Part A
AM26C32IDR
STマイクロエレクトロニクス
- Lifecycle
- Active
- Stock
- 6435 個数
- Package
- SOIC-16
- Series
- インターフェース - ドライバ、レシーバ、トランシーバ
Replacement verdict
Not a drop-in replacement
The AM26C32IDR and AM26C31CDRG4 are complementary quad differential bus transceiver devices rather than interchangeable parts: the AM26C32IDR is a quad differential line receiver, while the AM26C31CDRG4 is a quad differential line driver. Their signal direction, I/O architecture, and functional role in a bus system differ fundamentally, so neither device can directly substitute for the other in an existing design without reworking the circuit topology.
Different device function
Different signal direction
Different I/O architecture
Different bus role
Parts at a glance
Part B
AM26C31CDRG4
STマイクロエレクトロニクス
- Lifecycle
- Active
- Stock
- 7066 個数
- Package
- SOIC-16
- Series
- インターフェース - ドライバ、レシーバ、トランシーバ
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AM26C32IDR | AM26C31CDRG4 | 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 | The driver count determines how many differential output channels are available to transmit signals onto a bus. |
| Number of Receivers | 4 | 0 | The receiver count determines how many differential input channels can be sensed from a bus. |
| Output Type | 3-state (tri-state) receiver outputs | 3-state (tri-state) differential driver outputs | Tri-state capability allows outputs to be disabled and shared on a common bus without contention. |
| Supply Voltage (VCC) | 5 V nominal | 5 V nominal | Both operate from a 5 V supply, so power rail compatibility is maintained between the two parts. |
| Package / Mounting | 16-SOIC, surface mount | 16-SOIC, surface mount | Matching package and footprint simplifies board layout and physical substitution considerations. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | Identical temperature ratings ensure both parts suit the same industrial-grade 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 compliant driver/receiver pair. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AM26C32IDR | AM26C31CDRG4 |
|---|---|---|
| Supplier | - | 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 | -40°C ~ 85°C | 0°C ~ 70°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 AM26C32IDR and the AM26C31CDRG4?
The AM26C32IDR is a quad differential line receiver, while the AM26C31CDRG4 is a quad differential line driver. The AM26C32IDR is designed to receive balanced differential signals compliant with TIA/EIA-422-B and ITU Recommendation V.11, whereas the AM26C31CDRG4 is designed to transmit balanced differential signals meeting the same standards. They serve complementary roles in a differential communication link and are not interchangeable.
Are the AM26C32IDR and AM26C31CDRG4 pin-compatible?
Both devices are offered in a 16-pin SOIC package (D suffix) with the same pin count and package outline. However, the pin functions differ: the AM26C32IDR receiver includes a receive enable and a high-impedance output control, while the AM26C31CDRG4 driver includes a driver enable and complementary outputs. Because the internal pin assignments and functions are not identical, they cannot be substituted for one another on the same PCB footprint without design changes.
Can the AM26C32IDR and AM26C31CDRG4 be used together in the same differential link?
Yes. The AM26C31CDRG4 driver and AM26C32IDR receiver are designed to interoperate over a balanced differential bus compliant with TIA/EIA-422-B and ITU V.11. A typical configuration uses the AM26C31CDRG4 at the transmitting end and the AM26C32IDR at the receiving end, with proper termination and common-mode considerations applied per the respective datasheets.
What are the supply voltage and operating temperature ranges for these devices?
Both the AM26C32IDR and AM26C31CDRG4 operate from a single 5 V supply (nominal). The AM26C32IDR is specified over the industrial temperature range of -40°C to 85°C. The AM26C31CDRG4 is specified over the commercial temperature range of 0°C to 70°C. Designers should verify the exact temperature grade against the specific datasheet revision before use in their application.
What are the key electrical characteristics of the AM26C31CDRG4 driver?
The AM26C31CDRG4 is a quad differential line driver featuring three-state outputs, a wide common-mode output voltage range, and output short-circuit protection. It is designed to drive balanced lines with low output skew and is compliant with TIA/EIA-422-B and ITU V.11. It includes an enable function that places outputs in a high-impedance state for bus sharing. Exact parametric limits should be taken from the manufacturer datasheet.
What are the key electrical characteristics of the AM26C32IDR receiver?
The AM26C32IDR is a quad differential line receiver with a wide common-mode input voltage range, high input impedance, and hysteresis for noise immunity. It features three-state outputs and is compliant with TIA/EIA-422-B and ITU V.11. It includes a receive enable and a high-impedance control for bus architectures. Exact parametric limits should be taken from the manufacturer datasheet.
Do these devices support three-state (high-impedance) bus operation?
Yes. Both the AM26C32IDR receiver and the AM26C31CDRG4 driver provide three-state output capability. The AM26C31CDRG4 driver can place its outputs in a high-impedance state via its enable input, allowing multiple drivers to share a bus. The AM26C32IDR receiver similarly provides a high-impedance output state when disabled, facilitating bus multiplexing. Refer to the respective datasheets for enable logic and timing.
What package and ordering information should be considered when selecting between these parts?
Both devices are available in a 16-pin SOIC (D) package, with the AM26C32IDR and AM26C31CDRG4 suffixes indicating tape-and-reel packaging. The "G4" suffix on the AM26C31CDRG4 denotes a green (RoHS-compliant) molding compound option per the manufacturer's nomenclature. Designers should confirm the exact package, temperature grade, and RoHS status against the current manufacturer datasheet and distributor listing before ordering.