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MAX1259C/D Datasheet(PDF) 1 Page - Maxim Integrated Products |
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MAX1259C/D Datasheet(HTML) 1 Page - Maxim Integrated Products |
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1 / 8 page  General Description The MAX1259 battery manager provides backup-battery switching for CMOS RAM, microprocessors, or other low- power logic ICs. It automatically switches to the backup battery when the primary power supply is interrupted. Low-loss switches guarantee an input-to-output differ- ential of only 200mV while supplying 250mA from the primary power supply or 15mA from the battery. Battery discharge during shipping does not occur in the MAX1259, since the backup battery can be disconnected by strobing the RST input. A battery-fail output signal indicates when the backup bat- tery is below +2V, and a power-fail output signal indicates when the primary power supply is low. The MAX1259 monitors the backup battery, warns of impending power failures, and switches the memory to the battery when failures occur. The MAX1259 is pincompatible with the DS1259, but consumes three times less supply current. Commercial, extended, and military temperature range devices are available. Applications ● Battery Backup for CMOS RAM ● Uninterruptible Power Supplies ● Computers ● Controllers Features ● Switches to Backup Battery if Power Fails ● Consumes Less than 100nA of Battery Current ● Power-Fail Output Signals Primary Power-Supply Loss ● Battery Monitor Indicates Low Battery ● Battery Can Be Disconnected to Prevent Discharge During Shipping ● Battery Automatically Reconnected when VCC is Applied ● Pin-Compatible with the DS1259 ● Supply Current Three Times Lower than DS1259 ● Available in Extended-Industrial and Military Temperature Ranges 19-4638; Rev 3; 9/14 *Contact factory for dice specifications. Note: Devices in PDIP and SO packages are available in both leadedPb) and lead(Pb)-free packaging. Specify lead-free by adding the “+” symbol at the end of the part number when ordering. Lead-free not available for CERDIP package. PART TEMP RANGE PIN-PACKAGE MAX1259C/D 0°C to +70°C Dice* MAX1259CPE 0°C to +70°C 16 PDIP MAX1259CWE 0°C to +70°C 16 Wide SO MAX1259EPE -40°C to +85°C 16 PDIP MAX1259EWE -40°C to +85°C 16 Wide SO MAX1259MJE -55°C to +125°C 16 CERDIP VCCI VCCO VBATT RESET LOGIC GND BAT RST PF BF REF MAX1259 DIP/SO VCCI VCCO VCCO VCCI V N.C. BF N.C. N.C. MAX1259 1 2 3 4 16 15 14 13 BAT RST GND GND N.C. N.C. PF 5 6 7 8 12 11 10 9 BATT TOP VIEW MAX1259 Battery Manager Functional Diagram Pin Configuration Ordering Information |
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