DS1230AB-100-IND DALLAS [Dallas Semiconductor], DS1230AB-100-IND Datasheet - Page 8

• Manufacturer Part Number: DS1230AB-100-IND
• Description: 256k Nonvolatile SRAM
• Manufacturer: DALLAS [Dallas Semiconductor]

POWER-DOWN/POWER-UP TIMING
WARNING:
Under no circumstance are negative undershoots, of any amplitude, allowed when device is in battery
backup mode.
NOTES:
1.
2.
3. t
4. t
5. These parameters are sampled with a 5 pF load and are not 100% tested.
6. If the
7. If the
8. If
9. Each DS1230Y has a built-in switch that disconnects the lithium source until V
10. All AC and DC electrical characteristics are valid over the full operating temperature range. For
11. In a power-down condition the voltage on any pin may not exceed the voltage on V
12. t
13. t
14. DS1230 DIP modules are recognized by Underwriters Laboratory (U.L. ) under file E99151.
PARAMETER
CE, at V
V
V
PARAMETER
Expected Data Retention Time
CE
CC
CC
going low to the earlier of
buffers remain in a high-impedance state during this period.
buffers remain in high-impedance state during this period.
the output buffers remain in a high-impedance state during this period.
the user. The expected t
time power is first applied by the user.
commercial products, this range is 0 C to 70 C. For industrial products (IND), this range is -40 C to
+85 C.
DS1230 PowerCap modules are pending U.L. review. Contact the factory for status.
OE
WE
WP
DH
WR1
WR2
at V
slew from V
slew from 0V to V
WE
, t
is specified as the logical AND of
= V
is high for a Read Cycle.
and t
and t
DS
IH
IH
CE
CE
is low or the
are measured from the earlier of
IH
after Power-Up
before Power-Down
DH1
DH2
or V
low transition occurs simultaneously with or latter than the
high transition occurs prior to or simultaneously with the
are measured from
are measured from
TP
IL
. If
to 0V (
OE
TP
WE
(
= V
CE
CE
DR
low transition occurs prior to or simultaneously with the
CE
IH
is defined as accumulative time in the absence of V
at V
at V
during write cycle, the output buffers remain in a high-impedance state.
or
IH
IH
CE
WE
WE
)
)
going high.
going high.
going high.
SYMBOL
SYMBOL
CE
CE
t
t
t
REC
and
or
t
t
DR
8 of 12
PD
F
R
WE
WE
going high.
. t
MIN
MIN
300
300
WP
10
0
2
is measured from the latter of
TYP
TYP
WE
WE
MAX
MAX
125
high transition, the output
low transition, the output
(t
CC
A
CC
UNITS
UNITS
: See Note 10)
CC
CE
years
is first applied by
ms
starting from the
.
s
s
s
low transition,
(t
DS1230Y/AB
CE
A
NOTES
NOTES
=25 C)
or
11
9
WE