ASM690A/692A ASM802L/802M ASM805L April 2008 rev 1.7 µP Power Supply Supervisor With Battery Backup Switch General Description • Short circuit protection and thermal limiting The ASM690A / ASM692A / ASM802L / ASM802M / • Small 8-pin SO and 8-pin PDIP packages ASM805L offers complete single chip solutions for power • No external components supply monitoring and control battery functions in • Specified over full temperature range microprocessor systems. Each device implements four functions: Reset control, watchdog monitoring, battery- Applications backup switching and powerfailure monitoring. In addition • Embedded control systems to microprocessor reset under power-up and power-down • Portable/Battery operated systems conditions, • Intelligent instruments these devices provide battery-backup switching to maintain control in power loss and brown-out • Wireless instruments situations. Additional monitoring capabilities can provide • Wireless communication systems an early warning of unregulated power supply loss before • PDAs and hand-held equipments the voltage regulator drops out. The important features of • µP / µC power supply monitoring these four functions are: • Safety system • 1.6 second watchdog timer to keep microprocessor responsive Typical Operating Circuit • 4.40V or 4.65V VCC threshold for microprocessor reset at power-up and power-down • SPDT (Single-pole, Double-throw) PMOS switch connects backup power to RAM if VCC fails • 1.25V threshold detector for power loss or general purpose voltage monitoring These features are pin-compatible with the industry standard power-supply supervisors. Short-circuit and thermal protection have also been added. The ASM690A / ASM802L / ASM805L generate a reset pulse when the supply voltage drops below 4.65V and the ASM692A / ASM802M generate a reset below 4.40V. The ASM802L / Block Diagram ASM802M have power-fail accuracy to ± 2%. The ASM805L is the same as the ASM690A except that RESET is provided instead of RESET. Features • Two precision supply-voltage monitor options 4.65V (ASM690A / ASM802L / ASM805L) 4.40V (ASM692A / ASM802M ) • Battery-backup power switch on-chip • Watchdog timer: 1.6 second timeout • Power failure / low battery detection PulseCore Semiconductor Corporation 1715 S. Bascom Ave Suite 200 Campbell, CA 95008 • Tel: 408-879-9077 • Fax: 408-879-9018 www.pulsecoresemi.com Notice: The information in this document is subject to change without notice. ASM690A/692A ASM802L/802M ASM805L April 2008 rev 1.7 Pin Configuration Pin Description Pin Number ASM690A/ ASM692A Name Function ASM805L ASM802L/ ASM802M Voltage supply for RAM. When VCC is above the reset threshold, VOUT connects to VCC through a P-Channel MOS device. If VCC falls below the 1 1 VOUT reset threshold, this output will be connected to the backup supply at VBATT (or VCC, whichever is higher) through the MOS switch to provide continuous power to the CMOS RAM. 2 2 VCC +5V power supply input. 3 3 GND Ground Power failure monitor input. PFI is connected to the internal power fail 4 4 PFI comparator which is referenced to 1.25V. The power fail output (PFO) is active LOW but remains HIGH if PFI is above 1.25V. If this feature is unused, the PFI pin should be connected to GND or VOUT. 5 5 Power-fail output. PFO is active LOW whenever the PFI pin is less than PFO 1.25V. Watchdog input. The WDI input monitors microprocessor activity. An internal timer is reset with each transition of the WDI input. If the WDI is held HIGH 6 6 WDI or LOW for longer than the watchdog timeout period, typically 1.6 seconds, RESET (or RESET) is asserted for the reset pulse width time, tRS, of 140ms, minimum. Active-LOW reset output. When triggered by VCC falling below the reset threshold or by watchdog timer timeout, RESET pulses low for the reset 7 - pulse width tRS, typically 200ms. It will remain low if VCC is below the reset RESET threshold (4.65V in ASM690A / ASM802L and 4.4V in the ASM692A / ASM802L) and remains low for 200ms after VCC rises above the reset threshold. - 7 RESET 8 8 VBATT Active-HIGH reset output. The inverse of RESET. Auxiliary power or backup-battery input. VBATT should be connected to GND if the function is not used. The input has about 40mV of hysteresis to prevent rapid toggling between VCC and VBATT. µP Power Supply Supervisor With Battery Backup Switch Notice: The information in this document is subject to change without notice. 