Part A
AM26LS32AID
德州儀器
- Lifecycle
- Active
- Stock
- 1948 件
- Package
- SOIC-16
- Series
- 介面-驅動器、接收器、收發器
Replacement verdict
Not a drop-in replacement
The AM26LS32AID and AM26LS31CDE4 are not functionally interchangeable despite sharing the same RS-422/RS-485 interface family. The AM26LS32AID is a quad differential line receiver, while the AM26LS31CDE4 is a quad differential line driver, so their signal direction, I/O architecture, and application roles are fundamentally different. Direct substitution is not possible without redesigning the interface circuit.
Different device function
Different signal direction
Different I/O architecture
Different application role
Parts at a glance
Part B
AM26LS31CDE4
德州儀器
- Lifecycle
- Active
- Stock
- 8888 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 | AM26LS32AID | AM26LS31CDE4 | Why it matters |
|---|---|---|---|
| Function | Quadruple differential line receiver | Quadruple differential line driver | Receiver vs. driver roles are not interchangeable; a receiver cannot transmit and a driver cannot receive, so they serve opposite ends of a differential link. |
| Device type | Receiver | Driver | Determines signal direction and whether the part can be used at the transmitting or receiving side of an RS-422/RS-485 bus. |
| Number of drivers | 0 | 4 | Driver count defines how many differential output channels are available for transmitting data onto the bus. |
| Number of receivers | 4 | 0 | Receiver count defines how many differential input channels are available for receiving data from the bus. |
| Output type | Tri-state | Tri-state | Tri-state outputs allow the device to be disconnected from the bus, enabling shared-bus architectures and multiplexing. |
| Supply voltage (typ.) | 5 V | 5 V | Both operate from a 5 V supply, so power-rail compatibility is maintained in mixed receiver/driver designs. |
| Operating temperature range | -40°C to +85°C | 0°C to +70°C | The wider industrial temperature range of the receiver suits harsher environments, while the driver is limited to commercial temperatures. |
| Package / mounting | 16-SOIC (surface mount) | 16-SOIC (surface mount) | Matching package and mounting style allows both parts to share the same PCB footprint and assembly process. |
| Standard compliance | RS-422 / RS-423 / RS-485 compatible receiver | RS-422 / RS-423 compatible driver | Confirms the electrical signaling standards each part supports, which must align with the bus protocol used in the system. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AM26LS32AID | AM26LS31CDE4 |
|---|---|---|
| Supplier | - | Texas Instruments |
| Part Status | Active | Discontinued at Digi-Key |
| Type | Receiver | Driver |
| Protocol | RS422, RS423 | RS422, RS485 |
| Number of Drivers/Receivers | 0/4 | 4/0 |
| Voltage - Supply | 4.75V ~ 5.25V | 4.75V ~ 5.25V |
| Operating Temperature | -40°C ~ 85°C | 0°C ~ 70°C |
| Mounting Type | Surface Mount | Surface Mount |
| Receiver Hysteresis | 50 mV | - |
Frequently asked questions
What are the primary functional differences between the AM26LS32AID and the AM26LS31CDE4?
The AM26LS32AID is a quad differential line receiver, while the AM26LS31CDE4 is a quad differential line driver. The receiver converts differential input signals to TTL-compatible outputs, whereas the driver converts TTL inputs to differential outputs compliant with RS-422/RS-485 signaling.
Are the AM26LS32AID and AM26LS31CDE4 pin-compatible and interchangeable?
No. Although both are 16-pin devices, they serve opposite functions (receiver vs. driver) and have different pin assignments and internal circuitry. They are not direct substitutes for one another in a given socket.
What supply voltage do the AM26LS32AID and AM26LS31CDE4 require?
Both devices operate from a single 5 V nominal supply. The AM26LS32AID receiver is specified for 5 V operation, and the AM26LS31CDE4 driver is also specified for 5 V operation per their respective manufacturer datasheets.
What package types are the AM26LS32AID and AM26LS31CDE4 offered in?
The AM26LS32AID is supplied in a 16-pin SOIC package. The AM26LS31CDE4 is supplied in a 16-pin SOIC package as well. Package footprint compatibility should still be verified against the specific manufacturer datasheet before layout reuse.
Do the AM26LS32AID and AM26LS31CDE4 support the same signaling standards?
The AM26LS31CDE4 driver is designed for balanced differential transmission compatible with RS-422 and related standards. The AM26LS32AID receiver is designed to receive differential signals and provide TTL-level outputs. They are typically used together in a driver/receiver pair for balanced differential communication.
What are the operating temperature ranges for the AM26LS32AID and AM26LS31CDE4?
The AM26LS32AID is specified for the industrial temperature range of -40 °C to +85 °C. The AM26LS31CDE4 is specified for the commercial temperature range of 0 °C to +70 °C. Designers should confirm the exact grade against the manufacturer datasheet for the specific orderable part number.
Can the AM26LS32AID and AM26LS31CDE4 be used together in a single communication link?
Yes. A common configuration uses the AM26LS31CDE4 as the differential driver at the transmitting end and the AM26LS32AID as the differential receiver at the receiving end, forming a balanced differential data link. The system designer must verify termination, cable characteristics, and common-mode range against both datasheets.