Low-Current I2C RTC with 56-Byte NV RAM 2 Maxim Integrated (All voltages " />
鍙冩暩(sh霉)璩囨枡
鍨嬭櫉(h脿o)锛� DS1308U-33+T
寤犲晢锛� Maxim Integrated Products
鏂囦欢闋�(y猫)鏁�(sh霉)锛� 9/16闋�(y猫)
鏂囦欢澶�?銆�?/td> 0K
鎻忚堪锛� IC RTC 56BYTE NVRAM I2C 8UMAX
妯�(bi膩o)婧�(zh菙n)鍖呰锛� 3,000
椤炲瀷锛� 鏅�(sh铆)閻�/鏃ユ
鐗归粸(di菐n)锛� 闁忓勾锛孨VSRAM锛屾柟娉㈣几鍑�
瀛樺劜(ch菙)瀹归噺锛� 56B
鏅�(sh铆)闁撴牸寮忥細 HH:MM:SS锛�12/24 灏忔檪(sh铆)锛�
鏁�(sh霉)鎿�(j霉)鏍煎紡锛� YY-MM-DD-dd
鎺ュ彛锛� I²C锛�2 绶氫覆鍙�
闆绘簮闆诲锛� 3 V ~ 5.5 V
闆诲 - 闆绘簮锛岄浕姹狅細 1.3 V ~ 5.5 V
宸ヤ綔婧害锛� -40°C ~ 85°C
瀹夎椤炲瀷锛� 琛ㄩ潰璨艰
灏佽/澶栨锛� 8-TSSOP锛�8-MSOP锛�0.118"锛�3.00mm 瀵級
渚涙噳(y墨ng)鍟嗚ō(sh猫)鍌欏皝瑁濓細 8-uMAX
鍖呰锛� 甯跺嵎 (TR)
DS1308
Low-Current I2C RTC with 56-Byte NV RAM
2
Maxim Integrated
(All voltages relative to ground.)
Voltage Range on VCC or VBAT ...........................-0.3V to +6.0V
Voltage on Any Non-Power Pin................ -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) ................................+300NC
Soldering Temperature (reflow) ......................................+260NC
ABSOLUTE MAXIMUM RATINGS
Stresses beyond those listed under 鈥淎bsolute Maximum Ratings鈥� may cause permanent damage to the device. These are stress ratings only, and functional opera-
tion 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 = -40NC to +85NC, unless otherwise noted.) (Note 2)
DC ELECTRICAL CHARACTERISTICS
(VCC = VCCMIN to VCCMAX, VBAT = VBATMIN to VBATMAX, TA = -40NC to +85NC, unless otherwise noted.) (Note 2)
F
SOP
Junction-to-Ambient Thermal Resistance (BJA) .....206.3NC/W
Junction-to-Case Thermal Resistance (BJC) ...............42NC/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.maximintegrated.com/thermal-tutorial.
PACKAGE THERMAL CHARACTERISTICS (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Operating Voltage Range
VCC
DS1308-18
1.71
1.8
5.5
V
DS1308-3
2.7
3.0
5.5
DS1308-33
3.0
3.3
5.5
Battery Voltage
VBAT
1.3
5.5
V
Logic 1 Input
VIH
0.7 x
VCC
VCC +
0.3
V
Logic 0 Input
VIL
-0.3
0.3 x
VCC
V
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Power-Supply Active Current
(Note 3)
ICCA
fSCL = 400kHz
325
F
A
Power-Supply Standby Current
(Note 4)
ICCS
-33: VCC = 3.63V
125
F
A
-18: VCC = 1.89V
100
VCC = VCCMAX
200
Battery Leakage Current
IBATLKG
VCC R VPF
-100
25
+100
nA
Input Leakage (SCL)
II
VIN = 0V to VCC
-0.1
+0.1
F
A
I/O Leakage (SDA, SQW/CLKIN)
IIO
I2C bus inactive, ECLK = 1
-0.1
+0.1
F
A
Output Logic 0 (SDA, SQW/
CLKIN), VOL = 0.4V
IOL
VCC R VCCMIN
3.0
mA
VBAT R 1.3V R VCC + 0.2V
250
F
A
Power-Fail Trip Point
VPF
-33
2.70
2.82
3.00
V
-18
1.45
1.62
1.70
Switchover Voltage
VSW
VBAT > VPF
VPF
V
VBAT < VPF
VBAT > VCC
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