SN65HVD1785, SN65HVD1786

SN65HVD1787, SN65HVD1791

SN65HVD1792, SN65HVD1793

SLLS872H – JANUARY 2008 – REVISED FEBRUARY 2010

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ELECTRICAL CHARACTERISTICS

over recommended operating conditions (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

RS-485 with

1.5

common-mode load,

1.4

Driver differential output voltage magnitude

V

Figure 1

1.5

2

2

2.5

Change in magnitude of driver differential output

–0.2

0

0.2

V

voltage

1

3

V

Change in differential driver output

–100

0

100

mV

common-mode voltage

Peak-to-peak driver common-mode output

Center of two 27-

Ω load resistors, See

500

mV

voltage

Figure 2

Differential output capacitance

23

pF

Positive-going receiver differential input voltage

–100

–10

mV

threshold

Negative-going receiver differential input

–200

–150

mV

voltage threshold

Receiver differential input voltage threshold

30

50

mV

2.4

– 0.3

Receiver high-level output voltage

V

4

0.2

0.4

Receiver low-level output voltage

V

0.2

0.5

Driver input, driver enable, and receiver enable

–100

100

mA

input current

Receiver output high-impedance current

–1

1

mA

Driver short-circuit output current

–250

250

mA

75

125

85, 86,

91, 92

–100

–40

Bus input current (disabled driver)

mA

500

87, 93

–400

Driver and receiver

RE = GND,

4

6

enabled

no load

Driver enabled,

3

5

mA

receiver disabled

no load

Supply current (quiescent)

DE = GND,

Driver disabled,

RE = GND,

2

4

receiver enabled

no load

DE = GND,

Driver and receiver

D = open

0.5

5

mA

disabled

no load

Supply current (dynamic)

See TYPICAL CHARACTERISTICS section

4

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