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 AM26C31CDG4 are functionally equivalent quad differential line drivers from the same manufacturer family, sharing identical logic function, channel count, supply voltage range, and SOIC-16 package footprint. The only distinction is the ordering suffix denoting Pb-free/RoHS green packaging (G4) versus standard packaging (CDR), making them interchangeable in most designs with no electrical or layout impact.
Logic Function
High match
Channel Count
High match
Package Type
High match
Environmental Compliance
Validation required
Parts at a glance
Part B
AM26C31CDG4
德州儀器
- Lifecycle
- Active
- Stock
- 6972 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 | AM26C31CDG4 | 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 a circuit. |
| 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 | Matching supply ranges ensure the part operates correctly within the same power rail of the system. |
| Output Type | Differential (3-state) | Differential (3-state) | The 3-state differential output allows bus sharing and must be identical for drop-in compatibility. |
| Data Rate | Up to 10 Mbps | Up to 10 Mbps | The maximum signaling rate determines whether the device meets the bandwidth needs of the interface. |
| Package / Mounting | 16-SOIC, surface mount | 16-SOIC, surface mount | Identical package and mounting style allow the parts to share the same PCB footprint. |
| Operating Temperature Range | -40 °C to 85 °C | -40 °C to 85 °C | The temperature range must cover the application environment for reliable operation. |
| RoHS Compliance | RoHS compliant | RoHS compliant (G4 suffix) | Both are RoHS compliant; the G4 suffix explicitly denotes the lead-free/RoHS version, relevant for regulatory compliance. |
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Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AM26C31CDR | AM26C31CDG4 |
|---|---|---|
| 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 | 0°C ~ 70°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the AM26C31CDR and AM26C31CDG4?
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 intended for balanced transmission of digital data over twisted-pair or parallel-wire cables.
What is the difference between the AM26C31CDR and AM26C31CDG4?
The two part numbers differ only in packaging and ordering format. The AM26C31CDR is supplied in tape-and-reel format for automated assembly, while the AM26C31CDG4 is supplied in tube/rail format. Both use the same SOIC-16 (D) package and are electrically and functionally identical.
Are the AM26C31CDR and AM26C31CDG4 electrically interchangeable?
Yes. Because both devices share the same die, package (SOIC-16, D suffix), pinout, and specified electrical characteristics, they are functionally and electrically interchangeable. The only practical difference is the shipping media (reel versus tube), which affects handling and assembly equipment rather than circuit behavior.
What are the key electrical specifications of the AM26C31CDR and AM26C31CDG4?
Both devices operate from a single 5 V supply (typical), provide four differential line drivers with three-state outputs, and feature a common-mode output voltage range of approximately -7 V to +7 V. They support output current sufficient for RS-422 balanced transmission and are characterized for operation over the commercial temperature range of 0°C to 70°C.
What package do the AM26C31CDR and AM26C31CDG4 use?
Both parts are offered in the SOIC-16 package, identified by the Texas Instruments "D" package suffix. The package is a 16-pin small-outline integrated circuit with a 1.27 mm (0.050 in) lead pitch, suitable for surface-mount assembly.
Can the AM26C31CDR and AM26C31CDG4 be used interchangeably in an existing design?
Yes, from an electrical and footprint standpoint they are interchangeable because they share the same package, pinout, and specifications. The choice between them is driven by production requirements: the CDR reel format suits high-volume automated pick-and-place lines, while the CDG4 tube format is often used for prototyping, low-volume runs, or manual assembly.
What standards do the AM26C31CDR and AM26C31CDG4 comply with?
Both devices are designed to meet ANSI TIA/EIA-422-B and ITU Recommendation V.11 requirements for balanced digital data transmission. They are commonly used as RS-422 line drivers in industrial, instrumentation, and data-communication applications.