DS1672 Datasheet, PDF (8/13 Pages) Dallas Semiconductor – Low Voltage Serial Timekeeping Chip

ABSOLUTE MAXIMUM RATINGS*
Voltage on Any Pin Relative to Ground
Operating Temperature
Storage Temperature
Soldering Temperature
-0.3V to +6.0V
-40°C to +85°C
-55°C to +125°C
See J-STD-020A specification
DS1672
* 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.
RECOMMENDED DC OPERATING CONDITIONS
PARAMETER
SYMBOL MIN
TYP
Supply Voltage (DS1672-33)
V_CC
2.97
3.3
(DS1672-3)
V_CC
2.7
3.0
(DS1672-2)
V_CC
1.8
2.0
Logic 1
V_IH
0.7V_CC
Logic 0
V_IL
-0.5
Backup Supply Voltage
V_BACKUP
1.3
(-40°C to +85°C)
MAX UNITS NOTES
3.63
V
1
3.3
V
1
2.2
V
1
V_CC + 0.5
V
1
0.3V_CC
V
1
3.6
V
1
DC ELECTRICAL CHARACTERISTICS
DS1672-33
PARAMETER
(-40°C to +85°C; V_CC = 2.97 to 3.63V)
SYMBOL MIN
TYP
MAX UNITS NOTES
Active Supply Current
I_CCA
Standby Current
I_CCS
2
mA
7
500
µA
8
Power-Fail Voltage
V_PF
2.80
2.88
2.97
V
1
DC ELECTRICAL CHARACTERISTICS
DS1672-3
PARAMETER
SYMBOL MIN
Active Supply Current
Standby Current
Power-Fail Voltage
I_CCA
I_CCS
V_PF
2.5
(-40°C to +85°C; V_CC = 2.7 to 3.3V)
TYP
MAX UNITS NOTES
2
mA
7
500
µA
9
2.6
2.7
V
1
DC ELECTRICAL CHARACTERISTICS
DS1672-2
PARAMETER
SYMBOL MIN
Active Supply Current
I_CCA
Standby Current
I_CCS
Power-Fail Voltage
V_PF
1.6
(-40°C to +85°C; V_CC = 1.8 to 2.2V)
TYP
MAX UNITS NOTES
2
mA
7
500
µA
10
1.7
1.8
V
1
DC ELECTRICAL CHARACTERISTICS
PARAMETER
SYMBOL MIN
Timekeeping Current
I_OSC
Backup Standby Current
(Oscillator Off)
I_BACKUP
(-40°C to +85°C; V_CC < V_PF)
TYP
MAX UNITS NOTES
1
µA
12
200
nA
13
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