CAT853, CAT859, CAT863, CAT869 3-Pin Microprocessor Power Supply Supervisors Description The CAT853, CAT863, CAT859, and CAT869 are supervisory circuits that monitor power supplies in digital systems. 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. Industry standard threshold levels are offered to support +3.3 V or 5.0 V systems. The CAT859 and CAT869 feature a RESET push−pull output (active low) for the two pinout options. The CAT853 and CAT863 feature an open drain RESET output (active low). Both require a pull−up resistor on the RESET output. 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. Features http://onsemi.com SOT−23 TB SUFFIX CASE 527AG PIN CONFIGURATION CAT853, CAT859 1 RESET 3 • Precision Monitoring of +3.3 V (−5%, −10%), • • • • • • • VCC 5 V (−10% Power Supplies) Active Low Reset Output Reset Valid down to VCC = 1.0 V 6 mA Power Supply Current Power Supply Transient Immunity Industrial Temperature Range: −40°C to +85°C SOT−23 Package These Devices are Pb−Free and are RoHS Compliant 2 GND CAT863, CAT869 1 RESET 3 GND 2 VCC Applications Computers, Servers, Laptops and Cable Modems Wireless Communications Embedded Control Systems White Goods Power Meters Intelligent Instruments PDAs and Handheld Equipment (Top Views) MARKING DIAGRAM 1 • • • • • • • Table 1. THRESHOLD SUFFIX SELECTOR Nominal Threshold Voltage Threshold Suffix Designation XXX M G XXXMG G = Specific Device Code = Date Code = Pb−Free Package 4.63 V L 4.38 V M 4.20 V F 4.00 V J ORDERING INFORMATION 3.08 V T 2.93 V S See detailed ordering and shipping information in the package dimensions section on page 8 of this data sheet. 2.63 V R 2.40 V C 2.32 V Z © Semiconductor Components Industries, LLC, 2012 May, 2012 − Rev. 10 (*Note: Microdot may be in either location) 1 Publication Order Number: CAT853/D CAT853, CAT859, CAT863, CAT869 Table 2. PIN DESCRIPTION Pin Name RESET Function 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 GND Ground VCC Power supply voltage that is monitored VCC VCC VCC TOLERANCE BIAS + RESET DIGITAL DELAY – VOLTAGE REFERENCE CAT853 CAT863 GND VCC VCC VCC TOLERANCE BIAS + DIGITAL DELAY – VOLTAGE REFERENCE RESET CAT859 CAT869 GND Figure 1. Block Diagrams Table 3. ABSOLUTE MAXIMUM RATINGS Parameters Ratings Units −0.3 to +6.0 V Input Current, VCC 20 mA Output Current, RESET 20 mA Rate of Rise, VCC 100 V/ms Continuous Power Dissipation Derate 4 mW/°C above 70°C (SOT23) 320 mW Operating Temperature Range −40 to +85 °C Storage Temperature Range −65 to +105 °C 300 °C Any pin with respect to ground Lead Soldering Temperature (10 sec) 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. http://onsemi.com 2 CAT853, CAT859, CAT863, CAT869 Table 4. ELECTRICAL CHARACTERISTICS (VCC = Full range, TA = −40°C to +85°C unless otherwise noted. Typical values at TA = +25°C and VCC = 3.3 V for the C, S, T versions, VCC = 5 V for the M version.) Symbol Parameter VCC Range Conditions Min Units V 1.0 5.5 TA = −40°C to +85°C 1.2 5.5 Supply Current TA = −40°C to +85°C VTH Reset Threshold Voltage L Threshold VCC < 3.6 V, C, S, T TA = +25°C 4.56 TA = −40°C to +85°C 4.50 TA = +25°C 4.31 TA = −40°C to +85°C 4.25 TA = +25°C 