SP809 / SP810 3 Pin Microprocessor Supervisor Circuit FEATURES ■ Ultra Low Supply Current 1µA (typ.) ■ Guaranteed Reset valid to VCC = 0.9V ■ 140 ms Min. Power-On Reset Pulse Width ■ Internally Fixed Threshold 2.3V, 2.6V, 2.9V, 3.1V, 4.0V, 4.4V, 4.6V ■ Tight Voltage Threshold Tolerance: 1.5% ■ Offered in a 3 Pin SOT-23 Package Part Number Output Type SP809N Open-Drain Active Low SP809 Push-Pull Active Low SP810 Push-Pull Active High VCC SP809 3 Pin SOT-23 GND RESET Now Available in Lead Free Packaging APPLICATIONS ■ Portable Electronic Devices ■ Electrical Power Meter ■ Digital Still Camera ■ µP Power Monitoring DESCRIPTION The SP809/SP810 are low power microprocessor (µP) supervisory circuits used to monitor power supplies in µP and digital systems. They provide applications with benefits of circuit reliability and low cost by eliminating external components. If the VCC supply voltage falls below preset threshold then a reset signal is asserted for at least 140ms after VCC has risen above the reset threshold. Both the SP809 and SP810 were designed with a reset comparator to help identify invalid signals, which last less than 140ms. The only difference between them is that they have an active-low RESET output and active-high RESET output, respectively. Low supply current (1µA) makes SP809/SP810 ideal for portable equipment. The devices are available in 3 pin SOT-23 package. TYPICAL APPLICATION CIRCUIT VCC VCC VCC µP RESET RESET (RESET) GND GND Push-Pull output Date: 5/02/06 Rev B SP809/810, 3 Pin Microprocessor Supervisor Circuit 1 © Copyright 2006 Sipex Corporation ABSOLUTE MAXIMUM RATINGS Storage Temperature .................................................. -65°C to +150°C VCC .................................................................................... -0.3V to 6.5V RESET, RESET ......................................................... -0.3 to VCC+ 0.3V Input Current (VCC) ....................................................................... 20mA Output Current (RESET, RESET).................................................. 20mA Continuous Power Dissipation (TA = +70ºC) ............................. 320mW Operating Junction Temperature ................................... -40°C to +85°C Junction Temperature.....................................................................125°C These are stress ratings only and functional operation of the device at these ratings or any other above those indicated in the operation sections of the specifications below is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability. ELECTRICAL CHARACTERISTICS Typical values are at TA = 25°C, unless otherwise specified. (Note 1) Parameter Symbol Min. Operating Voltage Range VCC 0.9 Supply Current ICC 2.265 Typ. M ax . Un i t s 6.0 V 1.0 3.0 µA 2.3 2.335 Conditions VCC = VTH + 0.1V SP809-23 2.254 2.561 2.346 2.6 TA = -40ºC to + 85ºC 2.639 SP809-26 2.548 2.857 2.944 SP809-29 2.842 Reset Threshold V TH 3.054 2.958 3.1 3.147 3.038 3.940 V SP809-31 SP809-40 4.334 4.080 4.4 SP809-44 4.531 4.488 4.6 SP809-46 VCC Reset Delay VTRIP Reset Active Timeout Period TRP RESET Output Voltage 140 V OH 4.692 20 230 ______ RESET Output Voltage Date: 5/02/06 Rev B VOH µS VCC = VTH to (VTH - 0.1V), VTH = 3.1V ms VCC = VTH(MAX) 1030 0.8VCC V VOL 0.3 0.8VCC 0.3 SP809/810, 3 Pin Microprocessor Supervisor Circuit 2 TA = +25ºC TA = -40ºC to + 85ºC VCC = VTH - 0.1V, ISOURCE = 1.2mA VCC = VTH + 0.1V, ISINK = 1.2mA V VOL TA = +25ºC TA = -40ºC to + 85ºC 560 100 TA = +25ºC TA = -40ºC to + 85ºC 4.669 4.508 TA = +25ºC TA = -40ºC to + 85ºC 4.466 4.312 TA = +25ºC TA = -40ºC to + 85ºC 4.060 3.920 TA = +25ºC TA = -40ºC to + 85ºC 3.162 4.0 TA = +25ºC TA = -40ºC to + 85ºC 2.652 2.9 TA = +25ºC VCC = VTH + 0.1V, ISOURCE = 1.2mA VCC = VTH - 0.1V, ISINK = 1.2mA © Copyright 2006 Sipex Corporation ELECTRICAL CHARACTERISTICS Note 1. Specifications are