AM26LS31CDBR Equivalent & Substitute Parts

Part Overview

The AM26LS31CDBR is a 4/0 Driver RS422/RS485 interface IC manufactured by Texas Instruments in a 16-SSOP surface mount package. This part is classified as Obsolete, making identification of suitable substitutes necessary for ongoing design support and procurement. The AM26LS31 series provides differential line driver functionality for serial communication protocols, with electrical and mechanical parameters that define substitution eligibility.

Substiute Parts

AM26LS31CDBR

Texas InstrumentsIn Stock: 3315AM26LS31CDBR Datasheet

Current PartRFQ

AM26LS31CDR

Texas InstrumentsIn Stock: 38219AM26LS31CDR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AM26LS31CDBR is determined by the following criteria:

Mandatory Matching Parameters:

• Base product number: AM26LS31
• Protocol support: RS422, RS485
• Driver configuration: 4/0 (4 drivers, 0 receivers)
• Supply voltage range: 4.75V ~ 5.25V
• Operating temperature range: 0°C ~ 70°C
• Mounting type: Surface Mount
• RoHS3 compliance
• MSL rating: 1 (Unlimited)

Variable Parameters (Package-Dependent):

• Package / Case designation
• Supplier device package specification

The AM26LS31CDR qualifies as a direct substitute based on identical electrical specifications and functional parameters. The primary difference is the package type: 16-SOIC (0.154", 3.90mm Width) versus the original 16-SSOP (0.209", 5.30mm Width). Both packages are surface mount configurations with equivalent pin functionality for the AM26LS31 base product.

Parameter Comparison

Engineering Selection Recommendations

The AM26LS31CDR is the qualified substitute for the AM26LS31CDBR. Selection between these parts is determined by PCB layout and footprint requirements:

AM26LS31CDBR (16-SSOP): Original specification with wider package body (5.30mm). Obsolete status limits new procurement availability.

AM26LS31CDR (16-SOIC): Active product status with equivalent electrical performance. Narrower package body (3.90mm) accommodates space-constrained layouts. Higher inventory availability supports production schedules.

Both parts maintain identical electrical specifications, supply voltage ranges, operating temperature ratings, and protocol support. RoHS3 compliance and MSL ratings are equivalent. The substitution decision depends solely on PCB footprint compatibility and design constraints.

Frequently Asked Questions (FAQ)

Q: Can AM26LS31CDR replace AM26LS31CDBR in existing designs?

A: Yes, provided the PCB footprint accommodates the 16-SOIC package. Electrical functionality and pin assignments are identical. The 16-SOIC package is narrower (3.90mm) than the 16-SSOP package (5.30mm), requiring layout verification.

Q: What is the primary reason for substitution?

A: The AM26LS31CDBR is classified as Obsolete. The AM26LS31CDR maintains Active product status with equivalent specifications and higher inventory availability.

Q: Are the supply voltage and operating temperature ranges identical?

A: Yes. Both parts operate at 4.75V ~ 5.25V supply voltage and 0°C ~ 70°C operating temperature range.

Q: Do both parts support RS422 and RS485 protocols?

A: Yes. Both the AM26LS31CDBR and AM26LS31CDR provide 4/0 driver configuration for RS422 and RS485 serial communication.

Q: What is the difference between 16-SSOP and 16-SOIC packages?

A: Both are 16-pin surface mount packages. The 16-SSOP has a body width of 5.30mm, while the 16-SOIC has a body width of 3.90mm. Pin pitch and electrical characteristics are equivalent; the difference is physical footprint size.

Q: Are RoHS and compliance certifications the same?

A: Yes. Both parts are ROHS3 Compliant with MSL rating of 1 (Unlimited), REACH Unaffected status, and identical ECCN and HTSUS classifications.