Part A
AM26C31CDR
Texas Instruments
- Lifecycle
- Active
- Stock
- 5213 Stückzahl
- Package
- SOIC-16
- Series
- Interface-Treiber, Empfänger, Transceiver
Replacement verdict
Compatible functional replacement candidate
The AM26C31CDR and AM26C31IDRE4 are functionally equivalent quad differential line drivers sharing the same logic function, package, and pinout, with the primary distinction being the industrial temperature range of the IDRE4 variant. The AM26C31IDRE4 is a suitable functional replacement candidate for the AM26C31CDR in applications requiring an extended operating temperature range, while both devices remain interchangeable for standard commercial-temperature designs.
Logic Function
High match
Package Type
High match
Pin Configuration
High match
Operating Temperature Range
Validation required
Parts at a glance
Part B
AM26C31IDRE4
Texas Instruments
- Lifecycle
- Active
- Stock
- 9269 Stückzahl
- Package
- SOIC-16
- Series
- Interface-Treiber, Empfänger, Transceiver
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 | AM26C31IDRE4 | 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 the same circuit role. |
| Number of Drivers | 4 | 4 | The driver count must match to preserve the number of differential channels available in the design. |
| Supply Voltage Range | 4.5 V to 5.5 V | 4.5 V to 5.5 V | Compatible supply range ensures the part operates correctly on the same 5 V rail without redesign. |
| Output Type | Differential (3-state) | Differential (3-state) | Three-state differential outputs allow bus sharing and match the signaling requirements of the interface. |
| Package / Case | 16-SOIC | 16-SOIC | Identical package and footprint allow drop-in board replacement without layout changes. |
| Mounting Type | Surface Mount | Surface Mount | Same mounting style ensures compatibility with the existing PCB assembly process. |
| Operating Temperature Range | 0°C to 70°C | -40°C to 85°C | The industrial-grade temperature range of the IDRE4 variant supports harsher environments where the commercial-grade CDR may not be rated. |
| Data Rate | Up to 10 Mbps | Up to 10 Mbps | Matching data rate capability ensures the replacement meets the same throughput requirements of the link. |
| RoHS Compliance | RoHS compliant | RoHS compliant | Both parts meet RoHS requirements, so environmental and regulatory compliance is preserved. |
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 | AM26C31IDRE4 |
|---|---|---|
| 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 | 0°C ~ 70°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the AM26C31CDR and AM26C31IDRE4?
Both are quadruple differential line drivers from Texas Instruments, part of the AM26C31 family, designed to meet the requirements of TIA/EIA-422-B and ITU Recommendation V.11. They are offered in a 16-pin SOIC package (D suffix) and supplied in tape and reel (R suffix).
What is the difference between the AM26C31CDR and AM26C31IDRE4?
The primary difference is the operating temperature range. The AM26C31CDR (C-grade) is specified for 0°C to 70°C, while the AM26C31IDRE4 (I-grade) is specified for -40°C to 85°C. Both share the same function, package (SOIC-16), and tape-and-reel packaging.
Are the AM26C31CDR and AM26C31IDRE4 pin-compatible?
Yes. Both devices use the same 16-pin SOIC (D) package with identical pin assignments, so they are pin-compatible and share the same PCB land pattern.
Can the AM26C31CDR and AM26C31IDRE4 be used interchangeably in a design?
They are functionally and pin-compatible, but interchangeability depends on the application's ambient temperature. The AM26C31CDR is limited to 0°C to 70°C, whereas the AM26C31IDRE4 supports -40°C to 85°C. The I-grade part should be used where the operating environment exceeds the C-grade range.
What are the key electrical specifications common to both devices?
Both are 5 V powered quadruple differential line drivers with 3-state outputs, capable of driving balanced lines. They feature low supply current, high output impedance in power-off conditions, and are designed for digital data transmission over balanced lines per TIA/EIA-422-B and V.11.
What does the "R" suffix indicate on both part numbers?
The "R" suffix indicates tape-and-reel packaging, which is the standard shipping format for automated SMT assembly. Both the AM26C31CDR and AM26C31IDRE4 are supplied in reel form.
Which part should be selected for an industrial temperature environment?
The AM26C31IDRE4 should be selected for industrial environments, as its -40°C to 85°C operating range covers conditions outside the 0°C to 70°C range of the AM26C31CDR.