DS3234 데이터 시트보기 (PDF) - Maxim Integrated
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DS3234 Datasheet PDF : 21 Pages
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DS3234
Extremely Accurate SPI Bus RTC
with Integrated Crystal and SRAM
Absolute Maximum Ratings
Voltage Range on Any Pin Relative to Ground......-0.3V to +6.0V
Junction-to-Ambient Thermal Resistance (θJA) (Note 1) ...55°C/W
Junction-to-Case Thermal Resistance (θJC) (Note 1) ........24°C/W
Operating Temperature Range
(noncondensing) .............................................-40°C to +85°C
Junction Temperature ......................................................+125°C
Storage Temperature Range ...............................-40°C to +85°C
Lead Temperature (soldering, 10s) .................................+260°C
Soldering Temperature (reflow, 2 times max) ....................+260°C
(See the Handling, PC Board Layout, and Assembly section.)
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.maximintegrated.com/thermal-tutorial.
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
(TA = -40°C to +85°C, unless otherwise noted.) (Notes 2, 3)
PARAMETER
SYMBOL
CONDITIONS
Supply Voltage
VCC
VBAT
Logic 1 Input CS, SCLK, DIN
VIH
Logic 0 Input CS, SCLK, DIN,
RST
VIL
2.0V VCC 3.63V
3.63V < VCC 5.5V
MIN
2.0
2.0
0.7 x
VCC
-0.3
-0.3
TYP
3.3
3.0
MAX
5.5
3.8
VCC +
0.3
+0.2 x
VCC
+0.7
UNITS
V
V
V
Electrical Characteristics
(VCC = 2.0V to 5.5V, VCC = active supply (see Table 1), TA = -40°C to +85°C, unless otherwise noted.) (Typical values are at VCC =
3.3V, VBAT = 3.0V, and TA = +25°C, unless otherwise noted. TCXO operation guaranteed from 2.3V to 5.5V on VCC and 2.3V to 3.8V on
VBAT.) (Notes 2, 3)
PARAMETER
Active Supply Current
Standby Supply Current
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
ICCA
SCLK = 4MHz, BSY = 0
(Notes 4, 5)
VCC = 3.63V
VCC = 5.5V
400
µA
700
ICCS
CS = VIH, 32kHz output off,
SQW output off
(Note 5)
VCC = 3.63V
VCC = 5.5V
120
µA
160
Temperature Conversion Current
ICCSCONV
SPI bus inactive, 32kHz
output off, SQW output off
VCC = 3.63V
VCC = 5.5V
500
µA
600
Power-Fail Voltage
VPF
2.45 2.575 2.70
V
VBAT Leakage Current
IBATLKG
25
100
nA
(VCC = 2.0V to 5.5V, TA = -40°C to +85°C, unless otherwise noted.) (Notes 2 and 3)
Logic 1 Output, 32kHz
VCC > 3.63V,
IOH = -500µA
IOH = -250µA
VOH
3.63V > VCC > 2.7V,
2.7V > (VCC or VBAT) > 2.0V
0.85 x VCC
V
IOH = -125µA
(BB32kHz = 1)
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