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ASM706PCPA Datasheet(PDF) 1 Page - Alliance Semiconductor Corporation |
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ASM706PCPA Datasheet(HTML) 1 Page - Alliance Semiconductor Corporation |
1 / 16 page 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 October 2003 rev 1.0 3/3.3/4.0 V µP Supervisor Circuits ASM706 P/ R/ S/ T/ J ASM708 R/ S/ T/ J General Description The ASM706P/R/S/T/J and ASM708R/S/T/J are cost effective CMOS supervisor circuits that monitor power-supply and battery voltage level, and µP/µC operation. The family offers several functional options. Each device generates a reset signal during power-up, power-down and during brownout conditions. A reset is generated when the supply drops below 2.63V (ASM706P/R, ASM708R), 2.93V (ASM706S, ASM708S), 3.08V (ASM706T, ASM708T) or 4.00 (ASM706J, ASM708J). In addition, the ASM706P/R/S/T/J feature a 1.6 second watchdog timer. The watchdog timer output will trigger a reset if connected to MR. Floating the WDI input pin disables the watchdog timer. The ASM708R/S/T/J have both active-HIGH and active-LOW reset outputs but no watchdog function. The ASM706P has the same pin-out and functions as the ASM706R but has an active- HIGH reset output. A versatile power-fail circuit, useful in checking battery levels and non-5V supplies, has a 1.25V threshold. All devices have a manual reset input. All devices are available in 8-pin DIP, SO and the compact MicroSO packages. The MicroSO package requires 50% less PC board area than the conventional SO package. Features • Precision power supply minotor •2.63V threshold (ASM706P/R, ASM708R) •2.93V threshold (ASM706S, ASM708S) •3.08V threshold (ASM706T, ASM708T) •New 4.00V threshold (ASM706J , ASM708J) • Debounced manual reset input • Auxiliary voltage monitor comparator •1.25V threshold •Battery monitor / auxiliary supply monitor • Watchdog timer (ASM706P/R/S/T/J) •Watchdog can be disabled by floating WDI • 200ms reset time delay • Three reset signal options •Active HIGH: ASM706P •Active LOW: ASM706R/S/T/J •Active HIGH and LOW outputs: ASM708R/S/T/J • DIP, SO and MicroSO packages • Guaranteed RESET assertion to VCC = 1.1V Applications • Computers and embedded controllers • CTI applications • Automotive systems • Portable/Battery-operated systems • Intelligent instruments • Wireless communication systems • PDAs and hand-held equipment • Safety systems Typical Operating Circuit +3.3V Regulator VCC PFI MR (RESET) WDI WDO PFO VCC (RESET) I/O LINE NMI INTERRUPT Unregulated DC R1 R2 µP ASM706 R/S/T ASM708 R/S/T (ASM706 P) RESET RESET |
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