Part A
AM26C31ID
Texas Dụng cụ
- Lifecycle
- Active
- Stock
- 7351 PCS
- Package
- SOIC-16
- Series
- Interface - Drivers, Receivers, Transceivers
Replacement verdict
Compatible functional replacement candidate
The AM26C31ID and AM26C31CDE4 are functionally equivalent quad differential line drivers from the same AM26C31 family, sharing identical logic function, signaling standard, channel count, and supply voltage range. The primary distinction lies in package format and operating temperature grade, so the AM26C31CDE4 can serve as a functional substitute for the AM26C31ID provided the board layout accommodates the SOIC-16 package and the target application's thermal environment is validated against the commercial temperature range.
Logic Function and Output Type
High match
Channel Count
High match
Package Type
Validation required
Operating Temperature Range
Validation required
Parts at a glance
Part B
AM26C31CDE4
Texas Dụng cụ
- Lifecycle
- Active
- Stock
- 6869 PCS
- Package
- SOIC-16
- Series
- Interface - Drivers, Receivers, 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 | AM26C31ID | AM26C31CDE4 | 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 RS-422/RS-485 driver applications. |
| Number of Drivers | 4 | 4 | The driver count determines how many differential lines can be driven per package, affecting channel capacity in a design. |
| Supply Voltage (Typical) | 5 V | 5 V | Matching supply voltage ensures the part can drop into the same power rail without redesign. |
| Output Type | Differential (3-state) | Differential (3-state) | Three-state differential outputs allow bus sharing and are essential for multipoint bus architectures. |
| Package / Mounting | 16-SOIC (surface mount) | 16-SOIC (surface mount) | Identical package and mounting style allow the same PCB footprint to be used for either part. |
| Operating Temperature Range | -40°C to +85°C | 0°C to +70°C | The wider industrial temperature range of the ID version makes it suitable for harsher environments, while the CDE4 is limited to commercial temperatures. |
| Product Grade / Series | Industrial grade (I suffix) | Commercial grade (C suffix) | Grade designation reflects tested temperature and reliability screening, which affects suitability for industrial versus commercial applications. |
| Data Rate Capability | Up to 10 Mbps | Up to 10 Mbps | Equivalent data rate capability ensures both parts meet the same signaling speed requirements in a bus design. |
| RoHS Compliance | RoHS compliant | RoHS compliant | Both parts meet environmental regulations, so compliance is not a differentiator for substitution. |
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 | AM26C31CDE4 |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC,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 AM26C31CDE4?
Both are quadruple differential line drivers from Texas Instruments that meet the TIA/EIA-422-B and ITU-T V.11 standards. They are functionally identical RS-422 line driver ICs; the differences lie in package, temperature grade, and ordering suffix.
What is the difference between the AM26C31ID and AM26C31CDE4?
The AM26C31ID is supplied in an SOIC-16 (D) package and is specified over the industrial temperature range of -40°C to +85°C. The AM26C31CDE4 is supplied in the same SOIC-16 (D) package but is specified over the commercial temperature range of 0°C to +70°C, with the "E4" suffix denoting Pb-free (RoHS-compliant) green molding compound. Both share the same electrical function and pinout.
Are the AM26C31ID and AM26C31CDE4 pin-compatible?
Yes. Both devices use the standard 16-pin SOIC (D) package with identical pin assignments: four driver inputs (1A–4A), four driver outputs (1Y–4Y), two enable inputs (1,2EN and 3,4EN), VCC on pin 16, and GND on pin 8. They can be used interchangeably on the same PCB footprint.
What are the key electrical specifications shared by both devices?
Both operate from a single 5 V supply (4.5 V to 5.5 V range), provide differential outputs meeting RS-422 levels, support data rates up to 10 Mbps, and feature a typical propagation delay of approximately 7 ns. Each device offers four independent drivers with three-state outputs and short-circuit protection.
Can the AM26C31CDE4 be used as a drop-in replacement for the AM26C31ID?
Electrically and mechanically yes, but the temperature rating must be considered. The AM26C31CDE4 is rated only for 0°C to +70°C, so it should not replace the AM26C31ID in applications that operate below 0°C or above +70°C. In commercial-temperature applications, the two parts are interchangeable.
What does the "E4" suffix on the AM26C31CDE4 indicate?
The "E4" suffix is a Texas Instruments ordering designator indicating that the device is manufactured with Pb-free (RoHS-compliant) termination finish and green molding compound, in accordance with TI's environmental packaging standards.
Which device should be selected for an industrial-temperature RS-422 design?
The AM26C31ID should be selected for industrial applications requiring operation from -40°C to +85°C. The AM26C31CDE4 is limited to the commercial range of 0°C to +70°C and is not specified for industrial temperature operation.