SGM803 SGM809 SGM810 Microprocessor Supervisory Circuit in 3-Pin SOT23 GENERAL DESCRIPTION FEATURES The SGM803/SGM809/SGM810 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 SGM803/SGM809 provides an active low reset signal ( RESET ) while the SGM810 provides an active high signal (RESET) output. The SGM809/SGM810 have push-pull outputs, whereas the SGM803 has an open-drain output, which requires an external pull-up resistor. Seven reset threshold voltage options are available suitable for monitoring 2.5V, 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 SGM803/SGM809/SGM810 ideal for use in portable, battery operated equipment. They are available in the 3-pin SOT23 package. − Precision Voltage Monitor: 2.5V,3 V, 3.3 V, 5 V Options − Superior Upgrade for MAX803/MAX809/MAX810 and SGM803/SGM809/SGM810 − Fully Specified over Temperature − Low Power Consumption (17μA Typ) − Reset Assertion Down to 1 V VCC − 160 ms Min Power-On Reset Open-Drain RESET Output(SGM803) Push-Pull RESET Output (SGM809) Push-Pull RESET Output (SGM810) − Compact 3-Pin SOT23 Package PIN CONFIGURATIONS（TOP VIEW） APPLICATIONS Microprocessor Systems Controllers Intelligent Instruments Automotive Systems Safety Systems Portable Instruments GND 1 SGM803 SGM809 SGM810 RESET/RESET 3 VCC 3 VCC 2 SOT23-3 TYPICAL OPERATION CIRCUIT RESET VCC SGM803/SGM809 RESET 1 SGM809ZXN3L (only) VCC RPULL-UP SGM803 only MICROPROCESSOR SYSTEM GND 2 RESET SOT23-3(L-Type) GND GND Shengbang Microelectronics Co, Ltd Tel: 86/451/84348461 www.sg-micro.com REV. B ORDERING INFORMATION MODEL SGM803 SGM809 SGM810 RESET THRESHOLD (V) 4.63 4.38 3.08 2.93 2.63 SPECIFIED TEMPERATURE RANGE ORDERING NUMBER PACKAGE MARKING PACKAGE OPTION SGM803-LXN3 SGM803-MXN3 SGM803-TXN3 SGM803-SXN3 SGM803-RXN3 803L 803M 803T 803S 803R 2.32 - 40°C to +125°C - 40°C to +125°C - 40°C to +125°C - 40°C to +125°C - 40°C to +125°C - 40°C to +125°C SGM803-ZXN3 803Z Tape and Reel, 3000 Tape and Reel, 3000 Tape and Reel, 3000 Tape and Reel, 3000 Tape and Reel, 3000 Tape and Reel, 3000 4.63 - 40°C to +125°C SGM809-LXN3 809L Tape and Reel, 3000 4.38 - 40°C to +125°C SGM809-MXN3 809M Tape and Reel, 3000 4.00 - 40°C to +125°C SGM809-JXN3 809J Tape and Reel, 3000 3.08 - 40°C to +125°C SGM809-TXN3 809T Tape and Reel, 3000 2.93 - 40°C to +125°C SGM809-SXN3 809S Tape and Reel, 3000 2.63 - 40°C to +125°C SGM809-RXN3 809R Tape and Reel, 3000 2.32 - 40°C to +125°C SGM809-ZXN3 809Z Tape and Reel, 3000 2.32 - 40°C to +125°C SGM809-ZXN3L 809ZL Tape and Reel, 3000 4.63 - 40°C to +125°C SGM810-LXN3 810L Tape and Reel, 3000 4.38 - 40°C to +125°C SGM810-MXN3 810M Tape and Reel, 3000 4.00 - 40°C to +125°C SGM810-JXN3 810J Tape and Reel, 3000 3.08 - 40°C to +125°C SGM810-TXN3 810T Tape and Reel, 3000 2.93 - 40°C to +125°C SGM810-SXN3 810S Tape and Reel, 3000 2.63 - 40°C to +125°C SGM810-RXN3 810R Tape and Reel, 3000 2.32 - 40°C to +125°C SGM810-ZXN3 810Z Tape and Reel, 3000 2 SGM803/809/810 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 Power Dissipation, PD @ TA = 25℃ SOT23-3 .....................................................................................0.4W Package Thermal Resistance SOT23-3, θJA....................................................................... 250℃/W Operating Temperature Range...........................