Datasheet
DS1302 Trickle-Charge Timekeeping Chip
10 of 13
ABSOLUTE MAXIMUM RATINGS
Voltage Range on Any Pin Relative to Ground……………………………………………………………….-0.5Vto +7.0V
Operating Temperature Range, Commercial………………………………………………………………….0°C to +70°C
Operating Temperature Range, Indu
strial (IND)…………………………………
…………………………-40°C to +85°C
Storage Temperature Range……………………………………………………………………………..….-55°C to +125°C
Soldering Temperature (leads, 10 seconds)………………………………………………………………..………….260°C
Soldering Temperature (surface mount)……………
…………………………………..…….See IPC/JEDEC J-STD-020
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 the absolute maximum rating conditions for extended periods may affect device reliability.
RECOMMENDED DC OPERATING CONDITIONS
(T
A
= 0°C to +70°C or T
A
= -40°C to +85°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Supply Voltage V
CC1
, V
CC2
V
CC1,
V
CC2
(Notes 2, 10) 2.0 3.3 5.5 V
Logic 1 Input V
IH
(Note 2) 2.0
V
CC
+
0.3
V
V
CC
= 2.0V -0.3 +0.3
Logic 0 Input V
IL
V
CC
= 5V
(Note 2)
-0.3 +0.8
V
DC ELECTRICAL CHARACTERISTICS
(T
A
= 0°C to +70°C or T
A
= -40°C to +85°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Input Leakage I
LI
(Notes 5, 13) 85 500
μA
I/O Leakage I
LO
(Notes 5, 13) 85 500
μA
Logic 1 Output (I
OH
= -0.4mA) V
CC
= 2.0V 1.6
Logic 1 Output (I
OH
= -1.0mA)
V
OH
V
CC
= 5V
(Note 2)
2.4
V
Logic 0 Output (I
OL
= 1.5mA) V
CC
= 2.0V 0.4
Logic 0 Output (I
OL
= 4.0mA)
V
OL
V
CC
= 5V
(Note 2)
0.4
V
V
CC1
= 2.0V 0.4
Active Supply Current
(Oscillator Enabled)
I
CC1A
V
CC1
= 5V
CH = 0
(Notes 4, 11)
1.2
mA
V
CC1
= 2.0V 0.2 0.3
Timekeeping Current
(Oscillator Enabled)
I
CC1T
V
CC1
= 5V
CH = 0
(Notes 3, 11,13)
0.45 1
μA
V
CC1
= 2.0V 1 100
V
CC1
= 5V 1 100
Standby Current (Oscillator
Disabled)
I
CC1S
IND
CH = 1
(Notes 9, 11, 13)
5 200
nA
V
CC2
= 2.0V 0.425
Active Supply Current
(Oscillator Enabled)
I
CC2A
V
CC2
= 5V
CH = 0
(Notes 4, 12)
1.28
mA
V
CC2
= 2.0V 25.3
Timekeeping Current
(Oscillator Enabled)
I
CC2T
V
CC2
= 5V
CH = 0
(Notes 3, 12)
81
μA
V
CC2
= 2.0V
CH = 1
(Notes 9, 12)
25
Standby Current (Oscillator
Disabled)
I
CC2S
V
CC2
= 5V 80
μA
R1
2
R2
4
Trickle-Charge Resistors
R3
8
kΩ
Trickle-Charge Diode Voltage
Drop
V
TD
0.7 V