SN75C185

LOW-POWER MULTIPLE DRIVERS AND RECEIVERS

SLLS065F – AUGUST 1989 – REVISED JANUARY 2000

6

POST OFFICE BOX 655303

RECEIVER SECTION

PARAMETER

TEST CONDITIONS

MIN

TYP†

MAX

UNIT

VIT+

Positive-going input threshhold

voltage

See Figure 5

1.6

2.1

2.55

V

VIT–

Negative-going input threshhold

voltage

See Figure 5

0.65

1

1.25

V

Vhys

Input hysteresis voltage

(VIT + – VIT–)

600

1100

mV

VI = 0.75 V,

IOH = – 20 µA, See Figure 5 and Note 8

3.5

VOH

High level output voltage

VI = 0.75 V,

VCC = 4.5 V

2.8

4.4

V

VOH

High-level output voltage

VI = 0.75 V,

IOH = – 1 mA, VCC = 5 V

3.8

4.9

V

See Figure 5

VCC = 5.5 V

4.3

5.4

VOL

Low-level output voltage

VI = 3 V,

IOL = 3.2 mA,

See Figure 5

0.17

0.4

V

IIH

High level input current

VI = 3 V

0.43

0.55

1

mA

IIH

High-level input current

VI = 25 V

3.6

4.6

8.3

mA

IIL

Low level input current

VI = – 3 V

– 0.43

– 0.55

–1

mA

IIL

Low-level input current

VI = – 25 V

– 3.6

– 5.0

– 8.3

mA

IOS(H) Short-circuit output at high level

VI = 0.75 V,

VO = 0,

See Figure 4

–8

–15

mA

IOS(L) Short-circuit output at low level

VI = VCC,

VO = VCC,

See Figure 4

13

25

mA

† All typical values are at TA = 25°C.

NOTE 8: If the inputs are left unconnected, the receiver interprets this as an input low, and the receiver outputs remain in the high state.

noted) (see Figure 6)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

tPLH

Propagation delay time, low- to high-level output

3

4

µs

tPHL

Propagation delay time, high- to low-level output

RL =5kΩ

CL =50 pF

3

4

µs

tTLH

Transition time, low- to high-level output

RL = 5 kΩ,

CL = 50 pF

300

450

ns

tTHL

Transition time, high- to low-level output

100

300

ns

tw(N)

Duration of longest pulse rejected as noise

(see Note 9)

RL = 5 kΩ,

CL = 50 pF

1

4

µs

NOTE 9: The receiver ignores any postive- or negative-going pulse that is less than the minimum value of tw(N) and accepts any positive- or

negative-going pulse greater than the maximum of tw(N).