DS14285 Datasheet, PDF (17/25 Pages) Dallas Semiconductor – Real Time Clock with NV RAM Control

DS14285/DS14287
ABSOLUTE MAXIMUM RATINGS*
Voltage on Any Pin Relative to Ground
-0.5V to +7.0V
Storage Temperature
-40°C to +85°C
Soldering Temperature
DIP: 260°C for 10 seconds (See Note 12)
See IPC/JEDEC Standard J-STD-020A for Surface Mount
Devices
* This is a stress rating only and functional operation of the device at these or any other conditions above
those indicated in the operation sections of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods of time may affect reliability.
Operating Range
Range
Commercial
Industrial
Temperature
0°C to +70°C
-40°C to +85°C
Vcc
5V ±10%
5V ±10%
RECOMMENDED DC OPERATING CONDITIONS Over the operating range
PARAMETER
SYMBOL MIN TYP MAX UNITS NOTES
Power Supply Voltage
Battery Voltage
V_CC
4.5
5.0
5.5
V
1
Vbat
2.5
3.6
V
1
Input Logic 1
Input Logic 0
V_IH
2.2
V_IL
-0.3
V_CC+0.3 V
1
+0.8
V
1
DC ELECTRICAL CHARACTERISTICS Over the operating range
PARAMETER
SYMBOL MIN TYP MAX
Power Supply Current
Oscillator Current
Input Leakage
I_CC1
7
15
I_OSC
300 500
I_IL
-1.0
+1.0
I/O Leakage
I_LO
-1.0
+1.0
MOT Input Current
I_MOT
-1.0
+500
CEI Input Current
I CEI
-1.0
200
CEI to CEO Impedance
Z_CE
60
Output @ 2.4V
Output @ 0.4V
Write-Protect Voltage
V_CCO Voltage
V_CCO Voltage
I_OH
-1.0
I_OL
4.0
V_TP
4.0
4.25 4.5
V_CCO1
V_CC-0.3V
V_CCO2 V_BAT-0.3V
UNITS
mA
nA
µA
µA
µA
µA
Ω
mA
mA
V
V
V
NOTES
2
3
5
3
4
11
1, 6
1
7
8
CAPACITANCE
PARAMETER
Input Capacitance
Output Capacitance
SYMBOL
C_IN
C_OUT
MIN
(t_A = 25°C)
TYP MAX UNITS NOTES
5
pF
7
pF
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