DS1347 Maxim, DS1347 Datasheet - Page 3

• Manufacturer Part Number: DS1347
• Description: The DS1347 SPI-compatible real-time clock (RTC) contains a real-time clock/calendar and 31 x 8 bits of static random-access memory (SRAM)
• Manufacturer: Maxim

AC ELECTRICAL CHARACTERISTICS
(V
(Figure 5, Notes 1, 5)
CRYSTAL CHARACTERISTICS
Note 1: All parameters are 100% tested at T
Note 2: I
Note 3: Timekeeping current is specified with CS = V
Note 4: Guaranteed by design and not 100% production tested.
Note 5: All values referred to V
SPI SERIAL TIMING
Input Rise Time
Input Fall Time
Output Rise Time
Output Fall Time
SCLK Period
SCLK High Time
SCLK Low Time
SCLK Fall to DOUT
Valid
DIN to SCLK Setup
Time
DIN to SCLK Hold
Time
SCLK Rise to
Rise Hold Time
High Impedance
Time
Nominal Frequency
Series Resistance
Load Capacitance
CC
High Pulse Width
High to DOUT
to SCLK Setup
Low-Current, SPI-Compatible Real-Time Clock
PARAMETER
PARAMETER
= +2.0V to +5.5V, T
not production tested.
CC
is specified with DOUT open, CS = DIN = GND, SCLK = 4MHz at V
_______________________________________________________________________________________
SYMBOL
SYMBOL
A
t
t
t
t
t
t
rOUT
fOUT
ESR
CSW
t
t
t
t
t
CSH
t
t
t
CSZ
CSS
C
rIN
CH
DO
DH
f
fIN
CP
CL
DS
= -40°C to +85°C. Typical values are at V
O
IH(MIN)
L
and V
DIN, SCLK,
DIN, SCLK,
DOUT, C
DOUT, C
V
V
V
V
V
V
CC
CC
CC
CC
CC
CC
= +2V
= +5V
= +2V, C
= +5V, C
= +2V
= +5V
A
IL(MAX)
= +25°C. Limits over temperature are guaranteed by design and characterization and
LOAD
LOAD
levels.
LOAD
LOAD
= 100pF
= 100pF
CC
, SCLK = DIN = GND, DOSF = 0, EGFIL = 1.
CONDITIONS
CONDITIONS
= 100pF
= 100pF
CC
CC
= +3.3V, T
= +5V; SCLK = 1MHz at V
1000
A
MIN
238
100
100
100
200
200
100
MIN
20
50
= +25°C, unless otherwise noted.)
32.768
TYP
TYP
12.5
10
10
5
5
CC
= +2.0V.
MAX
MAX
300
100
100
100
UNITS
UNITS
kHz
k
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
pF
3