Part A
AM26LV32IDR
德州儀器
- Lifecycle
- Active
- Stock
- 7519 件
- Package
- SOIC-16
- Series
- 介面-驅動器、接收器、收發器
Replacement verdict
Not a drop-in replacement
The AM26LV32IDR and AM26LS31CDRE4 are not functionally interchangeable: the AM26LV32IDR is a low-voltage quad differential line receiver, while the AM26LS31CDRE4 is a quad differential line driver. Their signal direction, supply voltage range, and output characteristics differ fundamentally, so substituting one for the other is not feasible without redesigning the interface.
Different signal direction
Different supply voltage range
Different output type
Different input threshold
Parts at a glance
Part B
AM26LS31CDRE4
德州儀器
- Lifecycle
- Active
- Stock
- 2303 件
- Package
- SOIC-16
- Series
- 介面-驅動器、接收器、收發器
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AM26LV32IDR | 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. |
| Number of Drivers/Receivers | 0 drivers / 4 receivers | 4 drivers / 0 receivers | Determines the direction of signal flow and whether the device can source a bus or only listen to it. |
| Supply Voltage (Vcc) | 3.0 V to 3.6 V | 4.75 V to 5.25 V | Different logic supply rails mean the parts cannot share the same power domain without level shifting. |
| Output/Input Logic Level | 3.3 V TTL-compatible outputs | 5 V TTL-compatible inputs | Logic thresholds must match the surrounding controller; a 5 V driver input is not directly compatible with 3.3 V logic without care. |
| Data Rate | Up to 32 Mbps | Up to 10 Mbps | Maximum signaling rate limits the achievable bus bandwidth and must meet the system's timing requirements. |
| Output Type | 3-state differential receiver output | 3-state differential driver output | Three-state capability enables bus sharing, but the electrical nature (receiver vs driver) differs fundamentally. |
| Operating Temperature Range | -40 °C to +85 °C | 0 °C to +70 °C | Industrial vs commercial temperature grades affect suitability for harsh or outdoor environments. |
| Package / Mounting | SOIC-16, surface mount | SOIC-16, surface mount | Same footprint allows board-level drop-in placement, though electrical role still differs. |
| Standard Compliance | TIA/EIA-422-B and TIA/EIA-485-A receiver | TIA/EIA-422-B and TIA/EIA-423-B driver | Compliance standards define the electrical signaling environment each part is designed to operate within. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AM26LV32IDR | 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 | -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 AM26LV32IDR and the AM26LS31CDRE4?
The AM26LV32IDR is a low-voltage quad differential line receiver designed for 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 signal, and the AM26LV32IDR receives it.
Can the AM26LV32IDR and AM26LS31CDRE4 be used together in the same system?
Yes. The AM26LS31CDRE4 driver and AM26LV32IDR receiver are commonly paired in differential data transmission links. The receiver's input sensitivity and common-mode range are compatible with the differential output levels produced by the driver, enabling reliable communication over twisted-pair or parallel cables.
Are the AM26LV32IDR and AM26LS31CDRE4 pin-compatible?
No. The AM26LV32IDR is a receiver and the AM26LS31CDRE4 is a driver, so their pin functions differ. Both are offered in 16-pin SOIC packages, but the internal signal paths and pin assignments are not interchangeable. They cannot be substituted for one another on the same PCB footprint.
What supply voltage does each device require?
The AM26LV32IDR operates from a single 3.3 V supply (typically 3.0 V to 3.6 V). The AM26LS31CDRE4 operates from a single 5 V supply (typically 4.75 V to 5.25 V). Level compatibility between the two must be considered when interfacing them in a mixed-voltage system.
What are the key signaling standards supported by each device?
The AM26LV32IDR is designed to meet the requirements of TIA/EIA-422-B and TIA/EIA-485-A for balanced differential receivers. The AM26LS31CDRE4 is designed to meet the requirements of TIA/EIA-422-B for balanced differential drivers. Both are suitable for RS-422 and RS-485 style differential links when used in their respective driver/receiver roles.
What are the package and operating temperature specifications for these devices?
Both the AM26LV32IDR and AM26LS31CDRE4 are supplied in 16-pin SOIC (D) packages and are specified for the industrial temperature range of -40°C to +85°C. The "IDR" and "CDRE4" suffixes denote tape-and-reel packaging and industrial-grade qualification.
How do the output/input characteristics differ between the driver and receiver?
The AM26LS31CDRE4 driver provides differential outputs with high drive current suitable for terminating balanced lines, and includes output enable control. The AM26LV32IDR receiver provides differential inputs with high input impedance and a wide common-mode range, and includes a receiver enable function. These characteristics are complementary and are specified in the respective manufacturer datasheets.
Which device should be selected for a new 3.3 V differential link design?
For a 3.3 V differential link, the AM26LV32IDR is the appropriate receiver choice. A compatible 3.3 V driver should be selected for the transmit side, since the AM26LS31CDRE4 is a 5 V device. Designers should verify supply and level compatibility against the manufacturer datasheets before finalizing the bill of materials.