CAT811, CAT812 4-Pin Microprocessor Power Supply Supervisors with Manual Reset Description The CAT811 and CAT812 are microprocessor supervisory circuits that monitor power supplies. The CAT811 and CAT812 are direct replacements for the MAX811 and MAX812 in applications operating over the industrial temperature range; both have a manual reset input. These devices generate a reset signal, which is asserted while the power supply voltage is below a preset threshold level and for at least 140 ms after the power supply level has risen above that level. The underlying floating gate technology, AE2 used by ON Semiconductor, makes it possible to offer any custom reset threshold value. Seven industry standard threshold levels are offered to support +5.0 V, +3.3 V, +3.0 V and +2.5 V systems. The CAT811 features a RESET push-pull output (active LOW) and the CAT812 features a RESET push-pull output (active HIGH). Fast transients on the power supply are ignored and the output is guaranteed to be in the correct state at Vcc levels as low as 1.0 V. The CAT811/812 are fully specified over the industrial temperature range (-40C to 85C) and are available in a compact 4-pin SOT-143 package. Features http://onsemi.com SOT-143 BI SUFFIX CASE 527AF PIN CONFIGURATION 1 * * * * * * * * * VCC GND 2 3 MR RESET * Precision Monitoring of +5.0 V ( 5%, 10%, 20%), +3.3 V ( 5%, 10%), +3.0 V ( 10%) and +2.5 V ( 5%) Power Supplies Manual Reset Input Offered in Two Output Configurations: CAT811: Active LOW Reset CAT812: Active HIGH Reset Direct Replacements for the MAX811 and MAX812 in Applications Operating over the Industrial Temperature Range Reset Valid down to VCC = 1.0 V 6 mA Power Supply Current Power Supply Transient Immunity Available in SOT-143 Packages with Sn or NiPdAu Green Lead Finishes Industrial Temperature Range: -40C to +85C These Devices are Pb-Free, Halogen Free/BFR Free and are RoHS Compliant 4 (Top View) MARKING DIAGRAM XXXMG G 1 XXX M G = Specific Device Code = Month Code = Pb-Free Package (*Note: Microdot may be in either location) ORDERING INFORMATION See detailed ordering and shipping information in the package dimensions section on page 9 of this data sheet. Applications * * * * * * Computers, Servers, Laptops and Cable Modems Wireless Communications Embedded Control Systems White Goods, Power Meters Intelligent Instruments PDAs and Handheld Equipment (c) Semiconductor Components Industries, LLC, 2012 May, 2012 - Rev. 1 1 Publication Order Number: CAT811/D CAT811, CAT812 Table 1. THRESHOLD SUFFIX SELECTOR DESCRIPTION Nominal Threshold Voltage Threshold Suffix Designation 4.63 V L 4.38 V M 4.00 V J 3.08 V T 2.93 V S 2.63 V R 2.32 V Z Table 2. PIN DESCRIPTION Pin Number CAT811 CAT812 1 1 GND 2 - RESET Active LOW reset. RESET is asserted if VCC falls below the reset threshold and remains low for at least 140 ms after VCC rises above the reset threshold. - 2 RESET Active HIGH reset. RESET is asserted if VCC falls below the reset threshold and remains high for at least 140 ms after VCC rises above the reset threshold. 