Datasheet

DS1374
I
2
C, 32-Bit Binary Counter Watchdog RTC with
Trickle Charger and Reset Input/Output
_____________________________________________________________________ 3
DC ELECTRICAL CHARACTERISTICS
(V
CC
= V
CC(MIN)
to V
CC(MAX)
, T
A
= -40°C to +85°C, unless otherwise noted.) (Note 2)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
R1 (Note 6) 250
R2 (Note 7) 2000
Trickle-Charge Current-Limiting
Resistors
R3 (Note 8) 4000

Input Leakage I
LI
(Note 9) -1 +1
I/O Leakage I
LO
(Note 10) -1 +1
RST Pin I/O Leakage I
LORST
(Note 11) -200 +1
μA
SDA Logic 0 Output (V
OL
= 0.4V) I
OLSDA
3.0 mA
V
CC
> 2V; V
OL
= 0.4V 3.0
1.71V < V
CC
< 2V; V
OL
= 0.2 V
CC
3.0
mA
RST, SQW, and INT Logic 0
Outputs (Note 12)
I
OL1
1.3V < V
CC
< 1.71V; V
OL
= 0.2 V
CC
250 μA
DS1374-18 75 150
DS1374-3 110 200
Active Supply Current
(Notes 12, 13)
I
CCA
DS1374-33 180 300
μA
DS1374-18 60 100
DS1374-3 80 125
Standby Current (Notes 12, 14) I
CCS
DS1374-33 115 175
μA
V
BACKUP
Leakage Current
(V
BACKUP
= 3.7V)
I
BACKUPLKG
100 nA
DC ELECTRICAL CHARACTERISTICS
(V
CC
= 0V, V
BACKUP
= 3.7V, T
A
= -40°C to +85°C, unless otherwise noted.) (Note 2)
PARAMETER SYMBOL CONDITIONS MAX TYP MAX UNITS
V
BACKUP
Current (OSC ON);
SQW OFF
I
BKOSC1
(Note 15) 400 700 nA
V
BACKUP
Current (OSC ON);
SQW ON (32kHz)
I
BKOSC2
(Notes 15, 16) 600 1000 nA
V
BACKUP
Data-Retention Current
(OSC OFF)
I
BACKUPDR
25 100 nA