ST232AB/AC is a very high-speed, ultra-low power consumption 5V powered RS-232 drivers and receivers. Its features include a supply voltage range of 4.5 to 5.5V, no-load supply current of 1.5mA, transmitter output voltage swing of ±9V, transition slew rate of 12V/μs, receiver propagation delay of 0.1μs, receiver input voltage range of ±30V, and data rate of 400kbps/s.
The document describes the ST232AB and ST232AC, which are dual driver and dual receiver devices compliant with EIA/TIA-232 and V.28 standards. These components operate on a single 5V power supply and require only four external capacitors (0.1 µF), making them suitable for portable computers, low-power modems, and battery-powered networks where +12V is unavailable.
The datasheet provides detailed information including pin configurations, absolute maximum ratings, electrical characteristics for both transmitter and receiver functions, typical application circuits, performance graphs regarding temperature and supply voltage, package mechanical data, and a revision history.
| Supply voltage range | 4.5 to 5.5 V |
|---|---|
| Supply current no load (typ) | 1.5 mA |
| Transmitter output voltage swing (typ) | +9 V |
| Transition slew rate (typ) | 12 V/us |
| Receiver propagation delay (typ) | 0.1 us |
| Data rate (typ) | 400 kbps/s |
| Operating temperature range | -40 to 85°C / 0 to 70°C |
| Number of drivers and receivers | 2 driver, 2 receiver |
These devices use a single 5 V power supply.
Only four external capacitors (0.1 µF) are needed.
They follow the EIA/TIA-232 and V.28 communication standard.