RS706-2.93YK

RS706 Supply Voltage Supervisor with Watchdog and Manual Reset 1 FEATURES 3 DESCRIPTIONS • Operating Voltage Range:1.0V to 5.5V • Low Power Consumption:40µA (Max) • Precision Supply-Voltage Monitor: 2.63V, 2.93V, 3.08V, 4.00V • • Debounced TTL/CMOS Compatible Manual-Reset Input Guaranteed ̅̅̅̅̅̅̅̅̅ 𝐑𝐄𝐒𝐄𝐓 Valid at VCC=1.0V • 160ms Reset Pulse Width • Independent Watchdog Timer (1.6sec TYP) Timeout • Voltage Monitor for Power-Fail or LowBattery Warning • Operating Temperature Range: -40°C to +125°C • Available in Green Package: SOIC-8(SOP8) The RS706 microprocessor (µP) supervisory circuits reduce the complexity and number of components required to monitor power-supply and battery function in µP systems. This device significantly improves system reliability and accuracy compared to separate ICs or discrete components. 2 APPLICATIONS • Computers • SOC、DSP or Micro Controllers • Embedded Systems • Industrial Equipment • Intelligent Instruments • Critical µP Power Monitoring • Wireless Communications Systems The RS706 provide four functions: 1) A reset output during power-up, power-down, and brownout conditions. The reset output remains operational with VCC as low as 1.0V. 2) An independent watchdog output that goes low if the watchdog input has not been toggled within 1.6 seconds (TYP). 3) A 1.2V threshold detector for power-fail warning, lowbattery detection, or for monitoring a power supply. 4) An active-low manual-reset input. The RS706 is available in Green SOIC-8 (SOP8) package. It operates over an ambient temperature range of -40°C to +125°C. Device Information (1) PART NUMBER RS706 (1) PACKAGE BODY SIZE (NOM) SOIC-8(SOP8) 4.90mm x 3.90mm For all available packages, see the orderable addendum at the end of the data sheet. 4 TYPICAL APPLICATION Unregulator DC Voltage RS3005 Linear Regulator μP Vcc Vcc PFI RESET RS706 WDI WDO MR PFO Pushbutton REV A.3 1 / 17 RESET I/O LINE NMI INTERRUPT www.run-ic.com RS706 Table of Contents 1 FEATURES .......................................................................................................................................................1 2 APPLICATIONS ................................................................................................................................................1 3 DESCRIPTION ..................................................................................................................................................1 4 TYPICAL APPLICATION ..................................................................................................................................1 5 Revision History ..............................................................................................................................................3 6 PACKAGE/ORDERING INFORMATION (1) ......................................................................................................4 7 PIN CONFIGURATIONS ...................................................................................................................................5 8 Specifications ..................................................................................................................................................6 8.1 Absolute Maximum Ratings (1) ....................................................................................................................6 8.2 ESD Ratings................................................................................................................................................6 8.3 Thermal Information: ...................................................................................................................................6 8.4 ELECTRICAL CHARACTERISTICS ...........................................................................................................7 8.5 Typical Operating Characteristics ...............................................................................................................8 9 Function Block Diagram .............................................................................................................................. 11 10 Detailed Description ................................................................................................................................... 12 10.1 Reset Output .......................................................................................................................................... 12 10.2 Watchdog Timer ..................................................................................................................................... 12 10.3 Manual Reset ......................................................................................................................................... 