Part A
AM26LS32AIDR
Texas Instruments
- Lifecycle
- Active
- Stock
- 1798 PCS
- Package
- SOIC-16
- Series
- Interfaces - pilotes, récepteurs, émetteurs - récepteurs
Replacement verdict
Not a drop-in replacement
The AM26LS32AIDR and AM26LV31EIDRG4 are not functionally interchangeable: the former is a quad differential line receiver while the latter is a quad differential line driver, so their signal direction, logic family, and supply requirements differ fundamentally. Direct substitution is not possible without redesigning the interface.
Different signal direction
Different logic family
Different supply voltage
Different output structure
Parts at a glance
Part B
AM26LV31EIDRG4
Texas Instruments
- Lifecycle
- Active
- Stock
- 4649 PCS
- Package
- SOIC-16
- Series
- Interfaces - pilotes, récepteurs, émetteurs - récepteurs
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AM26LS32AIDR | AM26LV31EIDRG4 | Why it matters |
|---|---|---|---|
| Function | Quad differential line receiver | Quad differential line driver | A receiver and a driver serve opposite roles in a differential link, so they are not directly substitutable for one another. |
| Signal direction | Receives differential inputs, outputs single-ended | Accepts single-ended inputs, drives differential outputs | Direction determines whether the device can be placed on the receiving or transmitting end of a bus. |
| Supply voltage (VCC) | 5 V nominal | 3.3 V nominal | Different supply rails affect logic-level compatibility and whether the part can drop into an existing 3.3 V or 5 V design. |
| Logic family | RS-422/RS-423 (5 V) | RS-422 low-voltage (3.3 V) | The logic family defines the electrical standard and interoperability with other bus transceivers. |
| Number of drivers/receivers | 0 drivers / 4 receivers | 4 drivers / 0 receivers | Channel count and type must match the bus topology and the number of lines being driven or sensed. |
| Output type | Tri-state single-ended outputs | Tri-state differential outputs | Output structure determines whether the device produces a differential pair or a single-ended logic signal. |
| Package | SOIC-16 (16-pin) | SOIC-16 (16-pin) | Package footprint and pin count affect board layout and whether the part can physically replace another on the same pad pattern. |
| Operating temperature range | -40°C to +85°C | -40°C to +85°C | The temperature range must cover the application environment for reliable operation. |
| Data rate capability | Up to ~10 Mbps (RS-422) | Up to ~32 Mbps (RS-422) | Maximum data rate limits the achievable bus speed and must meet the system's signaling requirements. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AM26LS32AIDR | AM26LV31EIDRG4 |
|---|---|---|
| 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 | 3V ~ 3.6V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount |
| Receiver Hysteresis | 50 mV | - |
Frequently asked questions
What are the primary functional differences between the AM26LS32AIDR and AM26LV31EIDRG4?
The AM26LS32AIDR is a quad differential line receiver designed for RS-422, RS-423, and RS-485 applications, while the AM26LV31EIDRG4 is a quad differential line driver optimized for low-voltage (3.3 V) RS-422 and RS-485 systems. One is a receiver and the other is a driver, so they serve complementary but distinct roles in a differential communication link.
Can the AM26LS32AIDR and AM26LV31EIDRG4 be used together in the same RS-422/RS-485 system?
Yes. Because the AM26LV31EIDRG4 is a driver and the AM26LS32AIDR is a receiver, they can be paired across a differential bus, provided the supply voltages, common-mode range, and signaling levels are validated against the respective datasheets for the target design.
What supply voltage does each device require?
The AM26LS32AIDR operates from a single 5 V supply, consistent with the standard AM26LS32A family. The AM26LV31EIDRG4 is a low-voltage device intended for 3.3 V operation. Designs mixing the two must account for the different supply rails and any level-shifting or interface considerations.
Do both parts come in the same package type?
Both the AM26LS32AIDR and AM26LV31EIDRG4 are offered in SOIC packages with the "D" suffix and tape-and-reel "R" suffix in their part numbers. However, pin functions differ because one is a receiver and the other is a driver, so the packages are not pin-for-pin interchangeable in function.
Are the AM26LS32AIDR and AM26LV31EIDRG4 drop-in replacements for each other?
No. They are not drop-in replacements because they perform opposite functions (receiver versus driver) and operate from different nominal supply voltages. Substitution requires a full review of the system architecture, supply, and signal levels against the manufacturer datasheets.
What are typical applications for each device?
The AM26LS32AIDR is typically used as a differential receiver in balanced transmission lines, industrial control, and data acquisition systems. The AM26LV31EIDRG4 is typically used as a low-voltage differential driver in 3.3 V RS-422/RS-485 networks, point-to-point links, and industrial interfaces where reduced supply voltage is required.
Do both devices support the same data signaling standards?
Both are associated with balanced differential signaling used in RS-422 and RS-485 systems, but their roles differ: the AM26LS32AIDR receives differential signals, while the AM26LV31EIDRG4 drives them. Designers should confirm compliance with the specific standard and electrical limits in each manufacturer datasheet.