STK14C88-LF45TR データシートの表示（PDF） - Cypress Semiconductor

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STK14C88-LF45TR

32Kx8 AutoStore nvSRAM

Cypress Semiconductor 

STK14C88

AutoStore/Power up RECALL

Symbols

NO.

Standard

Alt.

Parameter

STK14C88

Unit

Min

Max

27 tRESTORE

Power up RECALL Duration

–

28

tSTORE

tHLHZ

STORE Cycle Duration

–

29

tVSBL

Low Voltage Trigger (VSWITCH) to HSB

–

Low

550

s

10

ms

300

ns

30

tDELAY

31 VSWITCH

32 VRESET

tBLQZ

VCC

Time Allowed to Complete SRAM

1

Cycle

Low Voltage Trigger Level

4.0

Low Voltage Reset Level

–

Figure 9. AutoStore/POWER UP RECALL

–

s

s 4.5

V

Design 3.6

V

31

VSWITCH

ew 27

VRESET

d for N AutoStore

nde POWER UP RECALL

e HSB

28

tRESTORE

mm W

Not Reco DQ (DATA OUT)

30

tVSBL

31

tDELAY

29

tSTORE

POWER UP

RECALL

BROWN OUT

NO STORE

(NO SRAM Writes)

BROWN OUT

AutoStore

BROWN OUT

AutoStore

NO RECALL

(VCC DID NOT GO

BELOW VRESET)

NO RECALL

(VCC DID NOT GO

BELOW VRESET)

RECALL WHEN

VCC RETURNS

ABOVE VSWITCH

Notes

15

13, 16

11

13

–

–

Notes

15. tRESTORE starts from the time VCC rises above VSWITCH.

16. HSB is asserted low for 1s 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.

Document Number: 001-52038 Rev. *C

Page 9 of 20

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