SN75ALS175

QUADRUPLE DIFFERENTIAL LINE RECEIVER

SLLS131C – SEPTEMBER 1991 – REVISED MAY 1995

4

POST OFFICE BOX 655303

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

voltage and operating free-air temperature (unless otherwise noted) (see Note 3)

PARAMETER

TEST CONDITIONS

MIN

TYP†

MAX

UNIT

VIT+

Positive-going input threshold voltage

200

mV

VIT–

Negative-going input threshold

voltage

–200‡

mV

Vhys

Hysteresis voltage (VIT + – VIT –)

50

mV

VIK

Enable-input clamp voltage

II = – 18 mA

– 1.5

V

VOH

High-level output voltage

VID = 200 mV,

IOH = – 400 µA,

See Figure 1

2.7

V

VOL

Low-level output voltage

VID = – 200 mV,

IOL = 8 mA,

See Figure 1

0.45

V

IOZ

High-impedance-state output current

VO = 0.4 V to 2.4 V

±20

µA

II

Line input current

Other input at 0 V

See Note 3

VI = 12 V

1

mA

II

Line input current

Other input at 0 V,

See Note 3

VI = – 7 V

– 0.8

mA

IIH

High-level enable-input current

VIH(E) = 2.7 V

20

µA

IIL

Low-level enable-input current

VIL(E) = 0.4 V

– 100

µA

ri

Input resistance

12

k

Ω

IOS

Short-circuit output current

VO = 0

–15

–85

mA

ICC

Suply current (total package)

No load,

Outputs enabled

16

24

mA

ICC

Suply current (total package)

No load,

Outputs disabled

18

27

mA

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

‡ The algebraic convention, in which the less positive (more negative) limit is designated as minimum, is used in this data sheet for threshold voltage

levels only.

NOTE 3: Refer to ANSI Standard RS-485 for exact conditions.

PARAMETER

TEST CONDITIONS

MIN

TYP†

MAX

UNIT

tPHL

Propagation delay time, high- to low-level output

VID = – 2.5 V to 2.5 V,

9

18

27

ns

tPLH

Propagation delay time, low- to high-level output

CL = 15 pF,

See Figure 2

9

18

27

ns

tPZH

Output enable time to high level

CL =15 pF

See Figure 3

4

12

18

ns

tPZL

Output enable time to low level

CL = 15 pF,

See Figure 3

6

13

21

ns

tPHZ

Output disable time from high level

CL =15 pF

See Figure 3

10

21

27

ns

tPLZ

Output disable time from low level

CL = 15 pF,

See Figure 3

8

15

25

ns

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