Overview
The SN75172 is a monolithic quadruple differential line driver produced by Texas Instruments. It is designed to meet or exceed 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 and is particularly suited for party-line applications in noisy environments. The SN75172 features 3-state outputs, wide common-mode output voltage ranges, and includes protection mechanisms such as thermal shutdown and current limiting.
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 (TLEAD) | - | - | 260 | °C |
Key Features
- Meets or exceeds the requirements of 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 maximum data transmission rate of the SN75172?
The device is optimized for balanced multipoint bus transmission at rates up to 4 megabaud.
- What are the common-mode output voltage ranges of the SN75172?
The common-mode output voltage range is from –7V to 12V.
- Does the SN75172 have built-in protection mechanisms?
Yes, it includes thermal shutdown protection and positive- and negative-current limiting.
- What is the operating temperature range of the SN75172?
The device is characterized for operation from 0°C to 70°C.
- Can the SN75172 be used in noisy environments?
Yes, it is designed for multipoint transmission on long bus lines in noisy environments.
- What types of packages are available for the SN75172?
The SN75172 is available in PDIP (16 pins) and SOIC (20 pins) packages.
- Is the SN75172 compatible with other Texas Instruments devices?
Yes, it offers optimum performance when used with the SN75173 or SN75175 quadruple differential line receivers.
- What is the supply voltage requirement for the SN75172?
The device operates from a single 5V supply.
- Does the SN75172 have 3-state outputs?
Yes, the SN75172 features 3-state outputs.
