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 AM26C31CDRG4 are functionally equivalent quad differential line drivers sharing the same RS-422/RS-485 interface architecture, logic family, and electrical characteristics; the primary distinction lies in package format and ordering suffix, making the CDRG4 a viable functional substitute for the ID where reel packaging and the SOIC footprint are acceptable.
Function and Logic Family
High match
Electrical Characteristics
High match
Package Type
High match
Ordering and Packaging Format
Validation required
Parts at a glance
Part B
AM26C31CDRG4
Texas Instruments
- Lifecycle
- Active
- Stock
- 7066 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 | AM26C31CDRG4 | Why it matters |
|---|---|---|---|
| Function | Quadruple differential line driver | Quadruple differential line driver | Both devices perform the same core function, so they are functionally interchangeable at the system level. |
| Number of Drivers | 4 | 4 | The driver count determines how many differential lines each device can drive, affecting channel capacity in a design. |
| Supply Voltage Range | 4.5 V to 5.5 V | 4.5 V to 5.5 V | The supply range must match the system rail to ensure reliable operation and logic-level compatibility. |
| Output Type | Differential (3-state) | Differential (3-state) | Three-state differential outputs allow bus sharing and are essential for multipoint or shared-line topologies. |
| Data Rate | Up to 10 Mbps | Up to 10 Mbps | The maximum data rate determines whether the device meets the bandwidth requirements of the communication interface. |
| Operating Temperature Range | -40 °C to 85 °C | -40 °C to 85 °C | The temperature range must cover the application environment to guarantee specified performance and reliability. |
| Package / Mounting | 16-SOIC (surface mount) | 16-SOIC (surface mount, tape and reel) | Package and packaging form affect PCB footprint compatibility and assembly handling; the DRG4 suffix indicates tape-and-reel delivery for automated production. |
| Product Grade / Qualification | Standard industrial grade | Standard commercial grade (tape and reel) | Grade and qualification differences can affect environmental robustness and sourcing suitability for a given application. |
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 | AM26C31CDRG4 |
|---|---|---|
| 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 AM26C31CDRG4?
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.
What is the difference between the AM26C31ID and AM26C31CDRG4?
The AM26C31ID is supplied in a 16-pin SOIC package (D suffix) and is specified over the -40°C to 85°C industrial temperature range. The AM26C31CDRG4 is supplied in a 16-pin SOIC package in tape-and-reel form (DR suffix) with the "G4" green/RoHS-compliant material designation, and is specified over the 0°C to 70°C commercial temperature range.
Are the AM26C31ID and AM26C31CDRG4 electrically and functionally interchangeable?
Yes. Both devices share the same quadruple differential line driver function, the same 16-pin SOIC pinout, and the same electrical characteristics per the datasheet. The primary differences are the temperature grade and the packaging/material designation, so they are functionally interchangeable where the operating temperature range is respected.
What supply voltage do the AM26C31ID and AM26C31CDRG4 require?
Both devices operate from a single 5 V supply (nominal), with the datasheet specifying a recommended supply voltage range of 4.5 V to 5.5 V.
What output drive capability do these devices provide?
Both the AM26C31ID and AM26C31CDRG4 provide differential outputs capable of driving balanced lines, with the datasheet specifying output current capability suitable for TIA/EIA-422-B balanced transmission. Refer to the manufacturer datasheet for the exact output high/low current and voltage specifications.
Do the AM26C31ID and AM26C31CDRG4 support three-state outputs?
Yes. Both devices feature three-state outputs controlled by enable inputs, allowing the driver outputs to be placed in a high-impedance state for bus or multipoint applications.
What is the difference in operating temperature range between the two parts?
The AM26C31ID is rated for the industrial temperature range of -40°C to 85°C. The AM26C31CDRG4 is rated for the commercial temperature range of 0°C to 70°C. Designs requiring operation below 0°C should use the I-grade device.
What does the "G4" suffix on the AM26C31CDRG4 indicate?
The "G4" suffix is Texas Instruments' designation for green/RoHS-compliant packaging, indicating the device is manufactured with lead-free (Pb-free) termination finish and complies with RoHS requirements. The AM26C31ID is also available in RoHS-compliant packaging per TI's standard material declarations.