MM74C922WM ,16-Key EncoderMM74C922 • MM74C923 16-Key Encoder 20-Key EncoderOctober 1987Revised April 2001MM74C922 MM74C92 ..
MM74C922WMX ,16-Key EncoderMM74C922 • MM74C923 16-Key Encoder 20-Key EncoderOctober 1987Revised April 2001MM74C922 MM74C92 ..
MM74C923N ,20-Key EncoderMM74C922 • MM74C923 16-Key Encoder 20-Key EncoderOctober 1987Revised April 2001MM74C922 MM74C92 ..
MM74C923WM ,20-Key EncoderMM74C922 • MM74C923 16-Key Encoder 20-Key EncoderOctober 1987Revised April 2001MM74C922 MM74C92 ..
MM74C925N ,4-Digit Counters with Multiplexed 7-Segment Output DriversMM74C925 • MM74C926 4-Digit Counters with Multiplexed 7-Segment Output DriversOctober 1987Revised J ..
MM74C926N ,4-Digit Counters with Multiplexed 7-Segment Output DriversFunctional DescriptionReset — Asynchronous, active high Segment Output — Current sourcing with 40 ..
MN3711CFP ,Image Pickup DevicesPin DescriptionsPin No. Symbol Pin No. SymbolDescriptions DescriptionsOD1 Output drain 8 Sub Substr ..
MN3711CFP ,Image Pickup DevicesAbsolute Maximum Ratings and Operating ConditionsNote 2) Note 1)Rating Operating conditionParameter ..
MN3716AT ,Image Pickup DevicesCCD Area Image SensorMN3716FT,MN3716AT6mm (type-1/3) 512H High-Responsivity CCD Area Image Sensorsn ..
MN3716FT ,Image Pickup DevicesPin DescriptionsPin No. Symbol Descriptions Pin No. Symbol Descriptions1 OD Output drain 11 PT P-we ..
MN3716MFE ,Image Pickup DevicesAbsolute Maximum Ratings and Operating ConditionsNote 2) Note 1)Rating Operating conditionParameter ..
MN3718AT ,Image Pickup DevicesCCD Area Image SensorMN3718FT,MN3718AT6.0mm (type-1/3) 768H CCD Area Image Sensorsn OverviewThe MN3 ..
MM74C922N-MM74C922WM-MM74C922WMX-MM74C923N-MM74C923WM
16-Key Encoder
MM74C922 • MM74C923 16-Key Encoder 20-Key Encoder October 1987 Revised April 2001 MM74C922 MM74C923 16-Key Encoder 20-Key Encoder General Description Features The MM74C922 and MM74C923 CMOS key encoders pro-50 kΩ maximum switch on resistance vide all the necessary logic to fully encode an array ofOn or off chip clock SPST switches. The keyboard scan can be implemented On-chip row pull-up devices by either an external clock or external capacitor. These 2 key roll-over encoders also have on-chip pull-up devices which permit switches with up to 50 kΩ on resistance to be used. NoKeybounce elimination with single capacitor diodes in the switch array are needed to eliminate ghostLast key register at outputs switches. The internal debounce circuit needs only a single 3-STATE output LPTTL compatible external capacitor and can be defeated by omitting the Wide supply range: 3V to 15V capacitor. A Data Available output goes to a high level Low power consumption 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 compat- ible. Ordering Code: Order Number Package Number Package Description MM74C922WM M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide MM74C922N N18B 18-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide MM74C923WM M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide MM74C923N N20A 20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide 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 Top View MM74C922 MM74C922 © 2001 DS006037