- 40°C to +125°C Junction Temperature...........................................................+150°C Storage Temperature.............................................- 65°C to +150°C Lead Temperature (soldering, 10s).....................................+260°C ESD Susceptibility HBM..........................................................................................4000V MM..............................................................................................400V 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. PIN DESCRIPTION NAME SGM803 Pin Number SGM809SGM809 ZXN3L FUNCTION SGM810 GND 1 1 2 1 Ground RESET 2 2 1 — 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. Active High reset. RESET remains high while VCC is below the reset RESET — — — 2 threshold, and remains high for 240 ms (typ) after VCC rises above the reset threshold. VCC 3 3 3 3 Power supply voltage that is monitored. 3 SGM803/809/810 ELECTRICAL CHARACTERISTICS (VCC Typ = 5 V for L/M/J Models, 3.3 V for T/S Models, 3 V for R Models, 2.5 V for Z Models; unless otherwise noted.) PARAMETER CONDITIONS MIN TYP MAX UNITS 5.5 V SUPPLY Voltage TA = 0°C to 70°C 1.0 TA = - 40°C to +125°C 1.2 VCC < 5.5 V, SGM8_L/M/J, TA = 25°C 20 VCC < 5.5 V, SGM8_L/M/J, TA = - 40°C to +125°C Current VCC < 3.6 V, SGM8_R/S/T/Z, TA = 25°C 17 VCC < 3.6 V, SGM8_R/S/T/Z, TA = - 40°C to +125°C 5.5 V 30 µA 50 µA 25 µA 45 µA RESET VOLTAGE THRESHOLD SGM8_L SGM8_M SGM809J/SGM810J SGM8_T SGM8_S SGM8_R SGM8_Z 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 Reset Active Timeout Period 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 TA = 25°C 2.262 TA = - 40°C to +125°C 2.22 VCC = VTH to (VTH –100 mV) TA = 4.38 4.00 3.8 TA = 25°C RESET THRESHOLD Temperature Coefficient VCC to RESET/ RESET Delay 4.63 - 40°C to +85°C 160 TA = - 40°C to +125°C 100 3.08 4.723 V 4.86 V 4.468 V 4.56 V 4.08 V 4.2 V 3.157 V 3.23 V 2.93 3.003 V 3.08 V 2.63 2.696 V 2.76 V 2.378 V 2.42 V 2.32 30 ppm/°C 20 µs 240 560 ms 840 ms VCC = VTH(MIN), ISINK = 1.2mA 0.3 V VCC = VTH(MIN), ISINK = 3.2mA 0.4 V VCC > 1.0 V, ISINK = 50µA 0.3 V RESET/ RESET OUTPUT VOLTAGE Low (SGM803R/S/T/Z) Low (SGM809R/S/T/Z) Low (SGM803L/M/J) Low (SGM809L/M/J) Low (SGM803R/S/T/L/M/J/Z) Low (SGM809R/S/T/L/M/J/Z) High (SGM809R/S/T/Z) VCC > VTH(MAX), ISOURCE = 500µA 0.8×VCC V High (SGM809L/M/J) VCC > VTH(MAX), ISOURCE = 800µA VCC– 1.5 V Low (SGM810R/S/T/Z) VCC = VTH(MAX), ISINK = 1.2mA 0.3 V Low (SGM810L/M/J) VCC = VTH(MAX), ISINK = 3.2mA 0.4 V High (SGM810 R/S/T/L/M/J) RESET Open-Drain Output Leakage Current (SGM803) 1.8 V < VCC < VTH(MIN), ISOURCE = 150µA VCC > VTH, reset de-asserted V 0.8×VCC 1 µA Specifications subject to change without notice. ４ SGM803/809/810 TYPICAL PERFORMANCE CHARACTERISTICS Power-Down RESET Delay vs.Temperature Power-Down RESET Delay vs.Temperature 300 250 SGM8_T/S/R/Z VOD = VTH - VCC Power-Down RESET (µS) Power-Down RESET (µS) SGM8_L/M/J 200 VOD = 10mV 150 VOD = 20mV 100 VOD = 200mV VOD = 100mV 50 200 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(℃) SGM809S VCC = 5.5V 25 260 Supply Current (µA) Power-Down RESET (mS) VOD = 200mV VOD = 100mV 50 0 0 258 256 254 252 250 248 20 VCC = 3.6V 15 10 5 0 -50 -30 -10 10 30 50 70 90 110 130 -50 -30 -10 Temperature(℃) 10 30 50 70 90 110 130 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 