Overview
The SN75172DWRE4, produced by Texas Instruments, is a monolithic 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 up to 4 megabaud, making it suitable for party-line applications in noisy environments. It features 3-state outputs, wide common-mode output voltage ranges, and protection mechanisms such as thermal shutdown and current limiting. The SN75172 operates from a single 5V supply and is characterized for operation from 0°C to 70°C.
Key Specifications
| Parameter | Min | Nom | 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 |
| Common-Mode Output Voltage, VOC | -7 | - | 12 | V |
| High-Level Output Current, IOH | - | - | -60 | mA |
| Low-Level Output Current, IOL | - | - | 60 | mA |
| Operating Free-Air Temperature, TA | 0 | - | 70 | °C |
| Storage Temperature Range, Tstg | -65 | - | 150 | °C |
| Lead Temperature (1.6 mm from case), TLEAD | - | - | 260 | °C |
Key Features
- Meets or exceeds ANSI standards EIA/TIA-422-B and RS-485, and ITU Recommendation V.11.
- Designed for multipoint transmission on long bus lines in noisy environments.
- 3-state outputs.
- Common-mode output voltage range of –7V to 12V.
- Active-high and active-low enables.
- Thermal shutdown protection.
- Positive- and negative-current limiting.
- Operates from a single 5V supply.
- Logically interchangeable with AM26LS31.
Applications
- Chemical and gas sensors.
- Field transmitters: temperature sensors and pressure sensors.
- Motor drives: brushless DC and brushed DC.
- Temperature sensors and controllers using Modbus.
Q & A
- What are the primary standards that the SN75172 complies with?
The SN75172 meets or exceeds the requirements of ANSI standards EIA/TIA-422-B and RS-485, as well as ITU Recommendation V.11.
- What is the typical operating temperature range for the SN75172?
The device is characterized for operation from 0°C to 70°C.
- What is the common-mode output voltage range of the SN75172?
The common-mode output voltage range is –7V to 12V.
- Does the SN75172 have thermal protection?
- What type of current limiting does the SN75172 have?
The device has both positive- and negative-current limiting.
- Can the SN75172 operate from a single supply voltage?
- What are some common applications of the SN75172?
- Is the SN75172 logically interchangeable with other devices?
- What types of packages are available for the SN75172?
The SN75172 is available in PDIP (16 pins) and SOIC (20 pins) packages.
- How does the SN75172 handle 3-state outputs?
