Push Button Telephone Dialers

FEATURES: AY-5-9151A . 2.5V to 5V and 200μA operation, plus standby mode Frequency of on-chip clock set by external RC network Selectable break: make ratio and interdigital pause Uses 3 x 4 matrix keyboard with no keyboard ground or common contact Keyboard inputs have antibounce protection

Push Button Telephone Dialers

FEATURES: AY-5-9151A . 2.5V to 5V and 200μA operation, plus standby mode Frequency of on-chip clock set by external RC network Selectable break: make ratio and interdigital pause Uses 3 x 4 matrix keyboard with no keyboard ground or common contact Keyboard inputs have antibounce protection

Push Button Telephone Dialers

FEATURES: AY-5-9151A . 2.5V to 5V and 200μA operation, plus standby mode Frequency of on-chip clock set by external RC network Selectable break: make ratio and interdigital pause Uses 3 x 4 matrix keyboard with no keyboard ground or common contact Keyboard inputs have antibounce protection