Part A
AM26LV32EIDR
德州儀器
- Lifecycle
- Active
- Stock
- 2110 件
- Package
- SOIC-16
- Series
- 介面-驅動器、接收器、收發器
Replacement verdict
Not a drop-in replacement
The AM26LV32EIDR and AM26LS31CDRE4 are not functionally interchangeable: one is a low-voltage quad differential line receiver and the other is a 5 V quad differential line driver, so their signal direction, supply domain, and output characteristics differ fundamentally. Direct substitution is not recommended without a full interface redesign.
Different signal direction
Different supply voltage domain
Different output type
Different logic family
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 | AM26LV32EIDR | AM26LS31CDRE4 | 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 for the same node in a circuit. |
| Signal direction | Receives differential inputs, outputs single-ended | Accepts single-ended inputs, drives differential outputs | Direction determines whether the device can be placed 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 supply rails mean the parts cannot share the same power domain without level shifting or regulation. |
| Logic family / standard | Low-voltage RS-422/RS-485 receiver (3.3 V) | RS-422/RS-423 line driver (5 V) | Compatibility with the bus standard and logic levels affects interoperability with other transceivers on the network. |
| Number of drivers/receivers | 0 drivers / 4 receivers | 4 drivers / 0 receivers | The channel count and mix define how many bus lines can be driven or sensed by a single package. |
| Output type | 3-state single-ended outputs | 3-state differential outputs | Output topology determines the signaling scheme and whether the device can drive a twisted-pair differential bus. |
| Enable / control | Active-high receiver enable | Active-high driver enable | Enable polarity and function affect bus arbitration and how the device is gated in a shared-bus system. |
| Package | 16-pin SOIC (D) | 16-pin SOIC (D) | Matching footprints allow board-level interchangeability, though electrical role differences still prevent direct substitution. |
| Operating temperature range | -40 °C to +85 °C | 0 °C to +70 °C | The wider industrial range of the receiver suits harsher environments, while the driver is limited to commercial temperatures. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AM26LV32EIDR | 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 | 35 mV | - |
Frequently asked questions
What are the primary functional differences between the AM26LV32EIDR and AM26LS31CDRE4?
The AM26LV32EIDR is a quad differential line receiver designed for low-voltage (3.3 V) RS-422/RS-485 applications, while the AM26LS31CDRE4 is a quad differential line driver designed for 5 V RS-422/RS-423 systems. One is a receiver and the other is a driver, so they serve complementary but non-interchangeable roles in a differential signal chain.
Can the AM26LV32EIDR and AM26LS31CDRE4 be used together in the same system?
Yes. Because the AM26LS31CDRE4 is a differential driver and the AM26LV32EIDR is a differential receiver, they can form a compatible driver/receiver pair on a differential bus, provided the bus voltage levels and supply rails are validated against both datasheets for the specific application.
What supply voltage does each device require?
The AM26LV32EIDR operates from a 3.3 V nominal supply, while the AM26LS31CDRE4 operates from a 5 V nominal supply. Designs mixing the two must account for the different supply rails and any level-shifting or interface considerations between them.
Do both parts come in the same package type?
Both devices are offered in SOIC-16 packages, but the specific package suffix and ordering code differ (the AM26LV32EIDR uses the D package suffix and the AM26LS31CDRE4 uses the DRE4 ordering suffix). Always confirm the exact package drawing and pinout from the respective manufacturer datasheet before layout or substitution.
Are the AM26LV32EIDR and AM26LS31CDRE4 drop-in replacements for each other?
No. They are functionally different devices (receiver versus driver) with different supply voltages, so they cannot be substituted for one another. A direct replacement would require a part of the same function, voltage class, and pinout.
What are typical applications for each device?
The AM26LV32EIDR is typically used as a low-voltage differential receiver in RS-422/RS-485 communication interfaces, while the AM26LS31CDRE4 is typically used as a differential line driver in RS-422/RS-423 transmission systems such as industrial control and data transmission links.
Do both devices support differential signaling standards?
Yes. Both are designed for differential signaling: the AM26LV32EIDR targets RS-422/RS-485 receive functions, and the AM26LS31CDRE4 targets RS-422/RS-423 transmit functions. The applicable standard and operating conditions should be verified in each manufacturer datasheet.