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参数资料
| 型号： | MC74HC390DR2 |
| 厂商： | ON SEMICONDUCTOR |
| 元件分类： | 计数器 |
| 英文描述： | HC/UH SERIES, ASYN NEGATIVE EDGE TRIGGERED 3-BIT UP DECADE COUNTER, PDSO16 |
| 封装： | PLASTIC, SOIC-16 |
| 文件页数： | 4/9页 |
| 文件大小： | 223K |
| 代理商： | MC74HC390DR2 |
MC74HC390
http://onsemi.com
4
PIN DESCRIPTIONS
INPUTS
Clock A (Pins 1, 15) and Clock B (Pins 4, 15)
Clock A is the clock input to the ÷ 2 counter; Clock B is
the clock input to the ÷ 5 counter. The internal flipflops are
toggled by hightolow transitions of the clock input.
CONTROL INPUTS
Reset (Pins 2, 14)
Asynchronous reset. A high at the Reset input prevents
counting, resets the internal flipflops, and forces QA
through QD low.
OUTPUTS
QA (Pins 3, 13)
Output of the ÷ 2 counter.
QB, QC, QD (Pins 5, 6, 7, 9, 10, 11)
Outputs of the ÷ 5 counter. QD is the most significant bit.
QA is the least significant bit when the counter is connected
for BCD output as in Figure 4. QB is the least significant bit
when the counter is operating in the biquinary mode as in
Figure 5.
SWITCHING WAVEFORMS
Q
tr
tf
tPLH
tPHL
tTLH
tTHL
VCC
GND
CLOCK
10%
50%
90%
1/fmax
tw
trec
RESET
Figure 1.
Figure 2.
VCC
GND
VCC
GND
10%
50%
90%
Q
CLOCK
50%
tPHL
tw
10%
TEST CIRCUIT
*Includes all probe and jig capacitance
CL*
TEST POINT
DEVICE
UNDER
TEST
OUTPUT
Figure 3.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MC74HC390N | 制造商:Motorola Inc 功能描述:Counter, Up, 16 Pin, Plastic, DIP |
| MC74HC393AD | 功能描述:计数器移位寄存器 2-6V Dual 4-Stage RoHS:否 制造商:Texas Instruments 计数器类型: 计数顺序:Serial to Serial/Parallel 电路数量:1 封装 / 箱体:SOIC-20 Wide 逻辑系列: 逻辑类型: 输入线路数量:1 输出类型:Open Drain 传播延迟时间:650 ns 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装:Reel |
| MC74HC393ADG | 功能描述:计数器移位寄存器 2-6V Dual 4-Stage Binary RoHS:否 制造商:Texas Instruments 计数器类型: 计数顺序:Serial to Serial/Parallel 电路数量:1 封装 / 箱体:SOIC-20 Wide 逻辑系列: 逻辑类型: 输入线路数量:1 输出类型:Open Drain 传播延迟时间:650 ns 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装:Reel |
| MC74HC393ADR2 | 功能描述:计数器移位寄存器 2-6V Dual 4-Stage RoHS:否 制造商:Texas Instruments 计数器类型: 计数顺序:Serial to Serial/Parallel 电路数量:1 封装 / 箱体:SOIC-20 Wide 逻辑系列: 逻辑类型: 输入线路数量:1 输出类型:Open Drain 传播延迟时间:650 ns 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装:Reel |
| MC74HC393ADR2G | 功能描述:计数器移位寄存器 2-6V Dual 4-Stage Binary RoHS:否 制造商:Texas Instruments 计数器类型: 计数顺序:Serial to Serial/Parallel 电路数量:1 封装 / 箱体:SOIC-20 Wide 逻辑系列: 逻辑类型: 输入线路数量:1 输出类型:Open Drain 传播延迟时间:650 ns 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装:Reel |
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