MAX807L MAXIM [Maxim Integrated Products], MAX807L Datasheet
MAX807L
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MAX807L Summary of contents
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... 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. ±1.5% Reset Accuracy ♦ Precision 4.675V (MAX807L), 4.425V (MAX807M), or 4.575V (MAX807N) Voltage Monitoring ♦ 200ms Power-OK/Reset Time Delay ♦ RESET and RESET Outputs ♦ ...
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... Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS (V = 4.60V to 5.5V for the MAX807L 2.8V 0V, T ...
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... Full-Featured µP Supervisory Circuit with ELECTRICAL CHARACTERISTICS (continued 4.60V to 5.5V for the MAX807L 2.8V 0V BATT PFI A MIN PARAMETER SYMBOL BATT ON Output Short-Circuit Current RESET, LOW LINE, AND WATCHDOG TIMER Reset Threshold V Reset Threshold Hysteresis LOW LINE to RESET V Threshold Voltage ...
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... Full-Featured µP Supervisory Circuit with ±1.5% Reset Accuracy ELECTRICAL CHARACTERISTICS (continued 4.60V to 5.5V for the MAX807L 2.8V 0V BATT PFI A MIN MAX PARAMETER SYMBOL PFI Input Threshold V PFT PFI Hysteresis PFI Leakage Current PFI to PFO Delay (Note 5) CHIP-ENABLE GATING CE IN Leakage Current ...
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... BATT 2.8V BATT 4.5V BATT 5 -60 -40 - 100 120 TEMPERATURE (°C) RESET THRESHOLD vs. TEMPERATURE 4.70 4.65 MAX807L 4.60 MAX807N 4.55 4.50 4.45 MAX807M 4.40 -60 -40 - 100 120 TEMPERATURE (°C) _______________________________________________________________________________________ ±1.5% Reset Accuracy = +25°C, unless otherwise noted.) A BATTERY SUPPLY CURRENT vs. TEMPERATURE (BATTERY-BACKUP MODE) 3 ...
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Full-Featured µP Supervisory Circuit with ±1.5% Reset Accuracy ( 2.8V, PFI = 0, no load BATT LOW LINE THRESHOLD vs. TEMPERATURE (V RISING) CC 4.80 L VERSION 4.75 4.70 N VERSION 4.65 4.60 4.55 ...
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Full-Featured µP Supervisory Circuit with PIN NAME 1 PFI Power-Fail Input. When PFI is less than V Power-Fail Output. This CMOS-logic output goes low when PFI is less than V 2 PFO ≥ 4V. PFO swings between ...
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Full-Featured µP Supervisory Circuit with ±1.5% Reset Accuracy Detailed Description The MAX807 µP supervisory circuit provides power- supply monitoring, backup-battery switchover, and pro- gram execution watchdog functions in µP systems (Figure 1). Use of BiCMOS technology results in an improved ...
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Full-Featured µP Supervisory Circuit with V V RST LOW LINE RESET (MAX801 RESET (MAX808 OUT V BATT SHOWN FOR 5V 2.8V, CE ...
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Full-Featured µP Supervisory Circuit with ±1.5% Reset Accuracy MR RESET OUT Figure 4. Manual-Reset Timing Diagram WDO remains high if there is a transition or pulse at WDI during the watchdog-timeout period. WDO goes low if ...
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Full-Featured µP Supervisory Circuit with V CC RESET THRESHOLD OUT 28µs 26µs RESET RESET Figure 7. Reset and Chip-Enable Timing (see the Chip-Enable Propagation Delay vs. CE OUT Load Capacitance graph in the Typical Operating Characteristics). The ...
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Full-Featured µP Supervisory Circuit with ±1.5% Reset Accuracy V R1 MAX807 PFI R2 GND PFO – TRIP PFT PFH ...
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Full-Featured µP Supervisory Circuit with Table 1. Input and Output Status in Battery-Backup Mode PIN NAME 1 PFI The power-fail comparator remains active in battery-backup mode for V 2 PFO The power-fail comparator remains active in battery-backup mode for V ...
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Full-Featured µP Supervisory Circuit with ±1.5% Reset Accuracy BATT OK Output The BATT OK comparator monitors the backup battery voltage, comparing it with a 2.265V reference (V 4V). BATT OK remains high as long as the backup bat- tery voltage ...
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Full-Featured µP Supervisory Circuit with Backup-Battery Replacement The backup battery may be disconnected while V above the reset threshold, provided BATT is bypassed with a 0.1µF capacitor to ground. No precautions are necessary to avoid spurious reset pulses. Negative-Going V ...
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Full-Featured µP Supervisory Circuit with ±1.5% Reset Accuracy Typical Operating Circuit +5V 0.1µF V BATT ON OUT CC BATT 0.47F* CE OUT OTHER MR SYSTEM RESET ADDRESS CE IN SOURCES DECODE PUSH- MAX807 BUTTON WDI SWITCH LOW LINE RESET RESET ...