Cypress CY14B256L - Manual (Page 17)

CY14B256L
Document Number: 001-06422 Rev. *H Page 17 of 18
Document History Page
Document Title: CY14B256L 256 Kbit (32K x 8) nvSRAM
Document Number: 001-06422
Rev. ECN No.
Submission
Date
Orig. of
Change
Description of Change
** 425138 See ECN TUP New data sheet
*A 437321 See ECN TUP Show data sheet on External Web
*B 471966 See ECN TUP Changed V
IH(min)
from 2.2V to 2.0V
Changed t
RECALL
from 60
μs to 50 μs
Changed Endurance from one million cycles to 500K cycles
Changed Data Retention from 100 years to 20 years
Added Soft Sequence Processing Time Waveform
Updated Part Numbering Nomenclature and Ordering Information
*C 503277 See ECN PCI Changed from “Advance” to “Preliminary”
Changed the term “Unlimited” to “Infinite”
Changed endurance from 500K cycles to 200K cycles
Device operation: Tolerance limit changed from + 20% to + 15% in the
Features Section and Operating Range Table
Removed Icc
1
values from the DC table for 25 ns and 35 ns industrial grade
Changed V
SWITCH(min)
from 2.55V to 2.45V
Added temperature specification to data retention - 20 years at 55
°C
Changed the max value of Vcap storage capacitor from 120
μF to 57 μF
Updated Part Nomenclature Table and Ordering Information Table
*D 597004 See ECN TUP Removed V
SWITCH(min)
specification from the AutoStore/Power Up RECALL
table
Changed t
GLAX
specification from 20 ns to 1 ns
Added t
DELAY(max)
specification of 70
μs in the Hardware STORE Cycle table
Removed t
HLBL
specification
Changed t
SS
specification from 70
μs (min) to 70 μs (max)
Changed V
CAP(max)
from 57
μF to 120 μF
*E 696097 See ECN VKN Added footnote 6 related to HSB. Changed t
GLAX
to t
GHAX
*F 1349963 See ECN SFV Changed from Preliminary to Final. Updated Ordering Information Table
*G 2483006 See ECN GVCH/PYRS Changed tolerance from +15%, -10% to +20%, -10%
Changed Operating voltage range from 2.7V-3.45V to 2.7V-3.6V.
*H 2625139 01/30/09 GVCH/PYRS Updated “features”
Updated WE pin description
Added data retention at 55
o
C
Added best practices
Added I
CC1
spec for 25ns and 35ns access speed for industrial temperate
Updated V
IH
from Vcc+0.3 to Vcc+0.5
Removed footnote 4 and 5
Added Data retention and Endurance Table
Added Thermal resistance values
Changed parameter t
AS
to t
SA
Changed t
RECALL
from 50us to 120us (Including t
ss
of 70us)
Renamed t
GLAX
to t
HA
Updated Figure 11 and 12
Renamed t
HLHX
to t
PHSB
Updated Figure 12 and 13
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