Part A
AM26LS31CD
Texas Instruments
- Lifecycle
- Active
- Stock
- 2633 PCS
- Package
- SOIC-16
- Series
- Interface - Condutores, Receptores, Transceivers
Replacement verdict
Compatible functional replacement candidate
The AM26LS31CD and AM26LS31CDRE4 are functionally equivalent quad differential line drivers sharing the same device core, logic function, and electrical characteristics; the AM26LS31CDRE4 is simply the tape-and-reel packaging variant of the same part, making it a suitable functional replacement candidate where reel packaging is acceptable.
Function and Logic Family
High match
Package Type
High match
Electrical Characteristics
High match
Packaging and Ordering Format
Validation required
Parts at a glance
Part B
AM26LS31CDRE4
Texas Instruments
- Lifecycle
- Active
- Stock
- 2303 PCS
- Package
- SOIC-16
- Series
- Interface - Condutores, Receptores, Transceivers
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AM26LS31CD | AM26LS31CDRE4 | Why it matters |
|---|---|---|---|
| Function | Quadruple differential line driver | Quadruple differential line driver | Both parts perform the same core function, so they are functionally interchangeable in a circuit. |
| Number of Drivers | 4 | 4 | The driver count must match the number of differential lines the design needs to drive. |
| Supply Voltage Range | 4.75 V to 5.25 V | 4.75 V to 5.25 V | The operating supply window determines compatibility with the system power rail. |
| Output Type | Differential (tri-state) | Differential (tri-state) | Tri-state differential outputs allow bus sharing and match RS-422/RS-485 signaling requirements. |
| Data Rate | Up to 10 Mbps | Up to 10 Mbps | Maximum data rate must meet the signaling speed required by the application. |
| Operating Temperature Range | 0°C to 70°C | 0°C to 70°C | The temperature range must cover the ambient conditions of the target environment. |
| Package / Mounting | SOIC-16, surface mount | SOIC-16, surface mount | Package and mounting style must match the PCB footprint and assembly process. |
| Packaging / Ordering Format | Tube | Tape and reel | The ordering format affects handling and assembly; tape and reel suits automated pick-and-place lines while tubes suit manual or low-volume assembly. |
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AM26LS31CD | AM26LS31CDRE4 |
|---|---|---|
| Supplier | - | Texas Instruments |
| Part Status | Active | Discontinued at Digi-Key |
| Type | Driver | Driver |
| Protocol | RS422, RS485 | RS422, RS485 |
| Number of Drivers/Receivers | 4/0 | 4/0 |
| Voltage - Supply | 4.75V ~ 5.25V | 4.75V ~ 5.25V |
| Operating Temperature | 0°C ~ 70°C | 0°C ~ 70°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What is the difference between AM26LS31CD and AM26LS31CDRE4?
Both are Texas Instruments AM26LS31 quad differential line drivers in a 16-pin SOIC (D) package. The AM26LS31CD is supplied in tube packaging, while the AM26LS31CDRE4 is the same device supplied in tape-and-reel packaging (R suffix) and is RoHS-compliant (E4 suffix). The electrical and functional specifications are identical.
Are AM26LS31CD and AM26LS31CDRE4 electrically and functionally interchangeable?
Yes. Both orderable part numbers share the same datasheet, die, pinout, and electrical specifications. The only differences are packaging format (tube vs. tape-and-reel) and the RoHS compliance designation on the RE4 variant.
What are the key electrical specifications of the AM26LS31CD/AM26LS31CDRE4?
Per the Texas Instruments datasheet, the AM26LS31 is a quad differential line driver designed for digital data transmission over balanced lines. It operates from a single 5 V supply, meets EIA/TIA-422-B and ITU Recommendation V.11 requirements, features 3-state outputs, and provides high output impedance in the power-off condition. It is characterized for operation from 0°C to 70°C (C suffix).
What package and pin count do AM26LS31CD and AM26LS31CDRE4 use?
Both parts are offered in the 16-pin SOIC package, designated by the "D" suffix in the orderable part number. The pinout is identical between the two variants.
Why would a designer choose AM26LS31CDRE4 over AM26LS31CD?
The RE4 variant is supplied in tape-and-reel, which is preferred for automated high-volume SMT assembly lines. It also carries the RoHS-compliant E4 designation, which may be required for products subject to RoHS directives. The CD tube version is typically used for prototyping or low-volume hand assembly.
Do AM26LS31CD and AM26LS31CDRE4 meet the same industry standards?
Yes. Both variants are the same silicon device and meet EIA/TIA-422-B and ITU Recommendation V.11 balanced line transmission standards as specified in the Texas Instruments datasheet. Compliance is a property of the device, not the packaging variant.
What is the operating temperature range for AM26LS31CD and AM26LS31CDRE4?
Both the C-suffix AM26LS31CD and AM26LS31CDRE4 are characterized for operation from 0°C to 70°C, per the Texas Instruments datasheet. For wider temperature ranges, other suffixes (such as I or Q) should be selected.
Can AM26LS31CD and AM26LS31CDRE4 be used as drop-in replacements for each other on an existing PCB?
Yes, from a footprint and electrical standpoint, since both use the identical 16-pin SOIC (D) package and pinout. The only practical consideration is the packaging format: tape-and-reel (RE4) versus tube (CD), which affects assembly handling rather than board-level compatibility.