Part A
AM26LV31IDR
Техасские инструменты
- Lifecycle
- Active
- Stock
- 3059 ПКС
- Package
- SOIC-16
- Series
- Интерфейс - драйверы, приемники, передатчики
Replacement verdict
Not a drop-in replacement
The AM26LV31IDR and AM26LS32ACDE4 are not functionally interchangeable: the AM26LV31IDR is a quad low-voltage differential line driver, while the AM26LS32ACDE4 is a quad differential line receiver. Their signal direction, supply voltage range, and I/O characteristics differ fundamentally, so neither part can directly substitute for the other in an existing design.
Different device function
Different signal direction
Different supply voltage range
Different I/O characteristics
Parts at a glance
Part B
AM26LS32ACDE4
Техасские инструменты
- Lifecycle
- Active
- Stock
- 9006 ПКС
- Package
- SOIC-16
- Series
- Интерфейс - драйверы, приемники, передатчики
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AM26LV31IDR | AM26LS32ACDE4 | Why it matters |
|---|---|---|---|
| Function | Quadruple differential line driver | Quadruple differential line receiver | A driver and a receiver serve opposite roles in a differential link, so they are not direct substitutes for the same socket function. |
| Interface Standard | RS-422 / RS-485 (TIA/EIA-422-B, TIA/EIA-485-A) | RS-422 / RS-423 / RS-485 (TIA/EIA-422-B, TIA/EIA-423-B, TIA/EIA-485-A) | The supported standards determine which serial buses the device can legally and reliably interface with. |
| Supply Voltage (VCC) | 3.0 V to 3.6 V | 4.75 V to 5.25 V | Different supply rails mean the parts cannot share the same power domain without level shifting or a rail change. |
| Output Type | Differential (3-state) driver outputs | Differential receiver with 3-state outputs | The output stage type dictates whether the device sources a differential signal or presents a logic-level received signal. |
| Number of Drivers / Receivers | 4 drivers, 0 receivers | 0 drivers, 4 receivers | Channel direction and count must match the bus topology to avoid redesigning the interface circuit. |
| Input Threshold / Sensitivity | Driver input: TTL-compatible logic levels | Receiver sensitivity: ±200 mV differential | Receiver sensitivity defines the minimum differential signal detectable, while driver input levels define logic compatibility. |
| Package / Mounting | SOIC-16, surface mount | SOIC-16, surface mount | Matching footprint and mounting style allows board-level interchangeability without layout changes. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | The temperature range confirms suitability for the same industrial operating environments. |
| Data Rate | Up to 32 Mbps | Up to 10 Mbps (typical for RS-422/485 receivers) | Maximum data rate limits the achievable bus speed and must satisfy the system's signaling requirements. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AM26LV31IDR | AM26LS32ACDE4 |
|---|---|---|
| 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 | 3V ~ 3.6V | 4.75V ~ 5.25V |
| Operating Temperature | -40°C ~ 85°C | 0°C ~ 70°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the primary functional differences between the AM26LV31IDR and the AM26LS32ACDE4?
The AM26LV31IDR is a quad low-voltage differential line driver designed to meet TIA/EIA-422-B and ITU Recommendation V.11, while the AM26LS32ACDE4 is a quad differential line receiver designed to meet TIA/EIA-422-B and TIA/EIA-423-B. One is a driver and the other is a receiver, so they serve complementary but opposite roles in a differential signaling link.
Can the AM26LV31IDR and AM26LS32ACDE4 be used together in the same differential link?
Yes. Because the AM26LV31IDR is a differential driver and the AM26LS32ACDE4 is a differential receiver, they can form a complete driver/receiver pair on a balanced differential bus, provided the signaling levels, supply voltages, and termination are validated against both datasheets for the specific application.
What supply voltage does each device require?
The AM26LV31IDR operates from a single 3.3 V supply (typically 3.0 V to 3.6 V), consistent with its low-voltage LV designation. The AM26LS32ACDE4 operates from a single 5 V supply. The differing supply rails must be considered when interfacing the two devices in one system.
How do the package options differ between the two parts?
The AM26LV31IDR is supplied in a 16-pin SOIC package (the "D" suffix in the orderable part number). The AM26LS32ACDE4 is supplied in a 16-pin SOIC package as well (the "D" suffix), with the "E4" suffix denoting Pb-free/RoHS-compliant construction. Both are 16-pin SOIC devices, but pin functions differ because one is a driver and the other a receiver.
Are the AM26LV31IDR and AM26LS32ACDE4 drop-in replacements for each other?
No. They are not interchangeable. The AM26LV31IDR is a line driver with driver inputs and differential outputs, while the AM26LS32ACDE4 is a line receiver with differential inputs and receiver outputs. Their pin functions, signal directions, and supply voltages differ, so substituting one for the other is not valid.
What are the typical signaling standards supported by each device?
The AM26LV31IDR is designed for TIA/EIA-422-B and ITU Recommendation V.11 balanced differential transmission. The AM26LS32ACDE4 is designed for TIA/EIA-422-B and TIA/EIA-423-B, giving it both balanced and unbalanced input capability as a receiver. Designers should confirm the exact standard compliance in the respective manufacturer datasheets.
Which device should be selected for a new 3.3 V differential driver design?
For a 3.3 V differential driver function, the AM26LV31IDR is the appropriate choice because it is specified for 3.3 V operation and provides quad differential driver outputs. The AM26LS32ACDE4 is a 5 V receiver and does not provide driver outputs, so it is not suitable for that role.