SN55976A2WD datasheet(8/39 Pages) TI2

8 / 39 page

SN75976A, SN55976A

9-CHANNEL DIFFERENTIAL TRANSCEIVER

SLLS218B – MAY 1995 – REVISED MAY 1997

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

electrical characteristics over recommended operating free-air temperature range (unless

otherwise noted)

PARAMETER

TEST CONDITIONS

SN55976A

SN75976A

UNIT

PARAMETER

TEST CONDITIONS

MIN

TYP†

MAX

MIN

TYP†

MAX

UNIT

S1 to A,

VT = 5 V,

See Figure 1

0.7

1.8

VODH

Driver differential high-

level output voltage

S1 to B,

TC ≥ 25°C

VT = 5 V,

See Figure 1

1.4

level out ut voltage

S1 to B,

See Figure 1

VT = 5 V,

0.7

0.8

D i

diff

ti l l

S1 to A,

TC ≥ 25°C

VT = 5 V,

See Figure 1

0.7

– 1.4

–1

– 1.4

VODL

Driver differential low-

level output voltage

S1 to B,

VT = 5 V,

See Figure 1

0.7

– 1.8

–1

– 1.8

level out ut voltage

S1 to A,

See Figure 1

VT = 5 V,

– 0.8

– 1.4

– 0.8

– 1.4

VOH

High-level output volt-

age

A side,

IOH = – 8 mA

VID = 200 mV,

See Figure 3

4.5

age

B side,

VT = 5 V,

See Figure 1

VOL

Low-level output volt-

age

A side,

IOH = 8 mA

VID = –200 mV,

See Figure 3

0.6

0.8

0.6

0.8

age

A side,

VT = 5 V,

See Figure 1

VIT+

Receiver positive-go-

ing differential input

threshold voltage

IOH = – 8 mA,

See Figure 3

0.2

VIT–

Receiver negative-

going differential input

threshold voltage

IOL = 8 mA,

See Figure 3

– 0.2

Vhys

Receiver input

hysteresis

(VIT+– VIT–)

VCC = 5 V,

TA = 25°C

VIH = 12 V,

VCC = 5 V,

Other input at 0 V

0.4

Bus input current

VIH = 12 V,

VCC = 0,

Other input at 0 V

0.5

Bus input current

VIH = – 7 V,

VCC = 5 V,

Other input at 0 V

– 0.4

– 0.8

– 0.4

– 0.8

VIH = – 7 V,

VCC = 0,

Other input at 0 V

– 0.3

– 0.8

– 0.3

– 0.8

IIH

High-level input cur-

A, BSR, DE/RE, and CRE,

VIH = 2 V

– 100

µA

IIH

rent

CDE0, CDE1, and CDE2,

VIH = 2V

100

µA

IIL

Low level input current

A, BSR, DE/RE, and CRE,

VIL = 0.8 V

– 100

µA

IIL

Low-level input current

CDE1, CDE1, and CDE2,

VIL = 0.8 V

100

µA

IOS

Short circuit output

current

nB+ or nB–

±260

IOZ

High-impedance-state

See IIH and IIL

IOZ

output current

nB+ or nB–

See II

Disabled

ICC

Supply current

All drivers enabled, no load

All receivers enabled, no load

Output capacitance

nB+ or nB– to GND

C d

Power dissipation

capacitance

Receiver

Cpd

capacitance

(see Note 4)

Driver

100

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

NOTE 4: Cpd determines the no-load dynamic supply current consumption, IS = CPD × VCC × f + ICC

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