SP809N

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 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 Part Number SP809N SP809 SP810 Output Type Open-Drain Active Low Push-Pull Active Low Push-Pull Active High 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) GND Push-Pull output RESET GND Date: 5/02/06 Rev B SP809/810, 3 Pin Microprocessor Supervisor Circuit © Copyright 2006 Sipex Corporation 1 ABSOLUTE MAXIMUM RATINGS 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 Storage Temperature .................................................. -65°C to +150°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 Operating Voltage Range Supply Current Symbol VCC ICC Min. 0.9 Typ. M ax . 6.0 Un i t s V µA Conditions 1.0 2.265 2.254 2.561 2.548 2.857 2.842 2.9 2.6 2.3 3.0 2.335 VCC = VTH + 0.1V SP809-23 TA = +25ºC TA = -40ºC to + 85ºC SP809-26 TA = +25ºC TA = -40ºC to + 85ºC SP809-29 TA = +25ºC TA = -40ºC to + 85ºC 2.346 2.639 2.652 2.944 2.958 3.1 3.147 3.162 4.0 4.060 SP809-40 4.080 4.4 4.466 SP809-44 4.488 4.6 4.669 SP809-46 4.692 20 µS 560 ms 1030 V 0.3 VCC = VTH(MAX) V SP809-31 Reset Threshold V TH 3.054 3.038 3.940 3.920 4.334 4.312 4.531 4.508 TA = +25ºC TA = -40ºC to + 85ºC TA = +25ºC TA = -40ºC to + 85ºC TA = +25ºC TA = -40ºC to + 85ºC TA = +25ºC TA = -40ºC to + 85ºC VCC Reset Delay Reset Active Timeout Period RESET Output Voltage ______ RESET Output Voltage VTRIP 140 TRP V OH VOL VOH VOL 0.8VCC 100 0.8VCC VCC = VTH to (VTH - 0.1V), VTH = 3.1V TA = +25ºC TA = -40ºC to + 85ºC 230 VCC = VTH - 0.1V, ISOURCE = 1.2mA VCC = VTH + 0.1V, ISINK = 1.2mA V 0.3 VCC = VTH + 0.1V, ISOURCE = 1.2mA VCC = VTH - 0.1V, ISINK = 1.2mA Date: 5/02/06 Rev B SP809/810, 3 Pin Microprocessor Supervisor Circuit © Copyright 2006 Sipex Corporation 2 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 Bandgap Reset Generator R2 GND NMOS Reset N-ch Open-Drain Type VCC R1 Bandgap Reset Generator Reset (Reset) R2 GND Push-Pull Type TEST CIRCUIT VCC SP809 RESET GND Date: 5/02/06 Rev B SP809/810, 3 Pin Microprocessor Supervisor Circuit © Copyright 2006 Sipex Corporation 3 TYPICAL PERFORMANCE CHARACTERISTICS 1.5 120 1.4 1.3 1.2 Power-Down Reset Delay (µS) 110 VTH = 2.3V 100 VOD = 50mV 90 80 70 60 50 40 30 V TH = 2.3V V OD = VTH - VCC Supply Current (µA) 1.1 1.0 0.9 0.8 0.7 0.6 0.5 -40 VTH = 3.1V VTH = 4.6V VOD = 100mV 20 10 0 VOD = 200mV -20 0 20 40 60 80 100 -60 -40 -20 0 20 40 60 80 100 Temperature (ºC) Temperature (°C) Figure 1. Supply Current vs. Temperature 240 220 200 Figure 2. Power-Down Reset Delay vs. Temperature 400 VTH = 3.1V VOD = VTH - VCC VOD = 50mV VOD = 50mV 300 Power-Down Reset Delay (µS) V TH = 4.6V V OD = VTH - VCC 180 Power-Down Reset Delay (µS) 160 140 120 100 80 60 40 20 0 200 VOD = 100mV VOD = 100mV 100 VOD = 200mV VOD = 200mV 0 -60 -40 -20 0 20 40 60 80 100 -60 -40 -20 0 20 Temperature (ºC) 40 60 80 100 Temperature (°C) Figure 3. Power-Down Reset Delay vs. Temperature Figure 4. Power-Down Reset Delay vs. Temperature 600 1.015 V TH = 4.6V 1.010 500 VTH = 4.6V Power-Up Reset Timeout (ms) VTH = 3.1V 400 Normalized Reset Threshold (V) VTH = 3.1V 1.005 VTH = 2.3V 1.000 VTH = 2.3V 300 0.995 200 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 5. Normalized Reset Threshold vs. Temperature Date: 5/02/06 Rev B Figure 6. Power-Up Reset Time-out vs. Temperature © Copyright 2006 Sipex Corporation SP809/810, 3 Pin Microprocessor Supervisor Circuit 4 PIN DESCRIPTION Pin Name GN D RESET (SP809) RESET (SP810) VCC Ground. Active low output pin. RESET Output remains low while VCC is below the reset threshold. Active high output pin. RESET Output remains high while VCC is below the reset threshold. Supply Voltage Description DETAILED DESCRIPTION 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. 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. Negative-Going VCC Transients 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. 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. Benefits of Highly Accurate Reset Threshold 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. APPLICATION INFORMATION 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. 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. Date: 5/02/06 Rev B SP809/810, 3 Pin Microprocessor Supervisor Circuit © Copyright 2006 Sipex Corporation 5 PACKAGE: 3 PIN SOT-23 D b 3 SIDE VIEW E1 E A A2 Seating Plane A1 1 2 (L1) e e1 TOP VIEW FRONT VIEW Gauge Plane L2 ø L Seating Plane c 3 Pin SOT-23 SYMBOL JEDEC TO-236 Variation AB Dimensions in Inches Conversion Factor: 1 Inch = 25.40 mm MIN 0.012 0.003 0.110 0.083 0.047 NOM 0.114 0.051 0.038 BSC 0.075 BSC 0.020 0.021 REF 0.010 BSC 0.037 MAX 0.020 0.008 0.120 0.104 0.055 Dimensions in Millimeters: Controlling Dimension MIN 0.30 0.08 2.80 2.10 1.20 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: b c D E E1 e e1 L L1 L2 Ø A A1 A2 0.40 0.016 0.024 0º 0.89 0.01 0.88 SIPEX Pkg 0º 0.035 0.000 0.035 8º 0.044 0.004 0.040 JL Oct25-05 / Rev A Date: 5/02/06 Rev B SP809/810, 3 Pin Microprocessor Supervisor Circuit © Copyright 2006 Sipex Corporation 6 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 Headquarters and Sales Office 233 South Hillview Drive Milpitas, CA 95035 TEL: (408) 934-7500 FAX: (408) 935-7600 Solved By Sipex TM 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 © Copyright 2006 Sipex Corporation 7 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 Headquarters and Sales Office 233 South Hillview Drive Milpitas, CA 95035 TEL: (408) 934-7500 FAX: (408) 935-7600 Solved By Sipex TM 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 © Copyright 2006 Sipex Corporation 8