2 of 15 ASM690A/692A ASM802L/802M ASM805L April 2008 rev 1.7 Detailed Description It is important to initialize a microprocessor to a known Application Information state in response to specific events that could create Microprocessor Interface code execution errors and “lock-up”. The reset output of The ASM690 has logic-LOW RESET output while the these supervisory circuits send a reset pulse to the ASM805 has an inverted logic-HIGH RESET output. microprocessor Microprocessors with bidirectional reset pins can pose a in response to power-up, power- down/power-loss or a watchdog time-out. problem when the supervisory circuit and the microprocessor output pins attempt to go to opposite RESET/RESET Timing Power-up reset occurs when a rising VCC reaches the reset threshold, VRT, forcing a reset condition in which logic states. The problem can be resolved by placing a 4.7kΩ resistor between the RESET output and the the reset output is asserted in the appropriate logic state microprocessor reset pin. This is shown in Figure 2. for the duration of tRS. The reset pulse width, tRS, is Since the series resistor limits drive capabilities, the reset typically around 200ms and is LOW for the ASM690A, signal to other devices should be buffered. ASM692A, ASM802 and HIGH for the ASM805L. Figure 1 shows the reset pin timing. Power-loss or “brown-out” reset occurs when VCC dips below the reset threshold resulting in a reset assertion for the duration of tRS. The reset signal remains asserted as long as VCC is between VRT and 1.1V, the lowest VCC for which thesedevices can provide a guaranteed logic-low output. To ensure logic inputs connected to the ASM690A / ASM692A/ASM802 RESET pin are in a known state when VCC is under 1.1V, a 100kΩ pull-down resistor at RESET is needed: the logic-high ASM805L will need a pull-up resistor to VCC. Watchdog Timer A Watchdog time-out reset occurs when a logic “1” or logic “0” is continuously applied to the WDI pin for more than 1.6 seconds. After the duration of the reset interval, the watchdog timer starts a new 1.6 second timing interval; the microprocessor must service the watchdog input by changing states or by floating the WDI pin before this interval is finished. If the WDI pin is held either HIGH or LOW, a reset pulse will be triggered every 1.8 seconds (the 1.6 second timing interval plus the reset pulse width tRS). µP Power Supply Supervisor With Battery Backup Switch Notice: The information in this document is subject to change without notice. 3 of 15 ASM690A/692A ASM802L/802M ASM805L April 2008 rev 1.7 Watchdog Input As discussed in the Reset section, the Watchdog input is used to monitor microprocessor activity. It can be used to insure that the microprocessor is in a continually responsive state by requiring that the WDI pin be toggled every second. If the WDI pin is not toggled within the 1.6 second window (minimum tWD + tRS), a reset pulse will be asserted to return the microprocessor to the initial start-up state. Pulses as short as 50ns can be applied to the WDI pin. If this feature is not used, the WDI pin should be open circuited or the logic placed into a highimpedance state to allow the pin to float. Backup-Battery Switchover A power loss can be made less severe if the system RAM Table 1. Pin Connections in Battery Backup Mode contents are preserved. This is achieved in the ASM690/692/ 802/805 by switching from the failed VCC to an alternate power source connected at VBATT when VCC is less than the reset threshold voltage (VCC < VRT), and VCC is less than VBATT. The VOUT pin is normally connected to VCC through a 2Ω PMOS switch but a brown-out or loss of VCC will cause