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MAX706RCSA Datasheet(PDF) 1 Page - Maxim Integrated Products |
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MAX706RCSA Datasheet(HTML) 1 Page - Maxim Integrated Products |
1 / 15 page General Description The MAX706P/R/S/T, MAX706AP/AR/AS/AT, and MAX708R/S/T microprocessor (µP) supervisory circuits reduce the complexity and number of components required to monitor +3V power-supply levels in +3V to +5V µP systems. These devices significantly improve system reliability and accuracy compared to separate ICs or discrete components. The MAX706P/R/S/T and MAX706AP/AR/AS/AT supervi- sory circuits provide the following four functions: 1) A reset output during power-up, power-down, and brownout conditions. 2) An independent watchdog output that goes low if the watchdog input has not been toggled within 1.6s. 3) A 1.25V threshold detector for power-fail warning, low-battery detection, or for monitoring a power supply other than the main supply. 4) An active-low, manual-reset input. The only difference between the MAX706R/AR, MAX706S/AS, and MAX706T/AT is the reset-threshold voltage levels, which are 2.63V, 2.93V, and 3.08V, respectively. All have active-low reset output signals. The MAX706P/AP are identical to the MAX706R/AR, except the reset output signal is active-high. The watch- dog timer function for the MAX706AP/AR/AS/AT dis- ables when the WDI input is left open or connected to a high-impedance state of a low-leakage tri-state output. The MAX708R/S/T provide the same functions as the MAX706R/S/T and MAX706AR/AS/AT except they do not have a watchdog timer. Instead, they provide both RESET and RESET outputs. As with the MAX706, devices with R, S, and T suffixes have reset thresholds of 2.63V, 2.93V, and 3.08V, respectively. These devices are available in 8-pin SO, DIP, and µMAX® packages and are fully specified over the oper- ating temperature range. Applications Battery-Powered Equipment Portable Instruments Computers Controllers Intelligent Instruments Critical µP Power Monitoring Features ♦ µMAX Package, Small 8-Pin SO ♦ Precision Supply-Voltage Monitors 2.63V (MAX706P/R, MAX706AP/AR, and MAX708R) 2.93V (MAX706S, MAX706AS, and MAX708S) 3.08V (MAX706T, MAX706AT, and MAX708T) ♦ 200ms Reset Time Delay ♦ Debounced TTL/CMOS-Compatible Manual Reset Input ♦ 100µA Quiescent Current ♦ WDI Disable Feature (MAX706AP/AR/AS/AT) ♦ Watchdog Timer: 1.6s Timeout ♦ Reset Output Signal: Active-High Only (MAX706P, MAX706AP) Active-Low Only (MAX706R/S/T, MAX706AR/AS/AT) Active-High and Active-Low (MAX708R/S/T) ♦ Voltage Monitor for Power-Fail or Low-Battery Warning ♦ 8-Pin Surface-Mount Package ♦ Guaranteed RESET Assertion to VCC = 1V +3V Voltage Monitoring, Low-Cost µP Supervisory Circuits ________________________________________________________________ Maxim Integrated Products 1 Ordering Information 19-0099; Rev 5; 4/06 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. Pin Configurations appear at end of data sheet. µMAX is a registered trademark of Maxim Integrated Products, Inc. PART† TEMP RANGE PIN- PACKAGE PKG CODE MAX706PCPA 0°C to +70°C 8 PDIP P8-1 MAX706PCSA 0°C to +70°C 8 SO S8-2 MAX706PCUA 0°C to +70°C 8 µMAX U8-1 MAX706PEPA -40°C to +85°C 8 PDIP P8-1 †SO, µMAX, and PDIP packages are available in lead-free. VCC PFI GND MR PFO WDO RESET UNREGULATED DC PUSHBUTTON SWITCH WDI I/O LINE INTERRUPT µP MAX639 DC-DC CONVERTER +3V/+3.3V MAX706R/S/T MAX706AR/AS/AT VCC RESET NMI Typical Operating Circuits Typical Operating Circuits continued at end of data sheet. |
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