Rainbow Electronics DS1393 User Manual
Page 2
DS1390/DS1391/DS1392/DS1393
Low-Voltage SPI/3-Wire RTCs with
Trickle Charger
2
_____________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
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 nominal supply voltage and T
A
= +25°C,
unless otherwise noted.) (Note 1)
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
absolute maximum rating conditions for extended periods may affect device reliability.
Voltage Range on V
CC
Pin Relative to Ground .....-0.3V to +6.0V
Voltage Range on Inputs Relative
to Ground ...............................................-0.3V to (V
CC
+ 0.3V)
Operating Temperature Range ...........................-40
°C to +85°C
Storage Temperature Range .............................-55°C to +125°C
Soldering Temperature .......................................See IPC/JEDEC
J-STD-020A Specification
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
DS139x-33
2.97
3.3
5.50
DS139x-3
2.7
3.0
3.3
Supply Voltage (Note 2)
V
CC
DS139x-18
1.71
1.8
1.89
V
Logic 1
V
IH
(Note 2)
0.7 x
V
CC
V
CC
+
0.5
V
Logic 0
V
IL
(Note 2)
-0.3
+0.3 x
V
CC
V
Supply Voltage, Pullup
SQW/INT, SQW, INT, V
CC
= 0V
V
PU
(Note 2)
5.5
V
-33
1.3
3.0
V
CC(MAX)
-3
1.3
3.0
3.7
V
BACKUP
Voltage (Note 2)
V
BACKUP
-18
1.3
3.0
3.7
V
-33
2.70
2.88
2.97
-3
2.45
2.6
2.70
Power-Fail Voltage (Note 2)
V
PF
-18
1.51
1.6
1.71
V
R1
(Notes 3, 4)
250
R2
(Notes 3, 5)
2000
Trickle-Charge Current-Limiting
Resistors
R3
(Notes 3, 6)
4000
Ω
Input Leakage
I
LI
(Note 7)
-1
+1
µA
I/O Leakage
I
LO
(Note 8)
-1
+1
µA
RST Pin I/O Leakage
I
LORST
(Note 9)
-200
+10
µA
-33, -3 (V
OH
= 0.85 x V
CC
)
-1
DOUT Logic 1 Output
I
OHDOUT
-18 (V
OH
= 0.80 x V
CC
)
0.750
mA
-33, -3 (V
OL
= 0.15 x V
CC
)
3
DOUT Logic 0 Output
I
OHDOUT
-18 (V
OL
= 0.20 x V
CC
)
2
mA
V
CC
> 1.71V; V
OL
= 0.4V
3.0
mA
Logic 0 Output
(DS1390/DS1393 SQW/INT;
DS1392 SQW, INT;
DS1391/DS1393 RST)
I
OLSIR
1.3V < V
CC
< 1.71V; V
OL
= 0.4V
250
µA
-33
2
-3
2
mA
V
CC
Active Supply Current
(Note 10)
I
CCA
-18
500
µA