SN75LBC172ADWR Equivalent & Substitute Parts

Part Overview

The SN75LBC172ADWR is a 4/0 Driver RS422/RS485 interface IC manufactured by Texas Instruments in a 20-SOIC surface mount package. This component is classified as Last Time Buy, indicating discontinued production with limited availability. The part operates at 30Mbps data rate with a supply voltage range of 4.75V to 5.25V and temperature range of 0°C to 70°C. Due to its Last Time Buy status and limited inventory, identifying equivalent substitute parts is essential for design continuity and long-term supply chain planning.

Substiute Parts

SN75LBC172ADWR

Texas InstrumentsIn Stock: 1760SN75LBC172ADWR Datasheet

Current PartRFQ

SN65LBC172ADWR

Texas InstrumentsIn Stock: 3458SN65LBC172ADWR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN75LBC172ADWR is determined by strict equivalence across the following critical parameters:

Protocol compatibility: Both main and substitute parts must support RS422 and RS485 protocols.

Driver/Receiver configuration: The 4/0 driver/receiver count must be maintained.

Data rate: 30Mbps operational capability is required.

Supply voltage: 4.75V to 5.25V range must be supported.

Package and pinout: 20-SOIC surface mount package with identical pin configuration.

Electrical characteristics: Matching electrical performance within specified operating conditions.

The SN65LBC172ADWR meets all substitution criteria as a direct equivalent from the same manufacturer with identical functional specifications and package configuration.

Parameter Comparison

Engineering Selection Recommendations

The SN65LBC172ADWR is a direct functional equivalent to the SN75LBC172ADWR. Both parts share identical electrical specifications, protocol support, data rate capability, supply voltage requirements, and package configuration. The primary distinction is product status: the SN75LBC172ADWR is Last Time Buy with limited inventory (1748 pcs), while the SN65LBC172ADWR maintains Active status with greater availability (3348 pcs).

The SN65LBC172ADWR offers an extended operating temperature range of -40°C to 85°C compared to the SN75LBC172ADWR's 0°C to 70°C range, providing broader environmental compatibility. Both parts maintain ROHS3 compliance and identical moisture sensitivity ratings.

For new designs or long-term production requirements, the SN65LBC172ADWR is the appropriate selection due to its Active product status and superior temperature range. For existing designs currently using the SN75LBC172ADWR, the SN65LBC172ADWR provides seamless substitution with identical pinout and electrical performance.

Frequently Asked Questions (FAQ)

Q: Can the SN65LBC172ADWR directly replace the SN75LBC172ADWR in existing designs?

A: Yes. Both parts are pin-compatible 20-SOIC packages with identical electrical specifications, protocol support, and data rate capability. No circuit modifications are required for substitution.

Q: What is the primary difference between these two parts?

A: The SN65LBC172ADWR has an extended operating temperature range (-40°C to 85°C) compared to the SN75LBC172ADWR (0°C to 70°C). The SN65LBC172ADWR also maintains Active product status with greater availability.

Q: Are there any compliance or certification differences?

A: No. Both parts are ROHS3 compliant, REACH unaffected, and carry identical moisture sensitivity ratings (MSL 1 - Unlimited).

Q: What supply voltage do these parts require?

A: Both the SN75LBC172ADWR and SN65LBC172ADWR operate with a supply voltage range of 4.75V to 5.25V.

Q: What protocols do these RS422/RS485 drivers support?

A: Both parts support RS422 and RS485 protocols with a 4/0 driver/receiver configuration and 30Mbps data rate capability.

Q: Is the package configuration identical between these parts?

A: Yes. Both parts use a 20-SOIC surface mount package with 0.295" width (7.50mm) and identical pinout.