a switchover to VBATT by means of a 20Ω PMOS switch. Although both conditions (VCC < VRT and VCC <VBATT) must occur for the switchover to VBATT to occur, VOUT will be switched back to VCC when VCC exceeds VRT irrespective of the Pin Connection VOUT Connected to VBATT through internal PMOS switch VBATT Connected to VOUT PFI PFO RESET WDI Disabled Logic-LOW Logic-LOW (except on ASM805 where it is HIGH) Watchdog timer disabled voltage at VBATT. It should be noted that an internal device diode (D1 in Figure 3) will be forward biased if During the backup power mode, the internal circuitry of VBATT exceeds VCC by more than a diode drop when VCC the supervisory circuit draws power from the battery is switched to VOUT. Because of this it is recommended supply. While VCC is still alive, the comparator circuits that VBATT be no greater than VRT +0.6V. remain alive and the current drawn by the device is typically 35µA. When VCC drops more than 1.1V below VBATT, the internal switchover comparator, the PFI Condition SW1/SW2 SW3/SW4 VCC > Reset Threshold Open Closed the quiescent current drawn by the IC to less than 1µA. VCC < Reset Threshold VCC > VBATT Open Closed Backup Power Sources - Batteries VCC < Reset Threshold VCC < VBATT Closed Open comparator and WDI comparator will shut off, reducing Battery voltage selection is important to insure that the ASM690A/802A/805L Reset Threshold = 4.65V ASM692A /ASM802M Reset Threshold = 4.4V battery does not discharge through the parasitic device diode D1 (see Figure 3) when VCC is less than VBATT and VCC >VRT. µP Power Supply Supervisor With Battery Backup Switch Notice: The information in this document is subject to change without notice. 4 of 15 ASM690A/692A ASM802L/802M ASM805L April 2008 rev 1.7 the ASM692A/802M or within ±10% of 5V for the Table 2: Maximum Battery Voltages ASM690A/802L/805L to insure that the storage capacitor does not achieve an over voltage state. Part Number MAXIMUM Battery Voltage (V) ASM690A 4.80 ASM802L 4.80 ASM805L 4.80 ASM692A 4.55 ASM802M 4.55 Note: SuperCapTM is a trademark of Baknor Industries Although most batteries that meet the requirements of Table2 are acceptable, lithium batteries are very effective backup source due to their high-energy density and very low selfdischarge rates. Battery replacement while Powered Batteries can be replaced even when the device is in a powered state as long as VCC remains above the reset threshold voltage VRT. In the ASM devices, a floating VBATT pin will not cause a powersupply switchover as can occur in some other supervisory circuits. If VBATT is not used, the pin should be grounded. Backup Power Sources - SuperCap™ Capacitor storage, with very high values of capacitance, can be used as a back-up power source instead of batteries. SuperCap™ are capacitors with capacities in the fractional farad range. A 0.1 farad SuperCap™ would provide a useful backup power source. Like the battery supply, it is important that the capacitor voltage remain below the maximum voltages shown in Table 2. Although the circuit of Figure 4 shows the most simple way to connect the SuperCap™, this circuit cannot insure that an over voltage condition will not occur since the capacitor Operation without a Backup Power Source will ultimately charge up to VCC. To insure that an over When operating without a back-up power source, the voltage condition does not occur, the circuit of Figure 5 is VBATT pin should be connected to GND and VOUT should preferred. In this circuit configuration, the diode-resistor be connected to VCC, since power source switchover will pair clamps the capacitor voltage at one diode drop below not occur. Connecting VOUT to VCC eliminates the voltage VCC. VCC itself should be regulated within ±5% of 5V for drop due to the ON-resistance of the PMOS switch. µP Power Supply Supervisor With Battery Backup Switch Notice: The information in this document is subject to change without notice. 