UCC5686, UCC5687

27-LINE 3V - 5V LVD TERMINATOR FOR WIDE ULTRA2, ULTRA3,

ULTRA160, AND ULTRA320 SCSI WITH INTEGRATED SPI3 DELAY

SLUS459B – OCTOBER 2000 – REVISED APRIL 2001

5

POST OFFICE BOX 655303

APPLICATION INFORMATION

REG

STRMPWR

DISCNCT1

CONTROL AND

LOW BYTE

DIFFB

Termpower

0.1

µF

7

48

40

9

39

DIFSENS

CONTROL LINES (9)

21

22

60

59

L1+

L1–

L9+

L9–

DATA (8)

+ PARITY LINES

14

13

37

38

L10+

L10–

L18+

L18–

41

42

6

5

L19+

L19–

L27+

L27–

47

DISCNCT2

HIGH BYTE

PTRMPWR

8

4.7

µF

UCC5686

11

10

PGND

SGND

4.7

µF

0.01

µF

DATA (8)

+ PARITY LINES

STRMPWR

REG

DIFFB

40

39

9

7

48

DIFSENS

21

22

60

59

L1+

L1–

L9+

L9–

14

13

37

38

L10+

L10–

L18+

L18–

DISCNCT1

CONTROL AND

LOW BYTE

Termpower

41

42

6

5

L19+

L19–

L27+

L27–

47

DISCNCT2

HIGH BYTE

UCC5686

PTRMPWR

8

4.7

µF

11

10

PGND

SGND

4.7

µF

0.1

µF

0.01

µF

20 k

Ω

20 k

Ω

LVD

12

0.01

µF

0.01

µF

S1

S2

S4

S3

NOTE A: Close S1, S2, S3, and S4 to connect terminators in UCC5686. Open S1, S2, S3, and S4 to connect terminators in UCC5687.

Figure 1. Typical Application Diagram