4.14 TA = −40°C to +85°C 4.08 TA = +25°C 3.93 TA = −40°C to +85°C 3.89 TA = +25°C 3.04 TA = −40°C to +85°C 3.00 TA = +25°C 2.89 TA = −40°C to +85°C 2.85 TA = +25°C 2.59 TA = −40°C to +85°C 2.55 TA = +25°C 2.35 TA = −40°C to +85°C 2.30 TA = +25°C 2.28 TA = −40°C to +85°C 2.25 M Threshold F Threshold J Threshold T Threshold S Threshold R Threshold C Threshold Z Threshold Reset Threshold Tempco VOH Max TA = 0°C to +70°C ICC VOL Typ (Note 1) VCC to Reset Delay VCC = VTH to (VTH − 100 mV) Reset Active Timeout Period TA = −40°C to +85°C RESET Output Voltage Low RESET Output Voltage High VCC = VTH max, ISOURCE = −500 mA (for CAT859/869 only) 140 6 15 mA 4.63 4.70 V 4.75 4.38 4.45 4.50 4.20 4.26 4.31 4.00 4.06 4.10 3.08 3.11 3.15 2.93 2.96 3.00 2.63 2.66 2.70 2.40 2.45 2.50 2.32 2.35 2.38 30 ppm/°C 20 ms 460 ms VCC = VTH min, ISINK = 1.2 mA 0.4 V VCC > 1.0 V, ISINK = 50 mA 0.3 0.8 VCC 1. Production testing done at TA = +25°C; limits over temperature guaranteed by design only. http://onsemi.com 3 240 V CAT853, CAT859, CAT863, CAT869 TYPICAL ELECTRICAL OPERATING CHARACTERISTICS (VCC = Full range, TA = −40°C to +85°C unless otherwise noted. Typical values at TA = +25°C and VCC = 3.3 V for the C, S, T versions, VCC = 5 V for the M 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) 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 (ms) 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 Figure 5. Normalized Reset Threshold vs. Temperature http://onsemi.com 4 120 CAT853, CAT859, CAT863, CAT869 DETAILED DESCRIPTION Reset Timing The reset signal is asserted low for the CAT853, CAT863, CAT859, and CAT869 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 Threshold Voltage 5V 0V Reset Timeout Period 140 ms minimum 5V 0V Figure 6. Reset Timing Diagram VCC Transient Response Valid Reset with VCC under 1.0 V The CAT853, CAT863, CAT859, and CAT869 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 CAT859 and CAT869 RESET pin is in a known state when VCC is under 1.0 V, a > 10 kW pull−down resistor between RESET pin and GND is recommended. Power Supply VCC CAT8x9 30 TRANSIENT DURATION (s) TAMB = 25°C RESET 25 20 GND “C” THRESHOLD 15 Figure 8. RESET Valid with VCC Under 1.0 V 10 “M” THRESHOLD 5 0 10 kW 1 10 100 1000 RESET OVERDRIVE VTH − VCC (mV) Figure 7. Maximum Transient Duration Without Causing a Reset Pulse vs. Reset Comparator Overdrive http://onsemi.com 5 CAT853, CAT859, CAT863, CAT869 Bi−directional Reset Pin Interfacing The CAT859 and CAT869 can interface with mP/mC bi−directional reset pins by connecting a 4.7 kW resistor in series with the CAT859 and CAT869 reset output and the mP/mC bi−directional reset pin. BUF Buffered RESET Power Supply VCC VCC CAT8x9 mP 4.7 kW (For example: 68HC11) RESET INPUT RESET GND GND Bi−directional I/O Pin Figure 9. Bi−directional Reset Pin Interfacing CAT853 and CAT863 Open−Drain RESET Application several outputs together to form an inexpensive logic circuit. It is also possible to have the pull−up resistor connected to a different supply which can be higher than the CAT8x3 VCC pin. The value of the pull−up resistor is not critical in most applications, typical values being