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ICL3225IAZ-T Datasheet(PDF) 3 Page - Intersil Corporation |
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ICL3225IAZ-T Datasheet(HTML) 3 Page - Intersil Corporation |
3 / 18 page 3 FN4878.8 February 27, 2006 Pin Descriptions PIN FUNCTION VCC System power supply input (3.0V to 5.5V). V+ Internally generated positive transmitter supply (+5.5V). V- Internally generated negative transmitter supply (-5.5V). GND Ground connection. C1+ External capacitor (voltage doubler) is connected to this lead. C1- External capacitor (voltage doubler) is connected to this lead. C2+ External capacitor (voltage inverter) is connected to this lead. C2- External capacitor (voltage inverter) is connected to this lead. TIN TTL/CMOS compatible transmitter Inputs. TOUT RS-232 level (nominally ±5.5V) transmitter outputs. RIN RS-232 compatible receiver inputs. ROUT TTL/CMOS level receiver outputs. ROUTB TTL/CMOS level, noninverting, always enabled receiver outputs. INVALID Active low output that indicates if no valid RS-232 levels are present on any receiver input. READY Active high output that indicates when the ICL32XXE is ready to transmit (i.e., V- ≤ -4V) FORCEOFF Active low to shut down transmitters and on-chip power supply. This overrides any automatic circuitry and FORCEON (see Table 2). FORCEON Active high input to override automatic powerdown circuitry thereby keeping transmitters active. (FORCEOFF must be high). Typical Operating Circuits ICL3225 19 VCC T1OUT T2OUT T1IN T2IN T1 T2 0.1 µF + 0.1 µF + 0.1 µF 13 12 17 8 2 4 3 7 V+ V- C1+ C1- C2+ C2- + 0.1 µF 5 6 R1OUT R1IN 16 5k Ω R2OUT R2IN 9 10 5k Ω 15 C1 C2 + C3 C4 READY 1 GND +3.3V + 0.1 µF 18 TTL/CMOS LOGIC LEVELS RS-232 LEVELS R1 R2 FORCEON FORCEOFF 14 20 VCC 11 INVALID TO POWER CONTROL LOGIC ICL3225, ICL3245 |
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