Part A
AM26C32CDR
Texas Instruments
- Lifecycle
- Active
- Stock
- 2477 PCS
- Package
- SOIC-16
- Series
- Interface - Drivers, Receivers, Transceivers
Replacement verdict
Not a drop-in replacement
The AM26C32CDR and AM26C31IDE4 are complementary quad differential bus devices with opposing signal directions: the AM26C32CDR is a quad differential line receiver, while the AM26C31IDE4 is a quad differential line driver. Because their core function, I/O direction, and internal architecture differ fundamentally, neither device can directly substitute for the other in a given circuit location. Designers must treat them as paired transmitter/receiver counterparts rather than interchangeable replacements.
Different device function
Opposite signal direction
Different output type
Different package option
Parts at a glance
Part B
AM26C31IDE4
Texas Instruments
- Lifecycle
- Active
- Stock
- 3690 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 | AM26C32CDR | AM26C31IDE4 | 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 | 0 | 4 | Determines how many differential transmit channels are available; the receiver part has none, so it cannot drive a bus. |
| Number of Receivers | 4 | 0 | Determines how many differential receive channels are available; the driver part has none, so it cannot sense a bus. |
| Output Type | 3-state (tri-state) receiver outputs | 3-state (tri-state) driver outputs | Tri-state capability allows bus sharing; the direction of the tri-state output differs between receiver and driver. |
| Supply Voltage (VCC) | 5 V nominal (4.5 V to 5.5 V) | 5 V nominal (4.5 V to 5.5 V) | Both operate from a 5 V rail, so power-supply compatibility is maintained, though the functional role still differs. |
| Package / Mounting | SOIC-16, surface mount | SOIC-16, surface mount | Identical package and footprint allow board-level interchangeability of the physical part, but not functional substitution. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Matching temperature ratings mean both suit the same industrial environments. |
| Standard Compliance | TIA/EIA-422-B and TIA/EIA-423-B compatible receiver | TIA/EIA-422-B and TIA/EIA-423-B compatible driver | Both meet the same differential interface standards, enabling them to form a matched driver/receiver pair on the same bus. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AM26C32CDR | AM26C31IDE4 |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC,Texas Instruments |
| Part Status | Active | Discontinued at Digi-Key |
| Type | Receiver | Driver |
| Number of Drivers/Receivers | 0/4 | 4/0 |
| Voltage - Supply | 4.5V ~ 5.5V | 4.5V ~ 5.5V |
| Operating Temperature | 0°C ~ 70°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount |
| Protocol | RS422, RS423 | - |
| Receiver Hysteresis | 60 mV | - |
Frequently asked questions
What are the primary functional differences between the AM26C32CDR and the AM26C31IDE4?
The AM26C32CDR is a quad differential line receiver, while the AM26C31IDE4 is a quad differential line driver. The AM26C32CDR accepts differential input signals and converts them to TTL-compatible outputs, whereas the AM26C31IDE4 accepts TTL inputs and generates differential outputs compliant with RS-422 and RS-485 signaling standards.
Are the AM26C32CDR and AM26C31IDE4 pin-compatible and interchangeable?
No. Although both devices are offered in 16-pin packages, they serve complementary functions (receiver versus driver) and have different pin functions and internal architectures. They are not direct substitutes for one another and cannot be interchanged in the same socket without redesigning the circuit function.
What are the package and mounting differences between the AM26C32CDR and AM26C31IDE4?
The AM26C32CDR is supplied in a 16-pin SOIC package with tape-and-reel packaging (the "R" suffix denotes reel). The AM26C31IDE4 is supplied in a 16-pin SOIC package in tube packaging (the "E4" suffix denotes tube). Both are surface-mount SOIC devices, but the packaging format differs for automated assembly versus manual handling.
What supply voltage do the AM26C32CDR and AM26C31IDE4 require?
Both devices operate from a single 5 V supply (nominally 4.5 V to 5.5 V). The AM26C32CDR receiver and AM26C31IDE4 driver are designed for 5 V TTL-compatible systems and are commonly used together in balanced transmission line applications.
Can the AM26C32CDR and AM26C31IDE4 be used together in a communication link?
Yes. The AM26C31IDE4 driver and AM26C32CDR receiver are complementary devices designed to work together in balanced (differential) data transmission systems. The driver converts TTL signals to differential outputs, and the receiver converts the differential signals back to TTL levels, supporting RS-422/RS-485 style links.
What are the signaling standards supported by the AM26C31IDE4 driver?
The AM26C31IDE4 is a quad differential line driver designed to meet the requirements of RS-422 and RS-485 balanced transmission standards. It provides differential outputs with high output impedance in the power-off condition and is suitable for multipoint bus transmission.
What input and output characteristics distinguish the AM26C32CDR receiver?
The AM26C32CDR is a quad differential line receiver with a wide common-mode input range and high input impedance. It features TTL-compatible outputs and is designed to receive balanced differential signals, providing a logic-level output corresponding to the differential input voltage polarity.
Do the AM26C32CDR and AM26C31IDE4 support the same operating temperature range?
Both devices are specified for the commercial temperature range of 0°C to 70°C. Designers should verify the exact temperature grade from the manufacturer datasheet for the specific orderable part number, as suffix codes can indicate different grades.