DS1217 DALLAS [Dallas Semiconductor], DS1217 Datasheet - Page 7

• Manufacturer Part Number: DS1217
• Description: Nonvolatile Read/Write Cartridge
• Manufacturer: DALLAS [Dallas Semiconductor]

POWER-DOWN/POWER-UP CONDITION
POWER-DOWN/POWER-UP TIMING
WARNING:
Under no circumstances are negative undershoots, of any amplitude, allowed when the device is in battery backup
mode.
LEAKAGE CURRENT
I
LITHIUM CELL
L
SUPPLIED FROM
SYM
SYM
t
t
DR
t
REC
PD
t
t
R
F
V
4.50V
CE at V
V
V
CE at V
CE
CC
CC
CC
Expected Data Retention Time
Slew from 4.5V to 0V (CE at V
Slew from 0V to 4.5V (CE at V
IH
IH
3.2V
before Power-Down
after Power-Up
t
F
PARAMETER
PARAMETER
t
PD
IH
IH
)
)
DATA RETENTION TIME
MIN
MIN
t
100
DR
10
0
0
2
MAX
MAX
125
UNITS
UNITS
years
ms
s
s
s
t
REC
(0 C to 70 C)
(t
NOTES
NOTES
t
A
R
030598 7/8
DS1217A
= 25 C)
10
10
9