Overview
The ST232BWR is a multi-channel RS-232 driver and receiver device produced by STMicroelectronics. It is designed to operate with a single 5 V power supply, making it particularly suitable for applications where ±12 V is not available. This device follows the EIA/TIA-232 and V.28 communication standards and is compatible with MAX232 and MAX202. The ST232BWR features two drivers and two receivers, making it versatile for various communication needs.
Key Specifications
| Parameter | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|
| Supply Voltage Range | 4.5 | 5 | 5.5 | V |
| Supply Current (No Load) | 5 | 10 | mA | |
| Transmitter Output Voltage Swing | ±5 | ±7.8 | V | |
| Receiver Input Voltage Range | ±30 | V | ||
| Data Rate | 120 | 220 | kbps | |
| Operating Temperature Range | -40 | 85 | °C | |
| Transmitter Output Resistance | 300 | Ω | ||
| Receiver Input Resistance | 3 | 5 | 7 | kΩ |
| Receiver Propagation Delay | 0.3 | 1 | μs |
Key Features
- Single 5 V power supply operation.
- Two drivers and two receivers.
- Controlled output slew rate to reduce electromagnetic interference (EMI).
- Compatible with MAX232 and MAX202.
- Requires only four external capacitors (0.1 µF each).
- Operating temperature range: -40 °C to 85 °C.
- Low power consumption: typical supply current of 5 mA (no load).
Applications
- Portable computers.
- Low power modems.
- Interface translation.
- Battery-powered RS-232 systems.
- Multi-drop RS-232 networks.
Q & A
- What is the operating voltage range of the ST232BWR?
The ST232BWR operates within a supply voltage range of 4.5 V to 5.5 V.
- How many drivers and receivers does the ST232BWR have?
The ST232BWR features two drivers and two receivers.
- What is the typical data rate of the ST232BWR?
The typical data rate of the ST232BWR is 220 kbps.
- What is the operating temperature range of the ST232BWR?
The operating temperature range of the ST232BWR is -40 °C to 85 °C.
- How many external capacitors are required for the ST232BWR?
The ST232BWR requires four external capacitors, each of 0.1 µF.
- Is the ST232BWR compatible with other RS-232 devices?
Yes, the ST232BWR is compatible with MAX232 and MAX202.
- What is the typical supply current of the ST232BWR?
The typical supply current of the ST232BWR is 5 mA (no load).
- What are some common applications of the ST232BWR?
Common applications include portable computers, low power modems, interface translation, battery-powered RS-232 systems, and multi-drop RS-232 networks.
- What is the receiver input voltage range of the ST232BWR?
The receiver input voltage range of the ST232BWR is ±30 V.
- What is the transmitter output voltage swing of the ST232BWR?
The transmitter output voltage swing of the ST232BWR is typically ±7.8 V.
