4

LT1785/LT1785A

LT1791/LT1791A

SWITCHI G CHARACTERISTICS

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Driver Input to Output

Figures 3, 5

q

700

2000

ns

Driver Input to Output

Figures 3, 5

q

700

2000

ns

Driver Output to Output

Figures 3, 5

100

ns

Driver Rise or Fall Time

Figures 3, 5

q

200

800

2000

ns

Driver Enable to Output High

Figures 4, 6

q

500

3000

ns

Driver Enable to Output Low

Figures 4, 6

q

800

3000

ns

Driver Disable Time from Low

Figures 4, 6

q

200

5000

ns

Driver Disable Time from High

Figures 4, 6

q

800

5000

ns

Receiver Input to Output

Figures 3, 7

q

400

900

ns

Receiver Input to Output

Figures 3, 7

q

400

900

ns

Differential Receiver Skew

200

ns

Receiver Enable to Output Low

Figures 2, 8

q

300

1000

ns

Receiver Enable to Output High

Figures 2, 8

q

300

1000

ns

Receiver Disable from Low

Figures 2, 8

q

400

1000

ns

Receiver Disable from High

Figures 2, 8

q

400

1000

ns

Maximum Data Rate

q

250

kbps

Time to Shut Down

Figures 2, 6, 8

3

µs

Driver Enable from Shutdown to Output High

Figures 2, 6; RE = 5V

12

µs

Driver Enable from Shutdown to Output Low

Figures 2, 6; RE = 5V

12

µs

Receiver Enable from Shutdown to Output High

Figures 2, 8; DE = 0V

4

µs

Receiver Enable from Shutdown to Output Low

Figures 2, 8; DE = 0V

4

µs

Note 1: Absolute Maximum Ratings are those values beyond which the life

of a device may be impaired.

LOAD RESISTANCE (

Ω)

10

4

3

2

1

0

100

1k

1785/91 G01

Driver Differential Output Voltage

vs Load Resistance

TEMPERATURE (

°C)

–40

1000

800

600

400

200

0

0

40

60

1785/91 G03

–20

20

80

100

Receiver Propagation Delay

vs Temperature

TEMPERATURE (

°C)

–40

3.0

2.5

2.0

1.5

1.0

0.5

0

0

40

60

1785/91 G03

–20

20

80

100

R = 27

Ω

Driver Differential Output Voltage

vs Temperature