SN75LBC971A

SCSI DIFFERENTIAL CONVERTER-DATA

SLLS186B – OCTOBER 1994 – REVISED JULY 1997

6

POST OFFICE BOX 655303

electrical characteristics over recommended operating conditions (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP†

MAX

UNIT

VOD(H) Driver high-level differential output voltage

See Figure 1

1

1.8

V

VOD(L)

Driver low-level differential output voltage

See Figure 1

– 1

– 2.2

V

VOH

High level output voltage

A side

VID = – 200 mV,

IOH = – 16 mA

2.5

4.2

V

VOH

High-level output voltage

B side

IOH = – 60 mA

3.4

V

VOL

Low level output voltage

A side

VID = 200 mV,

IOL = 16 mA

0.4

0.8

V

VOL

Low-level output voltage

B side

IOL = 60 mA

1.6

V

VIT+

Receiver positive-going

differential input

threshold voltage

IOH = – 16 mA

See Figure 2

0.2

V

VIT–

Receiver negative-going

differential input

threshold voltage

B side

IOL = 16 mA

See Figure 2

– 0.2

V

Vhys

Receiver input hysteresis

voltage (VIT + – VIT –)

35

45

mV

VI = 12 V,

VCC = 5 V

0.6

1

mA

II

Bus input current

BorB

I

,

Other input at 0 V

VCC = 0

0.7

1

mA

II

Bus input current

B or B

VI = – 7 V,

VCC = 5 V

– 0.5

– 0.8

mA

I

,

Other input at 0 V

VCC = 0

– 0.4

– 0.8

mA

A side

– 2.9

–5

–8

mA

IIH

High-level input current

RESET, DSENS

VIH = 2 V

–70

– 100

µA

SDB, DRVBUS

8

20

µA

A side

–6

–8

mA

IIL

Low-level input current

RESET, DSENS

VIL = 0.8 V

–66

– 100

µA

SDB, DRVBUS

±1

µA

IOS

Short-circuit output

current

B side

VO = 5 V and 0

±250

mA

IOZ

High-impedance-state

A side

See IIH and IIL

IOZ

g

output current

B side

See II

Disabled

RESET at 0.8 V,

Others open

23

33

ICC

Supply current

B to A

Enabled

SDB and DRVBUS at 2 V,

All other inputs open,

VID = – 1 V,

No load

36

mA

A to B

Enabled

SDB at 0.8 V,

All other inputs open,

DRVBUS at 2 V,

No load

4

9

CO

Output capacitance

VI = 0.6 sin(2π × 106t) + 1.5 V, BDBn to GND

19

21

pF

Cpd

Power dissipation capacitance‡

B to A,

One channel

100

pF

Cpd

Power dissipation capacitance‡

A to B,

One channel

450

pF

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

‡ Cpd determines the no-load dynamic current consumption, IS = Cpd × VCC × f + ICC (ICC depends on the output states and load circuits and is

not necessarily the ICC specified in the Electrical Characteristics Table).