• Product Introduction

TRS3223E 

3V to 5.5V multichannel RS-232 line driver/receiver with +/-15kV IEC ESD protection

characteristic   ESD-protected RS-232 bus pins ± 15 kV Human Whole Body Model (HBM) ± 8 kV complies with IEC61000 - 4 - 2 contact discharge ± 15 kV complies with IEC61000 - 4 - 2 air gap discharge Meets or exceeds the requirements of TIA/EIA-232-F and ITU Section 28 V operation, 3 to 5.5 Weiwei Consumer Council supply Available at speeds up to 500 kbits/s Two drives and two receivers Low standby current. 1μA typical External capacitance. 4 × 0.1 μF Accepts a 5-V 3.3 V supply voltage logic input Replace high-speed PIN-compatible devices (1 megabit/s) TRSF3223E apply Battery-powered system handheld computer laptop laptop handheld computer Handheld device Instructions/ Ordering information The TRS3223E consists of two line drivers, a two-wire receiver, and a dual charge pump with ± 15-kV ESD protection PIN-to-PIN (Serial Port Connection Pin, Including Ground) circuitry. The device meets the requirements of TIA/EIA-232-F and provides an electrical interface between the asynchronous communication controller and the serial port connector. The charge pump and four small external capacitors allow for operation from a single 3-V to a 5.5 V supply. The device operates at typical data signal transmission rates up to 500 kbit/s and a 30-V/μs driver output slew rate is the highest. When flexible control options for power management, the serial port is invalid. When the automatic power saving function function, FORCEON is low and FORCEOFF is high. In this mode of operation, if the device does not give a valid RS-232 signal, the driver output is disabled. If the FORCEOFF setting is low and EN is high, the two drivers and receiver are turned off and the supply current is reduced to 1 milliamper. Disconnecting or closing the peripheral drive of the serial port causes automatic power loss to occur. FORCEON and FORCEOFF can be disabled when the automatic power off is high. With automatic power saving function, the device is an effective start-up when automatically adapted to any signal receiver input. An invalid output is used to notify the user if an RS-232 signal appears on any receiver input. Invalid High (valid data) if any receiver input voltage is greater than 2.7 V or less than -2.7 volts, or has been with -0.3 V or 0.3 V microseconds less than 30. Invalid is low (invalid data) if the receiver input voltage is between -0.3 V or 0.3 V more than 30. Refer to Figure 4 Receiver Input Levels.