Datasheet

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 ..........................Refer to the IPC/JEDEC
J-STD-020 Specification.
(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)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Supply Voltage (Note 2) V
CC
DS139x-33 2.97 3.3 5.50
VDS139x-3 2.7 3.0 3.3
DS139x-18 1.71 1.8 1.89
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
V
BACKUP
Voltage (Note 2) V
BACKUP
-33 1.3 3.0 V
CC(MAX)
V-3 1.3 3.0 3.7
-18 1.3 3.0 3.7
Power-Fail Voltage (Note 2) V
PF
-33 2.70 2.88 2.97
V-3 2.45 2.6 2.70
-18 1.51 1.6 1.71
Trickle-Charge Current-Limiting
Resistors
R1 (Notes 3, 4) 250
ΩR2 (Notes 3, 5) 2000
R3 (Notes 3, 6) 4000
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
DOUT Logic 1 Output I
OHDOUT
-33, -3 (V
OH
= 0.85 x V
CC
) -1
mA
-18 (V
OH
= 0.80 x V
CC
) 0.750
DOUT Logic 0 Output I
OHDOUT
-33, -3 (V
OL
= 0.15 x V
CC
) 3
mA
-18 (V
OL
= 0.20 x V
CC
) 2
Logic 0 Output
(DS1390/DS1393/DS1394
SQW/INT; DS1392 SQW, INT;
DS1391/DS1393 RST)
I
OLSIR
V
CC
> 1.71V; V
OL
= 0.4V 3.0 mA
1.3V < V
CC
< 1.71V; V
OL
= 0.4V 250 µA
V
CC
Active Supply Current
(Note 10)
I
CCA
-33 2
mA
-3 2
-18 500 µA
www.maximintegrated.com
Maxim Integrated │ 2
DS1390–DS1394 Low-Voltage SPI/3-Wire RTCs
with Trickle Charger
Absolute Maximum Ratings
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.
Recommended DC Operating Conditions