between 5 kW and 10 kW. The CAT853 and CAT863 features an open−drain RESET output and therefore need a pull−up resistor on the output for proper operation, as shown on Figure 10. An advantage of the open−drain output includes the ability to “wire AND” Power Supply VCC 5 kW VCC CAT8x3 mP RESET INPUT RESET GND GND Figure 10. Typical CAT8x3 Open−Drain Circuit Configuration http://onsemi.com 6 CAT853, CAT859, CAT863, CAT869 PACKAGE DIMENSIONS SOT−23, 3 Lead CASE 527AG−01 ISSUE O MIN SYMBOL D 3 E1 1 E 2 e e1 A 0.89 1.12 0.013 0.10 b 0.37 0.50 c 0.085 0.18 D 2.80 3.04 E 2.10 2.64 E1 1.20 1.40 e 0.95 BSC e1 1.90 BSC L 0.40 REF 0.54 REF 0º θ A MAX A1 L1 TOP VIEW NOM 8º q b L1 A1 SIDE VIEW L END VIEW Notes: (1) All dimensions are in millimeters. Angles in degrees. (2) Complies with JEDEC TO-236. http://onsemi.com 7 c CAT853, CAT859, CAT863, CAT869 ORDERING INFORMATION Reset Package Quantity per Reel (Note 3) LOW SOT−23−3 3,000 LOW SOT−23−3 3,000 LOW SOT−23−3 3,000 LOW SOT−23−3 3,000 Top Mark (Note 2) Order Number NiPdAu Matte−Tin Voltage NiPdAu Matte−Tin CAT853LTBI−GT3 CAT853LTBI−T3 4.63 V VPA VPR CAT853MTBI−GT3 CAT853MTBI−T3 4.38 V VPA VPR CAT853FTBI−GT3 CAT853FTBI−T3 4.20 V VPA VPR CAT853JTBI−GT3 CAT853JTBI−T3 4.00 V VPA VPR CAT853TTBI−GT3 CAT853TTBI−T3 3.08 V VPA VPR CAT853STBI−GT3 CAT853STBI−T3 2.93 V VPA VPR CAT853RTBI−GT3 CAT853RTBI−T3 2.63 V VPA VPR CAT853CTBI−GT3 CAT853CTBI−T3 2.40 V VPA VPR CAT853ZTBI−GT3 CAT853ZTBI−T3 2.32 V VPA VPR CAT859LTBI−GT3 CAT859LTBI−T3 4.63 V VNA VNR CAT859MTBI−GT3 CAT859MTBI−T3 4.38 V VNA VNR CAT859FTBI−GT3 CAT859FTBI−T3 4.20 V VNA VNR CAT859JTBI−GT3 CAT859JTBI−T3 4.00 V VNA VNR CAT859TTBI−GT3 CAT859TTBI−T3 3.08 V VNA VNR CAT859STBI−GT3 CAT859STBI−T3 2.93 V VNA VNR CAT859RTBI−GT3 CAT859RTBI−T3 2.63 V VNA VNR CAT859CTBI−GT3 CAT859CTBI−T3 2.40 V VNA VNR CAT859ZTBI−GT3 CAT859ZTBI−T3 2.32 V VNA VNR CAT863LTBI−GT3 CAT863LTBI−T3 4.63 V VNB VNK CAT863MTBI−GT3 CAT863MTBI−T3 4.38 V VNB VNK CAT863FTBI−GT3 CAT863FTBI−T3 4.20 V VNB VNK CAT863JTBI−GT3 CAT863JTBI−T3 4.00 V VNB VNK CAT863TTBI−GT3 CAT863TTBI−T3 3.08 V VNB VNK CAT863STBI−GT3 CAT863STBI−T3 2.93 V VNB VNK CAT863RTBI−GT3 CAT863RTBI−T3 2.63 V VNB VNK CAT863CTBI−GT3 CAT863CTBI−T3 2.40 V VNB VNK CAT863ZTBI−GT3 CAT863ZTBI−T3 2.32 V VNB VNK CAT869LTBI−GT3 CAT869LTBI−T3 4.63 V VNC VNJ CAT869MTBI−GT3 CAT869MTBI−T3 4.38 V VNC VNJ CAT869FTBI−GT3 CAT869FTBI−T3 4.20 V VNC VNJ CAT869JTBI−GT3 CAT869JTBI−T3 4.00 V VNC VNJ CAT869TTBI−GT3 CAT869TTBI−T3 3.08 V VNC VNJ CAT869STBI−GT3 CAT869STBI−T3 2.93 V VNC VNJ CAT869RTBI−GT3 CAT869RTBI−T3 2.63 V VNC VNJ CAT869CTBI−GT3 CAT869CTBI−T3 2.40 V VNC VNJ CAT869ZTBI−GT3 CAT869ZTBI−T3 2.32 V VNC VNJ 2. Threshold and full part numbers will be provided on box and reel labels as well as all Shipping documents. 3. 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. 4. 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 http://onsemi.com 8 CAT853, CAT859, CAT863, CAT869 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. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. “Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights nor the rights of others. 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