SUMMIT Microelectronics: Product Summary: SMS45

PRELIMINARY INFORMATION¹

SMS45

Quad Programmable Precision Cascade Sequencer and Supervisory Controller (SMS45 with 4k-Bit Nonvolatile Memory)

FEATURES Operational from any of four Voltage Monitoring Inputs Programmable Power-up Cascade Sequencing Programmability allows monitoring any voltage between 0.6V and 5.6V with no external components Programmable 5mV steps in the low range Programmable Watchdog Timer Programmable Reset Pulse Width Programmable Nonvolatile Combinatorial Logic for generation of Reset Fault Status Register 4k-Bit Nonvolatile Memory (SMS45 only)

APPLICATIONS Desktop/Notebook/Tablet Computers Multi-voltage Systems Telecom/Network Servers Portable Battery-powered Equipment Set-top Boxes Data-storage Equipment

INTRODUCTION The SMS45 is a nonvolatile user-programmable voltage supply cascade sequencer and supervisory circuit designed specifically for advanced systems that need to monitor multiple voltages. The SMS45 can monitor four separate voltages without the need of any external voltage divider circuitry unlike other devices that need factory trimmed threshold voltages and external components to accommodate different supply voltages and tolerances. This unit can also be used to enable DC/DC converters or LDOs to provide a closed loop cascading of the supplies during power -up. The SMS45 watchdog timer has a user programmable time-out period and it can be placed in an idle mode for system initialization or system debug. All of the functions are user accessible through an industry standard I2C 2-wire serial interface. Programming of configuration, control and calibration values by the user is simplified with the SMX3200 interface adapter and Windows GUI software obtainable from Summit Microelectronics. [continued in the SMS45 PDF]     SMS45 ORDERING INFORMATION