SN75185DW Equivalent & Substitute Parts

Part Overview

The SN75185DW is a 3/5 Transceiver RS232 interface IC manufactured by Texas Instruments in a 20-SOIC surface mount package. This component functions as a line driver and receiver for RS232 serial communication protocols. The SN75185DW is currently in Last Time Buy status, indicating end-of-life production. Identifying equivalent substitute parts is necessary to ensure design continuity and maintain supply chain reliability for applications requiring RS232 transceiver functionality.

Substiute Parts

SN75185DW

Texas InstrumentsIn Stock: 2146SN75185DW Datasheet

Current PartRFQ

SN75185DWR

Texas InstrumentsIn Stock: 20123SN75185DWR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN75185DW is determined by strict equivalence across the following critical parameters:

• Protocol specification: RS232
• Driver/Receiver configuration: 3/5
• Receiver hysteresis: 500 mV
• Supply voltage range: 4.5V ~ 5.5V
• Operating temperature range: 0°C ~ 70°C
• Package type: 20-SOIC with identical physical dimensions (0.295", 7.50mm Width)
• Electrical compliance: ROHS3 Compliant, REACH Unaffected

The SN75185DWR qualifies as a direct substitute based on identical electrical specifications and package configuration. The primary distinction is packaging format: the SN75185DW is supplied in Tube packaging, while the SN75185DWR is supplied in Tape & Reel (TR) format. Both parts share the same base product number (SN75185) and are manufactured by Texas Instruments.

Parameter Comparison

Engineering Selection Recommendations

The SN75185DWR is a direct functional equivalent to the SN75185DW. Both parts are manufactured by Texas Instruments and maintain identical electrical and mechanical specifications. The SN75185DWR is currently in Active product status, ensuring ongoing availability and supply chain support, whereas the SN75185DW is in Last Time Buy status.

Selection between these parts should be based on packaging requirements and procurement processes. The SN75185DWR in Tape & Reel format is suitable for high-volume automated assembly operations. The SN75185DW in Tube packaging may be preferred for lower-volume applications or manual assembly processes, though availability is limited due to Last Time Buy status.

Both parts meet ROHS3 compliance and REACH requirements, making them suitable for applications subject to environmental regulations. The MSL rating of 1 (Unlimited) indicates no moisture sensitivity constraints during storage or handling.

Frequently Asked Questions (FAQ)

Q: Can the SN75185DWR directly replace the SN75185DW in existing designs?

A: Yes. The SN75185DWR is electrically and mechanically identical to the SN75185DW. Both parts feature the same 20-SOIC package dimensions, pin configuration, and electrical specifications. The only difference is the packaging format (Tape & Reel versus Tube).

Q: What is the significance of the Last Time Buy status for the SN75185DW?

A: Last Time Buy status indicates that Texas Instruments has discontinued production of the SN75185DW. Existing inventory may be available, but no new manufacturing runs are planned. The SN75185DWR, in Active status, represents the recommended path for future procurement.

Q: Are there any differences in electrical performance between the SN75185DW and SN75185DWR?

A: No. Both parts share identical electrical specifications: 3/5 driver/receiver configuration, 500 mV receiver hysteresis, 4.5V to 5.5V supply voltage range, and 0°C to 70°C operating temperature range.

Q: What packaging format should I select for my application?

A: Tape & Reel (TR) packaging is standard for automated surface mount assembly and high-volume production. Tube packaging is typically used for lower-volume applications or manual assembly processes. The SN75185DWR (Tape & Reel) is recommended for new designs due to Active product status.

Q: Do both parts meet environmental compliance requirements?

A: Yes. Both the SN75185DW and SN75185DWR are ROHS3 Compliant and REACH Unaffected, meeting current environmental regulations for electronic components.

Q: Is the 20-SOIC package footprint identical between both parts?

A: Yes. Both parts use the 20-SOIC package with identical physical dimensions of 0.295" × 7.50mm width. PCB footprints and land patterns are interchangeable.