AM26C31CDB Equivalent & Substitute Parts

Part Overview

The AM26C31CDB is a 4/0 Driver RS422 interface IC manufactured by Texas Instruments in a 16-SSOP surface mount package. This component functions as a line driver for RS422 serial communication protocols. The AM26C31CDB carries a Last Time Buy product status, indicating that Texas Instruments has discontinued this part number and will no longer manufacture it after existing inventory is depleted. Identifying equivalent and substitute parts is necessary to ensure continued availability for new designs and ongoing production requirements.

Substiute Parts

AM26C31CDB

Texas InstrumentsIn Stock: 989AM26C31CDB Datasheet

Current PartRFQ

AM26C31IDBR

Texas InstrumentsIn Stock: 2382AM26C31IDBR Datasheet

MFR RecommendedRFQ

DS26C31TM/NOPB

Texas InstrumentsIn Stock: 1540DS26C31TM/NOPB Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AM26C31CDB is determined by the following critical parameters:

Electrical Compatibility Requirements:

• Voltage supply range: 4.5V ~ 5.5V
• Driver/Receiver configuration: 4/0 (4 drivers, 0 receivers)
• Interface protocol: RS422 or compatible

Mechanical Compatibility Requirements:

• Mounting type: Surface Mount
• Package type: 16-pin configuration (SSOP or SOIC variants acceptable)

Compliance Requirements:

• RoHS3 compliance
• Moisture Sensitivity Level 1

Substitute parts must satisfy all electrical parameters and maintain surface mount compatibility. Package variants (SSOP to SOIC) are permissible provided pin count and electrical characteristics remain equivalent.

Parameter Comparison

Engineering Selection Recommendations

AM26C31IDBR (Manufacturer Recommended Substitute)

The AM26C31IDBR is the primary recommended substitute for the AM26C31CDB. Both parts share identical electrical specifications (4.5V ~ 5.5V supply, 4/0 driver configuration) and package format (16-SSOP). The AM26C31IDBR maintains Active product status with Texas Instruments, ensuring long-term availability. The extended operating temperature range (-40°C ~ 85°C) provides broader environmental capability compared to the original part. Both parts are ROHS3 compliant with MSL 1 rating. This substitute requires no design modifications and provides direct pin-compatible replacement.

DS26C31TM/NOPB (Alternative Substitute)

The DS26C31TM/NOPB is an alternative substitute offering expanded protocol support (RS422 and RS485). Electrical specifications remain compatible (4.5V ~ 5.5V supply, 4/0 driver configuration). The primary difference is the package format: 16-SOIC (0.154", 3.90mm Width) versus 16-SSOP (0.209", 5.30mm Width). This package change requires PCB layout modification but maintains electrical compatibility. The DS26C31TM/NOPB carries Active product status and ROHS3 compliance. Selection of this substitute is appropriate when PCB redesign is feasible and dual-protocol capability (RS422/RS485) is beneficial.

Frequently Asked Questions (FAQ)

Q: Can AM26C31IDBR directly replace AM26C31CDB without PCB modifications?

A: Yes. The AM26C31IDBR is pin-compatible with the AM26C31CDB. Both use the 16-SSOP package with identical pinout. No PCB layout changes are required for this substitution.

Q: What is the difference between AM26C31CDB and AM26C31IDBR?

A: The primary differences are product status and operating temperature range. The AM26C31CDB is Last Time Buy (discontinued), while AM26C31IDBR is Active. The AM26C31IDBR operates across -40°C ~ 85°C versus the AM26C31CDB's 0°C ~ 70°C range. Electrical specifications and package format are identical.

Q: Can DS26C31TM/NOPB be used as a substitute?

A: DS26C31TM/NOPB is electrically compatible but uses a different package (16-SOIC instead of 16-SSOP). PCB redesign is required. This substitute is suitable when layout modification is acceptable and the expanded RS422/RS485 protocol support is advantageous.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. Both AM26C31IDBR and DS26C31TM/NOPB are ROHS3 compliant with MSL 1 rating, matching the original AM26C31CDB specifications.

Q: What is the inventory status of substitute parts?

A: AM26C31IDBR has 2320 pieces in stock. DS26C31TM/NOPB has 1525 pieces in stock. Both are available as new original components.

Q: Does the operating temperature range affect substitution suitability?

A: The extended temperature range of substitute parts (-40°C ~ 85°C) is a superset of the original part's range (0°C ~ 70°C). This provides enhanced capability and does not restrict substitution in applications requiring the original temperature range.