SN75970B

SCSI DIFFERENTIAL CONVERTER-CONTROL

SLLS323A – NOVEMBER 1999 – REVISED JANUARY 2000

6

POST OFFICE BOX 655303

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

otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP†

MAX

UNIT

VOD(H)

Driver differential

high-level output voltage

B side except BBSY,

BRST, and BSEL

See Figure 1

–0.8

–2.2

V

VOD(L)

Driver differential

low-level output voltage

B side

See Figure 1

1

1.8

V

AACK –, AATN –,

AC/D –, AI/O –,

AMSG –, AREQ –

VID = – 200 V, IOH = – 16 mA

2.5

4.3

V

Hi h l

l

t

t

lt

DRVBUS, SDB

IOH = – 16 mA

2.5

4.4

V

VOH

High-level output voltage

TIMEOUT

Test and RESET at 0.8 V,

All others open, IOH = – 16 mA

2.5

4.5

V

B side

3.4

X2

IOH = - 4 mA

3.2

DRVBUS, SDB

IOL = 16 mA

0.8

VOL

Low level output voltage

A side

VID = 200 mV, IOL = 16 mA

0.8

V

VOL

Low-level output voltage

B side

1.6

V

X2

IOL = 4 mA

0.8

VIT

Receiver positive-going

B side

IOH = – 16 mA, See Figure 2

0.2

V

VIT+

gg

input threshold voltage

TIMEOUT

2.6

V

VIT

Receiver negative-going

B side

IOL = 16 mA, See Figure 2

– 0.2‡

V

VIT–

gg

g

input threshold voltage

TIMEOUT

0.32 VCC

0.4 VCC

V

Vh

Receiver input hysteresis

B side

45

mV

Vhys

y

(VIT+ – VIT– )

TIMEOUT

0.5

V

VI = 12 V, VCC = 5 V,

All other inputs at 0 V

0.6

1

II

Bus input current

B side

VI = 12 V, VCC = 0,

All other inputs at 0 V

0.7

1

mA

II

Bus input current

B side

VI = –7 V, VCC = 5 V,

All other inputs at 0 V

– 0.5

– 0.8

mA

VI = –7 V, VCC = 0,

All other inputs at 0 V

– 0.4

– 0.8

A side

– 2.0

–6

–8

mA

DSENS, RESET,

RSTFLTR

VIH = 2 V

–60

– 100

IIH

High-level input current

CLK40, X1/CLK20

IH

±20

IIH

High-level in ut current

TEST

100

µA

TIMEOUT

TEST at 2 V, A side and other

control inputs at 0.8 V,

B side open,

VIH = 2 V

±25

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

‡ The algebraic convention with the least positive (more negative) limit is designated minimum, is used in this data sheet for the differential input

voltage only.