参数资料
型号: M41T81M6E
厂商: STMICROELECTRONICS
元件分类: 时钟/数据恢复及定时提取
英文描述: 1 TIMER(S), REAL TIME CLOCK, PDSO8
封装: 0.150 INCH, LEAD FREE, PLASTIC, SOIC-8
文件页数: 7/29页
文件大小: 454K
代理商: M41T81M6E
M41T81
Clock operation
Doc ID 7529 Rev 10
The IRQ/FT/OUT/SQW pin is an open drain output which requires a pull-up resistor to VCC
for proper operation. A 500-10 k resistor is recommended in order to control the rise time.
The FT bit is cleared on power-down.
Figure 10.
Crystal accuracy across temperature
Figure 11.
Clock calibration
AI07888
–160
0
10203040506070
Frequency (ppm)
Temperature
°C
80
–10
–20
–30
–40
–100
–120
–140
–40
–60
–80
20
0
–20
= –0.036 ppm/
°C
2 ± 0.006 ppm/°C2
K
ΔF
= K x (T – T
O)
2
F
T
O = 25°C ± 5°C
AI00594B
NORMAL
POSITIVE
CALIBRATION
NEGATIVE
CALIBRATION
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