一、功能说明： EC340EGB
CMOS生产工艺，自身功耗低。工作电压宽，抗干扰能力强。OUT输出电平可选，定时时间范围宽,定时OPTION为8倍差。上电输出高电平，按键开始定时，LED1输出低电平，定时时间到，LED1输出高电平。
二、电气特性：(VDD=3.0V,GND=0V,Ta=25oC)
|
Characteristies
|
Sym
|
Min
|
Typ
|
Max
|
Unit
|
Remarks
|
|
工作电压
|
Vdd
|
2.2
|
3
|
5
|
V
|
|
|
工作电流
|
Iop
|
|
|
200
|
μA
|
No load
|
|
静态电流
|
Isb
|
|
|
2
|
μA
|
No load
|
|
LED1推动电流
|
Iol
|
30
|
|
|
mA
|
Vdd=3V,Vds=1.2V
|
|
振荡频率
|
Fosc
|
|
|
|
KHz
|
外接电阻
|
|
工作温度
|
Temp
|
0
|
25
|
60
|
℃
|
|
N倍定时选择：
|
KEY2
|
KEY1
|
定时时间
|
|
0
|
0
|
标准定时参考上表
|
|
0
|
1
|
8倍标准定时
|
|
1
|
0
|
64倍标准定时
|
|
1
|
1
|
512倍标准定时
|
六、外接电阻频率测试结果：
|
OP1=0 OP2=0
|
|
R
|
3V
|
时间
|
4.5V
|
时间
|
|
20K
|
841.8KHz
|
10S
|
1.03M
|
8S
|
|
30K
|
688.2K
|
12S
|
818.8K
|
10S
|
|
39K
|
589.6K
|
14S
|
679.5K
|
12S
|
|
51K
|
492.7K
|
17S
|
559.8K
|
15S
|
|
75K
|
385.7K
|
22S
|
422.7K
|
20S
|
|
100K
|
314.5K
|
27S
|
340.5K
|
25S
|
|
150K
|
226.1K
|
37S
|
237.7K
|
35S
|
|
200K
|
173.0K
|
48S
|
180.7K
|
46S
|
|
240K
|
152.9K
|
55S
|
157.3K
|
53S
|
|
300K
|
114.3K
|
73S
|
117.6K
|
71S
|
|
390K
|
97.17K
|
86S
|
98.40K
|
85S
|
|
510K
|
76.10K
|
110S
|
77.0K
|
108S
|
|
750K
|
50.25K
|
167S
|
49.70K
|
169S
|
|
1M
|
40.30K
|
208S
|
40.25K
|
208S
|
|
1.2M
|
31.20K
|
269S
|
30.70K
|
273S
|
|
1.5M
|
27.82K
|
302S
|
27.70K
|
303S
|
|
2M
|
20.95K
|
400S
|
20.35K
|
412S
|
|
3M
|
13.80K
|
608S
|
13.75K
|
610S
|
|
4.7M
|
8.8K
|
953S
|
8.50K
|
987S
|
|
10M
|
4.1K
|
2046S
|
4.10K
|
2046S
|
|
15M
|
2.9K
|
2892S
|
2.8K
|
2996S
|
|
20M
|
2.05K
|
4934S
|
1.65K
|
4194S
|
|
22M
|
1.70K
|
4934S
|
1.65K
|
5084S
|