Date: 25/08/2009

Holtek's new BS80xB touch switch series for small household appliances

Holtek has announced the release of its new touch switch series devices, the BS801B, BS802B, BS804B, BS806B and BS808B are a range of 1 to 8 key touch key devices. The high level of its device integration enable applications to be implemented with a minimum number of external components, and are suitable for small household appliance touch switch solutions that includes electric hobs, electric fans, food processors, chargers, vacuum cleaners, extractors, disinfecting machines etc

Key features are,

Operating voltage: 2.2V~5.5V
Ultra low standby current: 1.5uA at 3V
Auto-calibration
High reliability touch detections
High PSRR
Output type: Level-hold or Toggle
One-key or Any-key Wake-up Mode
Wake-up Mode set by pins or serial command
Open drain NMOS output
Key status monitored using pins or serial bus
Operating temperature range: 40°C to 85°C

The touch switch sensitivity can be adjusted with a single capacitor, and they also include a single line interface for transmission of the switch status. At fixed intervals the switch parameters will be renewed automatically.

For more details visit www.holtek.com