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IMP706TCSA Datasheet(PDF) 1 Page - IMP, Inc |
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IMP706TCSA Datasheet(HTML) 1 Page - IMP, Inc |
1 / 8 page © 1999 IMP, Inc. 408-432-9100/www.impweb.com 1 Key Features Applications N Computers and controllers N CTI applications N Embedded controllers N Battery operated systems N Intelligent instruments N Wireless communication systems N PDAs and handheld equipment N Lower power, pin compatible replacements for Maxim MAX706P/R/S/T, MAX708R/S/T – 30% lower supply current:140µA vs. 200µA N Precision power supply monitor – 2.63V threshold (IMP706P/R, IMP708R) – 2.93V threshold (IMP706S, IMP708S) – 3.08V threshold (IMP706T, IMP708T) – New 4.00V threshold (IMP706J, IMP708J) N Debounced manual reset input N Auxiliary voltage monitor comparator – 1.25V threshold – Battery monitor/auxiliary supply monitor N Watchdog timer (IMP706P/R/S/T/J) – Watchdog can be disabled by floating WDI N 200ms reset time delay N Three reset signal options – Active HIGH: IMP706P – Active LOW: IMP706R/S/T/J – Active HIGH & LOW outputs: IMP708R/S/T/J N DIP, SO and MicroSO packages N Guaranteed RESET assertion to VCC = 1.1V Block Diagrams IMP706P/R/S/T/J, IMP708R/S/T/J IMP706P/R/S/T/J, IMP708R/S/T/J POWER MANAGEMENT 3/3.3/4.0V 3/3.3/4.0V µ µP Super P Supervisor Cir visor Circuits cuits – Lo – Low suppl w supply cur y cur rrent ent – W – Watc atchdog timer hdog timer – Br – Bro ownout det wnout detection ection The IMP706P/R/S/T/J and IMP708R/S/T/J CMOS supervisor circuits monitor power-supply and battery voltage level, and µP/µC operation. A reset is generated when the supply drops below 2.63V (IMP706P/R, IMP708R), 2.93V (IMP706S, IMP708S), 3.08V (IMP706T, IMP708T) or 4.00 (IMP706J, IMP708J). The family offers several functional options. Each device generates a reset signal during power-up, power-down and during brownout conditions. In addition, the IMP706P/R/S/T/J feature a 1.6 second watchdog timer. The watchdog timer output will trigger a reset if connected to MR. Unlike competitive devices, floating the WDI input pin disables the watchdog timer. The IMP708R/S/T/J have both active-HIGH and active-LOW reset out- puts but no watchdog function. The IMP706P has the same pin-out and functions as the IMP706R 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. RESET RESET V CC RESET Generator 2.63V (IMP708R) 2.93V (IMP708S) 3.08V (IMP708T) 4.00V (IMP708J) VCC + – + MR IMP708R/S/T/J PFO GND 1.25V – + PFI 706P_02.eps 20k Ω 1.25V – + MR WDI IMP706P/R/S/T/J WDO RESET (RESET) IMP706P PFO GND V CC 20k Ω RESET Generator 2.63V (IMP706P/R) 2.93V (IMP706S) 3.08V (IMP706T) 4.00V (IMP706J) VCC + – + PFI Timebase Watchdog Timer Transition Detector 706P_01.eps |
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