SN65ALS180, SN75ALS180

DIFFERENTIAL DRIVER AND RECEIVER PAIRS

SLLS052G – AUGUST 1987 – REVISED APRIL 2003

6

POST OFFICE BOX 655303

SYMBOL EQUIVALENTS

DATA-SHEET

PARAMETER

TIA/EIA-422-B

TIA/EIA-485-A

VO

Voa, Vob

Voa, Vob

|VOD1|

Vo

Vo

|VOD2|

Vt (RL = 100 Ω)

Vt (RL = 54 Ω)

|VOD3|

Vt

(test termination measurement 2)

Vtest

Vtst

∆|VOD|

||Vt| – |Vt||

||Vt| – |Vt||

VOC

|Vos|

|Vos|

∆|VOC|

|Vos – Vos|

|Vos – Vos|

IOS

|Isa|, |Isb|

IO

|Ixa|, |Ixb|

Iia, Iib

RECEIVERS

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–)

60

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 6

2.7

V

VOL

Low-level output voltage

VID = –200 mV,

IOL = 8 mA,

See Figure 6

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 = 0 V

VI = 12 V

1

mA

II

Line input current

(see Note 6)

VI = –7 V

–0.8

mA

IIH

High-level enable-input current

VIH = 2.7 V

20

µA

IIL

Low-level enable-input current

VIL = 0.4 V

–100

µA

ri

Input resistance

12

k

Ω

IOS

Short-circuit output current

VID = 200 mV,

VO = 0

–15

–85

mA

ICC

Supply current

No load

Receiver outputs enabled,

Driver inputs disabled

19

30

mA

CC

y

Outputs disabled

19

26

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

‡ The algebraic convention, in which 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 6: This applies for both power on and power off. Refer to TIA/EIA-485-A for exact conditions.