Part A
AM26LS32ACDR
Texas Instruments
- Lifecycle
- Active
- Stock
- 2449 PCS
- Package
- SOIC-16
- Series
- Interface - Drivers, Receivers, Transceivers
Replacement verdict
Not a drop-in replacement
The AM26LV31CDR and AM26LS32ACDR are not functionally interchangeable: the AM26LV31CDR 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
AM26LV31CDR
Texas Instruments
- Lifecycle
- Active
- Stock
- 7383 PCS
- Package
- SOIC-16
- Series
- Interface - Drivers, Receivers, 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 | AM26LV31CDR | 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 direct substitutes for the same socket function. |
| Signal direction | Transmit (driver outputs) | Receive (receiver inputs) | Determines whether the device sources data onto the bus or senses data from the bus, which dictates its placement in a system. |
| Supply voltage (VCC) | 3.0 V to 3.6 V (3.3 V nominal) | 4.75 V to 5.25 V (5 V nominal) | Different logic supply rails mean the two parts cannot share the same power domain without level shifting. |
| Output/input type | Three-state differential outputs | Differential inputs with three-state outputs | The driver provides tri-state differential outputs for bus sharing, while the receiver accepts differential inputs and presents tri-state single-ended outputs. |
| Number of drivers/receivers | 4 drivers | 4 receivers | Channel count and direction define how many differential lines each device can drive or sense in a multi-line interface. |
| Standard compliance | TIA/EIA-422-B and ITU V.11 compatible (low-voltage) | TIA/EIA-422-B, TIA/EIA-423-B, and ITU V.10/V.11 compatible | Standards compliance affects interoperability with other balanced/unbalanced differential equipment on the same network. |
| Input/output voltage levels | Low-voltage differential outputs (3.3 V logic) | 5 V differential input thresholds with ±7 V common-mode range | Mismatched signaling levels can prevent reliable detection or cause overstress when the parts are interconnected. |
| Package | SOIC-16 (D) | SOIC-16 (D) | Identical package and pin count allow board-level footprint compatibility, though electrical function still differs. |
| Operating temperature range | -40°C to +85°C | -40°C to +85°C | Matching temperature ratings confirm both parts suit the same industrial ambient conditions. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AM26LS32ACDR | AM26LV31CDR |
|---|---|---|
| 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 | 0°C ~ 70°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the primary functional differences between the AM26LV31CDR and AM26LS32ACDR?
The AM26LV31CDR is a quad differential line driver designed for low-voltage (3.3 V) operation, while the AM26LS32ACDR is a quad differential line receiver designed for 5 V operation. They serve complementary roles in balanced transmission systems rather than being interchangeable.
Are the AM26LV31CDR and AM26LS32ACDR pin-compatible?
Both devices are offered in the same 16-pin SOIC (D) package with the same pin count, but their pin functions differ because one is a driver and the other is a receiver. Pin-for-pin substitution is not valid without verifying the signal direction and function of each pin against the respective datasheets.
What supply voltage does each device require?
The AM26LV31CDR operates from a single 3.3 V nominal supply (typically 3.0 V to 3.6 V), whereas the AM26LS32ACDR operates from a 5 V nominal supply (typically 4.75 V to 5.25 V). The supply rails are not directly compatible.
Can the AM26LV31CDR and AM26LS32ACDR be used together in the same link?
Yes. In a typical balanced transmission link, the AM26LV31CDR driver transmits differential signals over a twisted-pair cable and the AM26LS32ACDR receiver at the far end recovers the signal. This driver/receiver pairing is a common configuration, provided the interface levels and termination are validated for the specific system.
What output and input logic levels do these devices support?
The AM26LV31CDR driver accepts TTL-compatible inputs and provides differential outputs, while the AM26LS32ACDR receiver accepts differential inputs and provides TTL-compatible outputs. Designers should confirm exact VIL/VIH and VOL/VOH limits from the manufacturer datasheets for the chosen supply voltage.
Do both devices support the same data rates and signaling standards?
Both are intended for balanced differential data transmission, but their specified maximum data rates and compliance with standards such as RS-422 or RS-485 must be confirmed individually from the manufacturer datasheets. The driver and receiver are characterized separately, so rate and standard claims should not be assumed to be identical.
What are the operating temperature ranges for these parts?
The AM26LV31CDR and AM26LS32ACDR are both specified for the commercial temperature range of 0°C to 70°C. Industrial or extended-temperature variants, if required, must be selected from the manufacturer's ordering information rather than assumed for these specific part numbers.
Can the AM26LS32ACDR be substituted for the AM26LV31CDR in an existing design?
No. The AM26LS32ACDR is a receiver and the AM26LV31CDR is a driver, so they perform opposite functions and cannot be substituted for one another. Any replacement must match the device function, supply voltage, package, and signal levels verified against the manufacturer datasheet.