Part A
AM26LS32ACDR
텍사스 인스트루먼트(주)
- Lifecycle
- Active
- Stock
- 2449 PCS
- Package
- SOIC-16
- Series
- 인터페이스 - 드라이브, 수신기, 트랜시버
Replacement verdict
Not a drop-in replacement
The AM26LV31IDR and AM26LS32ACDR are not functionally interchangeable: the AM26LV31IDR is a quad low-voltage differential line driver, while the AM26LS32ACDR is a quad differential line receiver. Their opposing signal directions, differing supply voltage ranges, and distinct I/O structures make direct substitution impossible without redesigning the interface.
Different device function
Different signal direction
Different supply voltage range
Different I/O structure
Parts at a glance
Part B
AM26LV31IDR
텍사스 인스트루먼트(주)
- Lifecycle
- Active
- Stock
- 3059 PCS
- Package
- SOIC-16
- Series
- 인터페이스 - 드라이브, 수신기, 트랜시버
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 | AM26LS32ACDR | Why it matters |
|---|---|---|---|
| Function | Quadruple differential line driver | Quadruple differential line receiver | A driver and a receiver serve opposite roles in a differential link; they are not directly substitutable for one another. |
| Number of Drivers / Receivers | 4 drivers, 0 receivers | 0 drivers, 4 receivers | Determines whether the device transmits or receives differential signals in the bus topology. |
| Supply Voltage (VCC) | 3.0 V to 3.6 V | 4.75 V to 5.25 V | The two parts operate on different logic supply rails, so they cannot share the same power domain without level shifting. |
| Output / Input Type | 3-state differential outputs | 3-state differential inputs | Defines the electrical interface direction and whether the device can be disabled onto a shared bus. |
| Data Rate / Signaling | Up to 32 Mbps (RS-422 style) | Up to 10 Mbps (RS-422/RS-423 compatible) | Maximum supported data rate affects compatibility with the target bus speed and protocol. |
| Input Threshold / Sensitivity | TTL-compatible inputs | ±200 mV differential input sensitivity | Receiver sensitivity and driver input levels determine noise margin and interoperability with the opposite end of the link. |
| Package | 16-pin SOIC (D) | 16-pin SOIC (D) | Identical package and pin count allow board-level footprint compatibility, though pin functions differ. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Both meet industrial temperature requirements, so thermal environment is not a differentiator. |
| Standard Compliance | RS-422 / RS-485 signaling compatible | RS-422 / RS-423 compatible | Standards compliance governs interoperability with other nodes on the same differential bus. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AM26LS32ACDR | AM26LV31IDR |
|---|---|---|
| Part Status | Active | Active |
| Type | Receiver | Driver |
| Protocol | RS422, RS423 | RS422, RS485 |
| Number of Drivers/Receivers | 0/4 | 4/0 |
| Receiver Hysteresis | 50 mV | - |
| Voltage - Supply | 4.75V ~ 5.25V | 3V ~ 3.6V |
| Operating Temperature | 0°C ~ 70°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the primary functional differences between the AM26LV31IDR and AM26LS32ACDR?
The AM26LV31IDR is a quad low-voltage differential line driver designed to meet TIA/EIA-422-B and ITU Recommendation V.11, while the AM26LS32ACDR is a quad differential line receiver designed to meet TIA/EIA-422-B, TIA/EIA-423-B, and TIA/EIA-485-A. One is a driver and the other is a receiver, so they serve complementary but opposite roles in a differential transmission system.
Can the AM26LV31IDR and AM26LS32ACDR be used together in the same system?
Yes. Because the AM26LV31IDR is a differential driver and the AM26LS32ACDR is a differential receiver, they are commonly paired across a balanced transmission line. The driver converts single-ended logic signals to differential outputs, and the receiver converts the differential signals back to single-ended logic levels at the receiving end.
What are the supply voltage requirements for each device?
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 AM26LS32ACDR operates from a single 5 V supply (typically 4.75 V to 5.25 V). The differing supply voltages must be considered when interfacing the two devices in a shared system.
Do both devices use the same package and pinout?
Both devices are offered in a 16-pin SOIC package (the D suffix in both part numbers indicates SOIC). However, the internal pin functions differ because one is a driver and the other is a receiver, so the pinouts are not interchangeable. The AM26LV31IDR provides driver inputs and differential outputs, while the AM26LS32ACDR provides differential inputs and receiver outputs.
What are the output configurations of the AM26LV31IDR driver?
The AM26LV31IDR 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. The differential outputs are designed to drive balanced lines in accordance with TIA/EIA-422-B.
What input sensitivity and common-mode range does the AM26LS32ACDR receiver support?
The AM26LS32ACDR is a quad differential line receiver with a wide common-mode input range of -7 V to +7 V, making it suitable for party-line and multipoint bus applications. It features high input impedance and hysteresis for improved noise immunity, and its outputs are compatible with TTL logic levels.
Are these devices drop-in replacements for one another?
No. The AM26LV31IDR is a driver and the AM26LS32ACDR is a receiver, so they perform opposite functions and cannot be substituted for one another. Additionally, they differ in supply voltage (3.3 V versus 5 V) and pin function assignments, so each must be used in its intended role within a system design.