production tested at TA = 25°C. Specifications over the -40°C to 85°C operating temperature range are assured by design, characterization and correlation with Statistical Quality Controls Note 2. RESET output is for SP809; RESET output is for SP810. BLOCK DIAGRAMS VCC R1 Reset Bandgap Reset Generator NMOS R2 GND N-ch Open-Drain Type VCC R1 Bandgap Reset Generator Reset (Reset) R2 GND Push-Pull Type TEST CIRCUIT VCC Date: 5/02/06 Rev B SP809 RESET GND SP809/810, 3 Pin Microprocessor Supervisor Circuit 3 © Copyright 2006 Sipex Corporation TYPICAL PERFORMANCE CHARACTERISTICS 1.5 120 1.4 110 1.3 VOD = 50mV 90 Power-Down Reset Delay (µS) 1.2 Supply Current (µA) V TH = 2.3V V OD = VTH - VCC 100 VTH = 2.3V VTH = 3.1V 1.1 1.0 VTH = 4.6V 0.9 0.8 80 70 60 50 VOD = 100mV 40 30 0.7 20 VOD = 200mV 10 0.6 0 0.5 -40 -20 0 20 40 60 80 -60 100 -40 -20 0 20 40 60 80 100 Temperature (°C) Temperature (ºC) Figure 1. Supply Current vs. Temperature Figure 2. Power-Down Reset Delay vs. Temperature 240 400 VTH = 3.1V VOD = VTH - VCC 220 V TH = 4.6V V OD = VTH - VCC VOD = 50mV 200 VOD = 50mV 300 Power-Down Reset Delay (µS) Power-Down Reset Delay (µS) 180 160 140 120 100 80 VOD = 100mV 60 200 VOD = 100mV 100 40 VOD = 200mV 20 VOD = 200mV 0 0 -60 -40 -20 0 20 40 60 80 100 -60 -40 -20 0 Temperature (°C) 20 40 60 80 100 Temperature (ºC) Figure 4. Power-Down Reset Delay vs. Temperature Figure 3. Power-Down Reset Delay vs. Temperature 600 1.015 V TH = 4.6V 500 VTH = 4.6V Power-Up Reset Timeout (ms) Normalized Reset Threshold (V) 1.010 VTH = 3.1V 1.005 VTH = 2.3V 1.000 0.995 VTH = 3.1V 400 VTH = 2.3V 300 200 0.990 100 0.985 -40 -20 0 20 40 60 80 100 0 Temperature (ºC) -60 -40 -20 0 20 40 60 80 100 Temperature (°C) Figure 6. Power-Up Reset Time-out vs. Temperature Figure 5. Normalized Reset Threshold vs. Temperature Date: 5/02/06 Rev B SP809/810, 3 Pin Microprocessor Supervisor Circuit 4 © Copyright 2006 Sipex Corporation PIN DESCRIPTION Pin Name GN D Description Ground. RESET (SP809) Active low output pin. RESET Output remains low while VCC is below the reset threshold. RESET (SP810) Active high output pin. RESET Output remains high while VCC is below the reset threshold. VCC Supply Voltage DETAILED DESCRIPTION Benefits of Highly Accurate Reset Threshold µP will be activated at a valid reset state. These µP supervisory circuits assert reset to prevent code execution errors during powerup, power-down, or brownout conditions. SP809/810 with specified voltage as 5V±10% or 3V±10% are ideal for systems using a 5V±5% or 3V±5% power supply. The reset is guaranteed to assert after the power supply falls below the minimum specified operating voltage range of the system ICs. The pretrimmed thresholds are reducing the range over which an undesirable reset may occur. Reset is guaranteed to be a logic low for VTH>VCC>0.9V. Once VCC exceeded the reset threshold, an internal timer keeps RESET low for the reset timeout period; after this interval, RESET goes high. If a brownout condition occurs (VCC drops below the reset threshold), RESET goes low. Any time VCC goes below the reset threshold, the internal timer resets to zero, and RESET goes low. The internal timer is activated after VCC returns above the reset threshold, and RESET remains low for the reset timeout period. APPLICATION INFORMATION Negative-Going VCC Transients However in applications where RESET must be valid down to 0V, adding a pulldown resistor to RESET causes any leakage currents to flow to ground, holding RESET low. In addition to issuing a reset to the µP during power-up, power-down, and brownout conditions, SP809 series are relatively resistant to short-duration negative-going VCC transient. Interfacing to µP with Bidirectional Reset Pins The RESET output on the SP809N is open drain, this device interfaces easily with µPs that have bidirectional reset pins. Connecting the