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MAX6841DUKD3 Datasheet(PDF) 1 Page - Maxim Integrated Products |
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MAX6841DUKD3 Datasheet(HTML) 1 Page - Maxim Integrated Products |
1 / 9 page General Description The MAX6841–MAX6845 microprocessor (µP) supervi- sory circuits monitor ultra-low-voltage power supplies in µP and digital systems. They provide excellent circuit reliability at low cost by eliminating external compo- nents and adjustments when used with +0.9V to +1.5V systems. Factory-trimmed reset thresholds are avail- able for the MAX6841/MAX6842. The MAX6843/ MAX6844/MAX6845 provide a RESET IN input, allowing the user to externally adjust the reset threshold. The MAX6841–MAX6845 family features a debounced man- ual reset input (MR). The reset comparator is designed to ignore fast transients on VCC. The MAX6841–MAX6845 assert a reset signal whenev- er the VCC supply voltage declines below a preset or adjustable threshold or whenever manual reset (MR) is asserted. Reset remains asserted for a fixed timeout delay after VCC has risen above the reset threshold and when manual reset is deasserted. Five timeout periods are available for each part: 150µs (voltage detector ver- sion), 1.5ms, 30ms, 210ms, and 1.68s (typ). The MAX6841/MAX6843 have an active-low push-pull reset output. The MAX6841/MAX6842/MAX6844 have an active-high push-pull reset output, and the MAX6842/MAX6845 have an active-low open-drain reset output. The active-low open-drain reset output requires a pullup resistor that can be connected to a voltage from 0 to VCC. The low supply current (5.7µA) and small package (SOT23-5) make the MAX6841–MAX6845 ideal for use in portable equipment. Applications Computers Controllers Intelligent Instruments Critical µP and µC Power Monitoring Portable/Battery-Powered Equipment Telecom/Networking Equipment Basestations Servers/Workstations Features o Factory-Set Reset Threshold Voltages for Monitoring Supplies from 0.9V to 1.5V (MAX6841/MAX6842) o Adjustable Threshold RESET IN (MAX6843/MAX6844/MAX6845) o Low Power Consumption: 5.7µA (typ) o ±2.5% Reset Threshold Accuracy Over Temperature o Five Timeout Periods: 150µs (Voltage Detector Version), 1.5ms, 30ms, 210ms, and 1.68s o Available in Three Output Configurations Push-Pull RESET Push-Pull RESET Open-Drain RESET o Guaranteed Reset Valid to VCC = 0.55V (Active Low) o Manual Reset Input o Immune to Short VCC Transients o Space-Saving 5-Pin SOT23 Package Ultra-Low-Voltage µP Reset Circuits and Voltage Detectors ________________________________________________________________ Maxim Integrated Products 1 Ordering Information 19-2625; Rev 1; 2/03 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. Selector Guide and Typical Operating Circuit appear at end of data sheet. PART TEMP RANGE PIN-PACKAGE MAX6841_UKD_-T -40 °C to +85°C 5 SOT23-5 MAX6842_UKD_-T -40 °C to +85°C 5 SOT23-5 MAX6843UKD_-T -40 °C to +85°C 5 SOT23-5 MAX6844UKD_-T -40 °C to +85°C 5 SOT23-5 MAX6845UKD_-T -40 °C to +85°C 5 SOT23-5 GND RESET 15 VCC MAX6841 MAX6842 SOT23-5 TOP VIEW 2 34 RESET MR ( ) ARE FOR 6844 GND RESET IN 15 VCC MAX6843 MAX6844 MAX6845 SOT23-5 2 34 RESET (RESET) MR Pin Configurations Note: Insert desired suffix letter (from the Threshold Suffix Guide and the Active Timeout Period tables) into the blanks to com- plete the part number. For example, the MAX6842GUKD1 has a reset threshold of 1.11V and a typical reset timeout period of 1.5ms. Sample stock is generally available on standard versions only (see the Standard Versions table). Standard versions require a minimum order increment of 2.5k units. Nonstandard versions must be ordered in 10k-unit increments. Contact factory for availability. All parts are offered in tape-and-reel only. |
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