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 AM26LS31CDG4 are not functionally interchangeable: the AM26LS32AID is a quad differential line receiver, while the AM26LS31CDG4 is a quad differential line driver. Their signal direction, I/O architecture, and application roles are fundamentally different, so one cannot directly replace the other in an existing design.
Different device function
Different signal direction
Different I/O architecture
Different application role
Parts at a glance
Part B
AM26LS31CDG4
德州儀器
- Lifecycle
- Active
- Stock
- 8504 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 | AM26LS31CDG4 | 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 outputs the device can actively transmit; a receiver-only part has none. |
| Number of receivers | 4 | 0 | Receiver count defines how many differential input channels the device can accept; a driver-only part has none. |
| Output type | 3-state | 3-state | Three-state outputs allow bus sharing, but the receiver's 3-state applies to logic outputs while the driver's applies to differential outputs. |
| Supply voltage (typical) | 5 V | 5 V | Both operate from a 5 V supply, so power rail compatibility is maintained, though the functional role still differs. |
| 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 footprint allow board-level compatibility, but the differing function prevents direct substitution. |
| Protocol compatibility | RS-422 / RS-485 receiver | RS-422 / RS-485 driver | Both target the same differential standards but occupy complementary roles, so they are used together rather than interchangeably. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AM26LS32AID | AM26LS31CDG4 |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC,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 AM26LS31CDG4?
The AM26LS32AID is a quad differential line receiver, while the AM26LS31CDG4 is a quad differential line driver. They perform complementary functions in balanced transmission systems: the AM26LS31CDG4 drives signals onto a twisted-pair or balanced line, and the AM26LS32AID receives those differential signals at the other end.
Are the AM26LS32AID and AM26LS31CDG4 pin-compatible and interchangeable?
No. Although both are offered in a 16-pin SOIC package, they are not interchangeable because one is a receiver (AM26LS32AID) and the other is a driver (AM26LS31CDG4). Their pin functions and internal circuitry differ, so substituting one for the other will not provide the intended signal direction or electrical function.
What supply voltage do the AM26LS32AID and AM26LS31CDG4 require?
Both devices operate from a single 5 V nominal supply. The AM26LS32AID receiver and the AM26LS31CDG4 driver are specified for 5 V operation, consistent with the standard AM26LS31/AM26LS32 families.
Do the AM26LS32AID and AM26LS31CDG4 support tri-state outputs?
Yes. The AM26LS31CDG4 driver provides tri-state outputs controlled by an enable pin, allowing the outputs to be placed in a high-impedance state. The AM26LS32AID receiver also provides tri-state outputs, enabling bus-oriented or multiplexed receiver configurations.
What are the package and temperature grade differences between the AM26LS32AID and AM26LS31CDG4?
Both parts are available in a 16-pin SOIC package. The AM26LS32AID is specified for the industrial temperature range, while the AM26LS31CDG4 is specified for the commercial temperature range (0°C to 70°C). The suffix differences reflect these temperature grade and packaging distinctions.
Can the AM26LS32AID and AM26LS31CDG4 be used together in the same RS-422/RS-485 link?
Yes. A common configuration uses the AM26LS31CDG4 as the differential driver at the transmitting end and the AM26LS32AID as the differential receiver at the receiving end of a balanced line. This pairing is typical for RS-422 and RS-485 style point-to-point or multidrop links, provided the system-level termination and common-mode requirements are met.
What input/output characteristics distinguish the AM26LS32AID receiver from the AM26LS31CDG4 driver?
The AM26LS32AID receiver accepts differential inputs and provides TTL-compatible outputs, with a specified input sensitivity and common-mode range suitable for balanced line reception. The AM26LS31CDG4 driver accepts TTL-compatible inputs and produces differential outputs with specified output voltage swing and drive capability for balanced lines. These complementary characteristics are why they are used as a receiver/driver pair rather than as substitutes.