|Category||Interface and Interconnect => RS-232 (EIA-232)|
|Description||RS-232 Interface ICs
± 15 kV ESD protected 2.3 to 5.5 V, 400 kbps, RS-232 transceiver with auto-power-down
|Company||ST Microelectronics, Inc.|
|Datasheet||Download STLV3243EB datasheet
ESD protection for RS-232 I/O pins: 8 kV IEC 1000-4-2 contact discharge 15 kV human body model 1 mA supply current achieved when in autopower-down 250 kbps minimum guaranteed data rate Guaranteed 6 V/ms slew rate range Guaranteed mouse drive ability 0.1 µF external capacitors Meet EIA/TIA-562 specifications Available in Flip-Chip28 package auto-power-down enabled, the device is automatically activated when a valid signal is applied to any receiver input. Typical applications are notebooks, PDAs, smartphones, hand-held equipment, palmtop computers, peripherals, battery-powered equipment, and printers.Description
The STLV3243EB device consists of 3 drivers, 5 receivers and a dual charge-pump circuit. All transmitter outputs and receiver inputs are protected ±8 kV USING IEC 1000-4-2 contact discharge and ±15 kV using the human body model. The receiver R2 is always active to implement a wake-up feature for serial port. The device is guaranteed to run at data rates of 250 kbps while maintaining RS-562 output levels. The auto-power-down feature operates when FORCEON is low and FORCEOFF is high. During this operation mode, if the device does not sense a valid RS-562 signal, the driver outputs are disabled. If FORCEOFF is set low, both drivers and receivers (expert R2B) are shut off, and supply current is reduced to 1 µA. Disconnecting the serial port or turning off the peripheral drives causes the auto-power-down condition to occur. Auto-power-down can be disabled when FORCEON and FORCEOFF are high, and this should be done when driving a serial mouse. With Table 1. Device summary
Pin configuration. 3 Maximum ratings. 5 Electrical characteristics. 6 Application circuit. 9 Timing diagrams. 10 Package mechanical data. 12 Revision history. 15
Symbol C1+ V+ VCC FORCEON R1OUT R3OUT Name and function Second receiver input voltage Third receiver input voltage Fourth receiver input voltage Fifth receiver input voltage First transmitter output voltage Second transmitter output voltage -5.5 V generated by the charge pump First receiver input voltage Third transmitter output voltage Third transmitter input voltage First transmitter input voltage Second transmitter input voltage Positive terminal of inverting charge pump capacitor Negative terminal of inverting charge pump capacitor Fourth receiver output voltage Fifth receiver output voltage Positive terminal of voltage- charge pump capacitor 5.5 V generated by the charge pump Supply voltage Drive high to override automatic circuitry keeping transmitters on (FORCEOFF must be high) First receiver output voltage Third receiver output voltage 3/16
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