The document describes the features and characteristics of the ST3243 device, including a supply current of 1µA, a minimum guaranteed data rate of 250kbps, a guaranteed slew rate range of 6V/µs, and suitability for mouse driveability.
The ST3243 is an RS-232 transceiver designed to operate from a 3.0V to 5.5V supply voltage, achieving a minimum guaranteed data rate of 250kbps and a slew rate range of 6V/µs. The device integrates three drivers, five receivers, and a dual charge-pump circuit to meet EIA/TIA-232 specifications without requiring external capacitors for basic operation.
A key feature is the auto-powerdown function, which reduces supply current to 1mA when no valid RS-232 signal is detected on the receiver inputs. The device includes a dedicated wake-up receiver (R2) that remains active even in power-down modes to detect incoming signals. It is available in SO-28, SSOP-28, and TSSOP28 packages.
| Supply Voltage Range | 3.0V to 5.5V |
|---|---|
| Maximum Data Rate | 400 Kbps |
| Minimum Guaranteed Data Rate | 250kbps |
| Supply Current (Auto-powerdown) | 1mA |
| Slew Rate Range | 6V/µs |
| Number of Drivers and Receivers | 3 drivers, 5 receivers |
The device operates with a supply voltage ranging from 3.0V to 5.5V.
Receiver R2 is always active to implement a wake-up feature for the serial port.