Part A
AM26LV32EIDR
Texas Instruments
- Lifecycle
- Active
- Stock
- 2110 PCS
- Package
- SOIC-16
- Series
- Interfaces - pilotes, récepteurs, émetteurs - récepteurs
Replacement verdict
Not a drop-in replacement
The AM26LV32EIDR and AM26LS31CDG4 are not functionally interchangeable: the AM26LV32EIDR is a low-voltage quad differential line receiver, while the AM26LS31CDG4 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 a redesign of the interface.
Different signal direction
Different supply voltage range
Different output type
Different package footprint
Parts at a glance
Part B
AM26LS31CDG4
Texas Instruments
- Lifecycle
- Active
- Stock
- 8504 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 | AM26LV32EIDR | AM26LS31CDG4 | Why it matters |
|---|---|---|---|
| Function | Quadruple differential line receiver | Quadruple differential line driver | A receiver and a driver serve opposite roles in a differential link; they are not direct substitutes in the same circuit position. |
| Signal direction | Receives differential inputs, outputs single-ended | Accepts single-ended inputs, drives differential outputs | Determines whether the device can be used at the receiving or transmitting end of a bus. |
| 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. |
| Logic family / standard | Low-voltage RS-422/RS-485 receiver (LV) | RS-422/RS-423 line driver (5 V) | Compatibility with the bus standard and signaling levels affects interoperability with other nodes. |
| Number of drivers/receivers | 0 drivers / 4 receivers | 4 drivers / 0 receivers | Channel count and type must match the number of lines being driven or received in the design. |
| Output type | 3-state single-ended outputs | Differential (complementary) outputs | Output structure dictates the interface topology and whether a differential pair is generated or consumed. |
| Enable / control | Active-high and active-low receiver enables | Active-high driver enable | Enable polarity and availability affect bus arbitration and tri-state control logic. |
| Package | SOIC-16 (D) | SOIC-16 (D) | Identical package footprint allows board-level interchangeability even though electrical roles differ. |
| Operating temperature range | -40 °C to +85 °C | 0 °C to +70 °C | Industrial vs commercial temperature ratings affect suitability for harsh or outdoor environments. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AM26LV32EIDR | AM26LS31CDG4 |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC,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 | 35 mV | - |
Frequently asked questions
What are the primary functional differences between the AM26LV32EIDR and the AM26LS31CDG4?
The AM26LV32EIDR is a quad differential line receiver designed for low-voltage (3.3 V) operation, while the AM26LS31CDG4 is a quad differential line driver designed for 5 V operation. They perform complementary functions (receiving vs. driving) and are not direct substitutes for one another.
Are the AM26LV32EIDR and AM26LS31CDG4 pin-to-pin compatible?
No. Although both are offered in 16-pin SOIC packages, the AM26LV32EIDR is a receiver with a receiver-enable pin structure, and the AM26LS31CDG4 is a driver with a driver-enable pin structure. Pin functions differ, so they cannot be interchanged on the same PCB footprint without design changes.
What supply voltage does each device require?
The AM26LV32EIDR operates from a single 3.3 V supply (typically 3.0 V to 3.6 V). The AM26LS31CDG4 operates from a single 5 V supply (typically 4.75 V to 5.25 V).
Do these devices support the same signaling standards?
The AM26LV32EIDR is a low-voltage differential signaling receiver intended for RS-422/RS-485-type differential inputs at 3.3 V logic levels. The AM26LS31CDG4 is a 5 V differential line driver compliant with RS-422 and RS-423 driver requirements. They are used on opposite ends of a differential link and are not interchangeable as transceivers.
Can the AM26LV32EIDR and AM26LS31CDG4 be used together in a system?
Yes, in principle a 5 V AM26LS31CDG4 driver can transmit differential signals to a 3.3 V AM26LV32EIDR receiver, provided the receiver's input common-mode and differential input voltage ratings are respected per the respective datasheets. Level compatibility of the logic interface must be verified for the specific system.
What are the package and operating temperature specifications?
Both devices are offered in 16-pin SOIC (D) packages. The AM26LV32EIDR is specified for the industrial temperature range of -40 °C to 85 °C. The AM26LS31CDG4 is specified for operation from 0 °C to 70 °C. Verify exact suffix-specific ratings in the manufacturer datasheets.
Which device should be selected for a new 3.3 V differential interface design?
For a 3.3 V differential receive path, the AM26LV32EIDR is the appropriate choice because it is specified for 3.3 V operation. The AM26LS31CDG4 is a 5 V driver and would require a 5 V rail and level shifting on its logic inputs, so it is not the preferred choice for a 3.3 V-only design.