aic AIC809/810 3-Pin Microprocessor Reset Circuits
Contents
1. supervisors RESET output directly to the microcontroller s RESET with a single pull up resistor allows either device to assert reset ap aic AIC809 AIC810 E PHYSICAL DIMENSIONS unit mm SOT 23 SOT 23 MILLIMETERS A2 Vi M B L 2 Ea p e e SN gt x 0 95 BSC 1 90 BSC A WITH PLATING 5 BASE METAL SECTION A A 0 60 REF Al 0 25 1 GAUGE PLANE iw SEATING PLANE Note Information provided by AIC is believed to be accurate and reliable However we cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in an AIC product nor for any infringement of patents or other rights of third parties that may result from its use We reserve the right to change the circuitry and specifications without notice Life Support Policy AIC does not authorize any AIC product for use in life support devices and or systems Life support devices or systems are devices or systems which I are intended for surgical implant into the body or ii support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the labeling can be reasonably expected to result in a significant injury to the user WWW ALLDATASHEET COM Copyright Each Manufacturing Company All Datasheets cannot be modified without permission This datasheet has been download from www AllDataSheet2. ID FEATURES AIC809 AIC810 3 Pin Microprocessor Reset Circuits e Ultra Low Supply Current 1pA typ e Guaranteed Reset Valid to Vcc 0 9V e Available in Three Output Type Open Drain Active Low AIC809N Push Pull Active Low 809 Push Pull Active High 810 e 140ms Min Power On Reset Pulse Width e Internally Fixed Threshold 2 3V 2 6V 2 9V 3 1V 4 0V 4 4V 4 6V e Tight Voltage Threshold Tolerance 1 5 e Tiny Package in SOT 23 APPLICATIONS e Notebook Computers e Digital Still Cameras e PDAs e Critical Microprocessor Monitoring TYPICAL APPLICATION CIRCUIT VCC AIC809 810 GND Push Pull Output DESCRIPTION AIC809 AIC810 are low power microprocessor uP supervisory circuits used to monitor power supplies in and digital systems They provide applications with benefits of circuit reliability and low cost by eliminating external components These devices perform as valid singles in applications with Vcc ranging from 6 0V down to 0 9V The reset signal lasts for a minimum period of 140ms whenever VCC supply voltage falls below preset threshold Both AIC809 and AIC810 were designed with a reset comparator to help identify invalid signals which last less than 140ms The only difference between them is that they have an active low RESET output and active high RESET output respectively Low supply current 1 makes
3. AIC809 AIC810 ideal for portable equipment The devices are available in SOT 23 package Analog Integrations Corporation Si Soft Research Center DS 809P 02 010405 3A1 No 1 Li Hsin Rd 1 Science Park Hsinchu 300 Taiwan R O C TEL 886 3 5772500 FAX 886 3 5772510 www analog com tw 1 ap aic AIC809 AIC810 ORDERING INFORMATION AIC809X XXXXXX PIN CONFIGURATION AIC810 XXXXXX SOT 23 PACKING TYPE TOP VIEW TR TAPE amp REEL 1 GND BG BAG 2 RESET RESET 3 VCC PACKAGE TYPE U SOT 23 C COMMERCIAL P LEAD FREE COMMERCIAL RESET THRESHOLD VOLTAGE 23 2 3V 26 2 6V 29 2 9V 31 3 1V 40 4 0V 44 4 4V 46 4 6V OUTPUT TYPE DEFAULT Push Pull type N N ch Open Drain type Additional voltage versions with a unit of 0 1V within the voltage range from 1 5V to 5 5V for this product line may be available on demand with prior consultation with AIC Example 809 31 gt 3 1V and push pull version in SOT 23 Package amp Tape amp Reel Packing Type AIC809 31 PUTR gt 3 1V and push pull version in Lead Free SOT 23 Package amp Tape amp Reel Packing Type SOT 23 Marking Part No Marking Part No Marking Part No Marking AIC809 23CU RA23 AIC809N23CU RB23 AIC810 23CU RD23 AIC809 26CU RA26 AIC809N26CU 26 AIC810 26CU RD26 AIC809 29CU RA29 AIC809N29CU RB29 AIC810 29CU RD29 AIC809 31CU RA
4. the 40 C to 85 C operating temperature range are assured by design characterization and correlation with Statistical Quality Controls SQC Note2 RESET output is for AIC809 RESET output is for 810 ID Supply Current uA 0 9 0 8 0 7 0 6 0 5 40 20 0 20 40 60 80 100 Temperature C Fig 1 Supply Current vs Temperature 240 220 3 1 200 50 m Vop 100mV Power Down Reset Delay uS 20 200 60 40 20 0 20 4 60 80 100 Temperature Fig 3 Power Down Reset Delay vs Temperature VTH 4 6V Normalized Reset Threshold V 5 40 20 0 20 40 60 80 100 Temperature C Fig 5 Normalized Reset Threshold vs Temperature AIC809 AIC810 TYPICAL PERFORMANCE CHARACTERISTICS N a 40 Power Down Reset Delay uS 60 40 20 0 20 40 60 80 100 Temperature C Fig 2 Power Down Reset Delay vs Temperature 400 VTH 4 6V amp wn 200 Sn ee Vop 100mV 8 5 100 a Vop 200mV 60 40 20 0
