The ET6304 is a dual SIM card control chip optimized for GSM handsets. It supports both 1.8V and 3V SIM cards. A serial
port interface (I2C) is used to control dual SIM channel individually. The ET6304 has an integrated detection of SIM card
presence function, including battery detection and contact detection in a directly user accessible card slots. If the SIM card
is pulled out, ET6304 can immediately and automatically shutdown the corresponding SIM card interface. When the SIM
card is inserted, ET6304 can immediately notify the baseband chip to execute activation process.
The ET6304 is available in 20pin 3mm x 3mm QFN package. The operating temperature range is from 25°C to +85°C.
Control and communication through a I2C interface with base band processor
Independent 1.8V/3V VCC control for each SIM card
Power management and control for dual SIM cards
Independent clock stop mode (at high or low level) for each SIM card
Detection logic for two SIM cards removal or insertion
Battery presence detection logic
20Pin 3mm x 3mm QFN Package (ET6304Y)
Support dual SIM card interface
GSM, Edge, GPRS and 3G Cellular Phones