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STK14D88-RF25TR датащи(PDF) 2 Page - Simtek Corporation

номер детали STK14D88-RF25TR
подробное описание детали  32Kx8 Autostore nvSRAM
Download  19 Pages
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производитель  SIMTEK [Simtek Corporation]
домашняя страница  http://www.simtek.com
Logo SIMTEK - Simtek Corporation

STK14D88-RF25TR датащи(HTML) 2 Page - Simtek Corporation

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2
February 2007
Document Control #ML0033 Rev 1.7
STK14D88
PIN DESCRIPTIONS
Pin Name
I/O
Description
A14-A0
Input
Address: The 15 address inputs select one of 32,768 bytes in the nvSRAM array
DQ7-DQ0
I/O
Data: Bi-directional 8-bit data bus for accessing the nvSRAM
E
Input
Chip Enable: The active low E input selects the device
W
Input
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
G
Input
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.
VCC
Power Supply
Power: 3.0V, +20%, -10%
HSB
I/O
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).
VCAP
Power Supply
Autostore Capacitor: Supplies power to nvSRAM during power loss to store data from
SRAM to nonvolatile storage elements.
VSS
Power Supply
Ground
(Blank)
No Connect
Unlabeled pins have no internal connections.
Relative PCB area usage.
See website for detailed package
size specifications.
48 Pin SSOP
VCAP
VSS
A14
A12
A7
A6
A5
A4
VCC
A13
A8
DQ0
VSS
DQ6
A9
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
W
HSB
DQ1
DQ2
G
A3
A2
A1
A0
DQ5
A10
DQ7
DQ4
DQ3
VCC
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
E
A11
VCAP
DQ0
DQ1
DQ2
G
A14
A12
A7
A6
A5
A4
A3
A2
A1
A0
VCC
A13
A8
A11
VSS
DQ6
A10
DQ7
DQ5
DQ4
DQ3
A9
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
W
HSB
E
32 Pin SOIC


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