SN65ALS180, SN75ALS180

DIFFERENTIAL DRIVER AND RECEIVER PAIRS

SLLS052G – AUGUST 1987 – REVISED APRIL 2003

5

POST OFFICE BOX 655303

DRIVERS

electrical characteristics over recommended ranges of supply voltage and operating free-air

temperature range (unless otherwise noted)

PARAMETER

TEST CONDITIONS†

MIN

TYP‡

MAX

UNIT

VIK

Input clamp voltage

II = –18 mA

–1.5

V

VO

Output voltage

IO = 0

0

6

V

|VOD1|

Differential output voltage

IO = 0

1.5

6

V

|VOD2|

Differential output voltage

RL = 100 Ω,

See Figure 1

1/2 VOD1

or 2§

V

OD2

g

RL = 54 Ω,

See Figure 1

1.5

2.5

5

VOD3

Differential output voltage

Vtest = –7 V to 12 V,

See Figure 2

1.5

5

V

∆|VOD|

Change in magnitude of

differential output voltage¶

RL = 54 Ω or 100 Ω,

See Figure 1

±0.2

V

VOC

Common-mode output voltage

RL = 54 Ω or 100 Ω,

See Figure 1

3

–1

V

∆|VOC|

Change in magnitude of

common-mode output voltage¶

RL = 54 Ω or 100 Ω,

See Figure 1

±0.2

V

IO

Output current

Output disabled

VO = 12 V

1

mA

IO

Output current

(see Note 5)

VO = –7 V

–0.8

mA

IIH

High-level input current

VI = 2.4 V

20

µA

IIL

Low-level input current

VI = 0.4 V

–400

µA

#

VO = –6 V

SN75ALS180

–250

#

VO = –4 V

SN65ALS180

–250

IOS

Short-circuit output current#

VO = 0

All

–150

mA

VO = VCC

All

250

VO = 8 V

All

250

ICC

Supply current

No load

Driver outputs enabled,

Receiver disabled

25

30

mA

CC

y

Outputs disabled

19

26

† The power-off measurement in TIA/EIA-422-B applies to disabled outputs only and is not applied to combined inputs and outputs.

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

§ The minimum VOD2 with 100-Ω load is either 1/2 VOD2 or 2 V, whichever is greater.

¶

∆|VOD| and ∆|VOC| are the changes in magnitude of VOD and VOC, respectively, that occur when the input is changed from a high level to a low

level.

# Duration of the short circuit should not exceed one second for this test.

NOTE 5: This applies for both power on and off; refer to TIA/EIA-485-A for exact conditions. The TIA/EIA-422-B limit does not apply for a combined

driver and receiver terminal.

switching characteristics over recommended ranges of supply voltage and operating free-air

temperature

PARAMETER

TEST CONDITIONS

MIN

TYP‡

MAX

UNIT

td(OD)

Differential output delay time

RL = 54 Ω,

CL = 50 pF,

See Figure 3

3

8

13

ns

Pulse skew (

td(ODH) – td(ODL))

RL = 54 Ω,

CL = 50 pF,

See Figure 3

1

6

ns

tt(OD)

Differential output transition time

RL = 54 Ω,

CL = 50 pF,

See Figure 3

3

8

13

ns

tPZH

Output enable time to high level

RL = 110 Ω,

See Figure 4

23

50

ns

tPZL

Output enable time to low level

RL = 110 Ω,

See Figure 5

19

24

ns

tPHZ

Output disable time from high level

RL = 110 Ω,

See Figure 4

8

13

ns

tPLZ

Output disable time from low level

RL = 110 Ω,

See Figure 5

8

13

ns

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