Preliminary Datasheet Microprocessor Supervisory Circuit in 3-Pin SOT23 SG809 SG810 GENERAL DESCRIPTION FEATURES The SG809/SG810 supervisory circuits monitor the power supply voltage in microprocessor and digital systems. They provide a reset output during power-up, power-down and brownout conditions. On power-up, an internal timer holds reset asserted for 240 ms. This holds the microprocessor in a reset state until conditions have stabilized. The RESET output remains operational with VCC as low as 1 V. The SG809 provides an active low reset signal ( RESET ) while the SG810 provides an active high signal (RESET) output. Six reset threshold voltage options are available suitable for monitoring 3V, 3.3V, and 5V supply voltages. The reset comparator features built-in glitch immunity, making it immune to fast transients on VCC. The low supply current of typically 17µA makes the SG809/SG810 ideal for use in portable, battery operated equipment. They are available in the 3-pin SOT23 package. − Precision Voltage Monitor: 3 V, 3.3 V, 5 V Options − Superior Upgrade for MAX809/MAX810 and APPLICATIONS PIN CONFIGURATIONS（TOP VIEW） ADM809/ADM810 Fully Specified over Temperature Low Power Consumption (17μA Typ) Reset Assertion Down to 1 V VCC 160 ms Min Power-On Reset Logic Low RESET Output (SG809) Logic High RESET Output (SG810) − Compact 3-Pin SOT23 Package − − − − Microprocessor Systems Controllers Intelligent Instruments Automotive Systems Safety Systems Portable Instruments SG809/SG810 GND 1 3 RESET/RESET VCC 2 SOT23-3 TYPICAL OPERATION CIRCUIT VCC MICROPROCESSOR SYSTEM SG809 RESET GND Shengbang Microelectronics Co, Ltd Tel: 86/451/84348461 www.sg-micro.com VCC RESET GND Apr 2006 ORDERING INFORMATION MODEL SG809 SG810 RESET THRESHOLD (V) SPECIFIED TEMPERATURE RANGE 4.63 - 40°C to +125°C 4.38 - 40°C to +125°C 4.00 - 40°C to +125°C 3.08 2.93 ORDERING NUMBER PACKAGE MARKING PACKAGE OPTION SG809-LXN3 809L Tape and Reel, 3000 SG809-MXN3 809M Tape and Reel, 3000 SG809-JXN3 809J Tape and Reel, 3000 - 40°C to +125°C SG809-TXN3 809T Tape and Reel, 3000 - 40°C to +125°C SG809-SXN3 809S Tape and Reel, 3000 2.63 - 40°C to +125°C SG809-RXN3 809R Tape and Reel, 3000 4.63 - 40°C to +125°C SG810-LXN3 810L Tape and Reel, 3000 4.38 - 40°C to +125°C SG810-MXN3 810M Tape and Reel, 3000 4.00 - 40°C to +125°C SG810-JXN3 810J Tape and Reel, 3000 3.08 - 40°C to +125°C SG810-TXN3 810T Tape and Reel, 3000 2.93 - 40°C to +125°C SG810-SXN3 810S Tape and Reel, 3000 2.63 - 40°C to +125°C SG810-RXN3 810R Tape and Reel, 3000 PIN DESCRIPTION NAME Pin Number FUNCTION SG809 SG810 GND 1 1 Ground RESET 2 — Active Low reset. RESET remains low while VCC is below the reset threshold, and remains low for 240 ms (typ) after VCC rises above the reset threshold. RESET — 2 VCC 3 3 Active High reset. RESET remains high while VCC is below the reset threshold, and remains high for 240 ms (typ) after VCC rises above the reset threshold. Power supply voltage that is monitored. ABSOLUTE MAXIMUM RATINGS (Typical values are at TA = 25°C, unless otherwise noted.) VCC................................................................................–0.3 V to +6 V RESET, RESET ...............................................–0.3 V to VCC +0.3 V Input Current , VCC.................................................................20 mA Output Current, RESET, RESET ......................................... 20 mA Rate of Rise, VCC .................................................................100 V/µs Internal Power Dissipation SOT23-3 ..................................................................................... 0.5W Operating Temperature Range...........................