time Buy status, identifying qualified substitute parts is essential for design continuity and long-term component sourcing.

Substiute Parts

SN75189D

Texas InstrumentsIn Stock: 2241SN75189D Datasheet

Current PartRFQ

SN75C189ADR

Texas InstrumentsIn Stock: 6543SN75C189ADR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN75189D is determined by strict equivalence in the following parameters:

• Protocol: RS232
• Type: Receiver
• Number of Drivers/Receivers: 0/4
• Package / Case: 14-SOIC (0.154", 3.90mm Width)
• Mounting Type: Surface Mount
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)

The SN75C189ADR qualifies as a direct substitute based on matching all critical functional and physical parameters. The substitute maintains identical package geometry, protocol support, and receiver configuration, ensuring pin-for-pin compatibility and functional equivalence in RS232 receiver applications.

Parameter Comparison

Engineering Selection Recommendations

The SN75C189ADR is the qualified substitute for the SN75189D. Both components are manufactured by Texas Instruments and maintain ROHS3 compliance and identical MSL ratings. The substitute part carries Active product status, ensuring continued availability and supply chain stability compared to the Last Time Buy status of the main part.

The SN75C189ADR operates within an expanded supply voltage range of 4.5V to 6V, which encompasses the 4.5V to 5.5V operating range of the SN75189D. This expanded voltage tolerance provides additional design flexibility without compromising functional compatibility. Both parts maintain identical operating temperature specifications and package geometry, confirming direct substitutability in existing designs.

Frequently Asked Questions (FAQ)

Q: Can the SN75C189ADR directly replace the SN75189D in existing designs?

A: Yes. Both parts are pin-for-pin compatible RS232 receiver ICs in 14-SOIC packages with identical electrical functionality, operating temperature range, and compliance certifications.

Q: What is the difference between the SN75189D and SN75C189ADR?

A: The primary differences are product status and supply voltage range. The SN75189D is Last Time Buy with 4.5V to 5.5V supply voltage, while the SN75C189ADR is Active with 4.5V to 6V supply voltage. The SN75C189ADR also includes specified receiver hysteresis of 970 mV.

Q: Why should I transition from SN75189D to SN75C189ADR?

A: The SN75189D is Last Time Buy, indicating discontinued production. The SN75C189ADR is an Active product from the same manufacturer, ensuring long-term availability and supply chain continuity.

Q: Are there packaging differences between these parts?

A: No. Both parts use identical 14-SOIC (0.154", 3.90mm Width) surface mount packages. The SN75189D is supplied in Tube packaging, while the SN75C189ADR is supplied in Tape & Reel format, but the physical package dimensions and pin configuration are identical.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the SN75189D and SN75C189ADR are ROHS3 compliant with MSL rating of 1 (Unlimited) and REACH Unaffected status.