DS17885 Dallas, DS17885 Datasheet - Page 30

• Manufacturer Part Number: DS17885
• Description: (DS17886 / DS17887) 3V/5V Real-Time Clock
• Manufacturer: Dallas

POWER-UP/POWER-DOWN TIMING, 5V
POWER-UP/POWER-DOWN TIMING, 3V
Warning: Under no circumstances are negative undershoots, of any amplitude, allowed when device is
in battery back-up mode.
CAPACITANCE
WAKE-UP/KICKSTART TIMING
Recovery at Power-Up
V
V
V
Expected Data Retention
Recovery at Power-Up
V
V
Expected Data Retention
Input Capacitance
Output Capacitance
Kickstart-Input Pulse-Width
Wake-up/Kickstart Power-On
Timeout
CS
CS
CC
CC
CC
CC
CC
High to Power-Fail
High to Power-Fail
Slew Rate Power-Down
Slew Rate Power-Down
Slew Rate Power-Up
Slew Rate Power-Down
Slew Rate Power-Up
PARAMETER
PARAMETER
PARAMETER
PARAMETER
4.5 ³ V
3.0 ³ V
4.0
3.0
2.5
SYMBOL
SYMBOL
SYMBOL
SYMBOL
£
£
£
t
C
t
V
V
V
KSPW
POTO
C
t
t
OUT
t
t
t
t
REC
t
REC
CC
CC
CC
CC
CC
t
t
IN
t
DR
t
DR
FB
PF
PF
R
R
F
F
£
£
£
³ 4.0V
³ 2.5V
4.5V
4.0V
3.0V
30 of 38
MIN
MIN
MIN
MIN
2
2
300
300
10
10
10
0
0
TYP
TYP
TYP
TYP
150
150
MAX
MAX
MAX
MAX
12
12
0
0
UNITS
UNITS
UNITS
UNITS
years
years
ms
ms
pF
pF
ns
ms
ms
ms
ns
ms
ms
ms
s
(T
(T
(T
(T
A
A
A
A
= +25°C)
= +25°C)
= +25°C)
= +25°C)
NOTES
NOTES
NOTES
NOTES
9, 10
9, 10
7