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MAX791CPE

製品説明
仕様・特性

19-0075; Rev. 7; 11/05 Microprocessor Supervisory Circuit Applications Computers Controllers Portable/BatteryPowered Equipment Critical µP Power Monitoring Intelligent Instruments Features ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ Precision 4.65V Voltage Monitoring 200ms Power-OK / Reset Time Delay Independent Watchdog Timer—Preset or Adjustable 1µA Standby Current Power Switching 250mA Output in VCC Mode 25mA Output in Battery-Backup Mode On-Board Gating of Chip-Enable Signals Memory Write-Cycle Completion 6ns CE Gate Propagation Delay MaxCap or SuperCap Compatible Voltage Monitor for Power-Fail or Low-Battery Warning Backup-Battery Monitor –—— ——– Guaranteed RESET Valid to VCC = 1V Ordering Information PART TEMP RANGE PIN-PACKAGE MAX791CPE 0°C to +70°C 16 Plastic DIP MAX791CSE MAX791C/D MAX791CUE MAX791EPE 0°C to +70°C 0°C to +70°C 0°C to +70°C -40°C to +85°C 16 Narrow SO Dice* 16 TSSOP 16 Plastic DIP MAX791ESE MAX791EJE MAX791EUE MAX791MJE -40°C to +85°C -40°C to +85°C -40°C to +85°C -55°C to +125°C 16 Narrow SO 16 CERDIP 16 TSSOP 16 CERDIP * Dice are specified at TA = +25°C. Devices in PDIP, SO and TSSOP packages are available in both leaded and lead-free packaging. Specify lead free by adding the + symbol at the end of the part number when ordering. Lead free not available for CERDIP package. Typical Operating Circuit Pin Configuration +5V CMOS RAM 0.1µF 0.1µF TOP VIEW VBATT 1 16 WDPO VOUT 2 15 RESET VCC 3 0.47F* OTHER SYSTEM RESET SOURCES VCC VBATT 14 WDO GND 4 MAX791 BATT ON 5 CE OUT 13 CE IN PFI MAX791 +12V SUPPLY 10 LOWLINE SWT 8 9 CE IN +12V 11 WDI PFI 7 SWT VOUT MR 12 CE OUT PFO 6 BATT ON FAILURE MR WDI PFO GND LOWLINE RESET WDO DIP/SO/TSSOP ADDRESS DECODE A0–A15 µP I/O NMI RESET INT *MaxCap MaxCap is a registered trademark of Cesiwid Inc. SuperCap is a registered trademark of Baknor Industries. ________________________________________________________________ Maxim Integrated Products 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 MAX791 General Description The MAX791 microprocessor (µP) supervisory circuit reduces the complexity and number of components needed to monitor power-supply and battery-control functions in µP systems. The 50µA supply current makes the MAX791 ideal for use in portable equipment, while the 6ns chip-enable propagation delay and 250mA output capability (25mA in battery-backup mode) make it suitable for larger, higher-performance equipment. The MAX791 comes in 16-pin DIP, TSSOP, and narrow SO packages and provides the following functions: –—— — —– • µP reset. RESET output is asserted during power-up, power-down, and brownout conditions, and is guaranteed to be in the correct state for VCC down to 1V, even with no battery in the circuit. • Manual-reset input. • A 1.25V threshold detector provides for power-fail warning and low-battery detection, or monitors a power supply other than +5V. • Two-stage power-fail warning. A separate low-line comparator compares V CC to a threshold 150mV above the reset threshold. • Backup-battery switchover for CMOS RAM, real-time clocks, µPs, or other low-power logic. • Software monitoring of backup-battery voltage. • A watchdog-fault output is asserted if the watchdog input has not been toggled within either a preset or an adjustable timeout period. • Write protection of CMOS RAM or EEPROM. • Pulsed watchdog output to give advance warning of –— – — impending WDO assertion caused by watchdog timeout.

ブランド

LINEAR

会社名

Linear Technology Corp.

本社国名

U.S.A

事業概要

通信、携帯電話、ネットワーキング機器、ノート PC、デスクトップPC、ビデオ/マルチメディア、産業計測、カーエレクトロニクス、工場自動化、プロセス制御、軍需および宇宙システムなどに利用されて います。

供給状況

 
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MAX791 MAX791CPE MAX791CPE+T MAX791CSE MAX791CSEESE
MAX791CSE-LF MAX791CSE-T MAX791ECSC MAX791ESE MAX791ESECSE
MAX791ESED MAX791ESE-SMD MAX791ESESMD-SO16 MAX791ESE-T MAX792
MAX792LCPE MAX792LCSE MAX792LCSE-LF MAX792LCSE-T MAX792LESE
MAX792LESE+T MAX792M MAX792MCPE MAX792MCSE MAX792MCSE-T
MAX792MEPE MAX792MESE MAX792MESE+T MAX792RCPE MAX792SCPE
MAX792SCSE MAX792SCSE-T MAX792SESE MAX792TESE MAX792TESE-T
MAX793 MAX7938CSE MAX793ESE MAX793ESE+T MAX793RCSE
MAX793RESE MAX793SCPE MAX793SCSE MAX793SCSE+C48 MAX793SCSET
MAX793SCSE+TC48 MAX793SCSETCSE MAX793SCSETG002 MAX793SCSETG068 MAX793SCSE-TG074
MAX793SESE MAX793SESEROHS MAX793SESE-T MAX793TCSE MAX793TESA
MAX793TESE MAX793TESE-T MAX794 MAX794CPE MAX794CSE
MAX794CSEMAX MAX794CSE-T MAX794ESE MAX795 MAX795LESA
MAX795RCPA MAX795RESA MAX795RESA+T MAX795SCSA MAX795SCSACSA
MAX795SCSA-T MAX795SCSA-TMAXIMS MAX795SESA MAX795TCSA MAX795TCSAESA
MAX795TCSA-T MAX795TESA MAX795TESA+T MAX796CPE MAX796ESE
MAX796ESE+CSE+ MAX796ESE+T MAX797 MAX797CPE MAX797CSE
MAX797CSEESE MAX797CSE+G068 MAX797CSE+MAXIMROH MAX797CSESTEPDOWNCONT MAX797CSE-T
MAX797CSE-TG068 MAX797CSETG074 MAX797ESE MAX797ESEGG8 MAX797ESEGH9
MAX797ESEGH9-T MAX797ESE+MAXIMROH MAX797ESE-SMD MAX797ESE-T MAX797ESETEEPING
MAX797ESE-TG068 MAX797ESE-W MAX797H MAX797HESE MAX797HESE+MAX
MAX797HESE-T MAX797MSE MAX798 MAX7984AJC20 MAX798ESE
MAX798ESECSE MAX798ESE+MAX MAX798ESE-T MAX798ESETG002 MAX799
MAX799CSE MAX799CSE-T

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