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| CAT811, CAT812 4-Pin Microprocessor Power Supply Supervisors with Manual Reset FEATURES 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 = 1.0V 6A 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 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 140ms after the power supply level has risen above that level. The 2(TM) used by underlying floating gate technology, AE Catalyst Semiconductor, makes it possible to offer any custom reset threshold value. Seven industry standard threshold levels are offered to support +5.0V, +3.3V, +3.0V and +2.5V 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. For Ordering Information details, see page 10. APPLICATION Computers, Servers, Laptops Cable modems Wireless communications Embedded control systems White goods Power meters Intelligent instruments PDAs and handheld equipment THRESHOLD SUFFIX SELECTOR DESCRIPTION Nominal Threshold Voltage 4.63V 4.38V 4.00V 3.08V 2.93V 2.63V 2.32V Threshold Suffix Designation L M J T S R Z PIN CONFIGURATION GND 1 CAT811 CAT812 RESET 2 3 MR 4 VCC (c) Catalyst Semiconductor, Inc. Characteristics subject to change without notice 1 Doc. No. MD-3005 Rev. S CAT811, CAT812 PIN DESCRIPTION Pin Number CAT811 CAT812 1 2 -- 1 -- 2 Name GND RESET RESET Description Ground Active LOW reset. RESET is asserted if VCC falls below the reset threshold and remains low for at least 140ms after VCC rises above the reset threshold. Active HIGH reset. RESET is asserted if VCC falls below the reset threshold and remains high for at least 140ms after VCC rises above the reset threshold. Manual Reset Input. A logic LOW on asserts RESET. RESET remains MR active as long as is LOW and for 140ms after returns HIGH. The MR MR active low input has an internal 20k pull-up resistor. The input should be left open if not used. Power supply voltage that is monitored. 3 4 3 4 MR VCC BLOCK DIAGRAM MR VCC TOLERANCE BIAS RESET & DIGITAL DELAY VCC VCC + - RESET VOLTAGE REFERENCE CAT811 GND MR VCC TOLERANCE BIAS RESET & DIGITAL DELAY VCC VCC + - RESET VOLTAGE REFERENCE CAT812 GND Doc. No. MD-3005 Rev. S 2 (c) Catalyst Semiconductor, Inc. Characteristics subject to change without notice CAT811, CAT812 ABSOLUTE MAXIMUM RATINGS (1) Parameters Any pin with respect to ground Input Current, VCC Output Current RESET, RESET Rate of Raise, VCC Continuous Power Dissipations Derate 4mW/C above +70C (SOT-143) Storage Temperature Operating Ambient Temperature Lead Soldering (10 seconds) Ratings -0.3 to + 6.0 20 20 100 320 -65 to +105 -40 to +85 +300 Units V mA mA V/s mW C C C ELECTRICAL OPERATING CHARACTERISTICS VCC = Full range, TA = -40C to +85C unless otherwise noted. Typical values at TA = +25C and VCC = 5V for the L/M/J versions, VCC = 3.3V for the T/S versions, VCC = 3V for the R version and VCC = 2.5V for the Z version. Parameter VCC Range Supply Current ICC Symbol Conditions TA = 0C to +70C TA = -40C to +85C TA = -40C to +85C L Threshold M Threshold J Threshold Reset Threshold Voltage VTH T Threshold S Threshold R Threshold Z Threshold VCC < 5.5V, J/L/M VCC < 3.6V, R/S/T/Z TA = +25C TA = -40C to +85C TA = +25C TA = -40C to +85C TA = +25C TA = -40C to +85C TA = +25C TA = -40C to +85C TA = +25C TA = -40C to +85C TA = +25C TA = -40C to +85C TA = +25C TA = -40C to +85C 4.56 4.50 4.31 4.25 3.93 3.89 3.04 3.00 2.89 2.85 2.59 2.55 2.28 2.25 2.32 2.63 2.93 3.08 4.00 4.38 Min 1.0 1.2 8 6 4.63 Typ Max 5.5 5.5 20 15 4.70 4.75 4.45 4.50 4.06 4.10 3.11 3.15 2.96 3.00 2.66 2.70 2.35 2.38 V Units V A 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. (c) Catalyst Semiconductor, Inc. Characteristics subject to change without notice 3 Doc. No. MD-3005 Rev. S CAT811, CAT812 ELECTRICAL OPERATING CHARACTERISTICS (continued) VCC = Full range, TA = -40C to +85C unless otherwise noted. Typical values at TA = +25C and VCC = 5V for the L/M/J versions, VCC = 3.3V for the T/S versions, VCC = 3V for the R version and VCC = 2.5V for the Z version. Parameter Reset Threshold Tempco VCC to Reset Delay(2) Reset Active Timeout Period RESET Output Voltage Low (Push-pull, active LOW, CAT811) RESET Output Voltage High (Push-pull, active LOW, CAT811) RESET Output Voltage Low (Push-pull, active HIGH, CAT812) RESET Output Voltage High (Push-pull active HIGH, CAT812) Minimum MR Pulse Width Glitch MR Immunity to RESET MR Propagation Delay VCC = VTH to (VTH - 100mV) TA = -40C to +85C VCC = VTH min, ISINK = 1.2mA CAT811R/S/T/Z VOL VCC = VTH min, ISINK = 3.2mA CAT811J/L/M VCC > 1.0V, ISINK = 50A VOH VCC = VTH max, ISOURCE = 500A CAT811R/S/T/Z VCC = VTH max, ISOURCE = 800A CAT811J/L/M VCC > VTH max, ISINK = 1.2mA CAT812R/S/T/Z VCC > VTH max, ISINK = 3.2mA CAT812J/L/M 1.8 V < VCC VTH min, ISOURCE = 150A 0.8VCC 0.8VCC V VCC - 1.5 0.3 V 0.4 140 Symbol Conditions Min Typ (1) 30 20 240 400 0.3 0.4 0.3 V Max Units ppm/C s ms VOL VOH V tMR Note 3 tMD VIH Note 2 VCC > VTH (MAX), CAT811/812L/M/J 10 100 0.5 2.3V 0.8 VCC > VIH (MAX), CAT811/812R/S/T/Z 0.7VCC 0.25VCC 10 20 30 s ns s Input MR Threshold VIL VIH VIL V Pull-up MR Resistance k Notes: (1) Production testing done at TA = +25C; limits over temperature guaranteed by design only. (2) RESET output for the CAT811; RESET output for the CAT812 (3) Glitches of 100ns or less typically will not generate a reset pulse Doc. No. MD-3005 Rev. S 4 (c) Catalyst Semiconductor, Inc. Characteristics subject to change without notice CAT811, CAT812 TYPICAL OPERATING CHARACTERISTICS VCC = Full range, TA = -40C to +85C unless otherwise noted. Typical values at TA = +25C and VCC = 5V for the L/M/J versions, VCC = 3.3V for the T/S versions, VCC = 3V for the R version and VCC = 2.5V for the Z version. POWER-UP RESET TIMEOUT VS. TEMPERATURE 260 12 SUPPLY CURRENT VS. TEMPERATURE (NO LOAD, CAT8xxR/S/T/Z) POWER-UP RESET TIMEOUT (ms) SUPPLY CURRENT (A) 240 220 200 VCC=5V 10 8 6 4 2 0 VCC=5.5V VCC=3.6V VCC=2.5V 180 160 -50 0 50 100 150 TEMPERATURE (C) -50 0 50 100 150 TEMPERATURE (C) POWER-DOWN RESET DELAY VS. TEMPERATURE (CAT8xxR/S/T/Z) NORMALIZED RESET THRESHOLD VS. TEMPERATURE 1.0002 POWER-DOWN RESET DELAY (s) NORMALIZED THRESHOLD 14 12 10 8 6 4 2 0 -50 0 50 100 150 1 0.9998 0.9996 0.9994 0.9992 0.999 0.9988 0 20 40 60 80 100 120 TEMPERATURE (C) TEMPERATURE (C) (c) Catalyst Semiconductor, Inc. Characteristics subject to change without notice 5 Doc. No. MD-3005 Rev. S 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 140ms after the power supply voltage has risen above the threshold. Power 5V Supply Voltage 0V Threshold Voltage Reset Timeout Period 140ms minimum 5V RESET 0V 5V RESET 0V CAT811 CAT812 Figure 1. Reset Timing Diagram VCC TRANSIENT RESPONSE The CAT811/812 protect Ps against brownout failure. Short duration transients of 4s or less and 100mV amplitude typically do not cause a false RESET. Figure 2 shows the maximum pulse duration of negative-going VCC transients that do not cause a reset condition. 