Go to main content

Jameco Electronics

Customer Care  1-800-831-4242

You are here: Home >> ICs & Semiconductors >> Logic, CMOS >> 74C Series

C

16 Key Keyboard Encoder DIP-18

View 74C922: 16 Key Keyboard Encoder DIP-18 50 KΩ Maximum Switch on Resistance

74C922: 16 Key Keyboard Encoder DIP-18 50 KΩ Maximum Switch on Resistance


Image is representative only
Jameco Part no. 44564
Manufacturer   MAJOR BRANDS
Manufacturer no. 74C922
Catalog 142 , page 3
Learn more about Major Brands.
Pricing & Availability

$8.95

# of Unit Price
1+ $8.95
10+ $7.95
100+ $7.25
  • Availability:Ship  2 Days ARO 

 Add to cart

16-Key Keyboard Encoder DIP-18

The MM74C922 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.

Features

  • 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



    Report a problem
    Suggest a product
  • No specifications are available at this time. Call for more information.

    Report a problem
    Suggest a product
    Free Friday

    RELATED PRODUCTS

    20 Key Keyboard Encoder DIP-20

    Buy Now  $7.95


    4-DIGIT COUNTER WITH 7-SEGMENT OUTPUT DRIVER DIP-18

    Buy Now  $12.95


    DUAL MULTISTABLE MULTIVIBRATOR DIP-16

    Buy Now  $3.95

    Copyright ©2002 - 2014 Jameco. All Rights Reserved.