CAT853, CAT863 CATCAT859, CAT869 3-Pin Microprocessor Power Supply Supervisors FEATURES DESCRIPTION Precision monitoring of +3.3 V (-5%, -10%), 5 V (-10% Power Supplies) Active low reset output Reset valid down to VCC = 1.0 V 6 µA power supply current Power supply transient immunity Industrial temperature range: -40ºC to +85ºC RoHS-compliant SOT-23 package 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. ¯¯¯¯¯¯ push-pull The CAT859 and CAT869 feature a RESET output (active low) for the two pinout options. APPLICATIONS The CAT853 and CAT863 feature an open drain ¯¯¯¯¯¯ output (active low). Both require a pull-up RESET resistor on the RESET output. Computers Servers Laptops Cable modems Wireless communications Embedded control systems White goods Power meters Intelligent instruments 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. For Ordering Information details, see page 9. PDAs and handheld equipment PIN CONFIGURATION THRESHOLD SUFFIX SELECTOR SOT-23 3-Lead RESET 1 RESET CAT853 CAT859 GND SOT-23 3-Lead 3 1 CAT863 CAT869 VCC VCC 2 3 GND 2 Nominal Threshold Voltage Threshold Suffix Designation 4.38 V M 4.20 V F 3.08 V T 2.93 V S 2.4 V C PIN DESCRIPTION Pin Name ¯¯¯¯¯¯ RESET GND VCC Function ¯¯¯¯¯¯ is asserted if VCC falls below the reset threshold and remains low for at Active low reset. RESET least 140 ms after VCC rises above the reset threshold Ground Power supply voltage that is monitored © 2009 SCILLC. All rights reserved. Characteristics subject to change without notice 1 Doc. No. MD-3026, Rev. G CAT853, CAT863, CAT859, CAT869 BLOCK DIAGRAMS 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 Doc. No. MD-3026, Rev. G 2 © 2009 SCILLC. All rights reserved. Characteristics subject to change without notice CAT853, CAT863, CAT859, CAT869 ABSOLUTE MAXIMUM RATINGS (1) 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/µs Continuous Power Dissipation Derate 4mW/ºC above 70ºC (SOT23) 320 mW Operating Temperature Range -40 to +85 ºC Storage Temperature Range -65 to +105 ºC 300 ºC Any pin with respect to ground Lead Soldering Temperature (10 sec) ELECTRICAL CHARACTERISTICS VCC = Full range, TA = -40ºC to +85ºC unless otherwise noted. Typical values at TA = +25ºC and VCC = 3.3 V for the C, S, T versions, VCC = 5 V for the M version. Symbol Parameter VCC Range ICC Supply Current Min TA = 0ºC to +70ºC 1.0 5.5 TA = -40ºC to +85ºC 1.2 5.5 TA = -40ºC to +85ºC M Threshold F Threshold VTH Reset Threshold Voltage T Threshold S Threshold C Threshold VCC < 3.6 V, C, S, T TA = +25ºC 4.31 TA = -40ºC to +85ºC 4.25 TA = +25ºC 4.14 TA = -40ºC to +85ºC 4.08 TA = +25ºC 3.04 TA = -40ºC to +85ºC 3.00 TA = +25ºC 2.89 TA = -40ºC to +85ºC 2.85 TA = +25ºC 2.35 TA = -40ºC to +85ºC 2.30 Reset Threshold Tempco VCC to Reset Delay VCC = VTH to (VTH - 100 mV) Reset Active Timeout Period TA = -40ºC to +85ºC 140 Typ (2) Conditions Max 6 15 4.38 4.45 V µA 4.50 4.20 4.26 4.31 3.08 3.11 3.15 2.93 V 2.96 3.00 2.40 2.45 2.50 30 ppm/ºC 20 µs 240 460 VOL ¯¯¯¯¯¯ Output RESET Voltage Low VCC = VTH min, ISINK = 1.2 mA 0.4 VCC > 1.0 V, ISINK = 50 µA 0.3 VOH ¯¯¯¯¯¯ Output RESET Voltage High VCC = VTH max, ISOURCE = -500 µA (for CAT859/869 only) 0.8 VCC Units ms V V Notes: (1) Stresses above 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 outside of those listed in the operational sections of this specification is not implied. Exposure to any absolute maximum rating for extended periods may affect device performance and