MC33884/D

The MC33884 Switch Monitor Interface is a monolithic siliconintegrated circuit (IC) that performs switch monitoring functions.The MC33884 provides efficient interface between electrical switchesand low voltage microprocessors. The MC33884 supplies switchcontact pullup and pulldown current while monitoring the inputvoltage level. All inputs are protected for transients whenimplemented with an appropriate static discharge capacitor usedon the inputs.

Features of the MC33884 are:(1)Full Operation with 7.0 V VPWR 26 V, Limited Operation with 5.5 V VPWR 7.0 V; (2)Input Voltage Range: 14 V to 40 V; (3) Interfaces Directly to Microprocessors Using SPI Protocol; (4)24Lead Wide Body SOIC Package; (5)Wakeup on Change of Monitored Switch Status; (6)Programmable Wetting Current; (7)4 Programmable Inputs to Monitor 4 SwitchtoBattery or4 SwitchtoGround Switches; (8)6 (fixed function) Inputs to Monitor 6 SwitchtoGround Switches; (9)2 (fixed function) Inputs to Monitor ; (10) SwitchtoBattery Switches; (11)Standby Current During Normal Mode = 100 mA; (12) Quiescent Current in Sleep Mode < 10 mA? Reset (RST) Input Defaults the Device to Sleep Mode; (13)Active Interrupt (INT) on Change of Switch State in Normal Mode; (14) 4 Modes of Operation(Sleep, Normal, Polling, Polling + INT Timer)? Designed to Operate 40°C TA 105°C.

The absolute maximum ratings of the MC33884 can be summarized as:(1)VDD Supply Voltage: 0.3 to 7.0VDC; (2)CSB, SI, SO, SCLK, RSTB, MASL, SYNC, INTB :-0.3 to 7.0VDC; (3)VPWR Supply Voltage :-16 to 50VDC; (4)Switch Input Voltage Range:-14 to 40VDC; (5)Recommended Frequency of SPI Operation:3.0MHz; (6)ESD Voltage Human Body Model:4000V; (7)Storage Temperature:55 to 150°C; (8)Operating Case Temperature:40 to 105°C; (9)Operating Junction Temperature:40 to 150°C; (10)Lead Soldering Temperature (Note 7)TSolder:260°C; (11)Maximum Junction Temperature:-40 to 150°C; (12)Thermal Resistance, JunctiontoAmbientPlastic Package, 24 SOIC, Case 751E:PqJA107°C/W. If you want to know more information such as the electrical characteristics about the MC33884, please download the datasheet in www.seekic.com or www.chinaicmart.com.