参数资料
型号: STK17TA8RF25I
元件分类: 时钟/数据恢复及定时提取
英文描述: REAL TIME CLOCK, PDSO48
封装: 0.300 INCH, 0.025 INCH PITCH, ROHS COMPLIANT, PLASTIC, SSOP-48
文件页数: 26/27页
文件大小: 712K
代理商: STK17TA8RF25I
STK17TA8
July 2006
Document Control #ML0025 rev 1.4
8
AutoStore /POWER-UP RECALL
SYMBOLS
PARAMETER
STK17TA8
NO.
Standard
Alternate
MIN
MAX
UNITS
NOTES
22
tHRECALL
Power-up RECALL Duration
40
ms
i
23
tSTORE
tHLHZ
STORE Cycle Duration
12.5
ms
j
,k
24
VSWITCH
Low Voltage Trigger Level
2.65
V
25
tVCCRISE
VCC Rise Time
150
s
Notes
i: tHRECALL starts from the time VCC rises above VSWITCH
j: If an SRAM WRITE has not taken place since the last nonvolatile cycle, no STORE will take place
k: Industrial Grade Devices require 15ms MAX.
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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