SN75189DR Equivalent & Substitute Parts

Part Overview

The SN75189DR 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 limited availability from the original manufacturer. The SN75189DR 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 components is essential for design continuity and long-term supply chain planning.

Substiute Parts

SN75189DR

Texas InstrumentsIn Stock: 3186SN75189DR Datasheet

Current PartRFQ

SN75C189ADR

Texas InstrumentsIn Stock: 6543SN75C189ADR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN75189DR is determined by the following critical parameters:

• Protocol Compatibility: Both parts must support RS232 interface standard
• Functional Configuration: Both parts must provide 0/4 Receiver configuration (0 drivers, 4 receivers)
• Package Compatibility: Both parts must use 14-SOIC surface mount package with identical physical dimensions (0.154", 3.90mm Width)
• Supply Voltage Range: The substitute must operate within or encompass the original supply voltage specification
• Operating Temperature Range: The substitute must support the specified temperature range
• Regulatory Compliance: Both parts must maintain ROHS3 compliance and equivalent environmental certifications

The SN75C189ADR meets all substitution criteria as a manufacturer-recommended alternative from Texas Instruments with identical functional specifications and package form factor.

Parameter Comparison

Engineering Selection Recommendations

The SN75C189ADR is the manufacturer-recommended substitute for the SN75189DR. Both components are manufactured by Texas Instruments and maintain identical functional specifications, package form factors, and regulatory compliance certifications. The SN75C189ADR offers the advantage of Active product status, ensuring continued availability and supply chain stability compared to the Last Time Buy status of the SN75189DR.

The extended supply voltage range of the SN75C189ADR (4.5V ~ 6V versus 4.5V ~ 5.5V) provides additional operational margin without compromising compatibility with designs specified for the original part. Both components maintain ROHS3 compliance and MSL Level 1 moisture sensitivity ratings, ensuring equivalent handling and storage requirements.

Frequently Asked Questions (FAQ)

Q: Can the SN75C189ADR be used as a direct replacement for the SN75189DR?

A: Yes. The SN75C189ADR is the manufacturer-recommended substitute with identical functional configuration (0/4 Receiver), protocol support (RS232), package type (14-SOIC), and operating specifications. Direct pin-for-pin substitution is supported.

Q: What is the difference between the SN75189DR and SN75C189ADR?

A: The primary differences are product status and supply voltage range. The SN75189DR is Last Time Buy with a 4.5V ~ 5.5V supply range, while the SN75C189ADR is Active with a 4.5V ~ 6V supply range. The SN75C189ADR includes a specified receiver hysteresis of 970 mV. All other electrical and mechanical parameters are identical.

Q: Are there any package or pinout differences?

A: No. Both components use the identical 14-SOIC package with 0.154" width (3.90mm). Pinout and physical dimensions are identical, supporting direct PCB-level substitution without layout modifications.

Q: What is the significance of the Last Time Buy status?

A: Last Time Buy indicates that the SN75189DR will no longer be manufactured after a specified date. Existing inventory will be depleted, and no future production is planned. The SN75C189ADR, with Active status, ensures long-term availability for new designs and ongoing production requirements.

Q: Do both parts meet the same regulatory and compliance standards?

A: Yes. Both the SN75189DR and SN75C189ADR are ROHS3 compliant, REACH unaffected, and carry identical MSL Level 1 ratings. Environmental and regulatory compliance is equivalent.