Datasheet

Low-Current, SPI-Compatible
Real-Time Clock
2 Maxim Integrated
DS1347
ABSOLUTE MAXIMUM RATINGS
DC ELECTRICAL CHARACTERISTICS
(V
CC
= +2.0V to +5.5V, T
A
= -40°C to +85°C. Typical values are at V
CC
= +3.3V, T
A
= +25°C, unless otherwise noted.) (Note 1)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
V
CC
to GND..............................................................-0.3V to +6V
All Other Pins to GND ................................-0.3V to (V
CC
+ 0.3V)
Current into Any Pin..........................................................±20mA
Rate of Rise, V
CC
............................................................100V/µs
Continuous Power Dissipation (T
A
= +70°C)
TDFN (derate 24.4mW/°C above +70°C)...................1.375mW
Junction Temperature .....................................................+150°C
Storage Temperature Range…………………… -55°C to +125°C
ESD Protection (All Pins, Human Body Model)................±2000V
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow) .......................................+260°C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Operating Voltage
Range
V
CC
2 5.5 V
V
CC
= +2V 0.1
Active Supply Current
(Note 2)
I
CC
V
CC
= +5V 0.25
mA
V
CC
= +2V 0.35 0.7
V
CC
= +3.6V 0.35 0.7
Timekeeping Supply
Current (Note 3)
I
TK
V
CC
= +5V 0.4 0.8
μA
SPI DIGITAL INPUTS (SCLK, DIN, CS)
V
CC
= +2V 1.4
Input High Voltage V
IH
V
CC
= +5V 2.2
V
V
CC
= +2V 0.6
Input Low Voltage V
IL
V
CC
= +5V 0.8
V
Input Leakage Current I
IL
V
IN
= 0 to V
CC
-0.1 +0.1 μA
Input Capacitance C
IN
(Note 4) 10 pF
SPI DIGITAL OUTPUT (DOUT)
Output Leakage Current I
O
CS = V
IH
-0.1 +0.1 μA
Output Capacitance C
OUT
(Note 4) 15 pF
V
CC
= +2V, I
SINK
= 1.5mA 0.4
Output Low Voltage V
OL
V
CC
= +5V, I
SINK
= 4mA 0.4
V
V
CC
= +2V, I
SOURCE
= -0.4mA 1.8
Output High Voltage V
OH
V
CC
= +5V, I
SOURCE
= -1mA 4.5
V