3

7843A–AERO–10/09

AT68166HT

Pin Configuration

AT68166HT is packaged in a MQFPT68. The pin assignment depends on the access time.

There are 2 versions as described in the table below :

Access Time

25 ns

20 ns

18 ns

Package Version

YM

YS

YS

Table 1. Pin assignment for YS & YM versions

Lead

Signal

Lead

Signal

Lead

Signal

Lead

Signal

1

I/O0[0]

18

VCC

35

I/O3[7]

52

VCC

2

I/O0[1]

19

A11

36

I/O3[6]

53

A10

3

I/O0[2]

20

A12

37

I/O3[5]

54

A9

4

I/O0[3]

21

A13

38

I/O3[4]

55

A8

5

I/O0[4]

22

A14

39

I/O3[3]

56

A7

6

I/O0[5]

23

A15

40

I/O3[2]

57

A6

7

I/O0[6]

24

A16

41

I/O3[1]

58

WE0

8

I/O0[7]

25

CS0

42

I/O3[0]

59

CS3

9GND

26

OE

43

GND

60

GND

10

I/O1[0]

27

CS1

44

I/O2[7]

61

CS2

11

I/O1[1]

28

A17

45

I/O2[6]

62

A5

12

I/O1[2]

29

WE1

46

I/O2[5]

63

A4

13

I/O1[3]

30

WE2

47

I/O2[4]

64

A3

14

I/O1[4]

31

WE3

48

I/O2[3]

65

A2

15

I/O1[5]

32

A18

49

I/O2[2]

66

A1

16

I/O1[6]

33

YS

GND

50

I/O2[1]

67

A0

YM

NC

17

I/O1[7]

34

YS

VCC

51

I/O2[0]

68

YS

VCC

YM

NC

YM

NC