Part A
AM26LV31EIDR
Texas Instruments
- Lifecycle
- Active
- Stock
- 4713 PCS
- Package
- SOIC-16
- Series
- Interface - Condutores, Receptores, Transceivers
Replacement verdict
Compatible functional replacement candidate
The AM26LV31EIDR is a functional replacement candidate for the AM26LS33ACDR in 3.3 V low-voltage differential signaling applications, but it is not a direct drop-in substitute. The two devices share the same quad differential driver function and SOIC-16 footprint, yet they differ in supply voltage range, signaling standard, and output drive characteristics. Designers must validate supply compatibility, termination, and output levels before substituting in an existing 5 V RS-422/RS-485 design.
Supply Voltage Range
Validation required
Signaling Standard
Validation required
Package Type
High match
Output Drive Characteristics
Validation required
Parts at a glance
Part B
AM26LS33ACDR
Texas Instruments
- Lifecycle
- Active
- Stock
- 1505 PCS
- Package
- SOIC-16
- Series
- Interface - Condutores, Receptores, Transceivers
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AM26LS33ACDR | AM26LV31EIDR | Why it matters |
|---|---|---|---|
| Function | Quadruple differential line receiver | Quadruple differential line driver | A receiver and a driver serve opposite roles in a differential link, so they are not directly interchangeable in the same socket. |
| Supply voltage (VCC) | 5 V nominal | 3.0 V to 3.6 V | Different supply rails mean the parts cannot share the same power domain without level shifting or regulation. |
| Logic family | RS-422 / RS-423 (5 V) | RS-422 / RS-485 low-voltage (3.3 V) | The logic family determines compatible signaling standards and interfacing requirements with other devices. |
| Number of drivers/receivers | 0 drivers / 4 receivers | 4 drivers / 0 receivers | The driver/receiver count defines the direction of data flow and whether the part can transmit or receive in a bus. |
| Output type | Tri-state differential receiver outputs | Tri-state differential driver outputs | Output type affects bus sharing, enable control, and how the device connects to a differential pair. |
| Input type | Differential line receiver inputs | Single-ended TTL/CMOS logic inputs | Input structure determines what signal source the device expects and whether external termination or conditioning is needed. |
| Package | SOIC-16 (D) | SOIC-16 (D) | Matching package footprints allow board-level drop-in compatibility even when electrical function differs. |
| Operating temperature range | -40°C to +85°C | -40°C to +85°C | The temperature range confirms suitability for industrial environments and must match the application's thermal requirements. |
| Data rate | Up to 10 Mbps | Up to 32 Mbps | Maximum data rate limits the achievable bus speed and must meet the system's throughput requirements. |
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Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AM26LV31EIDR | AM26LS33ACDR |
|---|---|---|
| Part Status | Active | Active |
| Type | Driver | Receiver |
| Protocol | RS422, RS485 | - |
| Number of Drivers/Receivers | 4/0 | 0/4 |
| 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 |
| Receiver Hysteresis | - | 50 mV |
Frequently asked questions
What are the primary functional differences between the AM26LS33ACDR and the AM26LV31EIDR?
The AM26LS33ACDR is a quad differential line receiver designed for RS-422, RS-423, and RS-485 applications, featuring a wide common-mode input range and input hysteresis. The AM26LV31EIDR is a quad differential line driver designed for low-voltage (3.3 V) RS-422 and RS-485 applications, featuring low power consumption and high output drive current. One is a receiver; the other is a driver, so they are not functionally interchangeable.
Are the AM26LS33ACDR and AM26LV31EIDR pin-compatible?
Both devices are offered in a 16-pin SOIC (D) package, but their pin functions differ because one is a receiver and the other is a driver. Pin assignments and signal directions are not equivalent, so they cannot be treated as pin-compatible substitutes in the same socket.
What supply voltage does each device require?
The AM26LS33ACDR operates from a single 5 V supply (nominal 5 V, per the AM26LS33A datasheet). The AM26LV31EIDR operates from a 3.3 V supply (nominal 3.3 V, per the AM26LV31E datasheet). The supply voltages are not interchangeable without level shifting and system-level validation.
Can the AM26LV31EIDR drive a bus that the AM26LS33ACDR receives?
Yes, in principle a driver and receiver pair can form a differential link, but compatibility must be verified against the datasheets: the AM26LV31EIDR is a 3.3 V driver and the AM26LS33ACDR is a 5 V receiver. The receiver's input thresholds, common-mode range, and the driver's output swing must be checked to confirm interoperability in the target system.
What are the signaling standards supported by each part?
The AM26LS33ACDR is specified for RS-422, RS-423, and RS-485 receiver applications. The AM26LV31EIDR is specified for RS-422 and RS-485 driver applications. Neither device alone provides a complete transceiver function; each covers only one direction of the differential interface.
Do these devices differ in operating temperature range?
Both the AM26LS33ACDR and the AM26LV31EIDR are specified for the industrial temperature range of -40°C to 85°C, per their respective manufacturer datasheets. The temperature range is therefore not a differentiator between the two parts.
Which device should be selected for a new 3.3 V RS-485 design?
For a 3.3 V RS-485 design, the AM26LV31EIDR is the appropriate choice as a driver because it is specified for 3.3 V operation. The AM26LS33ACDR is a 5 V receiver and would not be the correct supply-voltage match for a 3.3 V rail. Selection must still be confirmed against the full system requirements and datasheet limits.