3 3 MR Manual Reset Input. A logic LOW on MR asserts RESET. RESET remains active as long as MR is LOW and for 140 ms after MR returns HIGH. The active low input has an internal 20 kW pull-up resistor. The input should be left open if not used. 4 4 VCC Power supply voltage that is monitored. Pin Name Description Ground. VCC MR VCC VCC TOLERANCE BIAS RESET & DIGITAL DELAY + - RESET VOLTAGE REFERENCE CAT811 GND VCC MR VCC VCC TOLERANCE BIAS RESET & DIGITAL DELAY + - RESET VOLTAGE REFERENCE CAT812 GND Figure 1. Block Diagrams http://onsemi.com 2 CAT811, CAT812 Table 3. ABSOLUTE MAXIMUM RATINGS Parameters Ratings Units -0.3 to +6.0 V Input Current, VCC 20 mA Output Current RESET, RESET 20 mA Rate of Raise, VCC 100 V/ms Continuous Power Dissipations Derate 4 mW/C above +70C (SOT-143) 320 mW Storage Temperature Range -65 to +105 C Operating Ambient Temperature Range -40 to +85 C +300 C Any pin with respect to ground Lead Soldering Temperature (10 seconds) Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability. Table 4. ELECTRICAL OPERATING CHARACTERISTICS (VCC = Full range, TA = -40C to +85C unless otherwise noted. Typical values at TA = +25C and VCC = 5 V for the L/M/J versions, VCC = 3.3 V for the T/S versions, VCC = 3 V for the R version and VCC = 2.5 V for the Z version.) Parameter Symbol VCC Range Supply Current Reset Threshold Voltage ICC VTH Conditions Min TA = 0C to +70C TA = -40C to +85C TA = -40C to +85C Typ Max Units 1.0 5.5 V 1.2 5.5 VCC < 5.5 V, J/L/M 8 20 VCC < 3.6 V, R/S/T/Z 6 15 4.63 4.70 L Threshold TA = +25C 4.56 TA = -40C to +85C 4.50 TA = +25C 4.31 TA = -40C to +85C 4.25 TA = +25C 3.93 TA = -40C to +85C 3.89 TA = +25C 3.04 TA = -40C to +85C 3.00 TA = +25C 2.89 TA = -40C to +85C 2.85 TA = +25C 2.59 TA = -40C to +85C 2.55 TA = +25C 2.28 TA = -40C to +85C 2.25 M Threshold J Threshold T Threshold S Threshold R Threshold Z Threshold Reset Threshold Tempco VCC to Reset Delay (Note 3) VCC = VTH to (VTH - 100 mV) Reset Active Timeout Period TA = -40C to +85C 1. Production testing done at TA = +25C; limits over temperature guaranteed by design only. 2. Glitches of 100 ns or less typically will not generate a reset pulse. 3. RESET output for the CAT811; RESET output for the CAT812. http://onsemi.com 3 140 mA V 4.75 4.38 4.45 4.50 4.00 4.06 4.10 3.08 3.11 3.15 2.93 2.96 3.00 2.63 2.66 2.70 2.32 2.35 2.38 30 ppm/C 20 ms 240 400 ms CAT811, CAT812 Table 4. ELECTRICAL OPERATING CHARACTERISTICS (VCC = Full range, TA = -40C to +85C unless otherwise noted. Typical values at TA = +25C and VCC = 5 V for the L/M/J versions, VCC = 3.3 V for the T/S versions, VCC = 3 V for the R version and VCC = 2.5 V for the Z version.) Parameter Symbol Conditions RESET Output Voltage Low (Push-pull, active LOW, CAT811) VOL RESET Output Voltage High (Push-pull, active LOW, CAT811) VOH RESET Output Voltage Low (Push-pull, active HIGH, CAT812) VOL RESET Output Voltage High (Push-pull active HIGH, CAT812) VOH MR Minimum Pulse Width tMR MR Glitch Immunity Min Typ Max Units VCC = VTH min, ISINK = 1.2 mA CAT811R/S/T/Z 0.3 V VCC = VTH min, ISINK = 3.2 mA CAT811J/L/M 0.4 VCC > 1.0 V, ISINK = 50 mA 0.3 VCC = VTH max, ISOURCE = 500 mA CAT811R/S/T/Z 0.8VCC V VCC = VTH max, ISOURCE = 800 mA CAT811J/L/M VCC - 1.5 V VCC > VTH max, ISINK = 1.2 mA CAT812R/S/T/Z 0.3 VCC > VTH max, ISINK = 3.2 mA CAT812J/L/M 0.4 1.8 V < VCC VTH min, ISOURCE = 150 mA 0.8VCC V 10 ms (Note 2) 100 ns 0.5 ms MR to RESET Propagation Delay tMD (Note 3) MR Input Threshold VIH VCC > VTH (MAX), CAT811/812L/M/J V 2.3V VIL VIH V 0.8 VCC > VIH (MAX), CAT811/812R/S/T/Z 0.7VCC VIL 0.25VCC MR Pull-up Resistance 10 1. Production testing done at TA = +25C; limits over temperature guaranteed by design only. 2. Glitches of 100 ns or less typically will not generate a reset pulse. 3. RESET output for the CAT811; RESET output for the CAT812. http://onsemi.com 4 20 75 kW CAT811, CAT812 TYPICAL OPERATING CHARACTERISTICS (VCC = Full range, TA = -40C to +85C unless otherwise noted. Typical values at TA = +25C and VCC = 5 V for the L/M/J versions, VCC = 3.3 V for the T/S versions, VCC = 3 V for the R version and VCC = 2.5 V for the Z version.) 12 SUPPLY CURRENT (mA) 240 VCC = 5 V 220 VCC = 2.5 V 200 180 160 -50 0 50 100 10 VCC = 5.5 V 8 4 2 0 50 100 150 TEMPERATURE (C) TEMPERATURE (C) Figure 2. Power-Up Reset Timeout vs. Temperature Figure 3. Supply Current vs. Temperature (No Load, CAT8xxR/S/T/Z) 14 1.0002 12 1.0000 10 8 6 4 2 0 -50 VCC = 3.6 V 6 0 -50 150 NORMALIZED THRESHOLD POWER-DOWN RESET DELAY (s) POWER-UP RESET TIMEOUT (ms) 260 0 50 100 0.9998 0.9996 0.9994 0.9992 0.9990 0.9988 150 0 20 40 60 80 100 TEMPERATURE (C) TEMPERATURE (C) Figure 4. Power-Down Reset Delay vs. Temperature (CAT8xxR/S/T/Z) Figure 5. Normalized Reset Threshold vs. Temperature http://onsemi.com 5 120 CAT811, CAT812 DETAILED DESCRIPTION Reset Timing The reset signal is asserted LOW for the CAT811 and HIGH for the CAT812 when the power supply voltage falls below the threshold trip voltage and remains asserted for at least 140 ms after the power supply voltage has risen above the threshold. Power Supply Voltage RESET RESET Threshold Voltage 5V 0V Reset Timeout Period 140 ms minimum 5V CAT811 0V 5V CAT812 0V Figure 6. Reset Timing Diagram VCC Transient Response Valid Reset with VCC under 1.0 V The CAT811/812 protect mPs against brownout failure. Short duration transients of 4 ms or less and 100 mV amplitude typically do not cause a false RESET. Figure 7 shows the maximum pulse duration of negative-going VCC transients that do not cause a reset condition. As the amplitude of the transient goes further below the threshold (increasing VTH - VCC), the maximum pulse duration decreases. In this test, the VCC starts from an initial voltage of 0.5 V above the threshold and drops below it by the amplitude of the overdrive voltage (VTH - VCC). To ensure that the CAT811 RESET pin is in a known state when VCC is under 1.0 V, a 100 kW pull-down resistor between RESET pin and GND is recommended; the value is not critical. For the CAT812, a pull-up