Overview
The SN75ALS181NS is a differential driver and receiver integrated circuit designed by Texas Instruments for bidirectional data communication on multipoint bus transmission lines. This component meets the standards of TIA/EIA-422-B, TIA/EIA-485-A, and CCITT recommendations V.11 and X.27. It operates from a single 5V power supply and is characterized for operation from 0°C to 70°C. The SN75ALS181NS combines a 3-state differential line driver and a differential-input line receiver, making it suitable for balanced transmission lines in noisy environments.
Key Specifications
| Parameter | Test Conditions | Min | Max | Unit | |
|---|---|---|---|---|---|
| Supply Voltage | 4.75 | 5 | 5.25 | V | |
| Operating Temperature | 0 | 70 | °C | ||
| Driver Output Current | ±60 | mA | |||
| Driver Common-Mode Output Voltage Range | -7 | 12 | V | ||
| Receiver Common-Mode Input Voltage Range | -12 | 12 | V | ||
| Receiver Input Sensitivity | ±200 | mV | |||
| Receiver Hysteresis | 60 | mV | |||
| Receiver High Input Impedance | 12k | Ω | |||
| Package Type | 14-SOIC |
Key Features
- Meets TIA/EIA-422-B, TIA/EIA-485-A, and CCITT recommendations V.11 and X.27 standards.
- Designed for bidirectional data communication on multipoint bus transmission lines.
- Low supply-current requirement: 30 mA maximum.
- Driver positive-and negative-current limiting.
- Thermal shutdown protection.
- Driver and receiver have active-high and active-low enables.
- Fail-safe design ensures receiver outputs are always high when inputs are open.
- Operates from a single 5V power supply.
Applications
- Motor Drives
- Factory Automation
- Building Automation
- Multipoint bus transmission systems in noisy environments.
Q & A
- What are the primary standards met by the SN75ALS181NS?
The SN75ALS181NS meets TIA/EIA-422-B, TIA/EIA-485-A, and CCITT recommendations V.11 and X.27 standards.
- What is the operating temperature range of the SN75ALS181NS?
The component operates from 0°C to 70°C.
- What is the supply voltage range for the SN75ALS181NS?
The supply voltage range is from 4.75V to 5.25V.
- What is the driver output current capacity of the SN75ALS181NS?
The driver output current capacity is ±60 mA.
- What is the common-mode output voltage range of the driver?
The driver common-mode output voltage range is from -7V to 12V.
- What is the input sensitivity of the receiver?
The receiver input sensitivity is ±200 mV.
- What is the hysteresis of the receiver?
The receiver hysteresis is 60 mV.
- Does the SN75ALS181NS have thermal shutdown protection?
Yes, the component has thermal shutdown protection.
- What type of package does the SN75ALS181NS come in?
The component comes in a 14-SOIC package.
- What are some common applications of the SN75ALS181NS?
Common applications include motor drives, factory automation, and building automation.