12 10.4 Power-Fail Comparator .......................................................................................................................... 12 11 Applications Information ........................................................................................................................... 13 11.1 Ensuring a Valid RESET Output Down to VCC=0V ................................................................................ 13 11.2 Monitoring Voltages Other Than the Unregulated DC Input .................................................................. 13 11.3 Interfacing to µPs with Bidirectional Reset Pins .................................................................................... 13 12 PACKAGE OUTLINE DIMENSIONS ........................................................................................................... 15 13 TAPE AND REEL INFORMATION .............................................................................................................. 16 2 / 17 www.run-ic.com RS706 5 Revision History Note: Page numbers for previous revisions may different from page numbers in the current version. Version Change Date A.1 2020/12/13 A.2 2022/02/22 A.3 2022/06/27 Change Item Initial version completed 1.Added the maximum value of tMD on Page 6@RevA.1 2.Modify ELECTRICAL CHARACTERISTICS 1. Update Operating Temperature Range: -40°C to +125°C 2. Update Typical Operating Characteristics 3. Update Reset Pulse Width typical value 4. Update VCC to ̅̅̅̅̅̅̅̅̅ RESET delay typical value 3 / 17 www.run-ic.com RS706 6 PACKAGE/ORDERING INFORMATION (1) PRODUCT ORDERING NUMBER TEMPERATURE RANGE PACKAGE LEAD PACKAGE MARKING (2/3) PACKAGE OPTION RS706-2.63YK -40°C ~+125°C SOIC-8(SOP8) RS706B Tape and Reel,4000 RS706-2.93YK -40°C ~+125°C SOIC-8(SOP8) RS706C Tape and Reel,4000 RS706-3.08YK -40°C ~+125°C SOIC-8(SOP8) RS706D Tape and Reel,4000 RS706-4.00YK -40°C ~+125°C SOIC-8(SOP8) RS706E Tape and Reel,4000 RS706 NOTE: (1) This information is the most current data available for the designated devices. This data is subject to change without notice and revision of this document. For browser-based versions of this data sheet, refer to the right-hand navigation. (2) There may be additional marking, which relates to the lot trace code information(data code and vendor code)，the logo or the environmental category on the device. (3) B, C, D, E, represents different Reset Thresholds. 4 / 17 www.run-ic.com RS706 7 PIN CONFIGURATIONS (TOP VIEW) MR 1 VCC 2 8 WDO 7 RESET RS706 GND 3 6 WDI PFI 4 5 PFO SOIC-8(SOP8) PIN DESCRIPTION PIN NAME FUNCTION SOIC-8(SOP8) 1 ̅̅̅̅̅ MR 2 VCC 3 GND 4 PFI 5 ̅̅̅̅̅ PFO 6 WDI 7 ̅̅̅̅̅̅̅̅̅ RESET 8 ̅̅̅̅̅̅̅ WDO Manual-Reset Input triggers a reset pulse when pulled below 0.8V. This active-low input has an internal pull-up resistance. It can be driven from a TTL or CMOS logic line as well as shorted to ground with a switch. Power Supply Voltage that is monitored. Ground, reference for all signals. Power-Fail Volta Monitor Input. When PFI is less than 1.2V, ̅̅̅̅̅̅ PFO goes low. Connect PFI to GND or VCC if not used. Power-Fail Output goes low and sinks current when PFI is less than 1.2V; Otherwise ̅̅̅̅̅ PFO stays high. Watchdog Input. If WDI remains high or low 1.6sec, the internal watchdog timer runs out and WDO goes low. Floating WDI or connecting WDI to a high-impedance three-state buffer disables the watchdog feature. The internal watchdog timer clears whenever reset is asserted, WDI is three-stated, or WDI sees a rising or falling edge. Active-Low Reset Output pulses low for 160ms when triggered, and stays low whenever VCC is below the reset threshold. It remains low for 160ms after VCC rises above the reset threshold or̅̅̅̅̅ MR goes from low to high. A watchdog timeout ̅̅̅̅̅̅̅ is connected to MR ̅̅̅̅̅. will not trigger ̅̅̅̅̅̅̅̅̅ RESET unless WDO Watchdog Output pulls low when the internal watchdog timer finishes, its 1.6sec ̅̅̅̅̅̅̅ also goes count and does not go high again until the watchdog is cleared. WDO ̅̅̅̅̅̅̅ low during low-line conditions. Whenever VCC is below the reset threshold, WDO ̅̅̅̅̅̅̅ stays low; WDO does not have a minimum pulse width. As soon as VCC rises above ̅̅̅̅̅̅̅ goes high with no delay. the reset threshold, WDO 5 / 17 www.run-ic.com RS706 8 Specifications 8.1 Absolute Maximum Ratings (1) over operating free-air temperature range (unless otherwise noted) (1)(2) VCC Supply voltage range (2) VI (2) (3) (4) MAX UNIT -0.5 6.0 V -0.5 6.0 V -0.5 6.0 V -0.5 VCC+0.5 V Vo Input voltage range Voltage range applied to any output in the high-impedance or power-off state(2) Voltage range applied to any output in the high or low state (2)(3) IIK Input clamp current VI