BS801B Datasheet | Holtek Semiconductor

Features - Operating voltage: 2.2V~5.5V - Ultra low standby current: 1.5m A 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 mand - Open drain NMOS output - Key status monitored using pins or serial bus General Description The BS801B/02B/04B/06B/08B are a range of 1 to 8 key touch key devices which can detect human body contact using external touch pads. The high level of device integration enable applications to be implemented with a minimum number of external ponents. The BS804B and BS808B are equipped with a One-line serial interface to allow easy munication with an external MCU for device setup and for touch pin monitoring purposes. Special internal circuitry is also employed to ensure excellent power noise rejection to reduce the possibility of false detections, increasing the touch switch application reliability under adverse environmental conditions. With auto-calibration, low standby current and a choice of wake-up features , this range of touch key devices provides a simple and effective means of implementing touch switches in a wide variety of applications. Selection Table Standby Current at 3V Part. No. Touch Keys One-Key Wake-up 1.5m A ¾ Any-key Wake-up ¾ 2.0m A Key Output Type Level-Hold or Toggle Level-Hold or Toggle ¾ BS804B .. BS806B BS808B 4-Key 1.5m A 1.5m A 1.5m A 3.0m A 4.0m A 5.0m A Level-Hold or Toggle Level-Hold ¾ Level-Hold Package Serial Interface ¾ ¾ Auto Calibration BS801B BS802B 1-Key 2-Key SOT23-6 8SOP 8SOP 16NSOP 16NSOP 16NSOP 20SOP/SSOP Ö ¾ Ö ¾ Ö 6-Key 8-Key Rev. 1.00 July 7, 2009 BS801B/02B/04B/06B/08B Pin Assignment K e y 0 1 2 3 4 5 6 7 8 B S 8 0 4 B 1 6 N S O P -A K e y 1 L H F 6 V D D 5 C re f 4 T o p V ie w 1 2 3 K e y 0 1 8 2 7 3 6 4 5 B S 8 0 2 B 8 S O P -A K o u t1 K o u t0 V S S C re f K e y 1 V D D L H F K e y 1 1 8 2 7 3 6 4 5 B S 8 0 4 B 8 S O P -A K e y 2 K e y 3 C re f K e y 0 S C D V D...