30 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 0.5V above the threshold and drops below it by the amplitude of the overdrive voltage (VTH - VCC). TRANSIENT DURATION (s) 25 20 15 10 5 0 1 CAT8xxM 10 TAMB = 25C CAT8xxZ 100 1000 RESET OVERDRIVE VTH - VCC (mV) Figure 2. Maximum Transient Duration without Causing a Reset Pulse vs. Reset Comparator Overdrive Doc. No. MD-3005 Rev. S 6 (c) Catalyst Semiconductor, Inc. Characteristics subject to change without notice CAT811, CAT812 VALID RESET WITH VCC UNDER 1.0V To ensure that the CAT811 RESET pin is in a known state when VCC is under 1.0V, a 100k 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 Power Supply VCC 100k CAT811 MR RESET GND 100k CAT812 MR RESET GND Figure 3. RESET Valid with VCC under 1.0V Figure 4. RESET Valid with VCC under 1.1V BI-DIRECTIONAL RESET PIN INTERFACING The CAT811/812 can interface with P/C bidirectional reset pins by connecting a 4.7k resistor in series with the CAT811/812 reset output and the P/C bi-directional reset pin. BUF Power Supply Buffered RESET CAT811 4.7k MR RESET GND VCC (for example: 68HC11) P RESET INPUT CAT811 GND Bi-directional I/O Pin Figure 5. Bi-directional Reset Pin Interfacing (c) Catalyst Semiconductor, Inc. Characteristics subject to change without notice 7 Doc. No. MD-3005 Rev. S CAT811, CAT812 OTHER SUPERVISORY PRODUCTS Function With 16k Bit Serial EEPROM Memory Watchdog Timer Manual Reset Input Active Low Reset Active High Reset Dual Polarity Reset Outputs Package 8-pin DIP and SOIC 8-pin DIP and SOIC 3-pin SOT-23 and SC70 3-pin SOT-23 and SC70 4-pin SOT-143 4-pin SOT-143 CAT1161/3 CAT1162 CAT809 CAT810 CAT811 CAT812 Doc. No. MD-3005 Rev. S 8 (c) Catalyst Semiconductor, Inc. Characteristics subject to change without notice CAT811, CAT812 PACKAGE OUTLINE DRAWING SOT-143 4-Lead (TB) (1) SYMBOL MIN NOM MAX A D e 0.80 0.05 0.75 0.30 0.76 0.08 2.80 2.10 1.20 1.30 1.92 BSC 0.20 BSC 0.40 0.50 0.54 REF 0.25 0 2.90 0.90 1.22 0.15 1.07 0.50 0.89 0.20 3.04 2.64 1.40 A1 A2 b b2 c E1 E D E E1 e e1 L L1 L2 e1 b 0.60 TOP VIEW 8 A2 A c L2 b1 L A1 L1 SIDE VIEW END VIEW For current Tape and Reel information, download the PDF file from: http://www.catsemi.com/documents/tapeandreel.pdf. Notes: (1) All dimensions are in millimeters. Angles in degrees. (2) Complies with JEDEC satndard TO-253. (c) Catalyst Semiconductor, Inc. Characteristics subject to change without notice 9 Doc. No. MD-3005 Rev. S CAT811, CAT812 EXAMPLE OF ORDERING INFORMATION (1) Prefix CAT Company ID Product Number 811: Push-Pull/Active Low Output 812: Push-Pull/Active High Output Device # 811 Suffix S Trip Level L: 4.63V M: 4.38V J: 4.00V T: 3.08V S: 2.93V R: 2.63V Z: 2.32V TB Package TB: SOT-143 I -G Lead Finish Blank: Matte-Tin G: NiPdAu