Part A
AM26C31QDR
德州儀器
- Lifecycle
- Active
- Stock
- 1424 件
- Package
- SOIC-16
- Series
- 介面-驅動器、接收器、收發器
Replacement verdict
Compatible functional replacement candidate
The AM26C31QDR and AM26C31IDE4 are functionally equivalent quad differential line drivers sharing the same AM26C31 core, logic function, and electrical characteristics; the primary distinction is package and qualification grade, so the AM26C31IDE4 can serve as a functional substitute for the AM26C31QDR where the SOIC-16 footprint and industrial temperature range are acceptable.
Logic Function
High match
Electrical Characteristics
High match
Package Type
Validation required
Operating Temperature Range
Validation required
Parts at a glance
Part B
AM26C31IDE4
德州儀器
- Lifecycle
- Active
- Stock
- 3690 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 | AM26C31QDR | AM26C31IDE4 | 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 RS-422/RS-485 driver applications. |
| Number of Drivers | 4 | 4 | The driver count determines how many differential lines each device can drive; identical counts ensure equivalent channel capacity. |
| Supply Voltage (VCC) | 4.5 V to 5.5 V | 4.5 V to 5.5 V | Matching supply ranges confirm both parts operate in the same 5 V system without requiring rail adjustments. |
| Output Type | Differential (3-state) | Differential (3-state) | Three-state differential outputs allow bus sharing and are essential for multipoint RS-422/RS-485 networks. |
| Data Rate | Up to 10 Mbps | Up to 10 Mbps | The maximum signaling rate must meet the application's bandwidth; identical ratings mean equivalent throughput capability. |
| Package / Mounting | SOIC-16 (surface mount) | SOIC-16 (surface mount) | Package and mounting style affect PCB footprint and assembly; both use the same SOIC-16 footprint, enabling drop-in board compatibility. |
| Operating Temperature Range | -40 °C to 125 °C | -40 °C to 85 °C | The wider temperature range of the QDR variant suits harsher environments, while the IDE4 covers standard industrial ranges. |
| Qualification / Grade | Automotive Q100 qualified | Industrial grade | Automotive qualification indicates stricter reliability and testing; substituting an industrial part in automotive designs may not meet qualification requirements. |
| RoHS Compliance | RoHS compliant | RoHS compliant | Both parts meet RoHS environmental regulations, so no compliance conflict arises when substituting one for the other. |
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 | AM26C31QDR | AM26C31IDE4 |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC,Texas Instruments |
| Part Status | Active | Discontinued at Digi-Key |
| Type | - | Driver |
| Number of Drivers/Receivers | - | 4/0 |
| Voltage - Supply | - | 4.5V ~ 5.5V |
| Operating Temperature | - | -40°C ~ 85°C |
| Mounting Type | - | Surface Mount |
Frequently asked questions
What are the AM26C31QDR and AM26C31IDE4?
Both are quad differential line drivers from Texas Instruments that meet TIA/EIA-422-B and ITU Recommendation V.11 specifications. They are functionally identical devices; the difference lies in package type and ordering suffix.
What is the difference between the AM26C31QDR and AM26C31IDE4?
The AM26C31QDR is supplied in a 16-pin SOIC package (D suffix) on a 2500-unit reel (R suffix), while the AM26C31IDE4 is supplied in a 16-pin SOIC package (D suffix) in a tube (E4 suffix). Both use the same die and electrical specifications; only the packaging and shipment format differ.
Are the AM26C31QDR and AM26C31IDE4 electrically interchangeable?
Yes. Both devices share the same datasheet parameters, including supply voltage range of 4.5 V to 5.5 V, differential output voltage, propagation delay, and pinout. They can be used interchangeably in the same PCB footprint.
What is the recommended supply voltage for these devices?
Both the AM26C31QDR and AM26C31IDE4 operate from a single 5 V nominal supply, with a specified range of 4.5 V to 5.5 V per the Texas Instruments datasheet.
What is the pin configuration of the AM26C31QDR and AM26C31IDE4?
Both devices use a 16-pin SOIC package with four differential driver pairs. Each driver has a single-ended input (1A, 2A, 3A, 4A) and complementary outputs (1Y/1Z, 2Y/2Z, 3Y/3Z, 4Y/4Z), plus a common enable input. The pinout is identical between the two orderable part numbers.
Do these devices support tri-state output?
Yes. Both the AM26C31QDR and AM26C31IDE4 feature a common enable pin that places all four differential outputs in a high-impedance state when disabled, allowing multiplexed bus operation.
What data rate can the AM26C31QDR and AM26C31IDE4 support?
Per the Texas Instruments datasheet, both devices are specified for operation up to 32 Mbps, making them suitable for balanced differential data transmission over twisted-pair cabling.
Which applications are these line drivers intended for?
Both parts are designed for balanced differential transmission in RS-422 and RS-485 style systems, including industrial control, motor drive interfaces, and point-to-point data links. They are not isolated drivers and should not be used where galvanic isolation is required.