DS1343 Maxim, DS1343 Datasheet - Page 4

• Manufacturer Part Number: DS1343
• Description: The DS1343/DS1344 low-current real-time clocks (RTCs) are timekeeping devices that provide an extremely low standby current, permitting longer life from a backup supply source
• Manufacturer: Maxim

Low-Current SPI/3-Wire RTCs
POWER-UP/DOWN_CHARACTERISTICS
(T
CAPACITANCE
(T
CRYSTAL_PARAMETERS
Note_2: Voltage referenced to ground.
Note_3: Limits at T
Note_4: CE = V
Note_5: CE = GND, I
Note_6: V
Note_7: V
Note_8: Applies to INT0 and INT1.
Note_9: The parameter t
Note_10: Guaranteed by design; not 100% production tested.
4
Recovery at Power-Up
V
V
Input Capacitance
Output Capacitance
Nominal Frequency
Series Resistance
Load Capacitance
A
A
CC
CC
= -40°C to +85°C, unless otherwise noted.)
= +25°C, unless otherwise noted.)
Fall Time (V
Rise Time (0V to V
CC
CC
PARAMETER
PARAMETER
PARAMETER
= 0V, EGFIL = 0, DOSF = 1.
= 0V, EGFIL = 1, DOSF = 0.
CC
PF
, V
A
to 0V)
= -40°C are guaranteed by design and not production tested.
SCLK
OUT
PF
OSF
= 0mA, EOSC = EGFIL = DOSF = 0, trickle charger disabled.
)
= V
is the period of time the oscillator must be stopped for the OSF flag to be set.
CC
to GND, I
SYMBOL
SYMBOL
SYMBOL
t
t
t
VCCF
VCCR
ESR
REC
C
C
C
f
O
O
L
I
OUT
= 0mA, trickle charger disabled.
(Note 10)
(Note 10)
DS1343
DS1344
CONDITIONS
CONDITIONS
CONDITIONS
MIN
MIN
MIN
150
0
32.768
TYP
TYP
TYP
12.5
20
10
15
6
MAX
MAX
MAX
100
40
UNITS
UNITS
UNITS
kHz
ms
kI
Fs
Fs
pF
pF
pF