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參數(shù)資料
| 型號： | STK17TA8-W25 |
| 元件分類： | 時鐘/數(shù)據(jù)恢復及定時提取 |
| 英文描述： | REAL TIME CLOCK, PDIP40 |
| 封裝： | 0.600 INCH, 0.100 INCH PITCH, PLASTIC, DIP-40 |
| 文件頁數(shù)： | 25/25頁 |
| 文件大小： | 285K |
| 代理商： | STK17TA8-W25 |
STK17TA8
April 2005
Document Control #ML0025 rev 1.1
9
AutoStore /POWER-UP RECALL
SYMBOLS
PARAMETER
STK17TA8
NO.
Standard
Alternate
MIN
MAX
UNITS
NOTES
22
tHRECALL
Power-up RECALL Duration
20
ms
l
23
tSTORE
tHLHZ
STORE Cycle Duration
12.5
ms
m
24
VSWITCH
Low Voltage Trigger Level
2.55
2.65
V
25
tVCCRISE
VCC Rise Time
150
s
Notes
l: tHRECALL starts from the time VCC rises above VSWITCH
m: If an SRAM WRITE has not taken place since the last nonvolatile cycle, no STORE will take place
AutoStore/POWER-UP RECALL
Note: Read and Write cycles will be ignored during STORE, RECALL and while VCC is below VSWITCH.
POWER-UP RECALL
VCC
23
tSTORE
22
tHRECALL
24
VSWITCH
AutoStore
TM
POWER DOWN
AutoStore
TM
BROWN OUT
AutoStore
TM
POWER-UP
RECALL
Read & Write Inhibited
25
tVCCRISE
23
tSTORE
22
tHRECALL
POWER-UP
RECALL
STORE
occurs only if a
SRAM write has
happened.
No STORE occurs
without at least one
SRAM write.
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