SN75179B

DIFFERENTIAL DRIVER AND RECEIVER PAIR

SLLS003E – OCTOBER 1985 – REVISED JUNE 1998

5

POST OFFICE BOX 655303

RECEIVER SECTION

electrical characteristics over recommended ranges of common-mode input voltage, supply

voltage, and operating free-air temperature (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP†

MAX

UNIT

VIT +

Positive-going input threshold voltage

VO = 2.7 V,

IO = – 0.4 mA

0.2

V

VIT –

Negative-going input threshold voltage

VO = 0.5 V,

IO = 8 mA

– 0.2‡

V

Vhys

Hysteresis voltage (VIT + – VIT –)

50

mV

VOH

High-level output voltage

VID = 200 mV,

IOH = – 400 µA,

See Figure 2

2.7

V

VOL

Low-level output voltage

VID = – 200 mV,

IOL = 8 mA,

See Figure 2

0.45

V

II

Line input current

Other input at 0 V

See Note 5

VI = 12 V

1

mA

II

Line input current

Other input at 0 V,

See Note 5

VI = – 7 V

– 0.8

mA

ri

Input resistance

12

k

Ω

IOS

Short-circuit output current

–15

–85

mA

ICC

Supply current (total package)

No load

57

70

mA

† All typical values are at VCC = 5 V, TA = 25°C.

‡ The algebraic convention, where the less positive (more negative) limit is designated minimum, is used in this data sheet for common-mode input

voltage and threshold voltage levels only.

NOTE 5: Refer to TIA/EIA-422-B for exact conditions.

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

tPLH

Propagation delay time, low- to high-level output

VID = – 1.5 V to 1.5 V,

19

35

ns

tPHL

Propagation delay time, high- to low-level output

ID

CL = 15 pF,

See Figure 4

30

40

ns

PARAMETER MEASUREMENT INFORMATION

VOD2

RL

2

VOC

RL

2

VID

–IOH

VOH

+ IOL

VOL