CAT811, CAT812 4-Pin Microprocessor Power Supply Supervisors with Manual Reset FEATURES DESCRIPTION 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 6µA power supply current Power supply transient immunity Available in SOT-143 packages with Sn or NiPdAu Green Lead finishes. Industrial temperature range: -40ºC to +85ºC 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. APPLICATION Computers, Servers, Laptops Cable modems Wireless communications Embedded control systems White goods Power meters Intelligent instruments PDAs and handheld equipment The CAT811/812 are fully specified over the industrial temperature range (-40°C to 85°C) and are available in a compact 4-pin SOT-143 package. For Ordering Information details, see page 10. PIN CONFIGURATION THRESHOLD SUFFIX SELECTOR DESCRIPTION Nominal Threshold Voltage Threshold Suffix Designation 4.63V 4.38V 4.00V L M J 3.08V 2.93V 2.63V T S R 2.32V Z © Catalyst Semiconductor, Inc. Characteristics subject to change without notice GND 1 4 VCC 3 ¯¯¯ MR CAT811 CAT812 ¯¯¯¯¯¯ RESET 1 2 Doc. No. MD-3005 Rev. S CAT811, CAT812 PIN DESCRIPTION Pin Number CAT811 CAT812 Name Description Ground ¯¯¯¯¯¯ is asserted if VCC falls below the reset threshold Active LOW reset. RESET 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 ¯¯¯ MR asserts RESET. RESET remains active as long as ¯¯¯ MR is LOW and for 140ms after ¯¯¯ MR returns HIGH. The active low input has an internal 20kΩ pull-up resistor. The input should be left open if not used. Power supply voltage that is monitored. 1 1 GND 2 — ¯¯¯¯¯¯ RESET — 2 RESET 3 3 ¯¯¯ MR 4 4 VCC BLOCK DIAGRAM 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 Doc. No. MD-3005 Rev. S 2 © Catalyst Semiconductor, Inc. Characteristics subject to change without notice CAT811, CAT812 ABSOLUTE MAXIMUM RATINGS (1) 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/µs 320 mW Storage Temperature -65 to +105 ºC Operating Ambient Temperature -40 to +85 ºC +300 ºC Any pin with respect to ground Continuous Power Dissipations Derate 4mW/ºC above +70ºC (SOT-143) Lead Soldering (10 seconds) ELECTRICAL OPERATING CHARACTERISTICS VCC = Full range, TA = -40°C to +85°C unless otherwise noted. Typical values at TA = +25°C 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 Symbol VCC Range Supply Current ICC Conditions Max 1.0 5.5 TA = -40°C to +85°C 1.2 5.5 TA = -40˚C to +85˚C M Threshold J Threshold VTH Typ TA = 0°C to +70°C L Threshold Reset Threshold Voltage Min T Threshold S Threshold R Threshold Z Threshold VCC < 5.5V, J/L/M 8 20 VCC < 3.6V, R/S/T/Z 6 15 4.63 4.70 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 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 2.28 TA = -40°C to +85°C 2.25 Units V µA 4.75 4.38 4.45 4.50 4.00 4.06 4.10 3.08 3.11 3.15 2.93 V 2.96 3.00 2.63 2.66 2.70 2.32 2.35 2.38 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. © 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 = -40°C to +85°C unless otherwise noted. Typical values at TA = +25°C 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 Symbol Conditions Min Reset Threshold Tempco VCC to Reset Delay(2) VCC = VTH to (VTH - 100mV) Reset Active Timeout Period TA = -40˚C to +85˚C ¯¯¯¯¯¯ Output RESET Voltage Low (Push-pull, active LOW, CAT811) ¯¯¯¯¯¯ Output RESET Voltage High (Push-pull, active LOW, CAT811) VOL 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 ¯¯¯ MR Glitch Immunity ¯¯¯ MR to RESET Propagation Delay ¯¯¯ MR Input Threshold 140 Typ (1) Max 30 ppm/˚C 20 µs 240 400 VCC = VTH min, ISINK = 1.2mA CAT811R/S/T/Z 0.3 VCC = VTH min, ISINK = 3.2mA CAT811J/L/M 0.4 VCC > 1.0V, ISINK = 50µA 0.3 VCC = VTH max, ISOURCE = 500µA CAT811R/S/T/Z 0.8VCC VCC = VTH max, ISOURCE = 800µA CAT811J/L/M VCC - 1.5 ms V V VCC > VTH max, ISINK = 1.2mA CAT812R/S/T/Z 0.3 VCC > VTH max, ISINK = 3.2mA CAT812J/L/M 0.4 1.8 V < VCC ≤ VTH min, ISOURCE = 150µA Units V 0.8VCC V 10 µs tMR Note 3 100 ns tMD Note 2 0.5 µs VIH VCC > VTH (MAX), CAT811/812L/M/J 2.3V VIL VIH 0.8 VCC > VIH (MAX), CAT811/812R/S/T/Z V 0.7VCC VIL 0.25VCC ¯¯¯ MR Pull-up Resistance 10 20 30 kΩ Notes: (1) Production testing done at TA = +25˚C; limits over temperature guaranteed by design only. ¯¯¯¯¯¯ output for the CAT811; RESET output for the CAT812 (2) RESET (3) Glitches of 100ns or less typically will not generate a reset pulse Doc. No. MD-3005 Rev. S 4 © Catalyst Semiconductor, Inc. Characteristics subject to change without notice CAT811, CAT812 TYPICAL OPERATING CHARACTERISTICS POWER-UP RESET TIMEOUT VS. TEMPERATURE SUPPLY CURRENT VS. TEMPERATURE (NO LOAD, CAT8xxR/S/T/Z) 260 12 240 SUPPLY CURRENT (µA) POWER-UP RESET TIMEOUT (ms) VCC = Full