Overview
The AM26LS31CDBRE4, 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 specifically packaged in a 16-pin SSOP (Shrink Small Outline Package). It operates from a single 5V power supply and features low-power Schottky circuitry, which reduces power consumption without compromising speed. The device is optimized for unidirectional data communication on balanced transmission lines, such as twisted-pair or parallel-wire lines, and includes high-current capability and high output impedance in power-off conditions.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage (VCC) | 4.75 to 5.25 (C-suffix), 4.5 to 5.5 (M-suffix) | V |
| Operating Temperature Range | 0 to 70 | °C |
| Propagation Delay Time (tPLH, tPHL) | 14 to 20 (typical), 30 (maximum for M-suffix) | ns |
| Output Enable Time to High Level (tPZH) | 25 to 40 (typical), 60 (maximum for M-suffix) | ns |
| Output Disable Time from High Level (tPHZ) | 21 to 30 (typical), 45 (maximum for M-suffix) | ns |
| Output-to-Output Skew (tSKEW) | 1 to 6 | ns |
| Supply Current (ICC) with all outputs disabled | 32 to 80 | mA |
| Short-Circuit Output Current (IOS) | -30 to -150 | mA |
| Package Type | SSOP (16 pins) | |
| Package Size | 6.2mm × 5.3mm |
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 for differential signaling.
- 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 to reduce 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 is the primary function of the AM26LS31CDBRE4?
The AM26LS31CDBRE4 is a quadruple complementary-output line driver designed for unidirectional data communication on balanced transmission lines.
- What are the operating voltage and temperature ranges for the AM26LS31CDBRE4?
The device operates from a single 5V power supply, with a voltage range of 4.75 to 5.25V for C-suffix and 4.5 to 5.5V for M-suffix devices. The operating temperature range is 0 to 70°C.
- What types of transmission lines is the AM26LS31CDBRE4 designed for?
The device is designed for balanced transmission lines such as twisted-pair or parallel-wire lines.
- What is the significance of the complementary output-enable inputs?
The complementary output-enable inputs allow for precise control of the transmitter outputs using either active-high or active-low enable signals.
- How does the device handle power-off conditions?
In power-off conditions, the outputs are set to a high impedance state.
- What are the key specifications for propagation delay and output enable times?
The propagation delay times (tPLH, tPHL) are typically 14 to 20 ns, and the output enable times (tPZH, tPZL) range from 25 to 40 ns for typical values.
- What is the maximum short-circuit output current?
The maximum short-circuit output current (IOS) is -30 to -150 mA.
- What package type and size does the AM26LS31CDBRE4 come in?
The device is packaged in a 16-pin SSOP with dimensions of 6.2mm × 5.3mm.
- What are some common applications for the AM26LS31CDBRE4?
Common applications include motor encoders, field transmitters, military and avionics imaging, and temperature sensors or controllers using Modbus.
- Does the AM26LS31CDBRE4 have any military-grade qualifications?
Yes, the device is available with MIL-PRF-38535-qualified options (M), where all parameters are tested unless otherwise noted.
