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參數資料
| 型號： | MC74HC390 |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | 通用總線功能 |
| 英文描述： | Dual 4-Stage Binary Ripple Counter with ±2 and ±5 Sections |
| 中文描述： | 雙4位的二進制紋波計數器± 2和± 5節 |
| 文件頁數： | 6/8頁 |
| 文件大?。?/td> | 216K |
| 代理商： | MC74HC390 |
MC54/74HC390
MOTOROLA
High–Speed CMOS Logic Data
DL129 — Rev 6
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 bi–quinary (2–5)
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 bi–quinary 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 bi–quinary count sequence function table is
given in Table 2.
Table 1. BCD Count Sequence*
Count
Output
QD
L
L
L
L
L
L
L
L
H
H
QC
L
L
L
L
H
H
H
H
L
L
QB
L
L
H
H
L
L
H
H
L
L
QA
L
H
L
H
L
H
L
H
L
H
0
1
2
3
4
5
6
7
8
9
* QA connected to Clock B input.
Table 2. Bi–Quinary Count Sequence**
Count
Output
QA
L
L
L
L
L
H
H
H
H
H
QD
L
L
L
L
H
L
L
L
L
H
QC
L
L
H
H
L
L
L
H
H
L
QB
L
H
L
H
L
L
H
L
H
L
0
1
2
3
4
8
9
10
11
12
**QD connected to Clock A input.
CONNECTION DIAGRAMS
1, 15
÷
2
COUNTER
CLOCK A
RESET
Figure 4. BCD Count
Figure 5. Bi-Quinary Count
÷
2
COUNTER
÷
5
COUNTER
÷
5
COUNTER
CLOCK B
CLOCK A
RESET
CLOCK B
1, 15
QA
QB
QC
QD
3, 13
5, 11
6, 10
7, 9
4, 12
2, 14
QA
QB
QC
QD
3, 13
5, 11
6, 10
7, 9
4, 12
2, 14
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| MC74HC390AD | Dual 4-Stage Binary Ripple Counter with ±2 and ±5 Sections |
| MC74HC390ADR2 | Dual 4-Stage Binary Ripple Counter with ±2 and ±5 Sections |
| MC74HC390ADT | Dual 4-Stage Binary Ripple Counter with ±2 and ±5 Sections |
| MC74HC390AN | Dual 4-Stage Binary Ripple Counter with ±2 and ±5 Sections |
| MC74HC390D | Dual 4-Stage Binary Ripple Counter with ±2 and ±5 Sections |
相關代理商/技術參數 |
參數描述 |
|---|---|
| MC74HC390AD | 功能描述:計數器移位寄存器 2-6V Dual 4-Stage RoHS:否 制造商:Texas Instruments 計數器類型: 計數順序:Serial to Serial/Parallel 電路數量:1 封裝 / 箱體:SOIC-20 Wide 邏輯系列: 邏輯類型: 輸入線路數量:1 輸出類型:Open Drain 傳播延遲時間:650 ns 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝:Reel |
| MC74HC390ADG | 功能描述:計數器移位寄存器 LOG CMOS COUNTER 4STAGE RoHS:否 制造商:Texas Instruments 計數器類型: 計數順序:Serial to Serial/Parallel 電路數量:1 封裝 / 箱體:SOIC-20 Wide 邏輯系列: 邏輯類型: 輸入線路數量:1 輸出類型:Open Drain 傳播延遲時間:650 ns 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝:Reel |
| MC74HC390ADR2 | 功能描述:計數器移位寄存器 2-6V Dual 4-Stage RoHS:否 制造商:Texas Instruments 計數器類型: 計數順序:Serial to Serial/Parallel 電路數量:1 封裝 / 箱體:SOIC-20 Wide 邏輯系列: 邏輯類型: 輸入線路數量:1 輸出類型:Open Drain 傳播延遲時間:650 ns 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝:Reel |
| MC74HC390ADR2G | 功能描述:計數器移位寄存器 2-6V Dual 4-Stage Binary w/Divide-by-2 RoHS:否 制造商:Texas Instruments 計數器類型: 計數順序:Serial to Serial/Parallel 電路數量:1 封裝 / 箱體:SOIC-20 Wide 邏輯系列: 邏輯類型: 輸入線路數量:1 輸出類型:Open Drain 傳播延遲時間:650 ns 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝:Reel |
| MC74HC390ADT | 制造商:Rochester Electronics LLC 功能描述:- Tape and Reel |
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