Overview
The AM26LS31CDB, produced by Texas Instruments, is a quadruple complementary-output line driver designed to meet the requirements of ANSI TIA/EIA-422-B and ITU (formerly CCITT) 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 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 | Typ | Max | Unit |
|---|---|---|---|---|---|
| VCC | Supply Voltage | 4.75 (C-suffix), 4.5 (M-suffix) | 5 | 5.25 (C-suffix), 5.5 (M-suffix) | V |
| ICC | Supply Current | 32 | - | 80 | mA |
| tPLH | Propagation Delay Time, Low- to High-Level Output | 14 | 20 | - | ns |
| tPHL | Propagation Delay Time, High- to Low-Level Output | 14 | 20 | - | ns |
| tPZH | Output Enable Time to High Level | 25 | 40 | - | ns |
| IOZ | Off-State (High-Impedance-State) Output Current | -20 | - | 20 | μA |
| IOS | Short-Circuit Output Current | -30 | - | -150 | mA |
Key Features
- Meets or exceeds the requirements of ANSI TIA/EIA-422-B and ITU (formerly CCITT) 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 (M): All parameters are tested unless otherwise noted.
- Low-power Schottky circuitry for reduced power consumption without sacrificing speed.
- 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 AM26LS31CDB complies with?
The AM26LS31CDB meets or exceeds the requirements of ANSI TIA/EIA-422-B and ITU (formerly CCITT) Recommendation V.11.
- What is the operating voltage range for the AM26LS31CDB?
The device operates from a single 5V power supply, with a voltage range of 4.75V to 5.25V for C-suffix devices and 4.5V to 5.5V for M-suffix devices.
- What type of inputs does the AM26LS31CDB have?
The device has TTL-Compatible inputs.
- How are the outputs of the AM26LS31CDB configured?
The device has complementary outputs and high output impedance in power-off conditions.
- What is the function of the G and G inputs on the AM26LS31CDB?
The G and G inputs are used to control the transmitter outputs, offering active-high or active-low enable options.
- What kind of current limiting does the AM26LS31CDB feature?
The device features positive- and negative-current limiting for protection from line fault conditions.
- What are some common applications of the AM26LS31CDB?
Common applications include motor encoders, field transmitters, military and avionics imaging, and temperature sensors or controllers using Modbus.
- Is the AM26LS31CDB available in MIL-PRF-38535-qualified options?
Yes, the AM26LS31CDB is available in MIL-PRF-38535-qualified options (M), where all parameters are tested unless otherwise noted.
- What is the typical propagation delay time for the AM26LS31CDB?
The typical propagation delay time (tPLH and tPHL) is 20 ns.
- How does the AM26LS31CDB manage power consumption?
The device uses low-power Schottky circuitry to reduce power consumption without sacrificing speed.
