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ADM802L bảng dữ liệu(PDF) 1 Page - Analog Devices |
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ADM802L bảng dữ liệu(HTML) 1 Page - Analog Devices |
1 / 8 page REV. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. a ADM690A/ADM692A/ADM802L/M/ADM805L/M One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 617/329-4700 World Wide Web Site: http://www.analog.com Fax: 617/326-8703 © Analog Devices, Inc., 1996 Microprocessor Supervisory Circuits FUNCTIONAL BLOCK DIAGRAM BATTERY SWITCHOVER RESET GENERATOR WATCHDOG TRANSITION DETECTOR (1.6s) 4.65V* 1.25V *4.4V FOR ADM692A/ADM802M/ADM805M ADM690A ADM692A ADM802L ADM802M ADM805L ADM805M POWER FAIL OUTPUT (PFO) RESET VOUT VBATT VCC WATCHDOG INPUT (WDI) POWER FAIL INPUT (PFI) (RESET) ( ) = ADM805L/M ONLY FEATURES Precision Supply Voltage Monitor 4.65 V ADM690A/ADM802L/ADM805L 4.40 V ADM692A/ADM802M/ADM805M Reset Assertion Down to 1 V VCC Reset Timeout—200 ms Watchdog Timer—1.6 s 100 A Quiescent Supply Current Automatic Battery Backup Power Switching Voltage Monitor for Power Fail 2% Power Fail Accuracy on ADM802L/M Space-Saving MicroSOIC Package (ADM690A) APPLICATIONS Microprocessor Systems Computers Controllers Intelligent Instruments GENERAL DESCRIPTION The ADM690A/ADM692A/ADM802L/M/ADM805L/M family of supervisory circuits offers complete single chip solutions for power supply monitoring and battery control functions in microprocessor systems. These functions include µP reset, backup battery switchover, watchdog timer, and power failure warning. The ADM690A/ADM692A/ADM802L/M/ADM805L/M are available in 8-pin packages and provide: 1. Power-on reset output during power-up, power-down and brownout conditions. The RESET output remains opera- tional with VCC as low as 1 V. 2. Battery backup switching for CMOS RAM, CMOS microprocessor or other low power devices. 3. A reset pulse if the optional watchdog timer has not been toggled within 1.6 seconds. 4. A 1.25 V threshold detector for power fail warning, low battery detection, or to monitor a power supply other than +5 V. On the ADM690A/ADM802L/ADM805L the reset voltage threshold is 4.65 V. On the ADM692A/ADM802M/ ADM805M, the reset voltage threshold is 4.40 V. The ADM802L/ADM802M guarantee power fail accuracies to ±2%. The ADM805L/M provides an active high reset output, RESET instead of RESET. The family of products is fabricated using an advanced epitaxial CMOS process combining low power consumption and high reliability. RESET assertion is guaranteed with VCC as low as 1 V. They provide a pin-compatible upgrade for the MAX690A/ MAX692A/MAX802L/MAX802M/MAX805L All parts are available in 8-pin DIP and SOIC packages. The ADM690A is also available in a new space-saving microSOIC package. |
Số phần tương tự - ADM802L |
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Mô tả tương tự - ADM802L |
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