reliability. (2) Production testing done at TA = +25ºC; limits over temperature guaranteed by design only. © 2009 SCILLC. All rights reserved. Characteristics subject to change without notice 3 Doc. No. MD-3026, Rev. G CAT853, CAT863, CAT859, CAT869 TYPICAL ELECTRICAL OPERATING CHARACTERISTICS VCC = Full range, TA = -40ºC to +85ºC unless otherwise noted. Typical values at TA = +25ºC and VCC = 3.3 V for the C, S, T versions, VCC = 5 V for the M version. SUPPLY CURRENT VS. TEMPERATURE (NO LOAD) 260 12 240 SUPPLY CURRENT (µA) POWER-UP RESET TIMEOUT (ms) POWER-UP RESET TIMEOUT VS. TEMPERATURE VCC = 5 V 220 200 VCC = 2.5 V 180 160 10 VCC = 5.5 V 8 6 VCC = 3.6 V 4 2 0 -50 0 50 100 150 -50 0 TEMPERATURE (°C) 150 NORMALIZED RESET THRESHOLD VS. TEMPERATURE 1.0002 14 NORMALIZED THRESHOLD POWER-DOWN RESET DELAY (µs) 100 TEMPERATURE (°C) POWER-DOWN RESET DELAY VS. TEMPERATURE 12 10 8 6 4 2 0 1 0.9998 0.9996 0.9994 0.9992 0.999 0.9988 -50 0 50 100 150 0 TEMPERATURE (°C) Doc. No. MD-3026 Rev. G 50 20 40 60 80 100 120 TEMPERATURE (°C) 4 © 2009 SCILLC. All rights reserved. Characteristics subject to change without notice CAT853, CAT863, CAT859, 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. Threshold Voltage Power 5 V Supply Voltage 0 V RESET Reset Timeout Period 140 ms minimum 5V 0V Figure 1. Reset Timing Diagram VCC TRANSIENT RESPONSE The CAT853, CAT863, CAT859, and CAT869 protect µPs against brownout failure. Short duration transients of 4 µs or less and 100 mV amplitude typically do not cause a false RESET. 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). TRANSIENT DURATION [s] Figure 2 shows the maximum pulse duration of negative-going VCC transients that do not cause a TAMB = 25ºC “C” THRESHOLD “M” THRESHOLD RESET OVERDRIVE V TH - VCC [mV] Figure 2. Maximum Transient Duration Without Causing a Reset Pulse vs. Reset Comparator Overdrive © 2009 SCILLC. All rights reserved. Characteristics subject to change without notice 5 Doc. No. MD-3026, Rev. G CAT853, CAT863, CAT859, CAT869 VALID RESET WITH VCC UNDER 1.0 V ¯¯¯¯¯¯ pin To ensure that the CAT859 and CAT869 RESET is in a known state when VCC is under 1.0 V, a > 10 kΩ ¯¯¯¯¯¯ pin and GND is pull-down resistor between RESET recommended. Power Supply VCC CAT8x9 RESET GND ¯¯¯¯¯¯ Valid with VCC Under 1.0 V Figure 3. RESET BI-DIRECTIONAL RESET PIN INTERFACING The CAT859 and CAT869 can interface with µP/µC bi-directional reset pins by connecting a 4.7 kΩ resistor in series with the CAT859 and CAT869 reset output and the µP/µC bi-directional reset pin. BUF Power Supply Buffered RESET VCC VCC CAT8x9 µP RESET INPUT RESET GND Bi-directional (For example: 68HC11) GND I/O Pin Figure 4. Bi-directional Reset Pin Interfacing Doc. No. MD-3026 Rev. G 6 © 2009 SCILLC. All rights reserved. Characteristics subject to change without notice CAT853, CAT863, CAT859, CAT869 ¯¯¯¯¯¯ CAT853 AND CAT863 OPEN-DRAIN RESET APPLICATION 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 5. An advantage of the open-drain output includes the ability to “wire AND” 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 kΩ and 10 kΩ. Power Supply VCC 5kΩ VCC CAT8x3 µP RESET RESET INPUT GND GND Figure 5. Typical CAT8x3 Open-Drain Circuit Configuration © 2009 SCILLC. All rights reserved. Characteristics subject to change without notice 7 Doc. No. MD-3026, Rev. G CAT853, CAT863, CAT859, CAT869 PACKAGE OUTLINE DRAWING SOT-23 3-LEAD (TB) (1)(2) SYMBOL D 3 E1 1 E 2 e MIN NOM MAX A 0.89 1.12 A1 