CY7C1021CV26

Document Number: 38-05589 Rev. *E

Page 3 of 15

Pin Configuration[2]

Selection Guide[1]

–15

Unit

Maximum Access Time

15

ns

Maximum Operating Current

80

mA

Maximum CMOS Standby Current

10

mA

Pin Definitions

Pin Name

Pin Number

I/O Type

Description

1–5, 18–21,

24–27, 42–44

Input

Address Inputs used to select one of the address locations.

29–32, 35–38

Input/Output

Bidirectional Data I/O lines. Used as input or output lines depending on operation.

NC

22, 23, 28

No Connect

No Connects. This pin is not connected to the die.

WE

17

Input/Control

Write Enable Input, active LOW. When selected LOW, a Write is conducted. When

selected HIGH, a Read is conducted.

CE

6

Input/Control

Chip Enable Input, active LOW. When LOW, selects the chip. When HIGH,

deselects the chip.

BHE, BLE 40, 39

Input/Control

OE

41

Input/Control

Output Enable, active LOW. Controls the direction of the I/O pins. When LOW, the

I/O pins are allowed to behave as outputs. When deasserted HIGH, I/O pins are

tri-stated, and act as input data pins.

12, 34

Ground

Ground for the device. Should be connected to ground of the system.

11, 33

Power Supply

Power Supply inputs to the device.

Notes

2. NC pins are not connected on the die.

WE

1

2

3

4

5

6

7

8

9

10

11

14

31

32

36

35

34

33

37

40

39

38

TSOP II -Top View

12

13

41

44

43

42

16

15

29

30

NC

OE

CE

BHE

NC

18

17

20

19

27

28

25

26

22

21

23

24

NC

BLE

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