DS1344 Maxim, DS1344 Datasheet - Page 2

• Manufacturer Part Number: DS1344
• Description: The DS1343/DS1344 low-current real-time clocks (RTCs) are timekeeping devices that provide an extremely low standby current, permitting longer life from a backup supply source
• Manufacturer: Maxim

PACKAGE_THERMAL_CHARACTERISTICS_(Note_1)
TSSOP
Note_1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-
Low-Current SPI/3-Wire RTCs
ABSOLUTE_MAXIMUM_RATINGS
Voltage Range on V
Voltage Range on Any Nonpower Pin
Operating Temperature Range .......................... -40NC to +85NC
2
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_OPERATING_CONDITIONS
(T
DC_ELECTRICAL_CHARACTERISTICS
(V
Operating Voltage Range
Minimum Timekeeping Voltage
Backup Voltage
Logic 1 Input
Logic 0 Input
Power-Supply Active Current
Power-Supply Standby Current
(Note 5)
Backup Leakage Current
Backup Current (Oscillator Off)
Backup Current
(Note 6)
A
Junction-to-Ambient Thermal Resistance (B
Junction-to-Case Thermal Resistance (B
CC
Relative to Ground ............................................-0.3V to +6.0V
Relative to Ground ................................ -0.3V to (V
= -40°C to +85°C, unless otherwise noted.) (Note 2)
= V
layer board. For detailed information on package thermal considerations, refer to www.maxim-ic.com/thermal-tutorial.
CC(MIN)
PARAMETER
PARAMETER
to +5.5V, V
CC
DS1343
DS1344
or V
BAT
BAT
= +1.3V to +5.5V, T
V
SYMBOL
SYMBOL
I
BAT
BATLKG
I
V
I
I
V
I
BAT1
V
CCA
CCS
V
BAT
BAT
CC
IH
IL
T
JC
MIN
) ...............20NC/W
JA
) ..........91NC/W
DS134_-18
DS134_-3
DS134_-33
T
-3 or -33: f
-33: V
V
V
T
V
V
V
V
A
A
CC
CC
BAT
BAT
BAT
BAT
CC
= +25NC
= +25NC, V
A
= V
> V
= 3V
= V
= 3V
= V
CC
= -40°C to +85°C, unless otherwise noted.) (Notes 2, 3)
+ 0.3V)
CC(MAX)
PF
BAT(MAX)
BAT(MAX)
= 3.63V
SCLK
CC
CONDITIONS
CONDITIONS
= 4MHz (Note 4)
= 0V, EOSC = 1
Junction Temperature Maximum .....................................+150NC
Storage Temperature Range ............................ -55NC to +125NC
Lead Temperature (soldering, 10s) ................................+260NC
Soldering Temperature (reflow) ......................................+260NC
TDFN
Junction-to-Ambient Thermal Resistance (B
Junction-to-Case Thermal Resistance (B
0.7 x
1.71
V
-100
MIN
MIN
-0.3
2.7
3.0
1.3
CC
TYP
1.15
TYP
+25
250
350
1.8
3.0
3.3
JC
) .................8NC/W
V
JA
MAX
MAX
+100
0.3 x
V
600
120
160
100
500
600
CC
5.5
5.5
5.5
1.3
5.5
0.3
CC
) ..........54NC/W
+
UNITS
UNITS
FA
FA
nA
nA
nA
V
V
V
V
V