CAT811LTBI-GT3

CAT811 Voltage Supervisor, 4-Pin, Push-Pull, Active Low, with Manual Reset Description The CAT811 is a microprocessor supervisory circuit that monitors power supplies. The CAT811 is a direct replacement for the MAX811 in applications operating over the industrial temperature range and has 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 140 ms after the power supply level has risen above that level. The underlying floating gate technology, Analog EEPROM used by ON Semiconductor, makes it possible to offer any custom reset threshold value. Seven industry standard threshold levels are offered to support +5.0 V, +3.3 V, +3.0 V and +2.5 V systems. The CAT811 features a RESET push−pull output (active LOW). 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 is fully specified over the industrial temperature range (−40°C to 85°C) and is available in a compact 4−pin SOT−143 package. www.onsemi.com SOT−143 BI SUFFIX CASE 527AF PIN CONFIGURATION 1 2 • Precision Monitoring of • • • • • • +5.0 V (± 5%, ± 10%, ± 20%), +3.3 V (± 5%, ± 10%) Manual Reset Input Output Configuration: Active LOW Reset Direct Replacements for the MAX811 in Applications Operating over the Industrial Temperature Range Reset Valid down to VCC = 1.0 V 6 mA Power Supply Current Power Supply Transient Immunity Available in SOT−143 Packages with Sn or NiPdAu Green Lead Finishes Industrial Temperature Range: −40°C to +85°C These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS Compliant July, 2015 − Rev. 3 MR (Top View) MARKING DIAGRAM XXXMG G 1 XXX M G = Specific Device Code = Month Code = Pb−Free Package (Note: Microdot may be in either location) ORDERING INFORMATION See detailed ordering and shipping information in the package dimensions section on page 9 of this data sheet. Computers, Servers, Laptops and Cable Modems Wireless Communications Embedded Control Systems White Goods, Power Meters Intelligent Instruments PDAs and Handheld Equipment © Semiconductor Components Industries, LLC, 2015 3 RESET Applications • • • • • • VCC GND Features • • • 4 1 Publication Order Number: CAT811/D CAT811 Table 1. THRESHOLD SUFFIX SELECTOR DESCRIPTION Nominal Threshold Voltage Threshold Suffix Designation 4.63 V L 3.08 V T 2.93 V S Table 2. PIN DESCRIPTION Pin Number Pin Name Description 1 GND 2 RESET 3 MR Manual Reset Input. A logic LOW on MR asserts RESET. RESET remains active as long as MR is LOW and for 140 ms after MR returns HIGH. The active low input has an internal 20 kW pull−up resistor. The input should be left open if not used. 4 VCC Power supply voltage that is monitored. Ground. 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. VCC MR VCC VCC TOLERANCE BIAS RESET & DIGITAL DELAY + – RESET VOLTAGE REFERENCE CAT811 GND Figure 1. Block Diagrams www.onsemi.com 2 CAT811 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 Raise, VCC 100 V/ms Continuous Power Dissipations Derate 4 mW/°C above +70°C (SOT−143) 320 mW Storage Temperature Range −65 to +105 °C Operating Ambient Temperature Range −40 to +85 °C +300 °C Any pin with respect to ground Lead Soldering Temperature (10 seconds) Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality should not be assumed, damage may occur and reliability may be affected. Table 4. ELECTRICAL OPERATING CHARACTERISTICS (VCC = Full range, TA = −40°C to +85°C unless otherwise noted. Typical values at TA = +25°C and VCC = 5 V for the L version, VCC = 3.3 V for the T/S versions.) Parameter Symbol VCC Range Supply Current Reset Threshold