Rev. 10/22/01

SP385E Enhanced +3V to +5V RS-232 Line Driver/Receiver

© Copyright 2001 Sipex Corporation

4

10

9

R IN

R OUT

2

13

14

R IN

R OUT

1

11

8

T IN

2

T OUT

2

12

15

T IN

1

T OUT

1

16

GND

400k

Ω

400k

Ω

4

2

C +

C -

1

1

7

17

V

CC

V+

+

+

1.0

µF

6.3V

+5V to +10V

Voltage Doubler

+5V INPUT

3

V-

2

1

5k

Ω

0.1

µF

16V

5k

Ω

6

5

C +

C -

2

2

+

1.0

µF

16V

+10V to -10V

Voltage Inverter

10

µF

SP311E

+

18

ON/OFF

+

0.1

µF

16V

SOIC Package

PINOUT

TYPICAL OPERATING CIRCUIT

12

9

R IN

R OUT

2

15

16

R IN

R OUT

1

13

8

T IN

2

T OUT

2

14

17

T IN

1

T OUT

1

18

GND

400k

Ω

400k

Ω

4

2

C +

C -

1

1

7

19

V

CC

V+

+

+

1.0

µF

6.3V

+5V to +10V

Voltage Doubler

+5V INPUT

3

V-

2

1

5k

Ω

0.1

µF

16V

5k

Ω

6

5

C +

C -

2

2

+

1.0

µF

16V

+10V to -10V

Voltage Inverter

10

µF

SP311E

+

20

ON/OFF

+

0.1

µF

16V

SSOP Package

SP385E

SP385E

ON/OFF

V

GND

T OUT

R IN

R OUT

T IN

T IN

R OUT

N/C

N/C

C +

V+

C -

C +

C -

V-

T OUT

R IN

N/C

1

2

3

4

5

6

7

8

9

10

20

19

18

17

16

15

14

13

12

11

1

1

CC

2

2

2

1

2

2

1

1

1

2

ON/OFF

V

GND

T OUT

R IN

R OUT

T IN

T IN

R OUT

N/C

C +

V+

C -

C +

C -

V-

T OUT

R IN

2

1

2

3

4

5

6

7

8

9

18

17

16

15

14

13

12

11

10

1

1

CC

2

2

2

1

2

2

1

1

1

18-pin SOIC

20-pin SSOP