range, TA = -40°C to +85°C unless otherwise noted. Typical values at TA = +25°C 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. VCC=5V 220 200 VCC=2.5V 180 VCC=5.5V 10 8 VCC=3.6V 6 4 2 0 160 -50 0 50 100 -50 150 0 TEMPERATURE (°C) 150 NORMALIZED RESET THRESHOLD VS. TEMPERATURE 1.0002 14 NORMALIZED THRESHOLD POWER-DOWN RESET DELAY (s) 100 TEMPERATURE (°C) POWER-DOWN RESET DELAY VS. TEMPERATURE (CAT8xxR/S/T/Z) 12 10 8 6 4 2 0 -50 50 1 0.9998 0.9996 0.9994 0.9992 0.999 0.9988 0 50 100 150 0 TEMPERATURE (°C) © Catalyst Semiconductor, Inc. Characteristics subject to change without notice 20 40 60 80 100 120 TEMPERATURE (°C) 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. Threshold Voltage Power 5V Supply Voltage 0V Reset Timeout Period 140ms minimum 5V RESET CAT811 0V 5V RESET CAT812 0V Figure 1. Reset Timing Diagram VCC TRANSIENT RESPONSE The CAT811/812 protect µPs against brownout failure. Short duration transients of 4µs or less and 100mV amplitude typically do not cause a false RESET. 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). Figure 2 shows the maximum pulse duration of negative-going VCC transients that do not cause a reset condition. TRANSIENT DURATION (s) 30 TAMB = 25°C 25 20 15 CAT8xxZ 10 5 0 CAT8xxM 1 10 100 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 © Catalyst Semiconductor, Inc. Characteristics subject to change without notice CAT811, CAT812 VALID RESET WITH VCC UNDER 1.0V ¯¯¯¯¯¯ pin is in a known To ensure that the CAT811 RESET state when VCC is under 1.0V, a 100kΩ pull-down ¯¯¯¯¯¯ pin and GND is resistor between RESET recommended; the value is not critical. For the CAT812, a pull-up resistor from RESET pin to VCC is needed. Power Supply Power Supply VCC VCC 100kΩ CAT811 MR CAT812 RESET GND MR 100kΩ RESET GND Figure 4. RESET Valid with VCC under 1.1V ¯¯¯¯¯¯ Valid with VCC under 1.0V Figure 3. RESET BI-DIRECTIONAL RESET PIN INTERFACING The CAT811/812 can interface with µP/µC bidirectional reset pins by connecting a 4.7kΩ resistor in series with the CAT811/812 reset output and the µP/µC bi-directional reset pin. BUF Power Supply VCC CAT811 (for example: 68HC11) µP 4.7kΩ MR Buffered RESET RESET RESET INPUT GND CAT811 GND Bi-directional I/O Pin Figure 5. Bi-directional Reset Pin Interfacing © 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 CAT1161/3 CAT1162 CAT809 CAT810 CAT811 CAT812 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 Manual Reset Input Active Low Reset Active High Reset Dual Polarity Reset Outputs Package Doc. No. MD-3005 Rev. S 8 © 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 0.80 1.22 D A1 0.05 0.15 e A2 0.75 b 0.30 0.50 b2 0.76 0.89 E1 e1 E c 0.08 D 2.80 E 2.10 E1 1.20 A2 1.30 1.40 2.64 1.92 BSC 0.20 BSC 0.50 L1 0.54 REF L2 0.25 θ TOP VIEW 0.20 3.04 e 0.40 0° 0.60 8° c θ A 1.07 2.90 e1 L b 0.90 L2 L b1 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. © 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 Device # 811 Suffix S Company ID Product Number 811: Push-Pull/Active Low Output 812: Push-Pull/Active High Output 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 T10 Lead Finish Blank: Matte-Tin G: NiPdAu Tape & Reel T: Tape & Reel 3: 3,000/Reel 10: 10,000/Reel Temperature Range I = Industrial (-40ºC to 85ºC) 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) The standard lead finish is NiPdAu. Contact factory for other package availability. (3) 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) (4) For additional package and temperature options, please contact your nearest Catalyst Semiconductor Sales office. Doc. No. MD-3005 Rev. S 10 © Catalyst Semiconductor, Inc. Characteristics subject to change without notice REVISION HISTORY Date Rev. Reason 10/22/2003 L Updated Ordering Information 12/22/2003 M Updated Features Replaced power-up reset timeout vs. temperature graph with updated one Replaced VCC Transient Response graph with updated one 03/22/2004 N General data sheet updates 03/25/2004 O Updated Electrical Characteristics (Reset Active Timeout Period Max) 03/25/2004 P Corrected Pin Configure diagram 09/28/2004 Q Minor changes 12/28/2005 R Updated Features Updated Ordering Information Updated Top Marking S Add “MD-“ to document number Add Block Diagrams Updated Package Outline Drawing Update Example of Ordering Information 04/18/2008 Copyrights, Trademarks and Patents © Catalyst Semiconductor, Inc. Trademarks and registered trademarks of Catalyst Semiconductor include each of the following: Adaptive Analog™, Beyond Memory™, DPP™, EZDim™, LDD™, MiniPot™, Quad-Mode™ and Quantum Charge Programmable™ 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