5

LTC1685

DI (Pin 4): Driver Input. Controls the states of the A and

B outputs only if DE = High. If DE = Low, DI will have no

effect on A and B pins. Do not float.

GND (Pin 5): Ground.

A (Pin 6): Noninverting Receiver Input/Driver Output.

B (Pin 7): Inverting Receiver Input/Driver Output.

0.1

µF ceramic capacitor.

RO (Pin 1): Receiver Output. If A

≥ B by 300mV, then RO

will be high. If A

≤ B by 300mV, then RO will be low.

RE (Pin 2): Receiver Enable. RE = Low enables the

receiver. RE = High forces receiver output into high

impedance state. Do not float.

DE (Pin 3): Driver Enable. DE = High enables the driver.

DE = Low will force the driver output into a high impedance

state and the device will function as a line receiver if RE is

also low. Do not float.

Driver Propagation Delay

vs Temperature

Driver Propagation Delay

vs Driver Input Voltage

DRIVER INPUT VOLTAGE (V)

2.5

15

20

25

4.5

1685 G08

10

5

0

3.0

3.5

4.0

5.0

INPUT THRESHOLD = 1.5V

Driver Propagation Delay

vs Capacitive Load

LOAD CAPACITANCE (pF)

5

16.0

16.5

17.0

17.5

18.0

19.0

15

25

50

75

1685 G11

100

150

18.5

Receiver Maximum Data Rate

vs Input Overdrive

Receiver Propagation Delay

vs Temperature

TEMPERATURE (

°C)

–50

–25

0

10

25

0

50

75

1680 G09

5

20

15

25

100

125

RECEIVER INPUT DIFFERENTIAL (V)

0.3

40

50

70

0.6

1.0

1685 G10

30

20

0.4

0.5

0.7

1.5

2.5

10

0

60

TEMPERATURE (

°C)

–20

–40

0

5

10

15

20

25

0

20

40

60

1685 G07

80

100