Overview
The AM26LS31CNSR, produced by Texas Instruments, is a quadruple complementary-output 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 unidirectional data communication on balanced transmission lines such as twisted-pair or parallel-wire transmission lines. It operates from a single 5V power supply and features low-power Schottky circuitry, which reduces power consumption without compromising speed.
Key Specifications
| Parameter | Test Conditions | Min | Max | Unit | |
|---|---|---|---|---|---|
| Propagation Delay Time (Low to High) | CL = 30 pF, S1 and S2 open | 14 | 20 | 20 | ns |
| Propagation Delay Time (High to Low) | CL = 30 pF, S1 and S2 open | 14 | 20 | 20 | ns |
| Output Enable Time to High Level | CL = 30 pF, RL = 75 Ω | 25 | 40 | 40 | ns |
| Output Enable Time to Low Level | RL = 180 Ω | 37 | 45 | 45 | ns |
| Output Disable Time from High Level | CL = 10 pF, S1 and S2 closed | 21 | 30 | 30 | ns |
| Output Disable Time from Low Level | 23 | 35 | 35 | ns | |
| Output-to-Output Skew | CL = 30 pF, S1 and S2 open | 1 | 6 | 6 | ns |
| Supply Current (VCC = MAX, all outputs disabled) | 32 | 80 | 80 | mA | |
| Input Current at Maximum Input Voltage | VCC = MAX, VI = 7 V | 0.1 | mA | ||
| High-Level Input Current | VCC = MAX, VI = 2.7 V | 20 | μA | ||
| Low-Level Input Current | VCC = MAX, VI = 0.4 V | -0.36 | mA | ||
| Short-Circuit Output Current | 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.
- High output impedance in power-off conditions.
- Complementary output-enable inputs (active-high or active-low enable).
- Available MIL-PRF-38535-qualified options.
- Low-power Schottky circuitry for reduced power consumption without sacrificing speed.
- High-current capability for driving balanced lines (±30 mA of sink or source current).
- Positive- and negative-current limiting for protection from line fault conditions.
Applications
- Motor encoders.
- Field transmitters: pressure sensors and temperature sensors.
- Military and avionics imaging.
- Temperature sensors or controllers using Modbus.
Q & A
- What are the primary standards that the AM26LS31CNSR complies with?
The AM26LS31CNSR complies with ANSI TIA/EIA-422-B and ITU Recommendation V.11.
- What is the operating voltage of the AM26LS31CNSR?
The device operates from a single 5V power supply.
- What type of inputs does the AM26LS31CNSR have?
The device has TTL-Compatible inputs.
- What is the significance of the complementary output-enable inputs?
The complementary output-enable inputs allow for either active-high or active-low enable control, providing flexibility in device control.
- How does the device handle power-off conditions?
In power-off conditions, the outputs are set to a high impedance state.
- What is the current handling capability of the AM26LS31CNSR?
The device can handle loads of a minimum of ±30 mA of sink or source current.
- What kind of protection does the device offer against line faults?
The device features positive- and negative-current limiting for protection from line fault conditions.
- What are some common applications of the AM26LS31CNSR?
Common applications include motor encoders, field transmitters, military and avionics imaging, and temperature sensors or controllers using Modbus.
- Are there any military-grade options available for the AM26LS31CNSR?
Yes, there are available MIL-PRF-38535-qualified options for the AM26LS31CNSR.
- How does the low-power Schottky circuitry benefit the device?
The low-power Schottky circuitry reduces power consumption without sacrificing speed.
