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 AM26LS31CDRE4 are not interchangeable despite sharing the same quad RS-422/RS-485 interface family. The AM26LS32AID is a quad differential line receiver, while the AM26LS31CDRE4 is a quad differential line driver, so their signal direction, I/O structure, and application roles are fundamentally different. Substitution would require a complementary driver/receiver pair rather than a direct part-for-part swap.
Different device function
Different signal direction
Different I/O structure
Different application role
Parts at a glance
Part B
AM26LS31CDRE4
德州儀器
- Lifecycle
- Active
- Stock
- 2303 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 | AM26LS31CDRE4 | Why it matters |
|---|---|---|---|
| Function | Quadruple differential line receiver | Quadruple differential line driver | A receiver and a driver serve opposite roles in a differential bus, so they are not direct substitutes for the same socket function. |
| Device type | Receiver | Driver | Determines the direction of signal flow and whether the part can replace the other in a given circuit position. |
| Number of drivers | 0 | 4 | Driver count defines how many differential outputs the device can transmit; a receiver has none. |
| Number of receivers | 4 | 0 | Receiver count defines how many differential inputs the device can accept; a driver has none. |
| Output type | 3-state | 3-state | Both offer tri-state outputs, but the receiver's tri-state applies to its logic outputs while the driver's applies to its differential outputs. |
| Supply voltage (typ) | 5 V | 5 V | Both operate from a nominal 5 V supply, so power rail compatibility is maintained. |
| Operating temperature range | -40°C to 85°C | 0°C to 70°C | The wider industrial temperature range of the receiver allows use in harsher environments than the commercial-range driver. |
| Package / mounting | 16-SOIC (surface mount) | 16-SOIC (surface mount) | Matching package and mounting style supports drop-in footprint compatibility on the PCB. |
| Protocol standard | RS-422 / RS-423 | RS-422 | The receiver supports both RS-422 and RS-423, while the driver is specified for RS-422, affecting which bus standards each can serve. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AM26LS32AID | AM26LS31CDRE4 |
|---|---|---|
| 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 AM26LS31CDRE4?
The AM26LS32AID is a quad differential line receiver, while the AM26LS31CDRE4 is a quad differential line driver. They perform complementary functions in balanced transmission systems: the AM26LS31CDRE4 drives signals onto a twisted-pair bus, and the AM26LS32AID receives those differential signals at the other end.
Are the AM26LS32AID and AM26LS31CDRE4 pin-compatible?
No. Both devices are housed in a 16-pin SOIC package, but their pin functions differ because one is a receiver and the other is a driver. The AM26LS32AID provides receiver outputs and enable inputs, whereas the AM26LS31CDRE4 provides driver inputs and tri-state enable controls, so they are not interchangeable on the same PCB footprint.
What supply voltage do the AM26LS32AID and AM26LS31CDRE4 require?
Both devices operate from a single 5 V nominal supply. The AM26LS32AID receiver is specified for 5 V operation, and the AM26LS31CDRE4 driver is likewise specified for a 5 V supply, consistent with their use in RS-422 and RS-423 balanced transmission systems.
Do these devices support tri-state outputs?
Yes. The AM26LS31CDRE4 driver features tri-state outputs controlled by enable pins, allowing the outputs to be placed in a high-impedance state for bus sharing. The AM26LS32AID receiver also provides tri-state outputs via its enable inputs, permitting multiple receivers to share a common output bus.
What are the operating temperature ranges for the AM26LS32AID and AM26LS31CDRE4?
The AM26LS32AID is specified for the industrial temperature range of -40°C to +85°C. The AM26LS31CDRE4 is specified for the commercial temperature range of 0°C to +70°C. This difference should be considered when selecting a device for a given thermal environment.
Can the AM26LS32AID and AM26LS31CDRE4 be used together in the same system?
Yes. Because one is a line driver and the other a line receiver, they are commonly used as a matched pair in balanced transmission links. The AM26LS31CDRE4 transmits differential signals over a twisted-pair cable, and the AM26LS32AID receives and converts those signals back to single-ended logic levels at the receiving end.
What package type do the AM26LS32AID and AM26LS31CDRE4 use?
Both devices are offered in a 16-pin SOIC (small-outline integrated circuit) package. The "D" suffix in both part numbers denotes the SOIC package option, and the "E4" suffix on the AM26LS31CDRE4 indicates Pb-free (RoHS-compliant) construction.