AC Electrical Characteristics (Note 6)

T

Symbol

Parameter

Conditions

Min

Typ

Max

Units

RS-422 CONNECTION, V

t

r

Output Rise Time

R

Ω,C

120

200

ns

t

f

Output Fall Time

R

Ω,C

120

200

ns

t

PDH

Output Propagation Delay

R

Ω,C

120

200

ns

t

PDL

Output Propagation Delay

R

Ω,C

120

200

ns

t

PZL

TRI-STATE Delay

R

Ω,C

250

350

ns

t

PZH

TRI-STATE Delay

R

Ω,C

180

300

ns

t

PLZ

TRI-STATE Delay

R

Ω,C

180

300

ns

t

PHZ

TRI-STATE Delay

R

Ω,C

250

350

ns

Symbol

Parameter

Conditions

Min

Typ

Max

Units

RS-423 CONNECTION, |V

≥ 2V

V

IH

High Level Input Voltage

2

V

V

IL

Low Level Input Voltage

0.8

V

I

IH

High Level Input Current

V

1

40

µA

V

IN

≤ 15V

10

100

µA

I

IL

Low Level Input Current

V

−30

−200

µA

V

I

Input Clamp Voltage

I

−1.5

V

V

O

Output Voltage

R

V

4.0

4.4

6.0

V

V

O

V

CC

≥ 4.75V

V

−4.0

−4.4

−6.0

V

V

T

Output Voltage

R

Ω

V

3.6

4.1

V

V

T

V

CC

≥ 4.75V

V

−3.6

−4.1

V

|V

Output Unbalance

|V

Ω

0.02

0.4

V

I

X

+

Output Leakage Power OFF

V

V

2

100

µA

I

X

−

Output Leakage Power OFF

V

V

−2

−100

µA

I

S

+

Output Short Circuit Current

V

V

−80

−150

mA

I

S

−

Output Short Circuit Current

V

V

80

150

mA

I

SLEW

Slew Control Current

µA

I

CC

Positive Supply Current

V

18

30

mA

I

EE

Negative Supply Current

V

−10

−22

mA

Note 2: “Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be guaranteed. They are not meant to imply that the devices

should be operated at these limits. The tables of “Electrical Characteristics” provide conditions for actual device operation.

Note 3: Unless otherwise specified, min/max limits apply across the −55˚C to +125˚C temperature range for the DS1691A and across the 0˚C to +70˚C range for

Note 4: All currents into device pins are positive; all currents out of device pins are negative. All voltages are referenced to ground unless otherwise specified.

Note 5: Only one output at a time should be shorted.

Note 6: Symbols and definitions correspond to EIA RS-422 and/or RS-423 where applicable.

Note 7: At −55˚C, the output voltage is +3.9V minimum and −3.9V minimum.

AC Electrical Characteristics (Note 6)

T

Symbol

Parameter

Conditions

Min

Typ

Max

Units

RS-423 CONNECTION, V

t

r

Rise Time

R

Ω,C

120

300

ns

t

f

Fall Time

R

Ω,C

120

300

ns

t

r

Rise Time

R

Ω,C

3.0

µs

t

f

Fall Time

R

Ω,C

3.0

µs

t

rc

Rise Time Coefficient

R

Ω,C

0.06

µs/pF

www.national.com

3