5 of 15 ASM690A/692A ASM802L/802M ASM805L April 2008 rev 1.7 Power-Fail Comparator reasonable and should be larger than 10kΩ to avoid The Power Fail feature is an independent voltage excessive loading on the PFO pin. The calculations for monitoring function that can be used for any number of the correct values of resistors to set the hysteresis monitoring activities. The PFI function can provide an thresholds are given in Figure 7. A capacitor can be early sensing of power supply failure by sensing the added to offer additional noise rejection by low-pass voltage of the unregulated DC ahead of the regulated filtering. supply sensing seen by the backup-battery switchover circuitry. The PFI pin is compared to a 1.25V internal reference. If the voltage at the PFI pin is less than this reference voltage, the PFO pin goes low. By sensing the voltage of the raw DC power supply, the microprocessor system can prepare for imminent power-loss, especially if the battery backup supply is not enabled. The input voltage at the PFI pin results from a simple resistor voltage divider as shown in Figure 6. Power Fail Hysteresis A noise margin can be added to the simple monitoring circuit of Figure 6 by adding positive feedback from the PFO pin. The circuit of Figure 7 adds this positive “latching” effect by means of an additional resistor R3 connected between PFO and PFI which helps in pulling PFI in the direction of PFO and eliminating an indecision at the trip point. Resistor R3 is normally about 10 times higher in resistance than R2 to keep the hysteresis band Monitoring Capabilities Of The Power-fail Input: Although designed for power supply failure monitoring, the PFI pin can be used for monitoring any voltage condition that can be scaled by means of a resistive divider. An example is the negative power supply monitor configured in Figure 8. In this case a good negative supply will hold the PFI pin below 1.25V and the PFO pin µP Power Supply Supervisor With Battery Backup Switch Notice: The information in this document is subject to change without notice. 6 of 15 ASM690A/692A ASM802L/802M ASM805L April 2008 rev 1.7 will be at logic “0”. As the negative voltage declines, the voltage at the PFI pin will rise until it exceeds 1.25V and the PFO pin will go to logic “1”. µP Power Supply Supervisor With Battery Backup Switch Notice: The information in this document is subject to change without notice. 7 of 15 ASM690A/692A ASM802L/802M ASM805L April 2008 rev 1.7 Absolute Maximum Ratings Parameter Min Max Unit VCC -0.3 6.0 V VBATT -0.3 6.0 V All other inputs1 -0.3 VCC + 0.3 V Input Current at VCC 200 mA Input Current at VBATT 50 mA Input Current at GND 20 mA Pin Terminal Voltage with Respect to Ground Output Current VOUT Short circuit protected All other inputs 20 mA Rate of Rise: VBATT and VCC 100 V/µs Plastic DIP (derate 9mW/°C above 70°C) 800 mW SO (derate 5.9mW/°C above 70°C) 500 mW Continuous Power Dissipation Operating Temperature Range (C Devices) 0 70 °C Operating Temperature Range (E Devices) -40 85 °C Storage Temperature Range -65 160 °C 300 °C 1 100 KV V Lead Temperature (Soldering, 10 sec) ESD rating HBM MM 1. The input voltage limits on PFI and WDI may be exceeded if the current is limited to less than 10mA Note: These are stress ratings only and functional operation is not implied. Exposure to absolute maximum ratings for prolonged time periods may affect device reliability. µP Power Supply Supervisor With Battery Backup Switch Notice: The information in this document is subject to change without notice. 