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 and RS-485, as well as ITU Recommendation V.11. This device is optimized for balanced multipoint bus transmission at rates of up to 20 Mbaud, making it 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.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| VCC Supply Voltage | -0.3 | 7 | V | |
| Input Voltage (VI) | -0.3 | 7 | V | |
| Output Voltage Range (VO) | -9 | 14 | V | |
| Storage Temperature Range (Tstg) | -65 | 150 | °C | |
| Lead Temperature (TLEAD) | 260 | °C | ||
| Output Enable Time to High Level (tPZH) | 30 | 45 | 70 | ns |
| Output Enable Time to Low Level (tPZL) | 25 | 40 | 65 | ns |
| Output Disable Time from High Level (tPHZ) | 10 | 20 | 35 | ns |
| Output Disable Time from Low Level (tPLZ) | 10 | 30 | 45 | ns |
Key Features
- Meets or exceeds ANSI standards EIA/TIA-422-B and 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.
- Suitable 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 at approximately 150°C junction temperature.
- Positive and negative current limiting.
- Logically interchangeable with SN75172.
Applications
- Motor drives.
- Factory automation and control.
Q & A
- What are the key standards that the SN75ALS172A complies with?
The SN75ALS172A meets or exceeds ANSI standards EIA/TIA-422-B and RS-485, as well as ITU Recommendation V.11.
- What is the maximum data rate supported by the SN75ALS172A?
The device is optimized for balanced multipoint bus transmission at rates of up to 20 Mbaud.
- What are the operating temperature ranges for the SN75ALS172A?
The device is characterized for operation from 0°C to 70°C.
- What kind of protection does the SN75ALS172A offer against line-fault conditions?
The device provides thermal shutdown protection at approximately 150°C junction temperature and positive and negative current limiting.
- What are the typical applications of the SN75ALS172A?
The device is commonly used in motor drives and factory automation and control systems.
- What is the maximum supply voltage for the SN75ALS172A?
The maximum supply voltage (VCC) is 7 V.
- What is the maximum output voltage range for the SN75ALS172A?
The output voltage range (VO) is -9 V to 14 V.
- How many drivers does the SN75ALS172A contain?
The device comprises four differential line drivers.
- What are the package options available for the SN75ALS172A?
The device is available in SOIC (DW) and PDIP (N) packages.
- Is the SN75ALS172ADWR still in production?
The SN75ALS172ADWR is scheduled for obsolescence and will be discontinued by the manufacturer, but it is still available in some inventory.
