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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： | 6/9页 |
| 文件大小： | 223K |
| 代理商： | MC74HC390DR2 |
MC74HC390
http://onsemi.com
6
APPLICATIONS INFORMATION
Each half of the MC54/74HC390 has independent ÷ 2
and ÷ 5 sections (except for the Reset function). The ÷ 2
and ÷ 5 counters can be connected to give BCD or
biquinary (25) count sequences. If Output QA is
connected to the Clock B input (Figure 4), a decade divider
with BCD output is obtained. The function table for the BCD
count sequence is given in Table 1.
To obtain a biquinary count sequence, the input signals
connected to the Clock B input, and output QD is connected
to the Clock A input (Figure 5). QA provides a 50% duty
cycle output. The biquinary count sequence function table
is given in Table 2.
1. BCD Count Sequence*
Count
Output
QD
QC
QB
QA
0
L
1
L
H
2
L
H
L
3
L
H
4
L
H
L
5
L
H
L
H
6
L
H
L
7
L
H
8
H
L
9
H
L
H
*QA connected to Clock B input.
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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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