Datasheet

©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
A
MS
1
-A
0
1. A
MS
= Most significant address
A
MS
=A
20
for SST39VF1681/1682
Address Inputs To provide memory addresses.
During Sector-Erase A
MS
-A
12
address lines will select the sector.
During Block-Erase A
MS
-A
16
address lines will select the block.
DQ
7
-DQ
0
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.
V
DD
Power Supply To provide power supply voltage: 2.7-3.6V
V
SS
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
V
SS
A0
DQ7
NC
DQ6
NC
DQ5
NC
DQ4
V
DD
NC
DQ3
NC
DQ2
NC
DQ1
NC
DQ0
OE#
V
SS
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
To p V i ew
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