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LC-19D1E/S-BK/WH

5 – 10

RS232C-DRIVER/RECEIVER

1

EN

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

LC-19D1E/S-BK/WH

5 – 11

 1ch Step Down switching regulato

1

RT

---

Timing Resistor  external terminal.

2

CT

---

Timing Capacitor external terminal.

3

ENB

I

Control terminal.

4

GD

O

Gate drive output terminal.

5

VCC

---

Power supply terminal.

6

GND

---

Ground.

7

COMP

O

Error amplifier output terminal.

8

FB

I

Error amplifier inverting input terminal.

LC-19D1E/S-BK/WH

5 – 12

DUAL OP-AMP

1

A OUTPUT

O

A output

2

A +INPUT

I

A + input

3

A -INPUT

I

A - input

4

V-

 

-

Ground

5

B +INPUT

I/O

B + input

6

B -INPUT

I

B - input

7

B OUTPUT

I

B output

8

V+

 -

Power supply

LC-19D1E/S-BK/WH

5 – 13

3-Video-SW

1

1B

I

1ch Input B.

2

1C

I

1ch Control Signal.

3

1Y

O

1ch Output.

4

GND2

I

2ch Ground

5

2Y

O

2ch Output.

6

3Y

O

3ch Output.

7

3C

I

3ch Contrl Signal.

8

3A

I

3ch Input A.

9

3B

I

3ch Input B.

10

GND3

-

3ch Ground.

11

2A

I

2ch Input A.

12

2C

I

2ch Contrl Signal.

13

VCC

-

Power supply .

14

2B

I

2ch Input B.

15

GND1

-

1ch Ground.

16

1A

I

1ch Input A.