MAX801

The MAX801/MAX808 microprocessor (P) supervisory circuits monitor and control the activities of +5V Ps by providing backup-battery switchover, low-line indication,and P reset. Additional features include a watchdog for the MAX801 and CMOS RAM write protection for the MAX808.The MAX801/MAX808 offer a choice of reset-threshold voltage (denoted by suffix letter): 4.675V (L), 4.575V(N), and 4.425V (M). These devices are available in 8-pin DIP and SO packages.

Features of the MAX801/MAX808 are:(1)Precision Voltage Monitoring, ±1.5% Reset Accuracy; (2) 200ms Power-OK/Reset Time Delay; (3)RESET Output (MAX808) RESET and RESET Outputs (MAX801); (4)Watchdog Timer (MAX801); (5)On-Board Gating of Chip-Enable Signals (MAX808):Memory Write-Cycle Completion ,3ns CE Gate Propagation Delay; (6).1A Standby Current; (7).Power Switching:250mA in VCC Mode,20mA in Battery-Backup Mode; (8) MaxCap./SuperCap. Compatible; (9).RESET Guaranteed Valid to VCC = 1V; (10).Low-Line Threshold 52mV Above Reset Threshold.

The absolute maximum ratings of the MAX801/MAX808 can be summarized as:(1)Input Voltage (with respect to GND):VCC.:0.3V to +6V,VBATT:-0.3V to +6V,All Other Pins:-0.3V to (VOUT + 0.3V); (2)Input Current:VCC Peak :1.0A,VCC Continuous :500mA,IBATT Peak:250mA,IBATT Continuous :50mA,GND:50mA,All Other Inputs :50mA; (3)Output Current OUT Peak.:1.0A,OUT Continuous:500mA,All Other Outputs :50mA; (4)Continuous Power Dissipation (TA = +70°C):Plastic DIP (derate 9.09mW/°C above +70°C):727mW,SO (derate 5.88mW/°C above +70°C):471mW,CERDIP (derate 8.00mW/°C above +70°C):640mW; (5)Operating Temperature Ranges:MAX801_C_A/MAX808_C_A:0°C to +70°C,MAX801_E_A/MAX808_E_A :-40°C to +85°C,MAX801_MJA/MAX808_MJA:-55°C to +125°C; (6)Storage Temperature Range :-65°C to +160°C; (7)Lead Temperature (soldering, 10sec) :+300°CIf you want to know more information such as the electrical characteristics about the BF904, please download the datasheet in www.seekic.com or www.chinaicmart.com.