Overview
The AM26LS31CDR, produced by Texas Instruments, is a quadruple differential line driver designed to meet the requirements of ANSI TIA/EIA-422-B and ITU Recommendation V.11. This device is part of the AM26LS31 family and is optimized for driving balanced transmission lines such as twisted-pair or parallel-wire lines. It operates from a single 5V power supply and features TTL-compatible inputs, making it suitable for a variety of applications requiring reliable and high-speed data transmission.
Key Specifications
| Parameter | Condition | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Supply Voltage (VCC) | 4.75 | 5 | 5.25 | V | |
| Propagation Delay Time (tPLH) | CL = 30 pF, S1 and S2 open | 14 | 20 | ns | |
| Propagation Delay Time (tPHL) | CL = 30 pF, S1 and S2 open | 14 | 20 | ns | |
| Output Enable Time to High Level (tPZH) | CL = 30 pF, RL = 75 Ω | 25 | 40 | ns | |
| Output Disable Time from High Level (tPHZ) | CL = 10 pF, S1 and S2 closed | 45 | ns | ||
| Supply Current (ICC) | VCC = MAX, all outputs disabled | 32 | 80 | mA | |
| High-Level Input Current (IIH) | VCC = MAX, VI = 2.7 V | 20 | μA | ||
| Low-Level Input Current (IIL) | VCC = MAX, VI = 0.4 V | -0.36 | mA | ||
| Short-Circuit Output Current (IOS) | VCC = MAX | -30 | -150 | mA |
Key Features
- Meets or exceeds the requirements of ANSI TIA/EIA-422-B and ITU Recommendation V.11.
- Operates from a single 5V power supply.
- TTL-compatible inputs.
- Complementary outputs with high-current capability for driving balanced lines.
- High output impedance in power-off conditions.
- Complementary output-enable inputs (active-high and active-low).
- Positive- and negative-current limiting for protection from line fault conditions.
- Available in various packages including SOIC, SSOP, PDIP, and others.
- MIL-PRF-38535-qualified options available for military applications.
Applications
- Motor encoders.
- Field transmitters: pressure sensors and temperature sensors.
- Military and avionics imaging.
- Temperature sensors or controllers using Modbus.
- Chemical and gas sensors.
- Military: radars and sonars.
- Motor control: brushless DC and brushed DC motors.
Q & A
- What are the primary standards that the AM26LS31CDR complies with?
The AM26LS31CDR complies with ANSI TIA/EIA-422-B and ITU Recommendation V.11.
- What is the operating voltage range of the AM26LS31CDR?
The device operates from a single 5V power supply, with a range of 4.75V to 5.25V.
- What type of inputs does the AM26LS31CDR have?
The device has TTL-compatible inputs.
- How are the outputs of the AM26LS31CDR configured?
The outputs are complementary and have high-current capability for driving balanced lines.
- What is the state of the outputs in power-off conditions?
The outputs are in a high-impedance state in power-off conditions.
- How can the transmitter outputs be controlled?
The transmitter outputs can be controlled using active-high and active-low enable inputs (G and G).
- What protection features does the AM26LS31CDR have?
The device features positive- and negative-current limiting for protection from line fault conditions.
- In what packages is the AM26LS31CDR available?
The device is available in various packages including SOIC, SSOP, PDIP, and others.
- Are there any military-qualified options available for the AM26LS31CDR?
Yes, MIL-PRF-38535-qualified options are available for military applications.
- What are some common applications of the AM26LS31CDR?
Common applications include motor encoders, field transmitters, military and avionics imaging, and temperature sensors or controllers using Modbus.
