Part A
AM26LS31CD
Texas Instruments
- Lifecycle
- Active
- Stock
- 2633 PCS
- Package
- SOIC-16
- Series
- Interface - Drivers, Receivers, Transceivers
Replacement verdict
Compatible functional replacement candidate
The AM26LS31CDG4 is a Pb-free/RoHS-compliant variant of the AM26LS31CD quad differential line driver, sharing identical function, pinout, package, and electrical specifications. The two parts are functionally interchangeable in existing designs, with the G4 suffix denoting environmental compliance rather than any change in form, fit, or function.
Function and Output Type
High match
Package and Pinout
High match
Electrical Specifications
High match
Environmental Compliance
High match
Parts at a glance
Part B
AM26LS31CDG4
Texas Instruments
- Lifecycle
- Active
- Stock
- 8504 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 | AM26LS31CD | AM26LS31CDG4 | 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 | 4.75 V to 5.25 V | 4.75 V to 5.25 V | The operating supply window determines compatibility with the existing 5 V rail and tolerance margins. |
| Output Type | Differential (tri-state) | Differential (tri-state) | Tri-state differential outputs allow bus sharing and match the signaling requirements of RS-422/RS-485 style interfaces. |
| Package / Mounting | 16-SOIC, surface mount | 16-SOIC, surface mount | Identical package and mounting style ensure the part fits the same PCB footprint and assembly process. |
| Operating Temperature Range | 0°C to 70°C | 0°C to 70°C | The temperature range must cover the application environment for reliable operation. |
| Pin Count | 16 | 16 | Matching pin count confirms physical and electrical pinout compatibility for drop-in substitution. |
| Packaging / Ordering Suffix | Tube / standard (no G4 suffix) | G4 suffix (green/RoHS-compliant ordering variant) | The G4 suffix denotes a manufacturer ordering/packaging variant; the electrical function is the same, but procurement and compliance documentation differ. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AM26LS31CD | AM26LS31CDG4 |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC,Texas Instruments |
| Part Status | Active | Discontinued at Digi-Key |
| Type | Driver | Driver |
| Protocol | RS422, RS485 | RS422, RS485 |
| Number of Drivers/Receivers | 4/0 | 4/0 |
| Voltage - Supply | 4.75V ~ 5.25V | 4.75V ~ 5.25V |
| Operating Temperature | 0°C ~ 70°C | 0°C ~ 70°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What is the difference between the AM26LS31CD and the AM26LS31CDG4?
The AM26LS31CD and AM26LS31CDG4 are both quad differential line drivers from Texas Instruments in a 16-pin SOIC (D) package. The primary difference is the ordering suffix: the AM26LS31CD is supplied in standard tube/rail packaging, while the AM26LS31CDG4 is the same device supplied in Pb-free (RoHS-compliant) Green packaging. Both share identical electrical specifications and function.
Are the AM26LS31CD and AM26LS31CDG4 electrically and functionally identical?
Yes. Both devices are quad differential line drivers designed for balanced transmission lines and comply with TIA/EIA-422-B and ITU Recommendation V.11. They share the same supply voltage range (5 V nominal), input/output characteristics, propagation delays, and pinout. The G4 suffix denotes Pb-free/RoHS-compliant construction, not a functional change.
Can the AM26LS31CDG4 be used as a drop-in replacement for the AM26LS31CD?
Yes, in most cases. Both are the same die in the same 16-pin SOIC (D) package with identical pinout and electrical specifications. The AM26LS31CDG4 is the Pb-free/RoHS-compliant variant, so it is a direct functional replacement provided the assembly process supports Pb-free soldering and the design does not require the non-G4 ordering variant for legacy documentation reasons.
What is the function of the AM26LS31CD/AM26LS31CDG4?
These are quad differential line drivers intended for digital data transmission over balanced lines. Each device contains four independent drivers with three-state outputs, designed to meet the requirements of TIA/EIA-422-B and V.11. They are commonly used for RS-422 communication, industrial control, and data transmission applications.
What supply voltage do the AM26LS31CD and AM26LS31CDG4 require?
Both devices operate from a single 5 V supply (nominal), with the datasheet specifying a recommended operating supply voltage range of 4.75 V to 5.25 V. They are not specified for 3.3 V operation.
Do the AM26LS31CD and AM26LS31CDG4 have three-state outputs?
Yes. Both devices feature three-state outputs controlled by a common enable input, allowing the driver outputs to be placed in a high-impedance state for bus-oriented or multiplexed applications.
What package do the AM26LS31CD and AM26LS31CDG4 use?
Both are offered in the 16-pin SOIC package, designated by the "D" suffix in the part number. The package dimensions, pin count, and pinout are identical between the two ordering variants.
Does the G4 suffix affect the operating temperature range of the AM26LS31CDG4?
No. The G4 suffix indicates Pb-free/RoHS-compliant packaging and does not change the device's specified operating temperature range. Both the AM26LS31CD and AM26LS31CDG4 are specified for the commercial temperature range of 0°C to 70°C, consistent with the "C" suffix in the part number.