CD4541/CC4541是一个可编程分频器,它为十六级二分频器。当脉冲源产生的脉冲信号后,一般其频率较高,这样就需要分频把高频脉冲变换成合适于计时的低频脉冲信号,得到50HZ的脉冲信号。
真值表:
引脚 | State 状态 | |
0 | 1 | |
5 | Auto Reset Operating 自动复位操作 | Auto Reset Disabled 自动复位禁止 |
6 | Timer Operational 定时器操作 | Master Reset On 主复位On |
9 | Output Initially Low after Reset输出最初低电平后重启 | Output Initially High after Reset 输出最初高电平后重启 |
10 | Single Cycle Mode 单周期模式 | Recycle Mode 循环模式 |
比率表:
A | B | Number of Counter Stages n |
Count 2n |
0 | 0 | 13 | 8192 |
0 | 1 | 10 | 1024 |
1 | 0 | 8 | 256 |
1 | 1 | 16 | 65536 |
引脚图
逻辑图
Absolute Maximum Ratings 绝对最大额定值:
Supply Voltage电源电压(VDD) | −0.5V to +18V |
Input Voltage输入电压 (VIN) | −0.5V to VDD +0.5V |
Storage Temperature Range储存温度范围 (TS) | −65℃ to +150℃ |
Power Dissipation功耗 (PD) | |
Dual-In-Line 普通双列封装 | 700 mW |
Small Outline 小外形封装 | 500 mW |
Lead Temperature 焊接温度(TL) | |
Soldering, 10 seconds)(焊接10秒) | 260℃ |
Recommended Operating Conditions 建议操作条件:
Supply Voltage电源电压(VDD) | 3V to 15V |
Input Voltage输入电压 (VIN) | 0 to VDD |
Operating Temperature Range工作温度范围 | −55℃ to +125℃ |
DC Electrical Characteristics 直流电气特性:
Symbol 符号 |
Paramete参数 | Conditions 条件 | −55℃ | +25℃ | +125℃ |
Units 单位 |
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最小 | 最大 | 最小 | 典型 | 最大 | 最小 | 最大 | ||||||
IDD | Quiescent Device Current静态电流 | VDD = 5V, VIN = VDD or VSS | 5 | 0.005 | 5 | 150 | μA | |||||
VDD = 10V, VIN = VDD or VSS | 10 | 0.010 | 10 | 300 | ||||||||
VDD = 15V, VIN = VDD or VSS | 20 | 0.015 | 20 | 600 | ||||||||
VOL | LOW Level Output Voltage 输出低电平电压 | VDD=5V | |IO|<1μA | 0.05 | 0 | 0.05 | 0.05 | V | ||||
VDD=10V | 0.05 | 0 | 0.05 | 0.05 | ||||||||
VDD=15V | 0.05 | 0 | 0.05 | 0.05 | ||||||||
VOH | HIGH Level Output Voltage 输出高电平电压 | VDD =5V | |IO|<1μA | 4.95 | 4.95 | 5 | 4.95 | V | ||||
VDD=10V | 9.95 | 9.95 | 10 | 9.95 | ||||||||
VDD=15V | 14.95 | 14.95 | 15 | 14.95 | ||||||||
VIL | LOW Level Input Voltage 输入低电平电压 | VDD = 5V, VO = 0.5V or 4.5V | 1.5 | 2 | 1.5 | 1.5 | V | |||||
VDD = 10V, VO = 1.0V or 9.0V | 3.0 | 4 | 3.0 | 3.0 | ||||||||
VDD = 15V, VO = 1.5V or 13.5V | 4.0 | 6 | 4.0 | 4.0 | ||||||||
VIH | HIGH Level Input Voltage 输入高电平电压 | VDD = 5V, VO = 0.5V or 4.5V | 3.5 | 3.5 | 3 | 3.5 | V | |||||
