Recommended dc operating conditions, Dc electrical characteristics – Rainbow Electronics DS1340 User Manual
Page 3
DS1340
2-Wire RTC with Trickle Charger
_____________________________________________________________________
3
RECOMMENDED DC OPERATING CONDITIONS
(V
CC
= V
CC MIN
to V
CC MAX
, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at V
CC
= 3.3V, T
A
= +25°C, unless
otherwise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
DS1340-18
1.71
1.8
1.89
DS1340-3
2.7
3.0
3.3
Supply Voltage (Note 8)
V
CC
DS1340-33
2.97
3.3
5.5
V
Input Logic 1 (SDA, SCL)
V
IH
(Note 8)
0.7 x V
CC
V
CC
+ 0.3
V
Input Logic 0 (SDA, SCL)
V
IL
(Note 8)
-0.3
+0.3 x V
CC
V
Supply Voltage, Pullup (FT/OUT)
V
IH
(Note 8)
5.5
V
DS1340-18
1.3
3.7
DS1340-3
1.3
3.7
Backup Supply Voltage (Note 8)
V
BACKUP
DS1340-33
1.3
5.5
V
R1
(Notes 9, 10)
250
R2
(Note 11)
2000
Trickle-Charge Current-Limiting
Resistors
R3
(Note 12)
4000
Ω
DS1340-18
1.51
1.6
1.71
DS1340-3
2.45
2.6
2.7
Power-Fail Voltage (Note 8)
V
PF
DS1340-33
2.70
2.88
2.97
V
Input Leakage (SCL, CLK)
I
LI
-1
+1
µA
I/O Leakage (SDA, FT/OUT)
I
LO
-1
+1
µA
V
CC
> 2V; V
OL
= 0.4V
3.0
SDA Logic 0 Output
I
OLSDA
1.7V < V
CC
< 2V; V
OL
= 0.2 x V
CC
3.0
mA
V
CC
> 2V; V
OL
= 0.4V
3.0
1.7V < V
CC
< 2V; V
OL
= 0.2 x V
CC
3.0
mA
FT/OUT Logic 0 Output
I
OLSQW
1.3V < V
CC
< 1.7V; V
OL
= 0.2x V
CC
250
µA
DS1340-18
72
150
DS1340-3
108
200
Active Supply Current (Note 13)
I
CCA
DS1340-33
192
300
µA
DS1340-18
60
100
DS1340-3
81
125
Standby Current (Note 14)
I
CCS
DS1340-33
100
150
µA
V
BACKUP
Leakage Current
I
BACKUPLKG
V
BACKUP
= 3.7V
100
nA
DC ELECTRICAL CHARACTERISTICS
(V
CC
= 0V, V
BACKUP
= 3.7V, T
A
= -40°C to +85°C, unless otherwise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
I
BACKUP1
OSC ON, FT = 0 (Note 15)
800
1150
I
BACKUP2
OSC ON, FT = 1 (Note 15)
850
1250
Oscillator Current
I
BACKUP3
OSC ON, FT = 0, V
BACKUP
= 3.0V,
T
A
= +25°C (Notes 15, 16)
800
1000
nA
V
BACKUP
Data-Retention Current
I
BACKUPDR
OSC OFF
25.0
100
nA