Vm6320 series is approved with various patents:
Layout, application, and invention patent;
working voltage 2.4V ~ 5.5V
Built in voltage stabilizing circuit provides stable voltage for circuit use
Built in low voltage reset (LVR) function
Working current @ VDD = 3V, typical value 8ua, maximum value 10uA
Output response time: touch 46ms in ear detection 180ms@VDD=3V
Sensitivity can be adjusted by external capacitance (1 ~ 50pF)
Touch and in ear detection is od open drain output, effective at low level