8 of 15 ASM690A/692A ASM802L/802M ASM805L April 2008 rev 1.7 Electrical Characteristics Unless other wise noted, VCC = 4.75V to 5.5V for the ASM690A / ASM802L / ASM805L and VCC = 4.5V to 5.5V for the ASM692A / ASM802M;VBATT = 2.8V; and TA = TMIN to TMAX. Parameter VCC, VBATT Voltage Range (Note 1) Supply Current Excluding IOUT SYMBOL Conditions 35 IS TA = 25°C VCC = 0V, VBATT = 2.8V VBATT Standby Current (Note 2) 5.5V>VCC>VBATT + 0.2V VOUT Output VOUT in Battery Backup Mode Battery Switch Threshold, VCC to VBATT Battery Switch over Hysteresis VRT TA = 25°C TA =TMIN to TMAX -0.1 -1.0 100 µA IOUT = 50mA IOUT=250µA, VCC < VBATT - 0.2V VBATT- 0.1 Power Up Power Down ASM690A/802L/805L ASM692A, ASM802M ASM802L, TA = 25°C, VCC falling ASM802M, TA=25°C, VCC falling 4.50 4.25 4.55 4.30 tRS 140 ISOURCE = 800µA ISINK = 3.2mA ASM69_AC,ASM802_C,VCC=1.0V,ISINK=50µA ASM69_AE,ASM802_E,VCC=1.2V,ISINK=100µA ASM805LC, ISOURCE=4µA, VCC = 1.1V ASM805LE, ISOURCE=4µA, VCC = 1.2V ASM805L, ISOURCE=800µA tWD WDI Pulse Width tWP V V 20 -20 mV 40 mV 4.65 4.40 200 VCC - 1.5 4.75 4.50 4.70 4.45 mV 280 ms 0.4 0.3 0.3 V 0.4 1.60 2.25 sec 50 -50 150 µA µA 0.8 V ns 50 -150 VCC = 5V, Logic LOW VCC = 5V, Logic HIGH V 0.8 0.9 VCC - 1.5 1.00 VIL = 0.4V, VIH = 0.8VCC WDI = VCC WDI = 0V µA VCC0.010 VCC0.10 VBATT 0.001 40 Watchdog Timeout WDI Input Threshold (Note 3) V 0.02 0.02 ASM805L, ISINK=3.2mA WDI Input Current 5.5 µA Reset Threshold Hysteresis Reset Output Voltage Unit 5.0 VCC-0.025 VCC-0.25 VCC < VRT Max 1.5 TA =TMIN to TMAX IOUT = 5mA Reset Pulse Width TYP 1.1 ISUPPLY in Battery Backup Mode (Excluding IOUT) Reset Threshold Min 3.5 µP Power Supply Supervisor With Battery Backup Switch Notice: The information in this document is subject to change without notice. 9 of 15 ASM690A/692A ASM802L/802M ASM805L April 2008 rev 1.7 Parameter SYMBOL PFI Input Threshold Conditions ASM69_A, ASM805L, VCC = 5V ASM802_C/E, VCC = 5V PFI Input Current PFO Output Voltage ISOURCE = 800µA ISINK = 3.2mA Min TYP Max Unit 1.20 1.225 1.25 1.250 1.30 1.275 V -25 0.01 25 nA VCC - 1.5 0.4 V Notes: 1. If VCC or VBATT is 0V, the other must be greater than 2.0V. 2. Battery charging-current is “-”. Battery discharge current is “+”. 3. WDI is guaranteed to be in an intermediate level state if WDI is floating and VCC is within the operating voltage range. WDI input impedance is 50 kΩ. WDI is biased to 0.3VCC. µP Power Supply Supervisor With Battery Backup Switch Notice: The information in this document is subject to change without notice. 10 of 15 ASM690A/692A ASM802L/802M ASM805L April 2008 rev 1.7 Package Dimensions 8-lead PDIP Package µP Power Supply Supervisor With Battery Backup Switch Notice: The information in this document is subject to change without notice. 11 of 15 ASM690A/692A ASM802L/802M ASM805L April 2008 rev 1.7 8-lead (150-mil) SOIC Package µP Power Supply Supervisor With Battery Backup Switch Notice: The information in this document is subject to change without notice. 12 of 15 ASM690A/692A ASM802L/802M ASM805L April 2008 rev 1.7 Ordering Information - Tin - Lead Devices Reset Threshold (V) Temperature (°C) Pins-Package Package Marking ASM690ACPA 4.5 to 4.75 0 to +70 8-Plastic DIP ASM690ACPA ASM690ACSA 4.5 to 4.75 0 to +70 8-SO ASM690ACSA Part Number ASM690A ASM690AEPA 4.5 to 4.75 -40 to +85 8-Plastic DIP ASM690AEPA ASM690AESA 4.5 to 4.75 -40 to +85 8-SO ASM690AESA ASM692ACPA 4.25 to 4.50 0 to +70 8-Plastic DIP ASM692ACPA ASM692ACSA 4.25 to 4.50 0 to +70 8-SO ASM692ACSA ASM692AEPA 4.25 to 4.50 -40 to +85 8-Plastic DIP ASM692AEPA ASM692AESA 4.25 to 4.50 -40 to +85 8-SO ASM692AESA ASM802LCPA 4.5 to 4.75 0 to +70 8-Plastic DIP ASM802LCPA ASM802LCSA 4.5 to 4.75 0 to +70 8-SO ASM802LCSA ASM692A ASM802L ASM802LEPA 4.5 to 4.75 -40 to +85 8-Plastic DIP ASM802LEPA ASM802LESA 4.5 to 4.75 -40 to +85 8-SO ASM802LESA ASM802MCPA 4.25 to 4.50 0 to +70 8-Plastic DIP ASM802MCPA ASM802MCSA 4.25 to 4.50 0 to +70 8-SO ASM802MCSA ASM802MEPA 4.25 to 4.50 -40 to +85 8-Plastic DIP ASM802MEPA ASM802MESA 4.25 to 4.50 -40 to +85 8-SO ASM802MESA ASM805LCPA 4.5 to 4.75 0 to +70 8-Plastic DIP ASM805LCPA ASM805LCSA 4.5 to 4.75 0 to +70 8-SO ASM805LCSA ASM802M ASM805L ASM805LEPA 4.5 to 4.75 -40 to +85 8-Plastic DIP ASM805LEPA ASM805LESA 4.5 to 4.75 -40 to +85 8-SO ASM805LESA µP Power Supply Supervisor With Battery Backup Switch Notice: The information in this document is subject to change without notice. 