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MAX6856UK16D3 Datasheet(PDF) 1 Page - Maxim Integrated Products |
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MAX6856UK16D3 Datasheet(HTML) 1 Page - Maxim Integrated Products |
1 / 17 page General Description The MAX6854/MAX6855/MAX6856/MAX6858/MAX6860– MAX6869 ultra-low-current (170nA, typ) microprocessor (µP) supervisory circuits combine voltage monitoring, watchdog timer, and manual reset input functions in a 5- pin SOT23 package. These devices assert a reset signal whenever the monitored voltage drops below the factory- trimmed reset threshold voltage, manual reset is assert- ed, or the watchdog timer expires. The reset output remains asserted for a minimum timeout period after VCC rises above the reset threshold and manual reset is deasserted. Factory-trimmed reset threshold voltages are offered from +1.575V to +4.625V in approximately 100mV increments (see the Threshold Suffix Guide). Each device is offered with six minimum reset timeout options, ranging from 10ms to 1200ms. The MAX6854/MAX6855/MAX6856/MAX6858/MAX6860– MAX6869 are offered in a variety of configurations (see the Selector Guide). The MAX6854/MAX6855/MAX6856/ MAX6861–MAX6869 provide a manual reset input, MR. The MAX6864–MAX6869 offer a watchdog timer that monitors activity at the WDI input to prevent code execu- tion errors. The MAX6864–MAX6869 offer watchdog timeout options of 3.3s or 209s (typ). The MAX6861/ MAX6862/MAX6863 feature a pin-selectable reset delay period of 10ms or 150ms (min). Push-pull active-low, push-pull active-high, and open-drain active-low reset outputs are available. Applications Portable/Battery-Powered Equipment PDAs/Cell Phones MP3 Players/Pagers Glucose Monitors/Patient Monitors Features ♦ Ultra-Low 170nA (typ) Supply Current ♦ Reset Thresholds from +1.575V to +4.625V in Approximately 100mV Increments ♦ Six Minimum Reset Timeout Period Options from 10ms to 1200ms ♦ Manual Reset Option ♦ Watchdog Timer Option ♦ Pin-Selectable 10ms/150ms (min) Reset Timeout Period (MAX6861/MAX6862/MAX6863) ♦ Immune to Short VCC Transients ♦ Guaranteed Reset Valid to VCC = +1.1V ♦ Three Reset Output Options: Push-Pull RESET Push-Pull RESET Open-Drain RESET ♦ No External Components ♦ Small 5-Pin SOT23 Package ♦ Pin Compatible to the TPS3836/TPS3837/TPS3838 (MAX6861/MAX6862/MAX6863) Nanopower µP Supervisory Circuits with Manual Reset and Watchdog Timer ________________________________________________________________ Maxim Integrated Products 1 Ordering Information PART† TEMP RANGE PIN-PACKAGE MAX6854UK_ _D_-T -40°C to +85°C 5 SOT23-5 MAX6855UK_ _D_-T -40°C to +85°C 5 SOT23-5 19-3139; Rev 4; 12/05 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. Ordering Information continued at end of data sheet. †Insert reset threshold suffix (see Table 2, Threshold Suffix Guide) after UK. Insert the number corresponding to the desired reset timeout period (see Table 4, Reset Timeout Period) after D. Note: Sample stock is generally held on standard versions only (see Table 5, Standard Versions Table). Standard versions have an order increment of 2500 pieces. Nonstandard versions have an order increment of 10,000 pieces. Contact factory for availability of nonstandard versions. Devices are available in both leaded and lead-free packaging. Specify lead-free by replacing “-T” with “+T” when ordering. Pin Configurations and Selector Guide appear at end of data sheet. Typical Operating Circuit MAX6864 MAX6867 µP VCC VCC GND GND MANUAL RESET RESET I/O VCC 0.1 µF RESET MR WDI |
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