Overview
The SN75ALS172A, produced by Texas Instruments, is a quadruple differential line driver designed to meet the requirements of ANSI Standards EIA/TIA-422-B, RS-485, and ITU Recommendation V.11. This device is optimized for balanced multipoint bus transmission at rates of up to 20 Mbaud and is suitable for party-line applications in noisy environments. It features high-speed advanced low-power Schottky circuitry and is characterized for operation from 0°C to 70°C. The SN75ALS172A provides thermal shutdown protection and current limiting, making it robust against line-fault conditions.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage (VCC) | 4.75 - 5.25 | V |
| Operating Temperature Range (TA) | 0 - 70 | °C |
| High-Level Input Voltage (VIH) | 2 | V |
| Low-Level Input Voltage (VIL) | 0.8 | V |
| Common-Mode Output Voltage (VOC) | -7 to 12 | V |
| High-Level Output Current (IOH) | -60 | mA |
| Low-Level Output Current (IOL) | 60 | mA |
| Driver Output Capacity | ±60 | mA |
| Thermal Shutdown Temperature | Approximately 150 | °C |
| Package Type | SOIC (DW), PDIP (N) | |
| Package Size (SOIC DW) | 12.8mm × 10.3mm | |
| Package Size (PDIP N) | 19.3mm × 9.4mm |
Key Features
- Meets or exceeds ANSI standards EIA/TIA-422-B, RS-485, and ITU Recommendation V.11.
- High-speed advanced low-power Schottky circuitry.
- Designed for 20 Mbaud operation in both serial and parallel applications.
- Designed for multipoint transmission on long bus lines in noisy environments.
- Low supply-current requirements: 55 mA max.
- Wide positive and negative input/output bus-voltage ranges.
- Driver output capacity: ±60 mA.
- Thermal shutdown protection.
- Driver positive and negative current limiting.
- Logically interchangeable with SN75172.
Applications
- Motor drives.
- Factory automation and control.
- Multipoint bus transmission systems.
- Party-line applications in noisy environments.
Q & A
- What are the key standards that the SN75ALS172A complies with?
The SN75ALS172A meets or exceeds ANSI standards EIA/TIA-422-B, RS-485, and ITU Recommendation V.11.
- What is the maximum operating temperature range for the SN75ALS172A?
The device is characterized for operation from 0°C to 70°C.
- What is the maximum supply current requirement for the SN75ALS172A?
The maximum supply current requirement is 55 mA.
- What is the driver output capacity of the SN75ALS172A?
The driver output capacity is ±60 mA.
- Does the SN75ALS172A have thermal shutdown protection?
- Is the SN75ALS172A logically interchangeable with other devices?
- What types of packages are available for the SN75ALS172A?
The device is available in SOIC (DW) and PDIP (N) packages.
- What are the typical applications of the SN75ALS172A?
The device is typically used in motor drives, factory automation and control, and multipoint bus transmission systems.
- What is the significance of the high-speed advanced low-power Schottky circuitry in the SN75ALS172A?
The high-speed advanced low-power Schottky circuitry allows for efficient and high-speed operation while minimizing power consumption.
- Can the SN75ALS172A operate in noisy environments?
