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ASM1816R-20F Datasheet(PDF) 1 Page - Alliance Semiconductor Corporation |
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ASM1816R-20F Datasheet(HTML) 1 Page - Alliance Semiconductor Corporation |
1 / 9 page ASM1816 Alliance Semiconductor 2575 Augustine Drive . Santa Clara, CA 95054 . Tel: 408.855.4900 . Fax: 408.855.4999 . www.alsc.com Notice: The information in this document is subject to change without notice rev 1.4 Low Power 3.3V/3.0V µP Reset, Active LOW, Open-Drain Output February 2005 General Description The ASM1816 is a voltage supervisory device with low-power, 3.3V/3V µP Reset, active LOW, open-drain output. Maximum supply current over temperature is a low 15µA (at 3.6V). The ASM1816 generates an active LOW reset signal whenever the monitored supply is out of tolerance. A precision reference and comparator circuit monitor power supply (VCC) level. Tolerance level options are 5%, 10% and 20%. When an out-of- tolerance condition is detected, an internal power-fail signal is generated which forces an active LOW reset signal. After VCC returns to an in-tolerance condition, the reset signal remains active for 150ms to allow the power supply and system microprocessor to stabilize. The ASM1816 is designed with a open-drain output stage and operates over the extended industrial temperature range. Devices are available in TO-92 and compact surface mount SOT-23 packages. Other low power products in this family include the ASM1810/ 11/12/15/17, ASM1233D and ASM1233M. Key Features • Low Supply Current •20 µA maximum (5.5 V) •15µA maximum (3.6 V) • Automatically restarts a microprocessor after power failure • 150ms reset delay after VCC returns to an in-tolerance con- dition • Active LOW power-up reset • Precision temperature-compensated voltage reference and comparator • Eliminates external components • TO-92 and compact surface mount SOT-23 package • Operating temperature -40°C to +85°C Applications • Set-top boxes • Cellular phones •PDAs • Energy management systems • Embedded control systems • Printers • Single board computers Typical Application Block Diagram Microprocessor VCC RESET RESET GND ASM1816 VCC Supply Reference Delay 150ms Typical Tolerance Bias + - 2 ASM1816 VCC Supply Delay 150ms Typical Tolerance Bias - GND RESET Reference + 1 3 5.0KΩ |
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