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| 3-Pin Microprocessor Reset Monitor (Preliminary) Description The SE809 is a cost-effective system supervisor Integrated Circuit (IC) designed to monitor VCC in digital and mixed signal systems and provide a warning signal when the system power supply is out of working range, and a reset signal to the host processor when necessary. No external components are required. The reset output is driven active within 20sec of VCC falling through the reset voltage threshold. Reset is maintained active after VCC rises above the reset threshold. The SE809 has an active-low RESET output. The output of the SE809 is guaranteed valid down to VCC=1V. The SE809 is optimized to reject fast transient glitches on the VCC line. Low supply current of 18A (VCC=3.3V) makes these devices suitable for battery powered applications. The output voltages range from 1.7V to 4.5V in 100mV increments. Standard voltage versions are 2.30, 2.63, 2.93, 3.08, 4.0, 4.38, and 4.63V. Computers Embedded systems Battery powered equipment SE809 Features Precision VCC Monitor for 2.8V, 3.0V, 3.3V, and 5.0V Supplies 200mSec typical RESET Output Delay. RESET Output Guaranteed to VCC=1.0V Low 7A Supply Current typical. VCC Transient Immunity Small SOT-23 Package and TO-92 Package No External Components Wide Operating Temperature: 0C to 85C 100% Lead (Pb)-Free Application Critical P power supply monitoring Pin Configuration Application Diagram Revision 1/7/2008 Preliminary and all contents are subject to change without prior notice. (c) Seaward Electronics, Inc., 2007. * www.seawardinc.com 1 3-Pin Microprocessor Reset Monitor (Preliminary) Ordering/Marking Information (SOT23) Ordering Information SE809xS Marking Information SE809 S809xa * Reset VCC threshold(V) 4.63 4.38 4.00 3.08 2.93 2.63 The "x" denotes a suffix for VCC threshold. The last character is the batch number. A dot on top right corner is for lead-free process. Suffix L M J T S R Ordering/Marking Information (TO92) Ordering Information SE809Z Marking Information SE809Z XXXX-LF Suffix Z Reset VCC threshold(V) 2.30 XXXX is the batch number. Lead-free package is indicated by LF after XXXX. Absolute Maximum Ratings(1) Parameter Input Voltage Output Voltage Input Current Output Current Power Dissipation Output Short Circuit Duration Thermal Resistance, Junction-to-Ambient Operating Temperature Range Lead Temperature (Soldering, 10 sec.) Junction Temperature Storage Temperature TJ TS JA TA IOUT PD Symbol VCC RESET Value 5.5 -0.3 to (VCC + 0.3) 20 20 Internally Limited Infinite 230 0 ~ 85 260 0 to +125 -60 to +150 C/W C C C (3) Units V V mA mA Operating Rating(2) Parameter Supply Input Voltage Junction Temperature Revision 1/7/2008 Preliminary and all contents are subject to change without prior notice. (c) Seaward Electronics, Inc., 2007. * www.seawardinc.com 2 Symbol VCC TJ Value +2.0V to +5.5 0 to +125 Units V C 3-Pin Microprocessor Reset Monitor (Preliminary) Electrical Characteristics Vcc=5V for L/M/J ;3.3V for T/S ;3.0V for R ,TA = 25C, unless otherwise specified. SE809 Symbol VCC ICC Parameter Input Voltage Supply Current Condition Min 2.0 -- Typ Max 5.5 Unit V A 7 4.63 4.38 4.00 3.08 2.93 2.63 2.25 30 10 4.72 4.47 4.08 3.14 2.99 2.68 2.33 -- SE809L-4.63V SE809M-4.38V SE809J-4.00V VTH Reset Threshold SE809T-3.08V SE809S-2.93V SE809R-2.63V SE809R-2.30V Reset Threshold Temperature Coefficient(4) VCC to Reset Delay VCC = VTH to (VTH - 100mV) Reset Active Timeout Period VOL VOH RESET Output Voltage Low RESET Output Voltage High ISINK = 3mA ISOURCE = 800A 4.54 4.29 3.92 3.02 2.87 2.58 2.18 -- V ppm/C ---0.8VCC 20 200 --- -- sec msec 0.4 -- V V PIN DESCRIPTION: Pin No. 1 2 Symbol GND RESET Description Ground RESET output remains low while Vcc is below the reset voltage threshold and for 200msec(typ) after Vcc rises above reset threshold 3 Vcc Supply Voltage (typ.) Note 1: Exceeding the absolute maximum rating may damage the device. Note 2: The device is not guaranteed to function outside its operating rating. Note 3: The maximum allowable power dissipation at any TA (ambient temperature) is calculated using: PD(MAX) = (TJ(MAX) - TA)/JA. Exceeding the maximum allowable power dissipation will result in excessive die temperature, and the regulator will go into thermal shutdown. See "Thermal Consideration" section for details Note 4: RESET threshold temperature coefficient is the worst case voltage change divided by the total temperature range. Revision 1/7/2008 Preliminary and all contents are subject to change without prior notice. (c) Seaward Electronics, Inc., 2007. * www.seawardinc.com 3 3-Pin Microprocessor Reset Monitor (Preliminary) OUTLINE DRAWING SOT-23 C J B H SE809 DIM A B C D E F G H J K L N DIMENSIONS INCHES MM MIN MAX MIN MAX 0.110 0.047 0.083 0.035 0.070 0.018 0.015 0.0005 0.034 0.003 0.120 0.055 0.104 0.040 0.080 0.024 0.020 0.004 0.040 0.007 0.027 2.80 1.20 2.10 0.89 1.78 0.45 0.37 0.013 0.887 0.085 3.04 1.40 2.64 1.03 2.05 0.60 0.51 0.10 1.02 0.18 0.69 D A E F G K L OUTLINE DRAWING TO-92 A B D DIMN A B E F G H J K DIMENSIONS INCHES MM MIN MAX MIN MAX 0.175 0.170 0.500 0.016 0.045 0.095 0.080 0.125 0.205 0.210 0.610 0.021 0.055 0.105 0.105 0.165 4.445 4.318 12.70 0.407 1.143 2.413 2.032 3.175 5.207 5.334 15.50 0.533 1.397 2.667 2.667 4.191 E G F H K J Revision 1/7/2008 Preliminary and all contents are subject to change without prior notice. (c) Seaward Electronics, Inc., 2007. * www.seawardinc.com 4 3-Pin Microprocessor Reset Monitor (Preliminary) SE809 Contact Information Seaward Electronics Incorporated - China Rm 1605, Building 1, International Pioneering Park, #1 Shangdi Xinxi Rd Haidian District, Beijing 100085, China Tel: 86-10-8289-5700/01/05 Fax: 86-10-8289-5706 Email: sales@seawardinc.com.cn Seaward Electronics Corporation - Taiwan 2F, #181, Sec. 3, Minquan East Rd, Taipei, Taiwan R.O.C Tel: 886-2-2712-0307 Fax: 886-2-2712-0191 Email: sales@seawardinc.com.tw Seaward Electronics Incorporated - North America 1512 Centre Pointe Dr. Milpitas, CA95035, USA Tel: 1-408-821-6600 Last Updated - 1/7/2008 Revision 1/7/2008 Preliminary and all contents are subject to change without prior notice. (c) Seaward Electronics, Inc., 2007. * www.seawardinc.com 5 |
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