DS1340-18_03 查看數據表（PDF） - Dallas Semiconductor -> Maxim Integrated
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DS1340-18_03 Datasheet PDF : 12 Pages
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2-Wire RTC with Trickle Charger
RECOMMENDED DC OPERATING CONDITIONS
(VCC = VCC MIN to VCC MAX, TA = -40°C to +85°C, unless otherwise noted. Typical values are at VCC = 3.3V, TA = +25°C, unless
otherwise noted.) (Note 1)
PARAMETER
Supply Voltage (Note 8)
Input Logic 1 (SDA, SCL)
Input Logic 0 (SDA, SCL)
Supply Voltage, Pullup (FT/OUT)
Backup Supply Voltage (Note 8)
Trickle-Charge Current-Limiting
Resistors
Power-Fail Voltage (Note 8)
Input Leakage (SCL, CLK)
I/O Leakage (SDA, FT/OUT)
SDA Logic 0 Output
FT/OUT Logic 0 Output
Active Supply Current (Note 13)
Standby Current (Note 14)
VBACKUP Leakage Current
SYMBOL
CONDITIONS
DS1340-18
VCC
DS1340-3
DS1340-33
VIH
(Note 8)
VIL
(Note 8)
VIH
(Note 8)
DS1340-18
VBACKUP DS1340-3
DS1340-33
R1
(Notes 9, 10)
R2
(Note 11)
R3
(Note 12)
DS1340-18
VPF
DS1340-3
DS1340-33
ILI
ILO
IOLSDA
VCC > 2V; VOL = 0.4V
1.7V < VCC < 2V; VOL = 0.2 x VCC
IOLSQW
VCC > 2V; VOL = 0.4V
1.7V < VCC < 2V; VOL = 0.2 x VCC
1.3V < VCC < 1.7V; VOL = 0.2x VCC
DS1340-18
ICCA
DS1340-3
DS1340-33
DS1340-18
ICCS
DS1340-3
DS1340-33
IBACKUPLKG VBACKUP = 3.7V
MIN TYP MAX
1.71
1.8
1.89
2.7
3.0
3.3
2.97
3.3
5.5
0.7 x VCC
-0.3
VCC + 0.3
+0.3 x VCC
5.5
1.3
3.7
1.3
3.7
1.3
5.5
250
2000
4000
1.51
1.6
1.71
2.45
2.6
2.7
2.70 2.88 2.97
-1
+1
-1
+1
3.0
3.0
3.0
3.0
250
72
150
108
200
192
300
60
100
81
125
100
150
100
UNITS
V
V
V
V
V
Ω
V
µA
µA
mA
mA
µA
µA
µA
nA
DC ELECTRICAL CHARACTERISTICS
(VCC = 0V, VBACKUP = 3.7V, TA = -40°C to +85°C, unless otherwise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
IBACKUP1 OSC ON, FT = 0 (Note 15)
Oscillator Current
IBACKUP2
IBACKUP3
OSC ON, FT = 1 (Note 15)
OSC ON, FT = 0, VBACKUP = 3.0V,
TA = +25°C (Notes 15, 16)
VBACKUP Data-Retention Current IBACKUPDR OSC OFF
MIN TYP MAX UNITS
800 1150
850 1250
nA
800 1000
25.0 100
nA
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