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MAX13235EEUP+ Datasheet(PDF) 9 Page - Maxim Integrated Products |
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MAX13235EEUP+ Datasheet(HTML) 9 Page - Maxim Integrated Products |
9 / 16 page 3Mbps RS-232 Transceivers with Low-Voltage Interface _______________________________________________________________________________________ 9 Pin Descriptions PIN MAX13234E/ MAX13235E MAX13236E/ MAX13237E TSSOP TQFN-EP TQFN-EP NAME FUNCTION 1 19 14 READY Ready to Transmit Output, Active-High. READY is enabled high when V- goes below -4V and the device is ready to transmit. 21 16 C1+ Positive Terminal of the Voltage Doubler Charge-Pump Capacitor 3 20 15 V+ +5.5V Generated by the Charge Pump 42 1 C1- Negative Terminal of the Voltage Doubler Charge-Pump Capacitor 5 3 2 C2+ Positive Terminal of the Inverting Charge-Pump Capacitor 6 4 3 C2- Negative Terminal of the Inverting Charge-Pump Capacitor 7 5 4 V- -5.5V Generated by the Charge Pump 8 6 — T2OUT RS-232 Transmitter Output 2 — — 5 RIN RS-232 Receiver Input 9 7 — R2IN RS-232 Receiver Input 2 — — 6 ROUT CMOS Receiver Output. VL referred logic. 10 8 — R2OUT CMOS Receiver Output 2. VL referred logic. 11 9 7 VL Logic-Level Supply. All CMOS inputs and outputs are related to this supply. — — 8 TIN CMOS Transmitter Input. VL referred logic. 12 10 — T2IN CMOS Transmitter Input 2. VL referred logic. 13 11 — T1IN CMOS Transmitter Input 1. VL referred logic. 14 12 9 FORCEON FORCEON Input, Active-High. VL referenced logic. Drive FORCEON high to override automatic circuitry keeping transmitters on ( FORCEOFF must be high). See Table 1. 15 13 — R1OUT CMOS Receiver Output 1. VL referred logic. — — 10 TOUT RS-232 Transmitter Output 16 14 — R1IN RS-232 Receiver Input 1 17 15 — T1OUT RS-232 Transmitter Output 1 18 16 11 GND Ground 19 17 12 VCC +3V to +5.5V Supply Voltage 20 18 13 FORCEOFF FORCEOFF Input, Active-Low. VL referenced logic. Drive FORCEOFF low to shut down transmitters and on-board charge pumps. All receiver and transmitter outputs are tri- stated. This overrides all automatic circuitry and FORCEON (Table 1). — — — EP Exposed Pad. Connect EP to GND or leave unconnected. |
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