Part A
AM26LS31CD
Texas Instruments
- Lifecycle
- Active
- Stock
- 2633 Stückzahl
- Package
- SOIC-16
- Series
- Interface-Treiber, Empfänger, Transceiver
Replacement verdict
Not a drop-in replacement
The AM26LS31CD and AM26LS32ACDG4 are not functionally interchangeable: the AM26LS31CD is a quad differential line driver, while the AM26LS32ACDG4 is a quad differential line receiver. Their signal direction, I/O architecture, and application roles differ fundamentally, so substituting one for the other is not feasible in a direct replacement scenario.
Different signal direction
Different I/O function
Different application role
Different internal architecture
Parts at a glance
Part B
AM26LS32ACDG4
Texas Instruments
- Lifecycle
- Active
- Stock
- 5692 Stückzahl
- Package
- SOIC-16
- Series
- Interface-Treiber, Empfänger, Transceiver
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 | AM26LS32ACDG4 | Why it matters |
|---|---|---|---|
| Function | Quadruple differential line driver | Quadruple differential line receiver | A driver and a receiver serve opposite roles in a differential bus; they are not functionally interchangeable in the same socket. |
| Device type | Line driver (transmitter) | Line receiver | Determines the direction of signal flow and whether the part can source or accept differential signals on the bus. |
| Number of drivers / receivers | 4 drivers | 4 receivers | Channel count and direction must match the bus architecture; a driver cannot replace a receiver channel. |
| Output / input configuration | Differential outputs (tri-state capable) | Differential inputs with 3-state outputs | The electrical interface direction (output vs input) defines compatibility with the connected bus node. |
| Supply voltage (VCC) | 5 V nominal | 5 V nominal | Both operate from a 5 V supply, so power rail compatibility is maintained even though function differs. |
| Package | SOIC-16 (D) | SOIC-16 (D) | Matching package and pin count allows physical fit, but pin functions differ between driver and receiver. |
| Standard compliance | RS-422 / RS-423 compatible driver | RS-422 / RS-423 compatible receiver | Both target the same differential standards, but one drives the line while the other terminates and receives it. |
| Operating temperature range | 0°C to 70°C | 0°C to 70°C | Identical commercial temperature ratings mean environmental tolerance is equivalent for both parts. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AM26LS31CD | AM26LS32ACDG4 |
|---|---|---|
| Supplier | - | Texas Instruments |
| Part Status | Active | Discontinued at Digi-Key |
| Type | Driver | Receiver |
| Protocol | RS422, RS485 | RS422, RS423 |
| Number of Drivers/Receivers | 4/0 | 0/4 |
| Receiver Hysteresis | - | 50 mV |
| 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 are the primary functional differences between the AM26LS31CD and the AM26LS32ACDG4?
The AM26LS31CD is a quad differential line driver designed to meet the requirements of RS-422 and RS-423, while the AM26LS32ACDG4 is a quad differential line receiver intended for RS-422, RS-423, and RS-485 applications. The AM26LS31CD transmits differential signals, whereas the AM26LS32ACDG4 receives them, making them complementary rather than interchangeable.
Can the AM26LS31CD and AM26LS32ACDG4 be used together in a single communication link?
Yes. The AM26LS31CD driver and AM26LS32ACDG4 receiver are commonly paired to form a complete differential data transmission link, as the driver's differential outputs are compatible with the receiver's differential inputs for RS-422/RS-423 signaling.
What are the supply voltage requirements for each device?
Both the AM26LS31CD and AM26LS32ACDG4 operate from a single 5 V nominal supply. The AM26LS31CD is specified over a supply range of 4.75 V to 5.25 V, and the AM26LS32ACDG4 is specified over the same 4.75 V to 5.25 V range per their respective datasheets.
Do both devices share the same package and pinout?
Both devices are offered in a 16-pin SOIC package (the "D" suffix in both part numbers). However, the pin functions differ because one is a driver and the other is a receiver; the pinouts are not interchangeable and each must be wired according to its own datasheet.
What are the output configurations of the AM26LS31CD driver?
The AM26LS31CD provides four differential line drivers with three-state outputs. Each driver features a dedicated output enable, allowing the outputs to be placed in a high-impedance state for bus-sharing applications.
What input characteristics does the AM26LS32ACDG4 receiver offer?
The AM26LS32ACDG4 provides four differential line receivers with a common-mode input voltage range of -7 V to +7 V and input sensitivity of ±200 mV, which is suitable for RS-422/RS-423/RS-485 differential signaling. It also includes a fail-safe feature that ensures a high output when the inputs are open.
Are the AM26LS31CD and AM26LS32ACDG4 drop-in replacements for each other?
No. Because one is a line driver and the other is a line receiver, they perform opposite functions and cannot be substituted for one another. Selection must be based on whether the design requires signal transmission (driver) or signal reception (receiver).
What operating temperature range do these devices support?
Both the AM26LS31CD and AM26LS32ACDG4 are specified for operation over the commercial temperature range of 0°C to 70°C, as indicated by the "C" suffix in their part numbers.