SN54ACT8990, SN74ACT8990

TEST-BUS CONTROLLERS

IEEE STD 1149.1 (JTAG) TAP MASTERS WITH 16-BIT GENERIC HOST INTERFACES

SCAS190E – JUNE 1990 – REVISED JANUARY 1997

3

POST OFFICE BOX 655303

SN74ACT8990 ...FN PACKAGE

(TOP VIEW)

TMS5/EVENT3

TMS4/EVENT2

TMS3/EVENT1

TMS2/EVENT0

GND

TMS1

TMS0

TDO

TCKO

TCKI

39

38

37

36

35

34

33

32

31

30

29

18 19

7

8

9

10

11

12

13

14

15

16

17

DATA0

DATA1

DATA2

DATA3

DATA4

GND

DATA5

DATA6

DATA7

DATA8

20 21 22 23

54

3

2

1

644

42 41 40

43

24 25 26 27 28

K

12

3

4

5

6

7

8

9

10

11

J

H

G

F

E

D

C

B

A

L

SN54ACT8990 ...GB PACKAGE

(TOP VIEW)