SN75ALS1711

TRIPLE DIFFERENTIAL BUS TRANSCEIVER

SLLS117B – APRIL 1991 – REVISED MAY 1995

4

POST OFFICE BOX 655303

DRIVER SECTION

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

temperature (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

5

V

VOD2

Differential output voltage

RL = 54 Ω,

See Figure 1

1.5

5

V

VOD3

Differential output voltage

See Note 3 and Figure 2

1.5

5

V

∆|VOD| Change in magnitude of differential output voltage‡

RL = 54 Ω,

See Figure 1

±0.2

V

VOC

Common-mode output voltage

RL = 54 Ω,

See Figure 1

3

–1

V

∆|VOC|

Change in magnitude of common-mode output

voltage‡

RL = 54 Ω,

See Figure 1

±0.2

V

IOZ

High impedance state output current

Output disabled,

VO = 12 V

1

mA

IOZ

High-impedance state output current

,

VCC = 5.25 V

VO = 7 V

– 0.8

mA

IIH

High-level input current, DE, EN, CDE

VIH = 2.4 V

20

µA

IIL

Low-level input current, DE, EN, CDE

VIL = 0.4 V

– 200

µA

IOS

Short circuit output current

VO = 12 V

– 250

mA

IOS

Short-circuit output current

VO = 7 V

250

mA

ICC

Supply current

No load

Outputs enabled

48

72

mA

ICC

Supply current

No load

Outputs disabled

30

48

mA

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

‡

∆|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.

NOTE 3: This applies for both power on and off; refer to ANSI Standard RS-485 for exact conditions.

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

tPLH

Differential propagation delay time, low- to high-level output

RL = 54 Ω,

CL = 100 pF,

8

13

22

ns

tPHL

Differential propagation delay time, high- to low-level output

L

,

See Figure 3

L

,

8

15

22

ns

tPZH

Output enable time to high level

S1 open,

30

50

60

tPHZ

Output disable time from high level

RL = 110 Ω,

,

S2 closed

4

16

30

ns

tPZL

Output enable time to low level

L

See Figure 4

S1 closed,

16

26

45

ns

tPLZ

Output disable time from low level

S2 open

4

8

20