Part A
AM26LV32CDR
Texas Instruments
- Lifecycle
- Active
- Stock
- 3036 PCS
- Package
- SOIC-16
- Series
- Interfaces - pilotes, récepteurs, émetteurs - récepteurs
Replacement verdict
Not a drop-in replacement
The AM26LV32CDR and AM26LS31CDRE4 are not functionally interchangeable: the AM26LV32CDR is a low-voltage quad differential line receiver, while the AM26LS31CDRE4 is a quad differential line driver. Their signal direction, output structure, and electrical characteristics differ fundamentally, so substituting one for the other is not feasible without redesigning the interface.
Different device function
Different output type
Different supply voltage
Different signal direction
Parts at a glance
Part B
AM26LS31CDRE4
Texas Instruments
- Lifecycle
- Active
- Stock
- 2303 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 | AM26LV32CDR | AM26LS31CDRE4 | Why it matters |
|---|---|---|---|
| Function | Quadruple differential line receiver | Quadruple differential line driver | Receiver vs. driver roles are not interchangeable; a receiver cannot transmit and a driver cannot receive, so they serve opposite ends of a differential link. |
| Signal direction | Receives differential inputs, outputs single-ended TTL/CMOS | Accepts single-ended TTL/CMOS inputs, outputs differential | Direction determines whether the device can be used at the receiving or transmitting side of a bus, directly affecting substitutability. |
| Output type | 3-state single-ended outputs | 3-state differential outputs | Differential versus single-ended outputs dictate the transmission medium, noise immunity, and whether the part can drive a twisted-pair bus. |
| 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 supply rails mean the parts cannot share the same power domain, preventing direct drop-in substitution. |
| Standard compliance | TIA/EIA-422-B and TIA/EIA-485 (RS-422/RS-485 receiver) | TIA/EIA-422-B and TIA/EIA-423-B (RS-422 driver) | Compliance standards define the electrical interface and interoperability; mismatched standards affect compatibility with the rest of the bus. |
| Number of drivers/receivers | 4 receivers, 0 drivers | 4 drivers, 0 receivers | The channel count and direction mix must match the system architecture; swapping them changes the number of transmit and receive channels available. |
| Input hysteresis | Typical 50 mV hysteresis on differential inputs | Not applicable (driver has no differential input hysteresis) | Hysteresis improves noise immunity on receivers; its absence on a driver reflects the fundamentally different signal path of each device. |
| Package | 16-pin SOIC (D) | 16-pin SOIC (D) | Identical package and pin count allow the same PCB footprint, but pin functions differ, so the board cannot simply accept either part. |
| Operating temperature range | -40°C to +85°C | 0°C to +70°C | The wider industrial range of the receiver versus the commercial range of the driver affects suitability for harsh or outdoor environments. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AM26LV32CDR | AM26LS31CDRE4 |
|---|---|---|
| Supplier | - | Texas Instruments |
| Part Status | Active | Discontinued at Digi-Key |
| Type | Receiver | Driver |
| Protocol | RS422, RS485 | RS422, RS485 |
| Number of Drivers/Receivers | 0/4 | 4/0 |
| Voltage - Supply | 3V ~ 3.6V | 4.75V ~ 5.25V |
| Operating Temperature | 0°C ~ 70°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 AM26LV32CDR and AM26LS31CDRE4?
The AM26LV32CDR is a quad differential line receiver designed for low-voltage (3.3 V) operation, while the AM26LS31CDRE4 is a quad differential line driver designed for 5 V operation. They serve complementary roles in a differential transmission system: the AM26LS31CDRE4 drives the differential signal, and the AM26LV32CDR receives it.
Can the AM26LV32CDR and AM26LS31CDRE4 be used together in the same system?
Yes. The AM26LS31CDRE4 driver (5 V) and AM26LV32CDR receiver (3.3 V) are commonly paired in mixed-supply differential systems, provided the receiver input thresholds and the driver output levels are verified against the datasheets for the specific application. The AM26LV32CDR is designed to accept differential inputs compatible with such driver outputs.
What are the supply voltage requirements for each device?
The AM26LV32CDR operates from a nominal 3.3 V supply (VCC), while the AM26LS31CDRE4 operates from a nominal 5 V supply. Each device's datasheet specifies the recommended operating supply voltage range, which must be observed for reliable operation.
Do both parts come in the same package type?
Both the AM26LV32CDR and AM26LS31CDRE4 are offered in SOIC-16 packages. The "D" suffix in both part numbers denotes the SOIC package, and the "R" suffix indicates tape-and-reel packaging. Pin functions differ because one is a receiver and the other is a driver, so they are not pin-for-pin interchangeable.
Are the AM26LV32CDR and AM26LS31CDRE4 drop-in replacements for each other?
No. The AM26LV32CDR is a receiver and the AM26LS31CDRE4 is a driver; they perform opposite functions and have different pin assignments and supply voltages. They cannot be substituted for one another in a given socket.
What signaling standards are these devices associated with?
The AM26LS31CDRE4 is a quad differential line driver historically associated with RS-422/RS-423-type balanced transmission, and the AM26LV32CDR is a quad differential line receiver suited to receiving balanced differential signals. Designers should confirm compliance with the specific standard required by their system against the manufacturer datasheets.
What does the "E4" suffix on AM26LS31CDRE4 indicate?
The "E4" suffix is a manufacturer packaging/ordering designation (typically indicating lead-free/RoHS-compliant tape-and-reel SOIC packaging). It does not change the electrical function of the device. Confirm the exact suffix meaning in the manufacturer's ordering information.