DS1375 Datasheet, PDF (2/11 Pages) Dallas Semiconductor – 2-Wire Digital Input RTC with Alarm

2-Wire Digital Input RTC with Alarm
ABSOLUTE MAXIMUM RATINGS
Voltage Range on V_CC Pin
Relative to Ground.............................................-0.3V to +6.0V
Voltage Range on SDA, SCL, and WDS
Relative to Ground ....................................-0.3V to V_CC + 0.3V
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range .............................-55°C to +125°C
Soldering Temperature .......................................See IPC/JEDEC
J-STD-020A Specification
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.
RECOMMENDED DC OPERATING CONDITIONS
(V_CC = +1.7V to +5.5V, T_A = -40°C to +85°C, unless otherwise noted. Typical values are at V_CC = 3.3V, T_A = +25°C, unless other-
wise noted.) (Note 1)
PARAMETER
Supply Voltage
Timekeeping Voltage
Input Logic 1 (SDA, SCL)
Supply Voltage, Pullup
(SQW/INT, CLK)
SYMBOL
V_CC
V_TK
V_IH
(Note 2)
(Note 2)
(Note 2)
CONDITIONS
V_PULLUP (Notes 2, 3)
MIN TYP MAX
1.7
3.3
5.5
1.3
5.5
0.7 x V_CC
V_CC + 0.3
UNITS
V
V
V
5.5
V
Input Logic 0
Input Leakage (SCL, CLK)
I/O Leakage (SDA, SQW/INT)
SDA Logic 0 Output
SQW/INT Logic 0 Output
Active Supply Current
Standby Current
V_IL
(Notes 2, 4)
I_LI
I_LO
I_OLSDA
I_OLSQW
I_CCA
I_CCS
V_CC > 2V; V_OL = 0.4V
V_CC < 2V; V_OL = 0.2 x V_CC
V_CC > 2V; V_OL = 0.4V
1.7V < V_CC < 2V; V_OL = 0.2 x V_CC
1.3V < V_CC < 1.7V; V_OL = 0.2 x V_CC
(Notes 5, 6)
(Notes 6, 7)
-0.3
+0.3
V_CC
V
-1
+1
µA
-1
+1
µA
3.0
mA
3.0
mA
250
µA
33
150
µA
150
500
nA
Note 1:
Note 2:
Note 3:
Note 4:
Note 5:
Note 6:
Note 7:
Limits at -40°C are guaranteed by design and not production tested.
All voltages are referenced to ground.
For the CLK pin, input voltages above V_CC + 0.3V cause current to flow into the device. The input current must not
exceed the current drawn by the circuit that is connected to V_CC. Otherwise, current flows out of the DS1375, raising the
voltage level on the V_CC bus.
V_{IL MIN} on the CLK pin can exceed -0.3V as long as the current is limited to less than 1mA.
I_CCA—SCL clocking at max frequency = 400kHz.
CLK pin running at 32,768Hz, rise and fall times at 10ns or less.
Specified with 2-wire bus inactive.
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