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STK12C68-5C55M Datasheet(PDF) 11 Page - Cypress Semiconductor

Part No. STK12C68-5C55M
Description  64 Kbit (8K x 8) AutoStore nvSRAM
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Maker  CYPRESS [Cypress Semiconductor]
Homepage  http://www.cypress.com
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STK12C68-5 (SMD5962-94599)
Document Number: 001-51026 Rev. **
Page 11 of 18
AutoStore or Power Up RECALL
Parameter
Alt
Description
STK12C68-5
Unit
Min
Max
tHRECALL
[13]
tRESTORE
Power up RECALL Duration
550
μs
tSTORE
[14, 15, 16]
tHLHZ
STORE Cycle Duration
10
ms
tDELAY
[9, 15]
tHLQZ , tBLQZ
Time Allowed to Complete SRAM Cycle
1
μs
VSWITCH
Low Voltage Trigger Level
4.0
4.5
V
VRESET
Low Voltage Reset Level
3.9
V
tVCCRISE
VCC Rise Time
150
μs
tVSBL
[11]
Low Voltage Trigger (VSWITCH) to HSB Low
300
ns
Switching Waveform
Figure 12. AutoStore/Power Up RECALL
WE
Notes
13. tHRECALL starts from the time VCC rises above VSWITCH.
14. CE and OE low for output behavior.
15. CE and OE low and WE high for output behavior.
16. HSB is asserted low for 1us when VCAP drops through VSWITCH. If an SRAM Write has not taken place since the last nonvolatile cycle, HSB is released and no store
takes place.
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