Part A
AM26C31ID
Texas Instruments
- Lifecycle
- Active
- Stock
- 7351 PCS
- Package
- SOIC-16
- Series
- Interfaces - pilotes, récepteurs, émetteurs - récepteurs
Replacement verdict
Compatible functional replacement candidate
The AM26C31ID and AM26C31CDRE4 are functionally equivalent quad differential line drivers sharing the same RS-422/RS-485 interface architecture, logic family, and electrical characteristics. The AM26C31CDRE4 is a tape-and-reel packaged variant of the same device family, making it a viable functional replacement candidate for the AM26C31ID, provided package and ordering-format requirements are validated against the target design.
Function and Interface Type
High match
Package Type
Validation required
Supply Voltage Range
High match
Operating Temperature Range
Validation required
Parts at a glance
Part B
AM26C31CDRE4
Texas Instruments
- Lifecycle
- Active
- Stock
- 7084 PCS
- Package
- SOIC-16
- Series
- Interfaces - pilotes, récepteurs, émetteurs - récepteurs
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AM26C31ID | AM26C31CDRE4 | Why it matters |
|---|---|---|---|
| Function | Quadruple differential line driver | Quadruple differential line driver | Both devices perform the same core function, so they are functionally interchangeable in most designs. |
| Number of Drivers | 4 | 4 | The driver count must match the number of differential lines the system needs to transmit. |
| Supply Voltage Range | 4.5 V to 5.5 V | 4.5 V to 5.5 V | The supply range determines compatibility with the system power rail and signaling levels. |
| Output Type | Differential (3-state) | Differential (3-state) | Three-state differential outputs allow bus sharing and are essential for multipoint RS-422/RS-485 style networks. |
| Data Rate | Up to 10 Mbps | Up to 10 Mbps | The maximum data rate must meet the throughput requirements of the communication link. |
| Operating Temperature Range | -40 °C to 85 °C | -40 °C to 85 °C | The temperature range must cover the application's environmental conditions for reliable operation. |
| Package / Mounting | 16-SOIC (tube) | 16-SOIC (tape and reel) | Packaging form affects assembly handling and board footprint; both share the same SOIC body but differ in shipping format. |
| Product Status / Lifecycle | Active | Active (reel variant) | Lifecycle status affects long-term availability and sourcing strategy for production builds. |
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 | AM26C31ID | AM26C31CDRE4 |
|---|---|---|
| Supplier | - | Texas Instruments |
| Part Status | Active | Discontinued at Digi-Key |
| Type | Driver | Driver |
| Number of Drivers/Receivers | 4/0 | 4/0 |
| Voltage - Supply | 4.5V ~ 5.5V | 4.5V ~ 5.5V |
| Operating Temperature | -40°C ~ 85°C | 0°C ~ 70°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the AM26C31ID and AM26C31CDRE4?
Both are quadruple differential line drivers from Texas Instruments that meet the requirements of TIA/EIA-422-B and ITU Recommendation V.11. They are designed for balanced transmission of digital data over twisted-pair or parallel-wire cables and are functionally equivalent members of the AM26C31 family.
What is the difference between the AM26C31ID and AM26C31CDRE4?
The AM26C31ID is supplied in a 16-pin SOIC tube (rail) package with an operating temperature range of -40°C to +85°C. The AM26C31CDRE4 is supplied in a 16-pin SOIC package on tape and reel (the "R" suffix denotes reel packaging and the "E4" suffix denotes Pb-free/RoHS-compliant construction) with an operating temperature range of 0°C to +70°C. The core driver function and electrical specifications are the same; the differences are temperature grade and packaging format.
Are the AM26C31ID and AM26C31CDRE4 pin-compatible?
Yes. Both devices use the same 16-pin SOIC (D) package with identical pin assignments, so they are pin-compatible when the temperature grade and packaging format are acceptable for the application.
Can the AM26C31ID and AM26C31CDRE4 be used interchangeably in a design?
They can be used interchangeably only after confirming that the temperature grade and packaging format meet the design requirements. The AM26C31ID supports -40°C to +85°C, while the AM26C31CDRE4 supports 0°C to +70°C. The CDRE4 is reel-packaged and Pb-free/RoHS-compliant, whereas the ID is tube-packaged. Electrical driver characteristics are otherwise the same.
What are the key electrical specifications of these drivers?
Both devices are quadruple differential line drivers that meet TIA/EIA-422-B and ITU V.11 requirements, operate from a single 5 V supply, and provide typical output skew and propagation delay suitable for balanced data transmission. They feature three-state outputs and are designed for high-speed differential signaling over twisted-pair cable.
Which temperature grade should be selected for an industrial application?
For industrial environments requiring operation below 0°C or above +70°C, the AM26C31ID should be selected because it is rated for -40°C to +85°C. The AM26C31CDRE4 is rated for 0°C to +70°C and is intended for commercial-temperature applications.
Does the AM26C31CDRE4 meet RoHS requirements?
Yes. The "E4" suffix in AM26C31CDRE4 indicates Pb-free/RoHS-compliant construction per Texas Instruments ordering conventions. The AM26C31ID is a standard tube-packaged device; its RoHS status should be confirmed against the specific manufacturer datasheet or ordering information for the exact lot.
What packaging format does each part use?
The AM26C31ID is supplied in tubes (rails) in a 16-pin SOIC package. The AM26C31CDRE4 is supplied on tape and reel in a 16-pin SOIC package, which is suitable for automated pick-and-place assembly lines.