STK14CA8-NF25ITR 查看數據表（PDF） - Simtek Corporation
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STK14CA8-NF25ITR Datasheet PDF : 21 Pages
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STK14CA8
VCAP
1
A16 2
A14 3
A12 4
A7 5
A6 6
A5 7
NC 8
A4 9
NC 10
NC 11
NC 12
VSS 13
NC 14
NC 15
DQ0 16
A3 17
A2 18
A1 19
A0 20
DQ1 21
DQ2 22
NC 23
NC 24
48 VCC
47 A15
46 HSB
45 W
44 A13
43 A8
42 A9
41 NC
40 A11
39 NC
38 NC
37 NC
36 VSS
35 NC
34 NC
33 DQ6
32 G
31 A10
30 E
29 DQ7
28 DQ5
27 DQ4
26 DQ3
25 VCC
48-Pin SSOP
PIN DESCRIPTIONS
Pin Name
I/O
A16-A0
DQ7-DQ0
E
Input
I/O
Input
W
Input
G
Input
VCC
HSB
Power Supply
I/O
VCAP
VSS
NC
Power Supply
Power Supply
No Connect
PACKAGES
VCAP
A16
A14
A12
A7
A6
A5
A4
A3
A2
A1
A0
DQ0
DQ1
DQ2
VSS
1
32
2
31
3
30
4
29
5
28
6
27
7
26
8
25
9
24
10
23
11
22
12
21
13
20
14
19
15
18
16
17
32-Pin SOIC
VCC
A15
HSB
W
A13
A8
A9
A11
G
A10
E
DQ7
DQ6
DQ5
DQ4
DQ3
Relative PCB area usage.
See page 17 for detailed package
size specifications.
Description
Address: The 17 address inputs select one of 131,072 bytes in the nvSRAM array
Data: Bi-directional 8-bit data bus for accessing the nvSRAM
Chip Enable: The active low E input selects the device
Write Enable: The active low W enables data on the DQ pins to be written to the address
location latched by the falling edge of E
Output Enable: The active low G input enables the data output buffers during read cycles.
De-asserting G high caused the DQ pins to tri-state.
Power: 3.0V, +20%, -10%
Hardware Store Busy: When low this output indicates a Store is in progress. When pulled
low external to the chip, it will initiate a nonvolatile STORE operation. A weak pull up resistor
keeps this pin high if not connected. (Connection Optional).
Autostore Capacitor: Supplies power to nvSRAM during power loss to store data from
SRAM to nonvolatile storage elements.
Ground
Unlabeled pins have no internal connections.
Document Control #ML0022 Rev 2.1
2
Jan, 2008
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