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MM74C922WM PDF预览

MM74C922WM

更新时间: 2024-09-15 20:29:19
品牌 Logo 应用领域
安森美 - ONSEMI PC编码器光电二极管逻辑集成电路
页数 文件大小 规格书
11页 143K
描述
Encoder

MM74C922WM 技术参数

生命周期:Obsolete包装说明:SOP, SOP20,.3
Reach Compliance Code:compliant风险等级:5.72
其他特性:20 KEY ENCODER系列:74
JESD-30 代码:R-PDSO-G20长度:12.8 mm
负载电容(CL):50 pF逻辑集成电路类型:ENCODER
位数:9功能数量:1
端子数量:20最高工作温度:85 °C
最低工作温度:-40 °C输出特性:3-STATE
封装主体材料:PLASTIC/EPOXY封装代码:SOP
封装等效代码:SOP20,.3封装形状:RECTANGULAR
封装形式:SMALL OUTLINE最大电源电流(ICC):2.6 mA
传播延迟(tpd):150 ns座面最大高度:2.65 mm
最大供电电压 (Vsup):15 V最小供电电压 (Vsup):3 V
标称供电电压 (Vsup):5 V表面贴装:YES
技术:CMOS温度等级:INDUSTRIAL
端子形式:GULL WING端子节距:1.27 mm
端子位置:DUAL宽度:7.5 mm
Base Number Matches:1

MM74C922WM 数据手册

 浏览型号MM74C922WM的Datasheet PDF文件第2页浏览型号MM74C922WM的Datasheet PDF文件第3页浏览型号MM74C922WM的Datasheet PDF文件第4页浏览型号MM74C922WM的Datasheet PDF文件第5页浏览型号MM74C922WM的Datasheet PDF文件第6页浏览型号MM74C922WM的Datasheet PDF文件第7页 
October 1987  
Revised April 2001  
MM74C922 MM74C923  
16-Key Encoder 20-Key Encoder  
General Description  
Features  
The MM74C922 and MM74C923 CMOS key encoders pro-  
vide all the necessary logic to fully encode an array of  
SPST switches. The keyboard scan can be implemented  
by either an external clock or external capacitor. These  
encoders also have on-chip pull-up devices which permit  
switches with up to 50 kon resistance to be used. No  
diodes in the switch array are needed to eliminate ghost  
switches. The internal debounce circuit needs only a single  
external capacitor and can be defeated by omitting the  
capacitor. A Data Available output goes to a high level  
when a valid keyboard entry has been made. The Data  
Available output returns to a low level when the entered  
key is released, even if another key is depressed. The Data  
Available will return high to indicate acceptance of the new  
key after a normal debounce period; this two-key roll-over  
is provided between any two switches.  
50 kmaximum switch on resistance  
On or off chip clock  
On-chip row pull-up devices  
2 key roll-over  
Keybounce elimination with single capacitor  
Last key register at outputs  
3-STATE output LPTTL compatible  
Wide supply range: 3V to 15V  
Low power consumption  
An internal register remembers the last key pressed even  
after the key is released. The 3-STATE outputs provide for  
easy expansion and bus operation and are LPTTL compat-  
ible.  
Ordering Code:  
Order Number  
MM74C922WM  
MM74C922N  
Package Number  
M20B  
Package Description  
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide  
18-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide  
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide  
20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide  
N18B  
MM74C923WM  
MM74C923N  
M20B  
N20A  
Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.  
Connection Diagrams  
Pin Assignment for DIP  
Pin Assignment for SOIC  
Top View  
MM74C922  
Top View  
MM74C922  
© 2001 Fairchild Semiconductor Corporation  
DS006037  
www.fairchildsemi.com  

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