VDD = 10V, VO = 1.0V or 9.0V | 7.0 | 7.0 | 6 | 7.0 | ||||||||
VDD = 15V, VO = 1.5V or 13.5V | 11.0 | 11.0 | 9 | 11.0 | ||||||||
IOL | LOW Level Output Current 输出低电平电流 (Note 3) | VDD=5V,VO=0.4V | 2.85 | 2.27 | 3.6 | 1.6 | mA | |||||
VDD=10V,VO=0.5V | 4.16 | 4.0 | 9.0 | 2.8 | ||||||||
VDD=15V,VO=1.5V | 19.3 | 15.6 | 34.0 | 10.9 | ||||||||
IOH | HIGH Level Output Current 输出高电平电流 (Note 3) | VDD=5V,VO=2.5V | 7.96 | 6.42 | 130 | 4.49 | mA | |||||
VDD=10V,VO=9.5V | 4.19 | 3.38 | 8.0 | 2.37 | ||||||||
VDD=15V,VO=13.5V | 16.3 | 13.2 | 30.0 | 9.24 | ||||||||
IIN | Input Current 输入电流 | VDD =15V,VIN =0V | −0.1 | −10−5 | −0.1 | −1.0 | μA | |||||
VDD =15V,VIN=15V | 0.1 | 10−5 | 0.1 | 1.0 |
AC Electrical Characteristics 交流电气特性:
Symbol 符号 | Parameter 参数 | Conditions条件 | 最小 | 典型 | 最大 | Units 单位 |
tTLH | Output Rise Time 输出上升时间 | VDD = 5V | 50 | 200 | ns | |
VDD = 10V | 30 | 100 | ||||
VDD = 15V | 25 | 80 | ||||
tTHL | Output Fall Time 输出下降时间 | VDD = 5V | 50 | 200 | ns | |
VDD = 10V | 30 | 100 | ||||
VDD = 15V | 25 | 80 | ||||
tPLH, tPHL | Turn-Off, Turn-On Propagation Delay, Clock to Q (28 Output) | VDD = 5V | 1.8 | 4.0 | μs | |
VDD = 10V | 0.6 | 1.5 | ||||
VDD = 15V | 0.4 | 1.0 | ||||
tPHL, tPLH | Turn-On, Turn-Off Propagation Delay, Clock to Q (216 Output) | VDD = 5V | 3.2 | 8.0 | μs | |
VDD = 10V | 1.5 | 3.0 | ||||
VDD = 15V | 1.0 | 2.0 | ||||
tWH(CL) | Clock Pulse Width 时钟脉冲宽度 | VDD = 5V | 400 | 200 | ns | |
VDD = 10V | 200 | 100 | ||||
VDD = 15V | 150 | 70 | ||||
fCL | Clock Pulse Frequency 时钟脉冲频率 | VDD = 5V | 2.5 | 1.0 | MHz | |
VDD = 10V | 6.0 | 3.0 | ||||
VDD = 15V | 8.5 | 4.0 | ||||
tWH(R) | MR Pulse Width MR 脉宽 | VDD = 5V | 400 | 170 | ns | |
VDD = 10V | 200 | 75 | ||||
VDD = 15V | 150 | 50 | ||||
CI | Average Input Capacitance 平均输入电容 | Any Input | 5.0 | 7.5 | pF | |
CPD | Power Dissipation Capacitance功耗电容 (Note 5) | 100 | pF |
应用电路:
图1 定时电路图 此定时电路为声纳浮标定时器,控制系统工作时间长短。此电路结构简单,定时精确度高,此电路定时控制时间最大为15小时,在电路设计上,V+为电压输入端,输入范围在3~15 V, 9013 代表接面二极管(Junction Diodes), K为6 V继电器,做为控制电路开关。 由于此IC 为频率振荡器,以R(电阻)与C(电容)匹配振荡频率。其电路设计上之振荡频率匹配须符合1 kHz≤1/(2.3RC)≤100 kHz 及R≥10Ωk,
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