SN65LBC175A, SN75LBC175A

QUADRUPLE RS485 DIFFERENTIAL LINE RECEIVERS

SLLS455B − NOVEMBER 2000 − REVISED MARCH 2005

4

POST OFFICE BOX 655303

electrical characteristics over recommended operating conditions

PARAMETER

TEST CONDITIONS

MIN

TYP†

MAX

UNIT

VIT+

Positive-going differential input voltage threshold

−80

−10

VIT−

Negative-going differential input voltage

threshold

−7 V < VCM < 12 V (VCM = (VA + VB ) / 2 )

−200

−120

mV

VHYS

Hysteresis voltage (VIT+ − VIT−)

−40

mV

VIK

Input clamp voltage

II = −18 mA

−1.5

−0.8

V

VOH

High-level output voltage

VID = 200 mV,

IOH = −8 mA

See Figure 1

2.7

4.8

V

VOL

Low-level output voltage

VID = −200 mV,

IOL = 8 mA

See Figure 1

0.2

0.4

V

IOZ

High-impedance-state output current

VO = 0 V to VCC

−1

1

µA

II

Line input current

Other input at 0 V,

V

= 0 V or 5 V

VI = 12 V

0.9

mA

II

Line input current

Other input at 0 V,

VCC = 0 V or 5 V

VI = −7 V

−0.7

mA

IIH

High-level input current

Enable inputs

100

µA

IIL

Low-level input current

Enable inputs

−100

µA

RI

Input resistance

A, B

12

k

Ω

ICC

Supply current

VID = 5 V

1,2EN, 3,4EN at 0 V

20

mA

ICC

Supply current

No load

1,2EN, 3,4EN at VCC

11

16

mA

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

switching characteristics over recommended operating conditions

PARAMETER

TEST CONDITIONS

MIN

TYP†

MAX

UNIT

tr

Output rise time

2

4

ns

tf

Output fall time

VID = −3 V to 3 V, See Figure 2

2

4

ns

tPLH

Propagation delay time, low-to-high level output

VID = −3 V to 3 V, See Figure 2

9

12

16

ns

tPHL

Propagation delay time, high-to-low level output

9

12

16

ns

tPZH

Propagation delay time, high-impedance to high-level output

See Figure 3

27

38

ns

tPHZ

Propagation delay time, high-level to high-impedance output

See Figure 3

7

16

ns

tPZL

Propagation delay time, high-impedance to low level output

See Figure 4

29

38

ns

tPLZ

Propagation delay time, low-level to high-impedance output

See Figure 4

12

16

ns

tsk(p)

Pulse skew (| (tPLH – tPHL) |)

0.2

1

ns

tsk(o)

Output skew (see Note 4)

2

ns

tsk(pp)

Part-to-part skew (see Note 5)

2

ns

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

NOTES:

4. Outputs skew (tsk(o)) is the magnitude of the time delay difference between the outputs of a single device with all of the inputs

connected together.

5. Part-to-part skew (tsk(pp)) is the magnitude of the difference in propagation delay times between any specified terminals of two

devices when both devices operate with the same input signals, the same supply voltages, at the same temperature, and have

identical packages and test circuits.