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参数资料
| 型号： | MM54C90N |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 通用总线功能 |
| 英文描述： | 4-Bit Decade, Binary Counter |
| 中文描述： | CMOS SERIES, ASYN NEGATIVE EDGE TRIGGERED 3-BIT UP DECADE COUNTER, PDIP14 |
| 封装： | PLASTIC, DIP-14 |
| 文件页数： | 4/6页 |
| 文件大小： | 124K |
| 代理商： | MM54C90N |
Switching Time Waveforms
TL/F/5889–7
Note 1:
MM54C90, MM74C90 and MM54C93,
MM74C93 are solid line waveforms. Dashed line
waveforms are for MM54C90/MM74C90 only.
Truth Table
MM54C90/MM74C90 4-Bit Decade Counter
BCD Count Sequence
Count
Output
Q
D
Q
C
Q
B
Q
A
0
1
2
3
4
5
6
7
8
9
L
L
L
L
L
L
L
L
H
H
L
L
L
L
H
H
H
H
L
L
L
L
H
H
L
L
H
H
L
L
L
H
L
H
L
H
L
H
L
H
Output Q
A
is connected to Input B for
BCD count.
H
e
High Level
L
e
Low Level
X
e
Irrelevant
Reset/Count Function Table
Reset Inputs
Output
R
01
R
02
R
91
R
92
Q
D
Q
C
Q
B
Q
A
H
H
X
X
L
L
X
H
H
X
L
X
X
L
L
X
H
X
L
X
L
X
L
H
L
X
L
X
L
L
H
L
L
L
Count
Count
Count
Count
L
L
L
L
L
H
MM54C93/MM74C93 4-Bit Binary Counter
Binary Count Sequence
Count
Output
Q
D
Q
C
Q
B
Q
A
0
1
2
3
4
5
6
7
8
9
L
L
L
L
L
L
L
L
H
H
H
H
H
H
H
H
L
L
L
L
H
H
H
H
L
L
L
L
H
H
H
H
L
L
H
H
L
L
H
H
L
L
H
H
L
L
H
H
L
H
L
H
L
H
L
H
L
H
L
H
L
H
L
H
10
11
12
13
14
15
Output Q
A
is connected to input B for
binary count sequence.
H
e
High Level
L
e
Low Level
X
e
Irrelevant
Reset/Count Function Table
Reset
Inputs
Output
R
01
R
02
Q
D
Q
C
Q
B
Q
A
H
L
X
H
X
L
L
L
L
L
Count
Count
4
相关PDF资料 |
PDF描述 |
|---|---|
| MM54C93J | 4-Bit Decade, Binary Counter |
| MM54C93N | 4-Bit Decade, Binary Counter |
| MM54C932 | Phase Comparator |
| MM54C932N | Phase Comparator |
| MM74C932 | Phase Comparator |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MM54C910 | 制造商:TI 制造商全称:Texas Instruments 功能描述:256-Bit TRI-STATE Random Access Read/Write Memory |
| MM54C910J | 制造商:TI 制造商全称:Texas Instruments 功能描述:256-Bit TRI-STATE Random Access Read/Write Memory |
| MM54C910N | 制造商:TI 制造商全称:Texas Instruments 功能描述:256-Bit TRI-STATE Random Access Read/Write Memory |
| MM54C914 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:Hex Schmitt Trigger with Extended Input Voltage |
| MM54C914 WAF | 制造商:Texas Instruments 功能描述: |
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