Name: Sharp LC-40LE700E
Brand: Sharp
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LC-32/40/46LE700E/RU/S,LU700E/S,LX700E/RU,LC-52LE700E/RU/S

7 – 16

2.11. IC506 (VHiM3221EiP-1Y)

2.11.1 Block Diagram

2.11.2 Pin Connections and short description

Pin No. Pin Name I/O Pin Function

1EN I

Receiver Enable Control . Drive low for normal operation. Drive high to force the receiver outputs (R_OUT)

into a high-impedance state.

2 C1+ - Positive terminal of the voltage doubler Charge-Pump Capacitor

3 V+ - +5.5V generated by the charge pump

4 C1- - Negative terminal of the voltage doubler Charge-Pump Capacitor

5 C2+ - Positive terminal of inverting Charge-Pump Capacitor

6 C2- - Negative terminal of inverting Charge-Pump Capacitor

7 V- - -5.5V generated by the charge pump

8 R_IN I RS-232 Receiver Inputs

9 R_OUT O TTL/CMOS Receiver Outputs

10 INVALID I

Output of the Valid Signal Detector. INVALID is enabled high if a valid RS-232 level is present on any receiver

input.

11 T_IN I TTL/CMOS Transmitter Inputs

12 FORCEON I

Drive high to override automatic circuitry keeping transmitters and charge pump on (FORCEOFF must be

high)

13 T_OUT O RS-232 Transmitter Outputs

14 GND - Ground

15 VCC - +3.0V to +5.5V Supply Voltage

16 FORCEOFF I

Force-Off Input, active low. Drive low to shut down transmitters, receivers (MAX3243E, except R2OUTB),

and on-board charge pump . This overrides all automatic circuitry and FORCE ON

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