Mega Source Elec.Limited
| Packaging Details | Contact for Sample |
| Delivery Time | Within 3days |
| Payment Terms | T/T in advance, Paypal, Western Union |
| Supply Ability | 5000 |
| Place of Origin | PHILIPPINE |
| Brand Name | Fairchild Semiconductor |
| Certification | Lead free / RoHS Compliant |
| Model Number | MM74C922WMX |
View Detail Information
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Product Specification
| Packaging Details | Contact for Sample | Delivery Time | Within 3days |
| Payment Terms | T/T in advance, Paypal, Western Union | Supply Ability | 5000 |
| Place of Origin | PHILIPPINE | Brand Name | Fairchild Semiconductor |
| Certification | Lead free / RoHS Compliant | Model Number | MM74C922WMX |
| High Light | programmable ic chips ， ic integrated circuits | ||
Quick Detail:
16-Key Encoder 20-Key Encoder
Description:
The MM74C922 and MM74C923 CMOS key encoders provide 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 kΩ on 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.
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 compatible.
Applications:
■ 50 kΩ maximum 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
Specifications:
|
Datasheets |
MM74C922,923WM |
|
Product Photos |
20-SOIC 0.295 |
|
Standard Package |
1,000 |
|
Category |
Integrated Circuits (ICs) |
|
Family |
Logic - Signal Switches, Multiplexers, Decoders |
|
Series |
74C |
|
Packaging |
Tape & Reel (TR) |
|
Type |
16-Key Encoder |
|
Circuit |
1 x 8:4 |
|
Independent Circuits |
1 |
|
Current - Output High, Low |
15mA, 16mA |
|
Voltage Supply Source |
Single Supply |
|
Voltage - Supply |
3 V ~ 15 V |
|
Operating Temperature |
-40°C ~ 85°C |
|
Mounting Type |
Surface Mount |
|
Package / Case |
20-SOIC (0.295", 7.50mm Width) |
|
Supplier Device Package |
20-SOIC |
Competitive Advantage:
Warranty :180 days !
Free shipping: Order over $1000 win a free shipment fee
(goods weight below 3Kg) ,during 20130901-20130930 .
Why buy from us >>> Fast / Safely / Conveniently
• Mega Source is a Stock keeper and trade company of Electronic components .Our branches office include China, Hong Kong, Sigapore , Canada . Offer business, service, resourcing and information for our global member.
• Goods are ensured the highest quality possible and are delivered to our customers all over the world with speed and precision.
How to buy >>>
• Contact us by email & sent your inquire with your Transport destination .
• Online chat, the commissioner would be responded ASAP.
Service >>>
• Forwarder Shipment to world-wide, DHL ,TNT ,UPS,FEDEX etc. buyer don`t need to worry about shipping problem
• We will try to respond as quickly as possible. But due to time zone difference, please allow up to 24 hours to get your mail replied. The products were tested by some devices or software, we ensure that there is no quality problems.
• We are committed to providing fast, convenient and safe transportation service to global buyer.
Company Details
Business Type:
Manufacturer,Distributor/Wholesaler,Agent,Exporter,Trading Company,Seller,Other
Year Established:
2004
Total Annual:
800 million-900 million
Employee Number:
50~60
Ecer Certification：
Active Member
Mega Source Elec. Limited is a leading independent electronic components supplier and distributor since 2004.Mega Source Elec. Limited has been specialized in providing Original Equipment Manufacturers (OEMs) and Contract Electronic Manufacturers (CEMs) which is hard to find, obsolete and hot sales ... Mega Source Elec. Limited is a leading independent electronic components supplier and distributor since 2004.Mega Source Elec. Limited has been specialized in providing Original Equipment Manufacturers (OEMs) and Contract Electronic Manufacturers (CEMs) which is hard to find, obsolete and hot sales ...
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