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M41T81M6F 参数 Datasheet PDF下载

M41T81M6F图片预览
型号: M41T81M6F
PDF下载: 下载PDF文件 查看货源
内容描述: 报警串行访问实时时钟 [Serial access Real-Time Clock with alarm]
分类和应用: 时钟
文件页数/大小: 30 页 / 303 K
品牌: STMICROELECTRONICS [ ST ]
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M41T81  
DC and AC parameters  
Table 9.  
Sym  
DC characteristics  
Parameter  
Test condition(1)  
Min  
Typ  
Max  
Unit  
ILI  
Input leakage current  
Output leakage current  
0V VIN VCC  
0V VOUT VCC  
1
1
µA  
µA  
µA  
µA  
V
ILO  
ICC1 Supply current  
ICC2 Supply current (standby)  
Switch freq = 400kHz  
SCL,SDA = VCC – 0.3V  
400  
100  
VIL  
VIH  
Input low voltage  
Input high voltage  
Output low voltage  
–0.3  
0.3VCC  
VCC + 0.3  
0.4  
0.7VCC  
V
IOL = 3.0mA  
IOL = 10mA  
V
V
OL  
Output low voltage (open  
drain)(2)  
0.4  
V
Pull-up supply voltage  
(open drain)  
IRQ/OUT/FT/SQW  
5.5  
3.5(5)  
1
V
V
2.5(4)  
3
(3)  
VBAT  
Battery supply voltage  
TA = 25°C, VCC = 0V  
IBAT Battery supply current  
0.6  
µA  
oscillator on, VBAT = 3V  
1. Valid for Ambient Operating Temperature: T = –40 to 85°C; V = 2.0 to 5.5V (except where noted).  
A
CC  
2. For IRQ/FT/OUT/SQW pin (Open Drain)  
3. STMicroelectronics recommends the RAYOVAC BR1225 or BR1632 (or equivalent) as the battery supply.  
4. After switchover (V ), V (min) can be 2.0V for crystal with R = 40K.  
SO  
BAT  
S
5. For rechargeable back-up, V  
(max) may be considered V  
.
CC  
BAT  
Table 10.  
Sym  
Crystal electrical characteristics  
Parameter(1) (2)  
Min  
Resonant frequency  
Typ  
Max  
Units  
fO  
RS  
CL  
32.768  
kHz  
kΩ  
pF  
Series resistance  
Load capacitance  
60  
12.5  
1. Externally supplied. STMicroelectronics recommends the KDS DT-38: 1TA/1TC252E127, Tuning Fork Type (thru-hole) or the DMX-26S:  
1TJS125FH2A212, (SMD) quartz crystal for industrial temperature operations. KDS can be contacted at kouhou@kdsj.co.jp or  
http://www.kdsj.co.jp for further information on this crystal type.  
2. Load capacitors are integrated within the M41T81. Circuit board layout considerations for the 32.768kHz crystal of minimum trace lengths and  
isolation from RF generating signals should be taken into account.  
Figure 15. Power down/up mode AC waveforms  
V
CC  
V
SO  
tPD  
trec  
SDA  
SCL  
DON'T CARE  
AI00596  
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