13 of 15 ASM690A/692A ASM802L/802M ASM805L April 2008 rev 1.7 Ordering Information - Lead Free Devices Reset Threshold(V) Temperature(°C) Pins-Package Package Marking ASM690ACPAF 4.5 to 4.75 0 to +70 8-Plastic DIP ASM690ACPAF ASM690ACSAF 4.5 to 4.75 0 to +70 8-SO ASM690ACSAF ASM690AEPAF 4.5 to 4.75 -40 to +85 8-Plastic DIP ASM690AEPAF ASM690AESAF 4.5 to 4.75 -40 to +85 8-SO ASM690AESAF ASM692ACPAF 4.25 to 4.50 0 to +70 8-Plastic DIP ASM692ACPAF ASM692ACSAF 4.25 to 4.50 0 to +70 8-SO ASM692ACSAF ASM692AEPAF 4.25 to 4.50 -40 to +85 8-Plastic DIP ASM692AEPAF ASM692AESAF 4.25 to 4.50 -40 to +85 8-SO ASM692AESAF ASM802LCPAF 4.5 to 4.75 0 to +70 8-Plastic DIP ASM802LCPAF ASM802LCSAF 4.5 to 4.75 0 to +70 8-SO ASM802LCSAF Part Number ASM690A ASM692A ASM802L ASM802LEPAF 4.5 to 4.75 -40 to +85 8-Plastic DIP ASM802LEPAF ASM802LESAF 4.5 to 4.75 -40 to +85 8-SO ASM802LESAF ASM802MCPAF 4.25 to 4.50 0 to +70 8-Plastic DIP ASM802MCPAF ASM802MCSAF 4.25 to 4.50 0 to +70 8-SO ASM802MCSAF ASM802MEPAF 4.25 to 4.50 -40 to +85 8-Plastic DIP ASM802MEPAF ASM802MESAF 4.25 to 4.50 -40 to +85 8-SO ASM802MESAF ASM805LCPAF 4.5 to 4.75 0 to +70 8-Plastic DIP ASM805LCPAF ASM805LCSAF 4.5 to 4.75 0 to +70 8-SO ASM805LCSAF ASM802M ASM805L ASM805LEPAF 4.5 to 4.75 -40 to +85 8-Plastic DIP ASM805LEPAF ASM805LESAF 4.5 to 4.75 -40 to +85 8-SO ASM805LESAF Notes: • For parts to be packed in Tape and Reel, add “-T” at the end of the part number. • PulseCore Semiconductor's lead free parts are RoHS compliant. µP Power Supply Supervisor With Battery Backup Switch Notice: The information in this document is subject to change without notice. 14 of 15 ASM690A/692A ASM802L/802M ASM805L April 2008 rev 1.7 PulseCore Semiconductor Corporation 1715 S. Bascom Ave Suite 200 Campbell, CA 95008 Tel: 408-879-9077 Fax: 408-879-9018 www.pulsecoresemi.com Copyright © PulseCore Semiconductor All Rights Reserved Part Number: ASM690A / 692A ASM802L / 802M ASM805L Document Version: 1.7 © Copyright 2006 PulseCore Semiconductor Corporation. All rights reserved. Our logo and name are trademarks or registered trademarks of PulseCore Semiconductor. All other brand and product names may be the trademarks of their respective companies. PulseCore reserves the right to make changes to this document and its products at any time without notice. PulseCore assumes no responsibility for any errors that may appear in this document. The data contained herein represents PulseCore’s best data and/or estimates at the time of issuance. PulseCore reserves the right to change or correct this data at any time, without notice. If the product described herein is under development, significant changes to these specifications are possible. The information in this product data sheet is intended to be general descriptive information for potential customers and users, and is not intended to operate as, or provide, any guarantee or warrantee to any user or customer. PulseCore does not assume any responsibility or liability arising out of the application or use of any product described herein, and disclaims any express or implied warranties related to the sale and/or use of PulseCore products including liability or warranties related to fitness for a particular purpose, merchantability, or infringement of any intellectual property rights, except as express agreed to in PulseCore’s Terms and Conditions of Sale (which are available from PulseCore). All sales of PulseCore products are made exclusively according to PulseCore’s Terms and Conditions of Sale. The purchase of products from PulseCore does not convey a license under any patent rights, copyrights; mask works rights, trademarks, or any other intellectual property rights of PulseCore or third parties. PulseCore does not authorize its products for use as critical components in life-supporting systems where a malfunction or failure may reasonably be expected to result in significant injury to the user, and the inclusion of PulseCore products in such life-supporting systems implies that the manufacturer assumes all risk of such use and agrees to indemnify PulseCore against all claims arising from such use. µP Power Supply Supervisor With Battery Backup Switch Notice: The information in this document is subject to change without notice. 15 of 15