250 1.006 1.004 1.002 1 0.998 0.996 0.994 0.992 0.99 0.988 400 350 300 250 SGM8_L/M/J 200 150 100 50 SGM8_R/S/T/Z 0 -50 -30 -10 10 30 50 70 90 110 130 1 10 100 1000 RESET Comparator Overdrive, VTH - VCC(mV) Temperature(℃) ５ SGM803/809/810 TYPICAL PERFORMANCE CHARACTERISTICS RESET Output Voltage vs. Supply Voltage Supply Voltage 5VP-P 2V/div RESET Output Voltage SGM809R SGM809S 200ms/div ６ SGM803/809/810 APPLICATION NOTES INTERFACING TO OTHER DEVICES’ OUTPUT BENEFITS OF AN ACCURATE RESET THRESHOLD The SGM803/SGM809/SGM810 series is designed to integrate with as many devices as possible and, therefore, has a standard output dependent on VCC. This enables the parts to be used in both 3 V and 5 V, or any nominal voltage within the minimum and maximum specifications for VCC. This design simplifies interfacing this device to other devices. In other microprocessor supervisory circuits, tolerances in supply voltages lead to an overall increase in reset tolerance levels due to the deterioration of the microprocessor reset circuit’s power supply. The possibility of a malfunction during a power failure is greatly reduced because the SGM803/ SGM809/SGM810 series can operate effectively even when there are large degradations of the supply voltages. Another advantage of the SGM803/ SGM809/SGM810 series is its very accurate internal voltage reference circuit. These benefits combine to produce an exceptionally reliable voltage monitor circuit. ENSURING A VALID RESET OUTPUT DOWN TO VCC = 0 V When VCC falls below 1.0 V, the SGM803/SGM809 RESET no longer sinks current. A high impedance CMOS logic input connected to RESET may, therefore, drift to undetermined logic levels. To eliminate this problem, a 100kΩ resistor should be connected from RESET to ground. INTERFACING TO MICROPROCESSORS WITH MULTIPLE INTERRUPTS VCC In a number of cases, it is necessary to interface many interrupts from different devices (for example, thermal, altitude, and velocity sensors). The SGM803/SGM809/SGM810 can easily be integrated into existing interrupt-handling circuits, as shown in Figure 1, or can be used as a standalone device. VCC SGM809 RESET GND PRIORITY ENCODER 74LS147 4-LINE BCD TO MICROPROCESSOR Figure 2. Ensuring a Valid Reset Output Down to VCC = 0V VCC VCC SGM809 OTHER SENSING DEVICES RESET GND Figure 1. Interfacing to Microprocessors with Multiple Interrupts ７ SGM803/809/810 PACKAGE OUTLINE DIMENSIONS SOT23-3 D θ b 0.20 Symbol L E E1 L 0 e C e1 Min Max Min Max 1.050 1.250 0.041 0.049 A1 0.000 0.100 0.000 0.004 A2 1.050 1.150 0.041 0.045 b 0.300 0.400 0.012 0.016 c 0.100 0.200 0.004 0.008 D 2.820 3.020 0.111 0.119 E 1.500 1.700 0.059 0.067 E1 2.650 2.950 0.104 0.116 A1 e A L A2 Dimensions In Inches A e1 ８ Dimensions In Millimeters 0.950TYP 1.800 2.000 0.700REF 0.037TYP 0.071 0.079 0.028REF L1 0.300 0.600 0.012 0.024 θ 0° 8° 0° 8° SGM803/809/810 REVISION HISTORY Location Page 11/06— Data Sheet changed from REV. A to REV. B Changes to ABSOLUTE MAXIMUM RATINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Shengbang Microelectronics Co, Ltd Unit 3, ChuangYe Plaza No.5, TaiHu Northern Street, YingBin Road Centralized Industrial Park Harbin Development Zone Harbin, HeiLongJiang 150078 P.R. China Tel.: 86-451-84348461 Fax: 86-451-84308461 www.sg-micro.com ９ SGM803/809/810