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- Part Number SN75189NSR
- Manufacturer Texas Instruments
- Pin Count 14
- Part Category Integrated Circuit
- Package Category Small Outline Packages
- Footprint Name Small Outline Packages - NS (R-PDSO-G14)
- Released Date May 5, 2021
- Last Modified Date Mar 7, 2023 4:10 PM UTC
- Pinout / Pin List Click Here (Member Only)
SN75189NSR Details
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Manufacturer Part Number:
SN75189NSR
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Brand Name:
Texas Instruments
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Pbfree Code:
Yes
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Rohs Code:
Yes
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Part Life Cycle Code:
Active
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Part Package Code:
SOIC
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Pin Count:
14
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Country Of Origin:
Malaysia
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ECCN Code:
EAR99
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HTS Code:
8542.39.00.90
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Manufacturer:
Texas Instruments
SN75189NSR Frequently Asked Questions (FAQs)
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The maximum cable length depends on the baud rate and the type of cable used. As a general rule, the maximum cable length is around 1000 feet (305 meters) at a baud rate of 9600 bps, and it decreases as the baud rate increases. It's recommended to consult the RS-485 standard and perform signal integrity analysis to determine the maximum cable length for a specific application.
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To prevent signal reflections, it's recommended to use a termination resistor at each end of the RS-485 bus. The value of the termination resistor should be equal to the characteristic impedance of the cable, which is typically around 120 ohms for a standard RS-485 cable. Additionally, it's recommended to use a biasing network to maintain a stable common-mode voltage on the bus.
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Yes, the SN75189NSR can be used in a multi-point configuration, where multiple devices are connected to the same RS-485 bus. However, it's recommended to use a repeater or a hub to ensure that the signal is amplified and re-transmitted to each device on the bus. Additionally, it's important to ensure that each device on the bus is properly terminated and biased to prevent signal reflections and common-mode voltage shifts.
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The maximum number of devices that can be connected to the RS-485 bus depends on the specific application and the type of devices being used. In general, the RS-485 standard recommends a maximum of 32 devices on a single bus. However, this number can be increased by using repeaters or hubs to extend the bus and reduce the signal attenuation.
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Hot-swapping of devices on the RS-485 bus can be challenging, as it can cause signal reflections and common-mode voltage shifts. To handle hot-swapping, it's recommended to use a bus repeater or hub that can detect and recover from bus faults. Additionally, it's important to ensure that each device on the bus is properly terminated and biased to prevent signal reflections and common-mode voltage shifts.
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SN75189NSR Overview
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About Texas Instruments
Texas Instruments (TI) designs and manufactures semiconductors and integrated circuits for a wide range of applications. The company's product portfolio includes analog chips, which are essential for managing power and signal functions in electronic devices, and embedded processors, which serve as the brains in various systems, enabling functionality in everything from industrial equipment to consumer electronics. TI's innovations in semiconductor technology have made it a leader in the industry.