Overview
The SN75ALS191 is a dual, high-speed, differential line driver designed by Texas Instruments to meet the requirements of ANSI Standard EIA/TIA-422-B and ITU Recommendation V.11. This device is optimized for high-speed data transmission and operates from a single 5V power supply. It is available in eight-pin packages, including the SOIC (D) package. The SN75ALS191 is characterized for operation over a temperature range of 0°C to 70°C, making it suitable for a variety of industrial and communication applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage (VCC) | 4.75 | 5 | 5.25 | V |
| High Level Input Voltage (VIH) | 2 | V | ||
| Low Level Input Voltage (VIL) | 0.8 | V | ||
| High Level Output Current (IOH) | -20 | mA | ||
| Low Level Output Current (IOL) | 20 | mA | ||
| Operating Temperature Range (TA) | 0 | 70 | °C | |
| Propagation Delay Time (tPLH, tPHL) | 6, 9 | 13, 14 | ns |
Key Features
- Meets or exceeds the requirements of ANSI Standard EIA/TIA-422-B and ITU Recommendation V.11.
- Designed to operate at 20 Mbaud or higher.
- TTL- and CMOS-input compatibility.
- Single 5V supply operation.
- Output short-circuit protection.
- Improved replacement for the µA9638.
- Schottky-diode-clamped transistors minimize propagation delay time.
Applications
The SN75ALS191 is suitable for various applications requiring high-speed differential data transmission, such as:
- Industrial automation.
- Point-of-sale terminals and cash counters.
- Smart grid systems.
- AC and servo motor drives.
Q & A
- What is the operating temperature range of the SN75ALS191?
The SN75ALS191 operates from 0°C to 70°C.
- What is the supply voltage for the SN75ALS191?
The supply voltage is 5V, with a range of 4.75V to 5.25V.
- Is the SN75ALS191 compatible with TTL and CMOS inputs?
- What is the maximum data rate for the SN75ALS191?
The SN75ALS191 is designed to operate at data rates of 20 Mbaud or higher.
- Does the SN75ALS191 have output short-circuit protection?
- What are the package options for the SN75ALS191?
The SN75ALS191 is available in an eight-pin SOIC (D) package.
- What standards does the SN75ALS191 comply with?
The SN75ALS191 meets or exceeds the requirements of ANSI Standard EIA/TIA-422-B and ITU Recommendation V.11.
- What is the propagation delay time for the SN75ALS191?
The propagation delay time is typically 13 ns for low-to-high-level output and 14 ns for high-to-low-level output.
- Is the SN75ALS191 an improved replacement for any other component?
- What type of transistors are used in the SN75ALS191 to minimize propagation delay time?
Schottky-diode-clamped transistors are used to minimize propagation delay time.
