±15kV ESD-Protected, 3.0V to 5.5V, Low-Power,

up to 250kbps, True RS-232 Transceiver

4

_______________________________________________________________________________________

__________________________________________Typical Operating Characteristics

-6

-5

-4

-3

-2

-1

0

1

2

3

4

5

6

0

1000

2000

3000

4000

5000

TRANSMITTER OUTPUT VOLTAGE

vs. LOAD CAPACITANCE

LOAD CAPACITANCE (pF)

T1 TRANSMITTING AT 250kbps

T2 TRANSMITTING AT 15.6kbps

0

6

2

4

10

8

14

12

16

0

1000

2000

3000

4000

5000

SLEW RATE vs. LOAD CAPACITANCE

LOAD CAPACITANCE (pF)

+SLEW

FOR DATA RATES UP TO 250kbps

-SLEW

0

25

20

15

5

10

35

30

40

45

0

2000

1000

3000

4000

5000

OPERATING SUPPLY CURRENT

vs. LOAD CAPACITANCE

LOAD CAPACITANCE (pF)

250kbps

120kbps

20kbps

T1 TRANSMITTING AT 250kbps

T2 TRANSMITTING AT 15.6kbps

1

No Connection. Not internally connected.

N.C.

3

+5.5V generated by the charge pump.

V+

4

Negative terminal of the voltage-doubler charge-pump capacitor.

C1-

5

Positive terminal of inverting charge-pump capacitor.

C2+

6

Negative terminal of inverting charge-pump capacitor.

C2-

7

-5.5V generated by the charge pump.

V-

8, 15

RS-232 Transmitter Outputs. High Z when SHDN is low.

T_OUT

9, 14

RS-232 Receiver Inputs

R_IN

10, 13

TTL/CMOS Receiver Outputs. High Z when SHDN is low.

R_OUT

11, 12

TTL/CMOS Transmitter Inputs

T_IN

16

Ground

GND

17

+3.0V to +5.5V Supply Voltage. Connect a 0.1µF capacitor to GND.

18

Active-Low Shutdown-Control Input. Drive low to shut down transmitters, receivers and

charge pumps.

SHDN

FUNCTION

NAME

______________________________________________________________ Pin Description

2

Positive terminal of the voltage-doubler charge-pump capacitor.

C1+

PIN

2

1, 10, 11

3

4

5

6

7

8, 17

9, 16

12, 15

13, 14

18

19

20

SO

SSOP