Overview
The SN75189NS is a monolithic low-power Schottky quadruple line receiver designed by Texas Instruments. It is intended to meet the requirements of the standard interface between data-terminal equipment and data-communication equipment as defined by TIA/EIA-232-F. This device operates from a single 5-V supply and is fully interchangeable with Motorola's MC1489 and MC1489A. The SN75189NS is characterized for operation from 0°C to 70°C, making it suitable for a variety of applications in data communication systems.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | SO (NS) | - |
| Pins | 14 | - |
| Operating Temperature Range | 0 to 70 | °C |
| Supply Voltage (VCC) | 4.5 to 5.5 | V |
| Input Voltage (VI) | ±30 | V |
| Input Resistance | 3 k to 7 k | Ω |
| High-Level Output Current (IOH) | -0.5 | mA |
| Low-Level Output Current (IOL) | -10 | mA |
| Propagation Delay Time (tPLH, tPHL) | 25 to 85 ns | ns |
| Transition Time (tTLH, tTHL) | 10 to 175 ns | ns |
Key Features
- Operates from a single 5-V supply.
- Built-in input hysteresis (double thresholds) for noise rejection.
- Response control terminal for each receiver to adjust input threshold levels and provide input noise filtering.
- Meets or exceeds the requirements of TIA/EIA-232-F and ITU Recommendation V.28.
- Fully interchangeable with Motorola MC1489 and MC1489A.
- Low-power Schottky technology for reduced power consumption.
Applications
The SN75189NS is primarily used in data communication systems, particularly in the interface between data-terminal equipment and data-communication equipment. It is suitable for applications involving RS-232 interfaces, such as in modems, serial ports, and other communication devices. Additionally, it can be used in peripheral devices like UARTs, ACEs, or microprocessors where reliable and noise-resistant signal reception is crucial.
Q & A
- What is the operating temperature range of the SN75189NS?
The SN75189NS operates from 0°C to 70°C. - What is the supply voltage range for the SN75189NS?
The supply voltage range is from 4.5 V to 5.5 V. - What is the input voltage range for the SN75189NS?
The input voltage range is ±30 V. - Does the SN75189NS have built-in noise filtering?
Yes, it has built-in input hysteresis and provision for external noise filtering using a capacitor connected to the response-control terminal. - Is the SN75189NS compatible with other similar devices?
Yes, it is fully interchangeable with Motorola's MC1489 and MC1489A. - What is the typical propagation delay time of the SN75189NS?
The typical propagation delay time is 25 to 85 ns. - What is the purpose of the response-control terminal in the SN75189NS?
The response-control terminal allows for adjustment of the overall input threshold levels and provides input noise filtering. - Can the SN75189NS be used in military applications?
No, the SN75189NS is characterized for operation from 0°C to 70°C, which is not suitable for the full military temperature range. - What type of technology is used in the SN75189NS?
The SN75189NS uses low-power Schottky technology. - What are some common applications of the SN75189NS?
Common applications include RS-232 interfaces in modems, serial ports, and other communication devices, as well as in peripheral devices like UARTs and microprocessors.