µP supervisor's RESET output directly to the microcontroller's RESET pin with a single pull-up resistor allows either device to assert reset. Ensuring a Valid Reset Output Down to VCC= 0 When VCC falls below 0.9V, SP809 RESET output no longer sinks current; it becomes an open circuit. In this case, high-impedance CMOS logic inputs connecting to RESET can drift to undetermined voltages. Therefore, SP809/810 with CMOS is perfect for most applications of VCC down to 0.9V. Date: 5/02/06 Rev B SP809/810, 3 Pin Microprocessor Supervisor Circuit 5 © Copyright 2006 Sipex Corporation PACKAGE: 3 PIN SOT-23 D b SIDE VIEW 3 E1 A2 A E Seating Plane A1 1 (L1) 2 e e1 TOP VIEW FRONT VIEW Gauge Plane L2 ø L 3 Pin SOT-23 SYMBOL b c D E E1 e e1 L L1 L2 Ø A A1 A2 Date: 5/02/06 Rev B c Seating Plane JEDEC TO-236 Variation AB Dimensions in Inches Conversion Factor: 1 Inch = 25.40 mm Dimensions in Millimeters: Controlling Dimension MIN 0.30 0.08 2.80 2.10 1.20 0.40 0º 0.89 0.01 0.88 SIPEX Pkg NOM MAX 0.50 0.20 2.90 3.04 2.64 1.30 1.40 0.95 BSC 1.90 BSC 0.50 0.60 0.54 REF 0.25 BSC 8º 1.12 0.10 0.95 1.02 Signoff Date/Rev: MIN 0.012 0.003 0.110 0.083 0.047 0.016 0º 0.035 0.000 0.035 MAX 0.020 0.008 0.120 0.104 0.055 0.024 8º 0.044 0.004 0.040 JL Oct25-05 / Rev A SP809/810, 3 Pin Microprocessor Supervisor Circuit 6 NOM 0.114 0.051 0.038 BSC 0.075 BSC 0.020 0.021 REF 0.010 BSC 0.037 © Copyright 2006 Sipex Corporation ORDERING INFORMATION Part Number Top Mark Temperature Range Package Type SP809EK-2-3 ......................... N4WW..................-40°C to 85°C .......................... 3 Pin SOT-23 SP809EK-2-3/TR ................... N4WW..................-40°C to 85°C .......................... 3 Pin SOT-23 SP809EK-2-6 ......................... P4WW..................-40°C to 85°C .......................... 3 Pin SOT-23 SP809EK-2-6/TR ................... P4WW..................-40°C to 85°C .......................... 3 Pin SOT-23 SP809EK-2-9 ......................... Q4WW..................-40°C to 85°C .......................... 3 Pin SOT-23 SP809EK-2-9/TR ................... Q4WW..................-40°C to 85°C .......................... 3 Pin SOT-23 SP809EK-3-1 ......................... R4WW..................-40°C to 85°C .......................... 3 Pin SOT-23 SP809EK-3-1/TR ................... R4WW..................-40°C to 85°C .......................... 3 Pin SOT-23 SP809EK-4-0 ......................... S4WW..................-40°C to 85°C .......................... 3 Pin SOT-23 SP809EK-4-0/TR ................... S4WW..................-40°C to 85°C .......................... 3 Pin SOT-23 SP809EK-4-4 ......................... T4WW..................-40°C to 85°C .......................... 3 Pin SOT-23 SP809EK-4-4/TR ................... T4WW..................-40°C to 85°C .......................... 3 Pin SOT-23 SP809EK-4-6 ......................... U4WW..................-40°C to 85°C .......................... 3 Pin SOT-23 SP809EK-4-6/TR ................... U4WW..................-40°C to 85°C .......................... 3 Pin SOT-23 SP809NEK-2-3 ...................... V4WW..................-40°C to 85°C .......................... 3 Pin SOT-23 SP809NEK-2-3/TR ................ V4WW..................-40°C to 85°C .......................... 3 Pin SOT-23 SP809NEK-2-6 ..................... W4WW..................-40°C to 85°C .......................... 3 Pin SOT-23 SP809NEK-2-6/TR ............... W4WW..................-40°C to 85°C .......................... 3 Pin SOT-23 SP809NEK-2-9 ...................... X4WW..................-40°C to 85°C .......................... 3 Pin SOT-23 SP809NEK-2-9/TR ................ X4WW..................-40°C to 85°C .......................... 3 Pin SOT-23 SP809NEK-3-1 ...................... Y4WW..................-40°C to 85°C .......................... 3 Pin SOT-23 SP809NEK-3-1/TR ................ Y4WW..................-40°C to 85°C .......................... 3 Pin SOT-23 SP809NEK-4-0 ...................... A5WW..................-40°C to 85°C .......................... 3 Pin SOT-23 SP809NEK-4-0/TR ................ A5WW..................-40°C to 85°C .......................... 3 Pin SOT-23 SP809NEK-4-4 ...................... B5WW..................-40°C to 85°C .......................... 3 Pin SOT-23 SP809NEK-4-4/TR ................ B5WW..................-40°C to 85°C .......................... 3 Pin SOT-23 SP809NEK-4-6 ...................... C5WW..................-40°C to 85°C .......................... 3 Pin SOT-23 SP809NEK-4-6/TR ................ C5WW..................-40°C to 85°C .......................... 3 Pin SOT-23 Available in lead free packaging. To order add "-L" suffix to part number. Example: SP809EK-2-3/TR = standard; SP809EK-L-2-3/TR = lead free /TR = Tape and Reel Pack quantity is 2,500 for SOT-23. Sipex Corporation Solved By Sipex TM Headquarters and Sales Office 233 South Hillview Drive Milpitas, CA 95035 TEL: (408) 934-7500 FAX: (408) 935-7600 Sipex Corporation reserves the right to make changes to any products described herein. Sipex does not assume any liability arising out of the application or use of any product or circuit described herein; neither does it convey any license under its patent rights nor the rights of others. Date: 5/02/06 Rev B SP809/810, 3 Pin Microprocessor Supervisor Circuit 7 © Copyright 2006 Sipex Corporation ORDERING INFORMATION Part Number Top Mark Temperature Range Package Type SP810EK-2-3 ......................... D5WW..................-40°C to 85°C .......................... 3 Pin SOT-23 SP810EK-2-3/TR ................... D5WW..................-40°C to 85°C .......................... 3 Pin SOT-23 SP810EK-2-6 ......................... E5WW..................-40°C to 85°C .......................... 3 Pin SOT-23 SP810EK-2-6/TR ................... E5WW..................-40°C to 85°C .......................... 3 Pin SOT-23 SP810EK-2-9 ......................... F5WW..................-40°C to 85°C .......................... 3 Pin SOT-23 SP810EK-2-9/TR ................... F5WW..................-40°C to 85°C .......................... 3 Pin SOT-23 SP810EK-3-1 ......................... G5WW..................-40°C to 85°C .......................... 3 Pin SOT-23 SP810EK-3-1/TR ................... G5WW..................-40°C to 85°C .......................... 3 Pin SOT-23 SP810EK-4-0 ......................... H5WW..................-40°C to 85°C .......................... 3 Pin SOT-23 SP810EK-4-0/TR ................... H5WW..................-40°C to 85°C .......................... 3 Pin SOT-23 SP810EK-4-4 ......................... J5WW..................-40°C to 85°C .......................... 3 Pin SOT-23 SP810EK-4-4/TR ................... J5WW..................-40°C to 85°C .......................... 3 Pin SOT-23 SP810EK-4-6 ......................... K5WW..................-40°C to 85°C .......................... 3 Pin SOT-23 SP810EK-4-6/TR ................... K5WW..................-40°C to 85°C .......................... 3 Pin SOT-23 Available in lead free packaging. To order add "-L" suffix to part number. Example: SP810EK-2-3/TR = standard; SP810EK-L-2-3/TR = lead free /TR = Tape and Reel Pack quantity is 2,500 for SOT-23. Sipex Corporation Solved By Sipex TM Headquarters and Sales Office 233 South Hillview Drive Milpitas, CA 95035 TEL: (408) 934-7500 FAX: (408) 935-7600 Sipex Corporation reserves the right to make changes to any products described herein. Sipex does not assume any liability arising out of the application or use of any product or circuit described herein; neither does it convey any license under its patent rights nor the rights of others. Date: 5/02/06 Rev B SP809/810, 3 Pin Microprocessor Supervisor Circuit 8 © Copyright 2006 Sipex Corporation