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MAX3227EIDBRG4 Datasheet(PDF) 3 Page - Texas Instruments |
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MAX3227EIDBRG4 Datasheet(HTML) 3 Page - Texas Instruments |
3 / 15 page www.ti.com DIN DOUT Auto-Powerdown Plus INVALID RIN FORCEOFF FORCEON ROUT 11 16 9 13 10 8 1 12 READY MAX3227E 3-V TO 5.5-V SINGLE-CHANNEL RS-232 LINE DRIVER/RECEIVER WITH ±15-kV IEC ESD PROTECTION SLLS715A – FEBRUARY 2006 – REVISED JUNE 2007 TERMINAL FUNCTIONS TERMINAL DESCRIPTION NAME NO. C1+ 2 Positive terminal of voltage-doubler charge-pump capacitor C1– 4 Negative terminal of voltage-doubler charge-pump capacitor C2+ 5 Positive terminal of inverting charge-pump capacitor C2– 6 Negative terminal of inverting charge-pump capacitor DIN 11 CMOS driver input DOUT 13 RS-232 driver output Force-off input, active low. Drive low to shut down drivers, receivers, and charge pump. This overrides auto-shutdown FORCEOFF 16 and FORCEON (see Function Table). Force-on input, active high. Drive high to override powerdown, keeping drivers and receivers on (FORCEOFF must FORCEON 12 be high) (see Function Table). GND 14 Ground INVALID 10 Valid signal detector output, active low. A logic high indicates that a valid RS-232 level is present on a receiver input. Ready to transmit output, active high. READY is enabled high when V– goes below –3.5 V and the device is ready to READY 1 transmit. RIN 8 RS-232 receiver input ROUT 9 CMOS receiver output V+ 3 +2 × V CC generated by the charge pump V– 7 –2 × V CC generated by the charge pump VCC 15 3-V to 5.5-V single-supply voltage LOGIC DIAGRAM (POSITIVE LOGIC) 3 Submit Documentation Feedback |
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