TTP229 16 Key Capacitive Keypad View larger

TTP229 16 Key Capacitive Keypad

HCMODU0079

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This 16 key capacitive touch keypad is based on the TTP229 capacitive sensor with accurate sensing of up to 16 points. Using this keypad provides a solid state alternative to mechnical type keypads providing the advantage of greater durability especially in dusty environments.

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This 16 key capacitive touch keypad is based on the TTP229 capacitive sensor with accurate sensing of up to 16 points. Using this keypad provides a solid state alternative to mechnical type keypads providing the advantage of greater durability especially in dusty environments. They kaypad can also be configured in different modes providing various key group options upto 16 independent keys. Outs 1 to 8 on the header connector mimic the sates of the first 8 keys. When is 16 key mode the state of all 16 keys can be read via its 2 wire serial interface. Please see out example Arduino sketch or datasheet for more information on how read the key states via the serial interface.

Please note: By default the keypad is in 8 key mode. To configure it to 16 key mode you will need to link pads TP2 together (see diagram).



Image

Product Code: HCMODU0079
Operating voltage2.4V~5.5V
Built-in regulator
Stand-by current At 3V, and sleep mode slow sampling rate 8Hz
=> Typical 2.5uA for 16 input keys
=> Typical 2.0uA for 8 input keys
8 Key or 16 key modes
Separate outputs to 8 keys in 8 key mode
2 wires serial output interface for both 16 key and 8 key mode
Outputs can be set to CMOS/OD/OC with active high/low
2 Wires serial interface can select active high or low by option
Optional Multi-key or single-key
Provides two kinds of sampling rate: slow sampling rate 8Hz and fast sampling rate 64Hz at sleep mode
Optional maximum key-on time about 80sec
Auto calibration at power up (keypad must not be touched for 0.5 seconds after power up)
Auto calibration for changes in environment

Pinout, diagrams, example Arduino sketch and PDF's available on our support forum here.

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