Part A
AM26C31CDR
德州儀器
- Lifecycle
- Active
- Stock
- 5213 件
- Package
- SOIC-16
- Series
- 介面-驅動器、接收器、收發器
Replacement verdict
Compatible functional replacement candidate
The AM26C31CDR and AM26C31CDE4 are functionally equivalent quad differential line drivers sharing the same device core, logic function, and electrical characteristics; the only distinction is the tape-and-reel versus tube packaging format. Both parts are suitable for direct substitution in RS-422/RS-485 transmission applications, with the choice driven solely by assembly and inventory handling preferences.
Device Function
High match
Package Type
High match
Electrical Characteristics
High match
Packaging Format
Validation required
Parts at a glance
Part B
AM26C31CDE4
德州儀器
- Lifecycle
- Active
- Stock
- 6869 件
- Package
- SOIC-16
- Series
- 介面-驅動器、接收器、收發器
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AM26C31CDR | AM26C31CDE4 | Why it matters |
|---|---|---|---|
| Function | Quadruple differential line driver | Quadruple differential line driver | Both parts must implement the same logic function to be functionally substitutable. |
| Number of Drivers | 4 | 4 | The driver count determines how many differential lines each device can drive in a system. |
| Supply Voltage (Typical) | 5 V | 5 V | The operating supply voltage must match the system rail for direct replacement. |
| Output Type | Differential (3-state) | Differential (3-state) | Three-state differential outputs allow bus sharing and match the signaling standard required by the application. |
| Package / Mounting | SOIC-16, surface mount | SOIC-16, surface mount | Package and mounting style must match the PCB footprint for a drop-in replacement. |
| Operating Temperature Range | -40 °C to 85 °C | -40 °C to 85 °C | The temperature range must cover the application environment for reliable operation. |
| Data Rate | Up to 10 Mbps | Up to 10 Mbps | The maximum data rate must meet the signaling speed requirements of the interface. |
| RoHS Compliance | RoHS compliant | RoHS compliant | Compliance affects regulatory acceptance and environmental requirements for the finished product. |
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 | AM26C31CDR | 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 | 0°C ~ 70°C | 0°C ~ 70°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the AM26C31CDR and AM26C31CDE4?
Both are quad differential line drivers from Texas Instruments, part of the AM26C31 family. They are designed to meet the requirements of ANSI TIA/EIA-422-B and ITU Recommendation V.11, and are used to drive balanced transmission lines in digital data transmission systems.
What is the difference between the AM26C31CDR and AM26C31CDE4?
The primary difference is the ordering suffix, which specifies packaging and shipment format. The AM26C31CDR is supplied in tape-and-reel format for automated assembly, while the AM26C31CDE4 is supplied in tube (rail) format. Both use the same SOIC-16 (D) package and have identical electrical specifications.
Are the AM26C31CDR and AM26C31CDE4 electrically identical?
Yes. Both devices share the same datasheet, die, and electrical characteristics, including supply voltage range of 4.5 V to 5.5 V, differential output voltage, propagation delay, and operating temperature range of -40°C to +85°C. The suffix only denotes packaging and shipping format.
Can the AM26C31CDR and AM26C31CDE4 be used interchangeably in a design?
Yes, from an electrical and footprint perspective they are interchangeable, since both are the same device in the same SOIC-16 (D) package. The choice between them depends on the assembly process: tape-and-reel (CDR) for automated pick-and-place lines, or tube (CDE4) for manual or low-volume assembly.
What is the pin configuration of the AM26C31CDR and AM26C31CDE4?
Both devices use the standard 16-pin SOIC pinout for the AM26C31: four differential driver outputs (1A, 1B, 2A, 2B, 3A, 3B, 4A, 4B), four driver inputs (1D, 2D, 3D, 4D), two enable inputs (1,2EN and 3,4EN), VCC on pin 16, and GND on pin 8.
What supply voltage and temperature range do the AM26C31CDR and AM26C31CDE4 support?
Both devices operate from a single 5 V supply with a specified range of 4.5 V to 5.5 V, and are rated for the commercial temperature range of -40°C to +85°C, as stated in the Texas Instruments datasheet.
Do the AM26C31CDR and AM26C31CDE4 meet TIA/EIA-422-B requirements?
Yes. Both devices are specified to meet or exceed the requirements of ANSI TIA/EIA-422-B and ITU Recommendation V.11 for balanced digital data transmission, providing the differential output voltage and common-mode characteristics required by those standards.
Which variant should be selected for high-volume automated production?
The AM26C31CDR is the appropriate choice for high-volume automated production because it is supplied in tape-and-reel format, which is compatible with automated pick-and-place assembly equipment. The AM26C31CDE4 tube format is better suited to manual or low-volume assembly.