- 40°C to +125°C Junction Temperature...........................................................+150°C Storage Temperature.............................................- 65°C to +150°C Lead Temperature (soldering, 10s).....................................+300°C Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. 2 SG809/810 ELECTRICAL CHARACTERISTICS (VCC Typ = 5 V for L/M/J Models, 3.3 V for T/S Models, 3 V for R Models; unless otherwise noted.) PARAMETER SUPPLY Voltage CONDITIONS MIN MAX UNITS TA = 0°C to 70°C 1.0 5.5 V TA = - 40°C to +125°C 1.2 5.5 V VCC < 5.5 V, SG8_L/M/J, TA = 25°C Current TYP 20 VCC < 5.5 V, SG8_L/M/J, TA = - 40°C to +125°C VCC < 3.6 V, SG8_R/S/T, TA = 25°C 17 VCC < 3.6 V, SG8_R/S/T, TA = - 40°C to +125°C 30 µA 50 µA 25 µA 45 µA 4.723 V 4.86 V 4.468 V 4.56 V 4.08 V 4.2 V 3.157 V 3.23 V 3.03 V 3.08 V 2.696 V 2.76 V RESET VOLTAGE THRESHOLD SG8_L SG8_M SG8_J SG8_T SG8_S SG8_R TA = 25°C 4.537 TA = - 40°C to +125°C 4.40 TA = 25°C 4.292 TA = - 40°C to +125°C 4.16 TA = 25°C 3.92 TA = - 40°C to +125°C 3.8 TA = 25°C 3.003 TA = - 40°C to +125°C 2.92 TA = 25°C 2.857 TA = - 40°C to +125°C 2.78 TA = 25°C 2.564 TA = - 40°C to +125°C 2.50 RESET THRESHOLD Temperature Coefficient VCC to RESET/ RESET Delay VCC = VTH to (VTH –100 mV) TA = - 40°C to +85°C 160 TA = - 40°C to +125°C 100 4.63 4.38 4.00 3.08 2.93 2.63 30 ppm/°C 20 µs 240 560 ms 840 ms Reset Active Timeout Period RESET/ RESET OUTPUT VOLTAGE Low (SG809R/S/T) VCC = VTH(MIN), ISINK = 1.2mA 0.3 V Low (SG809L/M/J) VCC = VTH(MIN), ISINK = 3.2mA 0.4 V VCC > 1.0 V, ISINK = 50µA 0.3 V Low (SG809R/S/T/L/M/J) High (SG809R/S/T) VCC > VTH(MAX), ISOURCE = 500µA 0.8×VCC V High (SG809L/M/J) VCC > VTH(MAX), ISOURCE = 800µA VCC– 1.5 V Low (SG810R/S/T) VCC = VTH(MAX), ISINK = 1.2mA 0.3 V Low (SG810L/M/J) VCC = VTH(MAX), ISINK = 3.2mA 0.4 V High (SG810 R/S/T/L/M/J) 1.8 V < VCC < VTH(MIN), ISOURCE = 150µA V 0.8×VCC Specifications subject to change without notice. ３ SG809/810 TYPICAL PERFORMANCE CHARACTERISTICS Power-Down RESET Delay vs.Temperature Power-Down RESET Delay vs.Temperature 300 250 SG809T/S/R VOD = VTH - VCC Power-Down RESET (µS) Power-Down RESET (µS) SG809L/M/J 200 VOD = 10mV 150 VOD = 20mV 100 VOD = 200mV VOD = 100mV 50 250 200 VOD = 20mV 150 100 -50 -30 -10 10 30 50 70 90 -50 -30 -10 110 130 30 50 70 90 110 130 Supply Current vs. Temperature (No Load) Power-Up RESET Delay vs.Temperature 30 264 262 10 Temperature(℃) Temperature(℃) SG809S VCC = 5.5V 25 260 Supply Current (µA) Power-Down RESET (mS) VOD = 200mV VOD = 100mV 50 0 0 258 256 254 252 250 20 VCC = 3.6V 15 10 5 0 248 -50 -30 -10 10 30 50 70 90 110 130 -50 -30 -10 10 30 50 70 90 110 130 Temperature(℃) Temperature(℃) Normalized RESET Voltage Threshold vs. Temperature Maximum Transient Duration Without Causing a Reset Pulse vs. RESET Comparator Overdrive Maximum Transient Duration (µS) 1.008 Normalized RESET Threshold VOD = VTH - VCC VOD = 10mV 1.006 1.004 1.002 1 0.998 0.996 0.994 0.992 0.99 0.988 400 350 300 SG809L/M/J 250 200 150 100 SG809T/S/R 50 0 -50 -30 -10 10 30 50 70 90 110 130 1 10 100 1000 RESET Comparator Overdrive, VTH - VCC(mV) Temperature(℃) ４ SG809/810 TYPICAL PERFORMANCE CHARACTERISTICS RESET Output Voltage vs. Supply Voltage Supply Voltage 5VP-P 2V/div RESET Output Voltage SG809R SG809S 200ms/div ５ SG809/810 PACKAGE OUTLINE DIMENSIONS SOT23-3 Symbol A A1 A2 b c D E E1 e e1 L L1 θ Dimensions In Millimeters Dimensions In Inches Min Max Min Max 1.050 1.250 0.041 0.049 0.000 0.100 0.000 0.004 1.050 1.150 0.041 0.045 0.300 0.400 0.012 0.016 0.100 0.200 0.004 0.008 2.820 3.020 0.111 0.119 1.500 1.700 0.059 0.067 2.650 2.950 0.104 0.116 0.950TYP 0.037TYP 1.800 2.000 0.071 0.079 0.700REF 0.028REF 0.300 0.600 0.012 0.024 0° 8° 0° 8° ６ SG809/810