©2011 Silicon Storage Technology, Inc.

DS25040A

05/11

4

16 Mbit Multi-Purpose Flash Plus

SST39VF1681 / SST39VF1682

Data Sheet

A Microchip Technology Company

Figure 3: Pin Assignments for 48-lead TSOP

Table 1: Pin Description

Symbol

Pin Name

Functions

Address Inputs

To provide memory addresses.

Data Input/output To output data during Read cycles and receive input data during Write cycles.

Data is internally latched during a Write cycle.

The outputs are in tri-state when OE# or CE# is high.

WP#

Write Protect

To protect the top/bottom boot block from Erase/Program operation when

grounded.

RST#

Reset

To reset and return the device to Read mode.

CE#

Chip Enable

To activate the device when CE# is low.

OE#

Output Enable

To gate the data output buffers.

WE#

Write Enable

To control the Write operations.

Power Supply

To provide power supply voltage: 2.7-3.6V

Ground

NC

No Connection

Unconnected pins.

T1.1 25040

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

A17

NC

VSS

A0

DQ7

NC

DQ6

NC

DQ5

NC

DQ4

VDD

NC

DQ3

NC

DQ2

NC

DQ1

NC

DQ0

OE#

VSS

CE#

A1

48

47

46

45

44

43

42

41

40

39

38

37

36

35

34

33

32

31

30

29

28

27

26

25

1243 48-tsop P2.0

Standard Pinout

Top View

Die Up

A16

A15

A14

A13

A12

A11

A10

A9

A20

NC

WE#

RST#

NC

WP#

NC

A19

A18

A8

A7

A6

A5

A4

A3

A2