Overview
The SN75LP1185DWR, produced by Texas Instruments, is a low-power bipolar device designed for multiple RS-232 driver and receiver applications. It features three drivers and five receivers, making it a versatile component for serial communication systems. The device is characterized by its flow-through pinout, which matches the industry-standard SN75185 and SN75C185, facilitating easy interconnection with UART and serial-port connectors. It operates within a temperature range of 0°C to 70°C and is known for its rugged, low-cost solution with 15 kV of ESD protection on the bus pins.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Number of Drivers | 3 | |
| Number of Receivers | 5 | |
| Operating Temperature Range | 0°C to 70°C | |
| Supply Voltage Range (VCC) | –0.5 V to 7 V | V |
| Supply Voltage Range (VDD) | –0.5 V to 15 V | V |
| Supply Voltage Range (VSS) | 0.5 V to –15 V | V |
| Data Rate | Up to 256 kbit/s | |
| ESD Protection | 15 kV | |
| Output Slew Rate | Up to 30 V/µs | V/µs |
| Output Voltage Swing | Nominally clamped at ±6 V | V |
| Package Options | SOIC (DW), SSOP (DB), DIP (N) |
Key Features
- Low-power bipolar device with three drivers and five receivers.
- Flow-through pinout compatible with industry-standard SN75185 and SN75C185.
- 15 kV of ESD protection on bus pins.
- Internal slew-rate control to limit output signal rate of change to 30 V/µs.
- Output voltage swing nominally clamped at ±6 V to support higher data rates and reduce EMI emissions.
- Compliance with TIA/EIA-232-F and ITU V.28 standards.
- Ability to handle input signals of 3.3 V or 5 V.
Applications
The SN75LP1185DWR is suitable for various serial communication applications, including:
- Serial-port connectors in IBM PC/AT and compatible systems.
- Data interchange between host computers and peripherals.
- Industrial automation and control systems.
- Telecommunication equipment.
- Any application requiring multiple RS-232 drivers and receivers with low power consumption and high ESD protection.
Q & A
- What is the operating temperature range of the SN75LP1185DWR?
The operating temperature range is from 0°C to 70°C. - How many drivers and receivers does the SN75LP1185DWR have?
The device has three drivers and five receivers. - What is the maximum data rate supported by the SN75LP1185DWR?
The device supports data rates up to 256 kbit/s. - What is the level of ESD protection provided by the SN75LP1185DWR?
The device offers 15 kV of ESD protection on the bus pins. - What are the package options available for the SN75LP1185DWR?
The device is available in SOIC (DW), SSOP (DB), and DIP (N) packages. - Is the SN75LP1185DWR compliant with any industry standards?
Yes, it complies with TIA/EIA-232-F and ITU V.28 standards. - What is the output voltage swing of the SN75LP1185DWR?
The output voltage swing is nominally clamped at ±6 V. - Can the SN75LP1185DWR handle 3.3 V or 5 V input signals?
Yes, it can handle both 3.3 V and 5 V input signals. - What is the purpose of the internal slew-rate control in the SN75LP1185DWR?
The internal slew-rate control limits the rate of change in the output signal to 30 V/µs to support higher data rates and reduce EMI emissions. - How does the SN75LP1185DWR protect against power-off fault conditions?
Diodes placed in series with the VDD and VSS leads protect the device in fault conditions when the device outputs are shorted to ±15 V and the power supplies are at low voltage.
