SN75ALS085

LAN ACCESS UNIT INTERFACE DUAL DRIVER/RECEIVER

SLLS054D – APRIL 1989 – REVISED OCTOBER 2001

7

POST OFFICE BOX 655303

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

temperature (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

MAX

UNIT

VIK

Clamp voltage at all inputs

II = – 18 mA

– 1.5

V

VCC = 4.75 V

3.202

3.752

TA = 0°C

VCC = 5 V

3.389

3.998

VCC = 5.25 V

3.577

4.244

VCC = 4.75 V

3.213

3.797

V(TO) Driver input (TXI) threshold voltage

TA = 25°C

VCC = 5 V

3.400

4.043

V

()

VCC = 5.25 V

3.588

4.289

VCC = 4.75 V

3.239

3.849

TA = 70°C

VCC = 5 V

3.426

4.095

VCC = 5.25 V

3.614

4.341

Receiver differential input threshold voltage

– 275

mV

Idle

TXEN at 0.8 V,

LOOP1 at 2 V,

LOOP2 at 2 V,

See Figure 1

1

4.2

VOC

Driver output (TXO) common-mode voltage

Active

TXEN at 2 V,

LOOP1 at 2 V,

LOOP2 at 2 V,

TXI at 3.2 V,

See Figure 1

1

4.2

V

Active

TXEN at 2 V,

LOOP1 at 2 V,

LOOP2 at 2 V,

TXI at 4.4 V,

See Figure 1

1

4.2

Idle

TXEN at 0.8 V,

LOOP1 at 2 V,

LOOP2 at 2 V,

See Figure 1

±40

VOD

Driver output (TXO) differential voltage

Active

TXEN at 2 V,

LOOP1 at 2 V,

LOOP2 at 2 V,

TXI at 3.2 V,

See Figure 1

– 600

1315

mV

Active

TXEN at 2 V,

LOOP1 at 2 V,

LOOP2 at 2 V,

TXI at 4.4 V,

See Figure 1

600

1315

VOH

High-level output voltage

RXO, RXEN

IOH = – 0.4 mA

2.4

V

VOL

Low-level output voltage

RXO, RXEN

IOL = 16 mA

0.5

V

TXEN, LOOP

VI = 2 V

20

IIH

High-level input current

TXI

VI = 4.5 V

400

µA

RXI, RXI

VID = – 0.5 V,

VIC = 1 V to 4.2 V

1000

TXEN, LOOP

VI = 0.8 V

– 200

IIL

Low level input current

TXI

VI = 3.1 V

100

µA

IIL

Low-level input current

TXI

VI = 0.3 V

4

10

µA

RXI, RXI

VID = 0.5 V,

VIC = 1 V to 4.2 V

1000

IOD

Driver differential output current

Idle

TXEN at 0.8 V,

LOOP1 at 2 V,

LOOP2 at 2 V,

See Figure 2

±4

mA

IOS

Short-circuit output current†

RXO, RXEN

VO at 0 V,

RXI at 3 V,

RXI at 2 V

– 40

– 150

mA

ICC

Supply current

LOOP2 at 2 V,

TXEN at 2 V,

TXI at 4.5 V,

Outputs open

225

mA

† Not more than one output should be shorted at a time, and the duration of the test should not exceed 1 second.