(China (Mainland))
Product Summary
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The MM74C923 CMOS key encoder provides all the necessary logic to fully encode an array of SPST switches. The keyboard scan of the MM74C923 can be implemented by either an external clock or external capacitor. The MM74C923 also havs on-chip pull-up device which permits witches with up to 50 kΩ; on resistance to be used.
Parametrics
MM74C923 absolute maximum ratings: (1) Voltage at Any Pin: Vcc -0.3V to Vcc +0.3V; (2) Operating Temperature Range: -40°C t0 +85°C; (3) torage Temperature Range: -65°C to +150°C; (4) Power Dissipation (P D) Dual -In-Line: 700wM; (5) Operating VCC Range: 3V to 15V, VCC: 18V ; (6) Lead Temperature (Soldering, 10 seconds) : 260°C.
Features
MM74C923 features: (1) 50k?, maximum switch on resistance; (2) On or off chip clock On-chip row pull-up devices; (3) 2 key roll-over; (4) Keybounce elimination with single capacitor; (5) Last key register at utputs; (6) 3-STATE output LPTTL compatible; (7) Wide supply range: 3V to 15V; (8) Low power consumption.
Diagrams
| Image | Part No | Mfg | Description |  |
Pricing (USD) |
Quantity | ||||
|---|---|---|---|---|---|---|---|---|---|---|
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 MM74C923WM |
Fairchild Semiconductor |
Encoders, Decoders, Multiplexers & Demultiplexers 20-Key Encoder |
Data Sheet |
Negotiable |
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MM74C923WM_Q |
Fairchild Semiconductor |
Encoders, Decoders, Multiplexers & Demultiplexers 20-Key Encoder |
Data Sheet |
Negotiable |
|
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MM74C923WMX |
Fairchild Semiconductor |
Encoders, Decoders, Multiplexers & Demultiplexers 20-Key Encoder |
Data Sheet |
Negotiable |
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