DS1343_1112 Datasheet, PDF (2/20 Pages) Maxim Integrated Products – Low-Current SPI/3-Wire RTCs

Low-Current SPI/3-Wire RTCs
ABSOLUTE MAXIMUM RATINGS
Voltage Range on VCC or VBAT
Relative to Ground............................................-0.3V to +6.0V
Voltage Range on Any Nonpower Pin
Relative to Ground................................ -0.3V to (VCC + 0.3V)
Operating Temperature Range........................... -40NC to +85NC
Junction Temperature Maximum.....................................+150NC
Storage Temperature Range............................ -55NC to +125NC
Lead Temperature (soldering, 10s).................................+260NC
Soldering Temperature (reflow).......................................+260NC
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.
PACKAGE THERMAL CHARACTERISTICS (Note 1)
TSSOP
Junction-to-Ambient Thermal Resistance (BJA)...........91NC/W
Junction-to-Case Thermal Resistance (BJC)................20NC/W
TDFN
Junction-to-Ambient Thermal Resistance (BJA)...........54NC/W
Junction-to-Case Thermal Resistance (BJC)..................8NC/W
Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-
layer board. For detailed information on package thermal considerations, refer to www.maxim-ic.com/thermal-tutorial.
RECOMMENDED OPERATING CONDITIONS
(TA = -40°C to +85°C, unless otherwise noted.) (Note 2)
PARAMETER
Operating Voltage Range
Minimum Timekeeping Voltage
Backup Voltage
SYMBOL
VCC
VBATTMIN
VBAT
DS134_-18
DS134_-3
DS134_-33
TA = +25NC
CONDITIONS
Logic 1 Input
VIH
Logic 0 Input
VIL
MIN
1.71
2.7
3.0
1.3
0.7 x
VCC
-0.3
TYP MAX UNITS
1.8
5.5
3.0
5.5
V
3.3
5.5
1.15 1.3
V
5.5
V
VCC +
0.3
V
0.3 x
V_CC
V
DC ELECTRICAL CHARACTERISTICS
(VCC = VCC(MIN) to +5.5V, VBAT = +1.3V to +5.5V, TA = -40°C to +85°C, unless otherwise noted.) (Notes 2, 3)
PARAMETER
Power-Supply Active Current
Power-Supply Standby Current
(Note 5)
Backup Leakage Current
Backup Current (Oscillator Off)
Backup Current
(Note 6)
DS1343
DS1344
SYMBOL
ICCA
ICCS
IBATLKG
IBAT
IBAT1
CONDITIONS
-3 or -33: fSCLK = 4MHz (Note 4)
-33: VCC = 3.63V
VCC = VCC(MAX)
VCC > VPF
TA = +25NC, VCC = 0V, EOSC = 1
VBAT = 3V
VBAT = VBAT(MAX)
VBAT = 3V
VBAT = VBAT(MAX)
MIN TYP
-100 +25
250
350
MAX
600
120
160
+100
100
500
600
UNITS
FA
FA
nA
nA
nA
2