SN54ACT8990, SN74ACT8990

TEST-BUS CONTROLLERS

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

SCAS190E – JUNE 1990 – REVISED JANUARY 1997

2

POST OFFICE BOX 655303

description (continued)

The SN54ACT8990 is characterized for operation over the full military temperature range of –55

°C to 125°C.

The SN74ACT8990 is characterized for operation from 0

°C to 70°C.

28 29

NC

TMS5/EVENT3

TMS4/EVENT2

NC

TMS3/EVENT1

TMS2/EVENT0

NC

GND

TMS1

NC

TMS0

TDO

NC

TCKO

TCKI

NC

60

59

58

57

56

55

54

53

52

51

50

49

48

47

46

45

44

30

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

NC

DATA0

DATA1

NC

DATA2

DATA3

NC

DATA4

GND

NC

DATA5

DATA6

NC

DATA7

DATA8

NC

31 32 33 34

8

7654

93

1 68 67

2

35 36 37 38 39

66 65

27

64 63 62 61

40 41 42 43

SN54ACT8990 . . . HV PACKAGE

(TOP VIEW)

NC – No internal connection