LT1781 查看數據表（PDF） - Linear Technology

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LT1781

Low Power 5V RS232 Dual Driver/Receiver with ±15kV ESD Protection

Linear Technology 

TYPICAL PERFOR A CE CHARACTERISTICS

LT1780/LT1781

Driver Leakage in Shutdown

100

10

VOUT = 30V

1

VOUT = –30V

0.1

–55 –25

0 25 50 75

TEMPERATURE (°C)

100 125

1780 • G08

Receiver Short-Circuit Current

50

40

RX ISC–

30

RX ISC+

20

10

0

–55 –25

0 25 50 75

TEMPERATURE (°C)

100 125

1780 • G10

DRIVER 1

OUTPUT

Shutdown to Driver Outputs

10V

5V

GND

GND

DRIVER 2 – 5V

OUTPUT

– 10V

ON/OFF PIN

1780 • G12

Driver Short-Circuit Current

30

25

ISC+

20

15

ISC –

10

5

0

–55 –25

0 25 50 75

TEMPERATURE (°C)

100 125

1780 • G09

Slew Rate vs Load Capacitance

16

14

12

10

8

+SLEW

6

–SLEW

4

2

0

0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0

LOAD CAPACITANCE (nF)

1780 • G11

Driver Output Waveforms

DRIVER OUTPUT

RL = 3k

CL = 2500pF

DRIVER OUTPUT

RL = 3k

INPUT

1780 • G13

5

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