CAT811TTBI-T3

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 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 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 underlying floating gate technology, AE2(TM) used by 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 (-40°C to 85°C) 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 © 2010 SCILLC. All rights reserved. Characteristics subject to change without notice 1 Doc. No. MD-3005 Rev. U CAT811, CAT812 PIN DESCRIPTION Pin Number CAT811 CAT812 1 2 — 1 — 2 Name GND ¯¯¯¯¯¯ RESET RESET Description Ground Active LOW reset. ¯¯¯¯¯¯ is asserted if VCC f alls below the reset threshold RESET and remains low for at least 140ms after VCC rises above the reset threshold. Active HIGH reset. RESET is asserted if VCC f alls 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 20kΩ 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. U 2 © 2010 SCILLC. All rights reserved. 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/ºC above +70ºC (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/µs mW ºC ºC ºC 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 VCC Range Supply Current ICC Symbol Conditions TA = 0°C to +70°C TA = -40°C to +85°C TA = -40˚C to +85˚C 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 = +25°C TA = -40°C to +85°C TA = +25°C TA = -40°C to +85°C TA = +25°C TA = -40°C to +85°C TA = +25°C TA = -40°C to +85°C TA = +25°C TA = -40°C to +85°C TA = +25°C TA = -40°C to +85°C TA = +25°C TA = -40°C to +85°C 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 T yp 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 µA 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. © 2010 SCILLC. All rights reserved. Characteristics subject to change without notice 3 Doc. No. MD-3005 Rev. U 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 Reset Threshold Tempco VCC to Reset (2) Delay 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 tM D VIH ¯¯¯ Input MR Threshold VIL VIH VIL ¯¯¯ Pull-up MR Resistance 10 20 VCC > VIH (MAX), CAT811/812R/S/T/Z 0.7VCC 0.25VCC 75 kΩ VCC = VTH to (VTH - 100mV) TA = -40˚C to +85˚C VCC = VTH min, ISINK = 1.2mA CAT811R/S/T/Z VOL VCC = VTH min, ISINK = 3.2mA CAT811J/L/M VCC > 1.0V, ISINK = 50µA VOH VCC = VTH max, ISOURCE = 500µA CAT811R/S/T/Z VCC = VTH max, ISOURCE = 800µA 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 = 150µA 0.8VCC 0.8VCC V VCC - 1.5 0.3 V 0.4 140 Symbol Conditions Min T yp (1) Max Units ppm/˚C µs 30 20 240 400 0.3 0.4 0.3 ms V VOL VOH V tM R Note 3 Note 2 VCC > VTH (MAX), CAT811/812L/M/J 10 100 0.5 2.3V 0.8 µs ns µs V Notes: (1) Production testing done at TA = +25˚C; 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. U 4 © 2010 SCILLC. All rights reserved. Characteristics subject to change without notice CAT811, CAT812 TYPICAL 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. POWER-UP RESET TIMEOUT VS. TEMPERATURE 260 SUPPLY CURRENT (µA) 240 220 200 VCC=2.5V 180 160 -50 0 50 100 150 TEMPERATURE (°C) VCC=5V 12 10 8 6 4 2 0 -50 0 50 100 150 TEMPERATURE (°C) VCC=3.6V VCC=5.5V SUPPLY CURRENT VS. TEMPERATURE (NO LOAD, CAT8xxR/S/T/Z) POWER-UP RESET TIMEOUT (ms) POWER-DOWN RESET DELAY VS. TEMPERATURE (CAT8xxR/S/T/Z) POWER-DOWN RESET DELAY (s) NORMALIZED THRESHOLD 14 12 10 8 6 4 2 0 -50 0 50 100 150 1.0002 1 0.9998 0.9996 0.9994 0.9992 0.999 0.9988 0 NORMALIZED RESET THRESHOLD VS. TEMPERATURE 20 40 60 80 100 120 TEMPERATURE (°C) TEMPERATURE (°C) © 2010 SCILLC. All rights reserved. Characteristics subject to change without notice 5 Doc. No. MD-3005 Rev. U 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 RESET 5V 0V 5V CAT811 RESET 0V CAT812 Figure 1. Reset Timing Diagram VCC T RANSIENT 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. Figure 2 shows the maximum pulse duration of negative-going VCC transients that do not cause a reset condition. 30 TRANSIENT DURATION (s) 25 20 15 10 5 0 1 CAT8xxM 10 100 1000 CAT8xxZ TAMB = 25°C 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). RESET OVERDRIVE VTH - VCC (mV) Figure 2. Maximum Transient Duration without Causing a Reset Pulse vs. Reset Comparator Overdrive Doc. No. MD-3005 Rev. U 6 © 2010 SCILLC. All rights reserved. Characteristics subject to change without notice CAT811, CAT812 VALID RESET WITH VCC UNDER 1.0V To ensure that the CAT811 ¯¯¯¯¯¯ pin is in a known RESET state when VCC is under 1.0V, a 100kΩ pull-down resistor between ¯¯¯¯¯¯ pin and GND is RESET 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 100kΩ CAT811 MR RESET GND 100kΩ CAT812 MR RESET GND Figure 3. ¯¯¯¯¯¯ Valid with VCC under 1.0V RESET Figure 4. RESET Valid with VCC under 1.1V 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 Buffered RESET CAT811 4.7kΩ MR RESET GND VCC (for example: 68HC11) µP RESET INPUT CAT811 GND Bi-directional I/O Pin Figure 5. Bi-directional Reset Pin Interfacing © 2010 SCILLC. All rights reserved. Characteristics subject to change without notice 7 Doc. No. MD-3005 Rev. U CAT811, CAT812 OTHER SUPERVISORY PRODUCTS Function W ith 16k Bit Serial EEPROM Memory W atchdog 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. U 8 © 2010 SCILLC. All rights reserved. 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 θ e1 b 0.60 TOP VIEW 8° A2 A θ c L2 b1 L A1 L1 SIDE VIEW END VIEW Notes: (1) All dimensions are in millimeters. Angles in degrees. (2) Complies with JEDEC satndard TO-253. © 2010 SCILLC. All rights reserved. Characteristics subject to change without notice 9 Doc. No. MD-3005 Rev. U 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 (-40ºC to 85ºC) 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 ON Semiconductor Sales office. Doc. No. MD-3005 Rev. U 10 © 2010 SCILLC. All rights reserved. Characteristics subject to change without notice CAT811, CAT812 REVISION HISTORY Date 22-Oct-03 22-Dec-03 22-Mar-04 25-Mar-04 25-Mar-04 28-Sept-04 28-Dec-05 18-Apr-08 5-Nov-08 19-May-10 Rev. L M N O P Q R S T U Description 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 Change logo and fine print to ON Semiconductor Update Electrical Operating Characteristics ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). 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