Overview
The AM26C31CDRE4 is a quadruple differential line driver produced by Texas Instruments. This device is designed to meet the requirements of TIA/EIA-422-B and ITU (formerly CCITT) standards, making it suitable for communication over relatively long wires in noisy environments. The AM26C31 features complementary outputs with high-current capability, enabling it to drive balanced lines such as twisted-pair or parallel-wire transmission lines. It also provides a high-impedance state in power-off conditions, which is crucial for maintaining signal integrity. The device operates using BiCMOS circuitry, which reduces power consumption without compromising speed.
Key Specifications
| Parameter | Value |
|---|---|
| Number of Drivers/Receivers | 4/0 |
| Protocol | RS422, RS485 |
| Supply Voltage | 4.5 V to 5.5 V |
| Operating Temperature | 0°C to 70°C (AM26C31C), -40°C to +85°C (AM26C31I), -40°C to +125°C (AM26C31Q), -55°C to +125°C (AM26C31M) |
| Package/Case | 16-SOIC (0.154", 3.90mm Width) |
| Mounting Type | Surface Mount |
| Propagation Delay (tPLH, tPHL) | 7 ns Typical |
| Pulse Distortion (tsk(p)) | 0.5 ns Typical |
| Power Consumption (ICC) | 100 µA Typical |
Key Features
- High output impedance in power-off conditions
- Controlled baseline and improved replacement for AM26LS31
- Extended temperature performance: -55°C to 125°C for military-grade versions
- Low power consumption: ICC = 100 µA typical
- High speed: tPLH = tPHL = 7 ns typical
- Low pulse distortion: tsk(p) = 0.5 ns typical
- BiCMOS circuitry for reduced power consumption without sacrificing speed
- Common enable functions with active-high or active-low options
- Qualification to automotive and military standards (e.g., MIL-PRF-38535)
Applications
- Chemical and gas sensors
- Field transmitters: temperature sensors and pressure sensors
- Military: radars and sonars
- Motor control: brushless DC and brushed DC motors
- Military and avionics imaging
- Temperature sensors and controllers using Modbus
Q & A
- What is the primary function of the AM26C31CDRE4? The AM26C31CDRE4 is a quadruple differential line driver designed to meet the requirements of TIA/EIA-422-B and ITU (formerly CCITT) standards.
- What are the operating temperature ranges for different versions of the AM26C31? The operating temperatures range from 0°C to 70°C (AM26C31C), -40°C to +85°C (AM26C31I), -40°C to +125°C (AM26C31Q), and -55°C to +125°C (AM26C31M).
- What is the typical power consumption of the AM26C31? The typical power consumption is 100 µA.
- What is the propagation delay of the AM26C31? The propagation delay (tPLH, tPHL) is 7 ns typical.
- Does the AM26C31 support high-impedance state in power-off conditions? Yes, it provides a high-impedance state in power-off conditions.
- What protocols does the AM26C31 support? The AM26C31 supports RS422 and RS485 protocols.
- What is the package type of the AM26C31CDRE4? The package type is 16-SOIC (0.154", 3.90mm Width).
- Is the AM26C31 qualified for automotive and military applications? Yes, it is qualified to automotive and military standards, including MIL-PRF-38535.
- What are some common applications of the AM26C31? Common applications include chemical and gas sensors, field transmitters, military radars and sonars, motor control, and avionics imaging.
- Does the AM26C31 have low pulse distortion? Yes, it has low pulse distortion with tsk(p) = 0.5 ns typical.
