Product Summary

The TMP82C79P-2 is a programmable keyboard/display interface. The keyboard portion can provide a scanned interface up to 64-contact key matrix. Also, the keyboard portion can interface to an array of sensors or a strobed interface keyboard. Key depressions can be 2-key lockout or N-key rollover. The display portion has 16 × 8 bits display RAM which can be treated as dual 16 × 4 bits. Both right entry and left entry display formats are possible.

Parametrics

TMP82C79P-2 absolute maximum ratings: (1)VCC supply voltage: -0.5 to 7V; (2)input voltage: -0.5 to VCC+0.5V; (3)output voltage: -0.5 to VCC+0.5V; (4)power dissipation: 250mW; (5)soldering temperature: 260℃; (6)storage temperature: -65 to 150℃; (7)operating temperature: -40 to +85℃.

Features

TMP82C79P-2 features: (1)simultaneous keyboard display operation; (2)scanned keyboard mode; (3)scanned sensor matrix mode; (4)strobed input entry mode; (5)built-in 8-character FIFO or 64 bit sensor RAM; (6)built-in 16×8 bit display RAM; (7)programmable scan timing; (8)extend operating temperature range from -40℃ to +85℃.

Diagrams

TMP82C79P-2  block diagram

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