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 0.400 REF e1 L1 0.540 REF TOP VIEW θ A 0º 8º θ b L1 A1 SIDE VIEW L c END VIEW Notes: (1) All dimensions in millimeters. Angles in degrees. (2) Complies with JEDEC standard TO-236. Doc. No. MD-3026 Rev. G 8 © 2009 SCILLC. All rights reserved. Characteristics subject to change without notice CAT853, CAT863, CAT859, CAT869 EXAMPLE OF ORDERING INFORMATION Prefix Device # CAT (1) (2) (3) Suffix 859 S Company ID Device Type 853: Open Drain / Active Low Output 863: Open Drain / Active Low Output 859: Push-Pull / Active Low Output 869: Push-Pull / Active Low Output TB Threshold Level M: 4.38 V F: 4.20 V T: 3.08 V S: 2.93 V C: 2.40 V I -G T10 Lead Finish G:NiPdAu Temperature Range I = Industrial (-40ºC to 85ºC) Tape & Reel T: Tape & Reel 3: 3,000/Reel 10: 10,000/Reel Package TB: SOT-23 (1) TOP MARKING Part and Threshold CAT859C CAT859T CAT859S CAT859F CAT859M CAT869T CAT869S CAT869M SOT-23 RoHS (4) (5) NiPdAu Finish Part and Threshold CAT853C CAT853T CAT853S CAT853F CAT853M CAT863T CAT863S CAT863M RSYM RTYM SOT-23 RoHS (4) (5) NiPdAu Finish RUYM RVYM ORDERING PART NUMBER (6) CAT859CTBI-G CAT859TTBI-G CAT859STBI-G CAT859FTBI-G CAT859MTBI-G CAT869TTBI-G CAT869STBI-G CAT869MTBI-G CAT853CTBI-G CAT853TTBI-G CAT853STBI-G CAT853FTBI-G CAT853MTBI-G CAT863TTBI-G CAT863STBI-G CAT863MTBI-G Notes: (1) All packages are RoHS-compliant (Lead-free, Halogen-free). (2) The device used in the example above is a CAT859STBI-GT10 (Push-Pull / Active Low Output, trip level of 2.85 V to 3.00 V NiPdAu, Tape and Reel). (3) For additional package and temperature options, please contact your nearest ON Semiconductor Sales office. (4) The “YM” in the SOT-23 package marking indicates the Year and Month of production. (5) All NiPdAu devices will be marked to indicate product type. Threshold and full part numbers will be provided on box and reel labels as well as all Shipping documents. (6) For special threshold and package options, contact factory. © 2009 SCILLC. All rights reserved. Characteristics subject to change without notice 9 Doc. No. MD-3026, Rev. G CAT853, CAT863, CAT859, CAT869 REVISION HISTORY Date Rev. Description 11-Oct-06 A Initial Issue CAT859, CAT869 04-May-07 B Added CAT853, CAT863 Update Example of Ordering Information Update Top Marking Update Ordering Part Number 17-Jan-07 C Add Threshold Level - C: 2.40 V Update Package Outline Drawing Add MD- to document number 30-Jan-08 D Added Block Diagrams 05-Nov-08 E Change logo and fine print to ON Semiconductor 04-Mar-09 F Convert to MS Word format 08-Apr-09 G Add Nominal Threshold Voltage 4.20 “F” 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. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner. PUBLICATION ORDERING INFORMATION LITERATURE FULFILLMENT: Literature Distribution Center for ON Semiconductor P.O. Box 5163, Denver, Colorado 80217 USA Phone: 303-675-2175 or 800-344-3860 Toll Free USA/Canada Fax: 303-675-2176 or 800-344-3867 Toll Free USA/Canada Email: [email protected] Doc. No. MD-3026 Rev. G N. American Technical Support: 800-282-9855 Toll Free USA/Canada Europe, Middle East and Africa Technical Support: Phone: 421 33 790 2910 Japan Customer Focus Center: Phone: 81-3-5773-3850 10 ON Semiconductor Website: www.onsemi.com Order Literature: http://www.onsemi.com/orderlit For additional information, please contact your local Sales Representative © 2009 SCILLC. All rights reserved. Characteristics subject to change without notice