SA56600-42

The SA56600-42 is designed to protect SRAM data in computer systems during periods of sagging power supply voltages and power outages. When the power supply voltage drops to typically 4.2 V, the CS output goes to a logic LOW state pulling CE to a LOW state, disabling the SRAM device. In addition, a reset logic LOW is asserted for system use. If the supply voltage drops further, to 3.3 V typically or lower, the SA56600-42 switches the system's operation from the main power supply source to the Lithium back-up battery. As the main supply is restored and the voltage rises to 3.3 V or higher, the SRAM support voltage transfers from the Lithium back-up battery to the main supply. When the main supply voltage rises to greater than typically 4.2 V, the CS output goes to a logic HIGH state for SRAM CE control. Reset assertion is released and normal operation is resumed. SA56600-42 ensures reliable preservation of SRAM data during periods of supply deficiency and interruptions.

The SA56600-42 is offered in the SO8 surface mount package.