Part # MAX6846-MAX6849 datasheet

Part Manufacturer: Maxim


Part Description: MAX6846-49 DS

Part Details:

19-2947; Rev 1; 11/05 Low-Power, Adjustable Battery Monitors with Hysteresis and Integrated µP Reset MAX6846­MAX6849 General Description Features The MAX6846­MAX6849 are a family of ultra-low-power User-Adjustable Thresholds for Monitoring battery monitors with integrated microprocessor (µP) Single-Cell Li+ or Multicell Alkaline/NiCd/NiMH supervisors. The user-adjustable battery monitors are Applications offered with single or dual low-battery output options thatcan be used to signal when the battery is OK (enabling Single and Dual Low-Battery Output Options full system operation), when the battery is low (for low- Independent µP Reset with Manual Reset power system operation), and when the battery is dead(to disable system operation). These devices also have Factory-Set Reset Thresholds for Monitoring 1.8V an independent µP supervisor that monitors VCC and to 3.3V Systems provides an active-low reset output. A manual reset Available with 150ms (min) or 1.2s (min) V function is available to reset the µP with a pushbutton. CC Reset Timeout Period Options The MAX6846­MAX6849 are ideal for single-cell lithium-ion (Li+) or multicell alkaline/NiCd/NiMH applications. 150ms (min) LBO Timeout Period When the battery voltage drops below each adjusted low Immune to Short-Battery Voltage Transients threshold, the low-battery outputs are asserted to alertthe system. When the voltage rises above the adjusted Low Current (2.5µA, typ at 3.6V) high thresholds, the outputs are deasserted after a -40°C to +85°C Operating Temperature Range 150ms minimum timeout period, ensuring the voltageshave stabilized before power circuitry is activated or pro- Small 8-Pin SOT23 Packages viding microprocessor reset timing. These devices have user-adjustable battery threshold Ordering Information voltages, providing a wide hysteresis range to prevent PART TEMP RANGE PIN-PACKAGE chattering that can result due to battery recovery afterload removal. Single low-battery outputs are supplied MAX6846KA_D_-T -40°C to +85°C 8 SOT23-8 by the MAX6846/MAX6847 and dual low-battery out- MAX6847KA_D_-T -40°C to +85°C 8 SOT23-8 puts are supplied by the MAX6848/MAX6849. All bat- MAX6848KA_D_-T -40°C to +85°C 8 SOT23-8 tery monitors have open-drain low-battery outputs.

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MAX6846-MAX6849.pdf Datasheet