ISSUED DATE :2006/08/18 REVISED DATE : GN809 Processor Supervisory Description The GN809 family allows the user to customize the CPU reset function without any external components. The user has a large choice of reset voltage thresholds and output driver configurations, all of which are preset at the factory. Each wafer is trimmed to the customer’s specifications. These circuits monitor the power supply voltage of up based systems. When the power supply voltage drops below the voltage threshold a reset is asserted immediately (within an interval TD1). The reset remains asserted after the supply voltage rises above the voltage threshold for a time interval, TD2. The reset output is active low (RESETB). The reset output may be configured as either push/pull or open drain. The state of the reset output is guaranteed to be correct for supply voltage greater than 1V. Space saving SOT-23 package and micropower quiescent current (<3.0uA) make this family a natural for portable battery powered equipment. Features Tight Voltage Threshold Tolerance ±1.5% Wide Temperature Range -40 to 80 Low Quiescent Current <3.0uA Lead Free Products Meet RoHS standards Typical Operating Circuit GN809 Applications Power Supplies Data Acquisition Systems Applications using CPUs Consumer Electronics Computer Peripherals Portable Electronics Note:* External pull-up resistor is required if open-drain output is used. 10k is recommended. Package Dimensions SOT-23 REF. A B C D E F Millimeter Min. Max. 2.70 3.10 2.40 2.80 1.40 1.60 0.35 0.50 0 0.10 0.45 0.55 REF. G H K J L M Millimeter Min. Max. 1.90 REF. 1.00 1.30 0.10 0.20 0.40 0.85 1.15 0 10 Block Diagram GN809 with Push-Pull RESET GN809 Page: 1/4 ISSUED DATE :2006/08/18 REVISED DATE : Pin Description Pin Name Pin Description Gnd Ground RESETB RESETB is active low and push-pull output VIN Positive power supply. A reset is asserted after this voltage drops below a predetermined. After VIN rises above that level the reset output remains asserted until the end of the reset timeout period. Absolute Maximum Ratings Parameter Symbol Ratings Unit VIN 7 V Input Current, VIN 20 mA Output Current, RESETB 20 mA 100 V/ s Input Voltage Rate of Rise, VIN Ambient Temperature Range TA -40 ~ +85 Junction Temperature Range TJ -40 ~ +125 Storage Temperature Range TSTG -65 ~ +150 Maximum Junction Temperature Tj Max 150 jc 140 Thermal Resistance Internal Power Dissipation /W ja 285 /W PD 400 mW Solder Iron (10 Sec)* 350 EDS Classification B** Caution: Stress above the listed absolute maximum rating may cause permanent damage of the device *MIL-STDS-202G 210F **HBM B: 2000V ~ 3999V Electrical Characteristics Ta=25 Parameter VIN Range Supply Current Reset Threshold Voltage Symbol VRange IIN (unless otherwise noted) Min TYP Max Unit TA=-40 ~ +85 Condition 1 - 5.5 V VIN= VTH*1.10 - - 3.0 VIN= VTH*1.10, TA=-40 ~ +85 - - 5.0 VTH(NOM) - VTH(NOM) VTH(NOM) - VTH(NOM) 10 30 60 mV 30 50 160 ppm - - 0.2 V 0.8*VIN - - V -1.5% VTH TA=-40 ~ +85 Hysteresis Range (Note2) RESET Threshold Tempco (Note2) RESETB Output Voltage Low VHYST VOL -2.0% VRelease-VTH (Note1) VIN<VTH(MIN), ISINK=1.2mA TA=-40 ~ +85 ISOURCE=0.5mA VIN>1.8V RESETB Output Voltage High VOH VIN>VTH(MAX) VIN to Reset Delay Reset Timeout Period TD1 TD2 VIN= VTH-100mV, TA=-40 ~ +85 TA=-40 ~ +85 ISOURCE=0.15mA 1.8V VIN>1.0V A +1.5% mV +2.0% - 40 - 80 150 230 S mS Note 1: The data based on V TH=2.7V part type. 2: Guaranteed by Design GN809 Page: 2/4 ISSUED DATE :2006/08/18 REVISED DATE : Ordering Information ( contd.) Part Number Marking Output Voltage Part Number Marking Output Voltage GN809-20 820XX 2.00V GN809-21 821XX 2.10V GN809-23 823XX 2.32V GN809-26 826XX 2.63V GN809-29 829XX 2.93V GN809-31 831XX 3.08V GN809-46 846XX 4.63V Timing Diagram Application Information Supply Transients These device have a certain immunity to fast negative going transients. In the following pages the graph titled “Glitch Rejection” indicates the maximum allowable glitch amplitude and duration to avoid triggering an unintended reset. As shown in the graph shorter transient can have large amplitudes without triggering resets. Characteristics Curve GN809 Page: 3/4 ISSUED DATE :2006/08/18 REVISED DATE : GN809-26 GN809-26 GN809-26 210 190 170 150 GN809-26 130 110 90 Important Notice: All rights are reserved. Reproduction in whole or in part is prohibited without the prior written approval of GTM. GTM reserves the right to make changes to its products without notice. GTM semiconductor products are not warranted to be suitable for use in life-support Applications, or systems. GTM assumes no liability for any consequence of customer product design, infringement of patents, or application assistance. Head Office And Factory: Taiwan: No. 17-1 Tatung Rd. Fu Kou Hsin-Chu Industrial Park, Hsin-Chu, Taiwan, R. O. C. TEL : 886-3-597-7061 FAX : 886-3-597-9220, 597-0785 China: (201203) No.255, Jang-Jiang Tsai-Lueng RD. , Pu-Dung-Hsin District, Shang-Hai City, China TEL : 86-21-5895-7671 ~ 4 FAX : 86-21-38950165 GN809 Page: 4/4