5. 20 4 60 80 100 Temperature Fig 4 Power Down Reset Delay vs Temperature 600 500 400 300 200 Power Up Reset Timeout mS 60 40 20 0 20 40 60 80 100 Temperature C Fig 6 Power Up Reset Timeout vs Temperature ap aic AIC809 AIC810 BLOCK DIAGRAMS Bandgap Reset Generator N ch Open Drain Type RESET RESET Reset Generator Push Pull Type ID PIN DESCRIPTIONS AIC809 AIC810 RESET Pin 809 Active low output pin RESET Output remains low while Vcc is below the reset RESET Pin 810 Active high output pin RESET output remains high while Vcc is below the reset GND Pin Ground threshold threshold Vcc Pin Supply voltage DETAIL DESCRIPTIONS OF TECHNICAL TERMS RESET OUTPUT uP will be activated at a valid reset state These uP supervisory circuits assert reset to prevent code execution errors during power up power down or brownout conditions RESET is guaranteed to be a logic low for VtH gt VCC gt 0 9V Once VCC exceeds the reset threshold an internal timer keeps RESET low for the reset timeout period after this interval RESET goes high If a brownout condition occurs VCC drops below the reset threshold RESET goes low Any time VCC goes below the reset threshold the internal timer resets to zero and RESET goes low The APPLICATION INFORMATION NEGATIVE GOIN
6. 31 AIC809N31CU RB31 AIC810 31CU 031 AIC809 40CU RA40 AIC809N40CU RB40 AIC810 40CU RD40 AIC809 44CU RA44 AIC809N44CU RB44 AIC810 44CU RD44 AIC809 46CU RA46 AIC809N46CU RB46 AIC810 46CU RD46 ap aic AIC809 AIC810 Part No Marking Part No Marking Part No Marking AIC809 23PU RA23P AIC809N23PU RB23P AIC810 23PU RD23P AIC809 26PU 26 AIC809N26PU RB26P AIC810 26PU_ RD26P AIC809 29PU RA29P AIC809N29PU_ RB29P AIC810 29PU RD29P AIC809 31PU RA31P AIC809N31PU_ RB31P AIC810 31PU RD31P AIC809 40PU RA4OP AIC809N40PU_ RB40P AIC810 40PU RD40P AIC809 44PU RA44P AIC809N44PU_ RB44P 810 44 0 RD44P AIC809 46PU RA46P AIC809N46PU_ RB46P 810 46 0 RD46P ABSOLUTE MAXIMUM RATINGS 0 3V 6 5V RESEE RES EW sit 0 3V VCC 0 3V Input Curent Voo era Siete tae ality 20 Output Current RESET or RESET R i CO Oaa 20mA Continuous Power Dissipation Ta 70 C R C Oaa L 320mMW Operating Junction Temperature Range sss 40 85 C Junction Temperature 1 E 125 Storage Temperature Range 65 C 150 C Lead Temperature Soldering 10 F kC O k L 260 C Absolute Maximum Ratings are those values beyond which the life of a device may be imp
7. G VCC TRANSIENTS In addition to issuing a reset to the uP during power up power down and brownout conditions 809 series are relatively resistant to short duration negative going VCC transient ENSURING A VALID RESET OUTPUT DOWN TO VCC 0 When VCC falls below 0 9V 809 RESET output no longer sinks current it becomes an open circuit In this case high impedance CMOS logic inputs connecting to RESET can drift to undetermined voltages Therefore AlC809 810 with CMOS is perfect for most applications of VCC internal timer is activated after VCC returns above the reset threshold and RESET remains low for the reset timeout period BENEFITS OF HIGHLY ACCURATE RESET THRESHOLD 809 810 with specified voltage as 5V 10 3V 10 are ideal for systems using a 5V 5 3V15 power supply The reset is guaranteed to assert after the power supply falls out of regulation but before power drops below the minimum specified operating voltage range of the system ICs The pre trimmed thresholds are reducing the range over which an undesirable reset may occur below 0 9V However in applications where RESET must be valid down to OV adding a pull down resistor to RESET causes any leakage currents to flow to ground holding RESET low INTERFACING P WITH BIDIRECTIONAL RESET PINS The RESET output on the AIC809N is open drain this device interfaces easily with Ps that have bidirectional reset pins Connecting the
8. aired TEST CIRCUIT ap aic AIC809 AIC810 ELECTRICAL CHARACTERISTICS Typical values are at 25 unless otherwise specified Note 1 PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT Operating Voltage Range 0 9 6 V Supply Current 0 1V 1 3 uA Ta 25 C 2 265 2 3 2 335 809 23 Ta 40 C to 85 2 254 2 346 Ta 25 C 2 561 2 6 2 639 809 26 Ta 40 C to 85 2 548 2 652 Ta 25 C 2 857 2 9 2 944 809 29 Ta 40 C to 85 C 2 842 2 958 Ta t 25 C 3 054 3 1 3 147 Reset Threshold VtH_ AIC809 31 V Ta 40 to 85 C 3 038 3 162 Ta 25 C 3 940 4 0 4 060 809 40 Ta 40 to 85 C 3 920 4 080 Ta 25 C 4 334 4 4 4 466 809 44 Ta 40 to 85 4 312 4 488 Ta 25 C 4 531 4 6 4 669 809 46 Ta 40 C to 85 4 508 4 692 Vcc to Reset Delay Tro Vcc VTtH to Vth 0 1V VTH 3 1V 20 uS Ta 25 C 140 230 560 Reset Active Timeout Period T Vcc V mS RP 00 THAN T 40 C to 85 C 100 1030 V Vec VtTHt0 1V 1 0 8 RESET Output Voltage OH CC VTH SOURCE 1M V VoL 0 1V Isink 1mA 0 2Vcc Vcc VtH 0 1V 1mA 0 8V RESET Output Voltage CCENT OAV SOURCE im VoL 0 1 Isink 1mA 0 2Vcc Note1 Specifications are production tested at 25 Specifications over
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aic AIC809/810 3 Pin Microprocessor Reset Circuits