3-Pin Microprocessor Reset Monitor (Preliminary) Description The SE809 Features SE809 is a cost-effective system ¾ 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. Precision VCC Monitor for 2.8V, 3.0V, 3.3V, and 5.0V Supplies ¾ 200mSec typical RESET Output Delay. ¾ RESET Output Guaranteed to VCC=1.0V ¾ Low 7μA Supply Current typical. ¾ VCC Transient Immunity ¾ Small SOT-23 Package and TO-92 Package The reset output is driven active within 20μsec ¾ No External Components of VCC falling through the reset voltage threshold. ¾ Wide Operating Temperature: 0°C to 85°C Reset is maintained active after VCC rises above the ¾ 100% Lead (Pb)-Free 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 Application glitches on the VCC line. Low supply current of 18μA (VCC=3.3V) makes these devices suitable for battery ¾ Computers powered applications. The output voltages range ¾ Embedded systems from 1.7V to 4.5V in 100mV increments. Standard ¾ Battery powered equipment voltage versions are 2.30, 2.63, 2.93, 3.08, 4.0, ¾ Critical µP power supply monitoring 4.38, and 4.63V. Pin Configuration Application Diagram Revision 1/7/2008 Preliminary and all contents are subject to change without prior notice. © Seaward Electronics, Inc., 2007. • www.seawardinc.com 1 3-Pin Microprocessor Reset Monitor (Preliminary) SE809 Ordering/Marking Information (SOT23) Ordering Information Marking Information SE809xS S809xa • Suffix Reset VCC threshold(V) L 4.63 M 4.38 J 4.00 T 3.08 S 2.93 R 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. Ordering/Marking Information (TO92) Ordering Information Marking Information SE809Z SE809Z XXXX is the batch number. XXXX-LF Lead-free package is indicated by LF after Suffix Reset VCC threshold(V) Z 2.30 XXXX. Absolute Maximum Ratings(1) Parameter Symbol Value Units Input Voltage VCC 5.5 V Output Voltage RESET -0.3 to (VCC + 0.3) V 20 mA Input Current Output Current Power Dissipation IOUT PD Output Short Circuit Duration 20 mA Internally Limited (3) Infinite Thermal Resistance, Junction-to-Ambient ΘJA 230 °C/W Operating Temperature Range TA 0 ~ 85 ℃ 260 °C Lead Temperature (Soldering, 10 sec.) Junction Temperature TJ 0 to +125 °C Storage Temperature TS -60 to +150 °C Operating Rating(2) Parameter Symbol Value Units Supply Input Voltage VCC +2.0V to +5.5 V Junction Temperature TJ 0 to +125 °C Revision 1/7/2008 Preliminary and all contents are subject to change without prior notice. © Seaward Electronics, Inc., 2007. • www.seawardinc.com 2 3-Pin Microprocessor Reset Monitor (Preliminary) SE809 Electrical Characteristics Vcc=5V for L/M/J ;3.3V for T/S ;3.0V for R ,TA = 25°C, unless otherwise specified. Symbol Parameter VCC Input Voltage 2.0 ICC Supply Current -SE809L-4.63V VTH Reset Threshold Condition Max Unit 5.5 V 7 10 μA 4.54 4.63 4.72 SE809M-4.38V 4.29 4.38 4.47 SE809J-4.00V 3.92 4.00 4.08 SE809T-3.08V 3.02 3.08 3.14 SE809S-2.93V 2.87 2.93 2.99 SE809R-2.63V 2.58 2.63 2.68 SE809R-2.30V 2.18 2.25 2.33 -- 30 -- ppm/°C -- 20 -- μsec -- 200 Reset Threshold Temperature Coefficient(4) VCC to Reset Delay VCC = VTH to (VTH – 100mV) Reset Active Timeout Period Min Typ V msec VOL RESET Output Voltage Low ISINK = 3mA -- -- 0.4 V VOH RESET Output Voltage High ISOURCE = 800μA 0.8VCC -- -- V PIN DESCRIPTION: Pin No. Symbol Description 1 GND Ground 2 RESET 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)/ΘJA. 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. © Seaward Electronics, Inc., 2007. • www.seawardinc.com 3 3-Pin Microprocessor Reset Monitor (Preliminary) SE809 OUTLINE DRAWING SOT-23 C J H B N DIM A B C D E F G H J K L D A E F G K L 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 - OUTLINE DRAWING TO-92 A DIMN B D E G F H K J 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 Revision 1/7/2008 Preliminary and all contents are subject to change without prior notice. © Seaward Electronics, Inc., 2007. • www.seawardinc.com 4 5.207 5.334 15.50 0.533 1.397 2.667 2.667 4.191 3.04 1.40 2.64 1.03 2.05 0.60 0.51 0.10 1.02 0.18 0.69 3-Pin Microprocessor Reset Monitor (Preliminary) 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: [email protected] 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: [email protected] 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. © Seaward Electronics, Inc., 2007. • www.seawardinc.com 5 SE809