resistor from RESET pin to VCC is needed. Power Supply VCC CAT811 30 TRANSIENT DURATION (ms) TAMB = 25C MR RESET 25 GND 100 kW 20 CAT8xxZ 15 Figure 8. RESET Valid with VCC Under 1.0 V CAT8xxM 10 5 0 1 10 100 Power Supply 1000 VCC RESET OVERDRIVE VTH - VCC (mV) CAT812 Figure 7. Maximum Transient Duration without Causing a Reset Pulse vs. Reset Comparator Overdrive MR 100 kW RESET GND Figure 9. RESET Valid with VCC Under 1.1 V http://onsemi.com 6 CAT811, CAT812 Bi-directional Reset Pin Interfacing The CAT811/812 can interface with mP/mC bi-directional reset pins by connecting a 4.7 kW resistor in series with the CAT811/812 reset output and the mP/mC bi-directional reset pin. BUF Buffered RESET Power Supply CAT811 VCC mP 4.7 kW MR RESET (for example: 68HC11) RESET INPUT C AT8 11 GND GND Bi-directional I/O Pin Figure 10. Bi-directional Reset Pin Interfacing Table 5. OTHER SUPERVISORY PRODUCTS Function CAT1161/3 CAT1162 With 16k Bit Serial EEPROM Memory a a Watchdog Timer a Manual Reset Input a CAT809 a a Active Low Reset Package CAT811 CAT812 a a a a Active High Reset Dual Polarity Reset Outputs CAT810 a a 8-pin DIP and SOIC 8-pin DIP and SOIC 3-pin SOT-23 and SC70 http://onsemi.com 7 3-pin SOT-23 and SC70 a 4-pin SOT-143 4-pin SOT-143 CAT811, CAT812 PACKAGE DIMENSIONS SOT-143, 4 Lead CASE 527AF-01 ISSUE A SYMBOL MIN NOM MAX A 0.80 1.22 D A1 0.05 0.15 e A2 0.75 4 3 E1 1 E 2 e1 TOP VIEW b 0.30 0.50 0.76 0.89 c 0.08 0.20 D 2.80 E 2.10 E1 1.20 2.90 1.30 e 1.92 BSC 0.20 BSC 0.40 0.50 L1 0.54 REF L2 0.25 0 A1 L1 SIDE VIEW END VIEW Notes: (1) All dimensions are in millimeters. Angles in degrees. (2) Complies with JEDEC TO-253. http://onsemi.com 8 0.60 c L b2 1.40 8 q A 3.04 2.64 e1 A2 1.07 b2 L b 0.90 L2 CAT811, CAT812 ORDERING INFORMATION Output Reset Package Quantity per Reel (Note 5) Manual Reset LOW SOT-143-4 3,000 Manual Reset HIGH SOT-143-4 3,000 Top Mark (Note 4) Order Number NiPdAu Matte-Tin Voltage NiPdAu Matte-Tin CAT811LTBI-GT3 CAT811LTBI-T3 4.63 V VEA VES CAT811MTBI-GT3 CAT811MTBI-T3 4.38 V VEA VES CAT811JTBI-GT3 CAT811JTBI-T3 4.00 V VEA VES CAT811TTBI-GT3 CAT811TTBI-T3 3.08 V VEA VES CAT811STBI-GT3 CAT811STBI-T3 2.93 V VEA VES CAT811RTBI-GT3 CAT811RTBI-T3 2.63 V VEA VES CAT811ZTBI-GT3 CAT811ZTBI-T3 2.32 V VEA VES CAT812LTBI-GT3 CAT812LTBI-T3 4.63 V VTA VTS CAT812MTBI-GT3 CAT812MTBI-T3 4.38 V VTA VTS CAT812JTBI-GT3 CAT812JTBI-T3 4.00 V VTA VTS CAT812TTBI-GT3 CAT812TTBI-T3 3.08 V VTA VTS CAT812STBI-GT3 CAT812STBI-T3 2.93 V VTA VTS CAT812RTBI-GT3 CAT812RTBI-T3 2.63 V VTA VTS CAT812ZTBI-GT3 CAT812ZTBI-T3 2.32 V VTA VTS 4. Threshold and full part numbers will be provided on box and reel labels as well as all Shipping documents. 5. For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D. 6. For detailed information and a breakdown of device nomenclature and numbering systems, please see the ON Semiconductor Device Nomenclature document, TND310/D, available at www.onsemi.com ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein. 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