T10 Tape & Reel T: Tape & Reel 3: 3,000/Reel 10: 10,000/Reel Temperature Range I = Industrial (-40C to 85C) For Product Top Mark Codes, click here: http://www.catsemi.com/techsupport/producttopmark.asp Notes: (1) All packages are RoHS-compliant (Lead-free, Halogen-free). (2) (3) (4) The standard lead finish is NiPdAu. Contact factory for other package availability. This device used in the above example is a CAT811STBI-GT10 (SOT-143 4-Lead, Push-Pull/Active Low Output, trip level of 2.85V to 3.00V, NiPdAu, Tape & Reel, 10,000/Reel) For additional package and temperature options, please contact your nearest Catalyst Semiconductor Sales office. Doc. No. MD-3005 Rev. S 10 (c) Catalyst Semiconductor, Inc. Characteristics subject to change without notice REVISION HISTORY Date 10/22/2003 12/22/2003 03/22/2004 03/25/2004 03/25/2004 09/28/2004 12/28/2005 04/18/2008 Rev. L M N O P Q R S Reason Updated Ordering Information Updated Features Replaced power-up reset timeout vs. temperature graph with updated one Replaced VCC Transient Response graph with updated one General data sheet updates Updated Electrical Characteristics (Reset Active Timeout Period Max) Corrected Pin Configure diagram Minor changes Updated Features Updated Ordering Information Updated Top Marking Add "MD-" to document number Add Block Diagrams Updated Package Outline Drawing Update Example of Ordering Information Copyrights, Trademarks and Patents (c) Catalyst Semiconductor, Inc. Trademarks and registered trademarks of Catalyst Semiconductor include each of the following: Adaptive AnalogTM, Beyond MemoryTM, DPPTM, EZDimTM, LDDTM, MiniPotTM, Quad-ModeTM and Quantum Charge ProgrammableTM Catalyst Semiconductor has been issued U.S. and foreign patents and has patent applications pending that protect its products. CATALYST SEMICONDUCTOR MAKES NO WARRANTY, REPRESENTATION OR GUARANTEE, EXPRESS OR IMPLIED, REGARDING THE SUITABILITY OF ITS PRODUCTS FOR ANY PARTICULAR PURPOSE, NOR THAT THE USE OF ITS PRODUCTS WILL NOT INFRINGE ITS INTELLECTUAL PROPERTY RIGHTS OR THE RIGHTS OF THIRD PARTIES WITH RESPECT TO ANY PARTICULAR USE OR APPLICATION AND SPECIFICALLY DISCLAIMS ANY AND ALL LIABILITY ARISING OUT OF ANY SUCH USE OR APPLICATION, INCLUDING BUT NOT LIMITED TO, CONSEQUENTIAL OR INCIDENTAL DAMAGES. Catalyst Semiconductor 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 Catalyst Semiconductor product could create a situation where personal injury or death may occur. Catalyst Semiconductor reserves the right to make changes to or discontinue any product or service described herein without notice. Products with data sheets labeled "Advance Information" or "Preliminary" and other products described herein may not be in production or offered for sale. Catalyst Semiconductor advises customers to obtain the current version of the relevant product information before placing orders. Circuit diagrams illustrate typical semiconductor applications and may not be complete. Catalyst Semiconductor, Inc. Corporate Headquarters 2975 Stender Way Santa Clara, CA 95054 Phone: 408.542.1000 Fax: 408.542.1200 www.catsemi.com Document No: MD-3005 Revision: S Issue date: 04/18/08 |
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