Voltage ICC VTH Conditions Min TA = 0°C to +70°C TA = −40°C to +85°C TA = −40°C to +85°C Typ Max Units 1.0 5.5 V 1.2 5.5 VCC < 5.5 V, L 8 20 VCC < 3.6 V, S/T 6 15 4.63 4.70 L Threshold TA = +25°C 4.56 TA = −40°C to +85°C 4.50 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 T Threshold S Threshold Reset Threshold Tempco VCC to Reset Delay (Note 3) VCC = VTH to (VTH − 100 mV) Reset Active Timeout Period TA = −40°C to +85°C 1. Production testing done at TA = +25°C; limits over temperature guaranteed by design only. 2. Glitches of 100 ns or less typically will not generate a reset pulse. 3. RESET output for the CAT811. www.onsemi.com 3 140 mA V 4.75 3.08 3.11 3.15 2.93 2.96 3.00 30 ppm/°C 20 ms 240 400 ms CAT811 Table 4. ELECTRICAL OPERATING CHARACTERISTICS (VCC = Full range, TA = −40°C to +85°C unless otherwise noted. Typical values at TA = +25°C and VCC = 5 V for the L version, VCC = 3.3 V for the T/S versions.) Parameter Symbol Conditions RESET Output Voltage Low (Push−pull, active LOW, CAT811) VOL RESET Output Voltage High (Push−pull, active LOW, CAT811) VOH MR Minimum Pulse Width tMR MR Glitch Immunity Min Typ Max Units VCC = VTH min, ISINK = 1.2 mA CAT811S/T 0.3 V VCC = VTH min, ISINK = 3.2 mA CAT811L 0.4 VCC > 1.0 V, ISINK = 50 mA 0.3 VCC = VTH max, ISOURCE = 500 mA CAT811S/T 0.8VCC V VCC = VTH max, ISOURCE = 800 mA CAT811L VCC − 1.5 V 10 ms (Note 2) 100 ns 0.5 ms MR to RESET Propagation Delay tMD (Note 3) MR Input Threshold VIH VCC > VTH (MAX), CAT811L V 2.3V VIL VIH 0.8 VCC > VIH (MAX), CAT811S/T 0.7VCC VIL 0.25VCC MR Pull−up Resistance 10 1. Production testing done at TA = +25°C; limits over temperature guaranteed by design only. 2. Glitches of 100 ns or less typically will not generate a reset pulse. 3. RESET output for the CAT811. www.onsemi.com 4 20 75 kW CAT811 TYPICAL OPERATING CHARACTERISTICS (VCC = Full range, TA = −40°C to +85°C unless otherwise noted. Typical values at TA = +25°C and VCC = 5 V for the L version, VCC = 3.3 V for the T/S versions.) SUPPLY CURRENT (mA) 240 VCC = 5 V 220 VCC = 2.5 V 200 180 160 −50 POWER−DOWN RESET DELAY (s) 12 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, CAT811S/T) 14 1.0002 12 1.0000 10 8 6 4 2 0 −50 VCC = 3.6 V 6 0 −50 150 NORMALIZED THRESHOLD POWER−UP RESET TIMEOUT (ms) 260 0.9998 0.9996 0.9994 0.9992 0.9990 0.9988 0 50 100 0 150 20 40 60 80 100 TEMPERATURE (°C) TEMPERATURE (°C) Figure 4. Power−Down Reset Delay vs. Temperature (CAT811S/T) Figure 5. Normalized Reset Threshold vs. Temperature www.onsemi.com 5 120 CAT811 DETAILED DESCRIPTION Reset Timing The reset signal is asserted LOW for the CAT811 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 5V VCC 0V 140 ms minimum 5V CAT811 RESET Reset Timeout Period 0V VCC CAT812 RESET 0V Figure 6. Reset Timing Diagram VCC Transient Response Valid Reset with VCC under 1.0 V The CAT811 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 CAT811 RESET pin is in a known state when VCC is under 1.0 V, a 100 kW pull−down resistor between RESET pin and GND is recommended; the value is not critical. Power Supply VCC CAT811 30 MR RESET TRANSIENT DURATION (ms) TAMB = 25°C GND 100 kW 25 20 CAT811Z Figure 8. RESET Valid with VCC Under 1.0 V 15 CAT811M 10 5 0 1 10 100 1000 RESET OVERDRIVE VTH − VCC (mV) Figure 7. Maximum Transient Duration without Causing a Reset Pulse vs. Reset Comparator Overdrive www.onsemi.com 6 CAT811 Bi−directional Reset Pin Interfacing The CAT811 can interface with mP/mC bi−directional reset pins by connecting a 4.7 kW resistor in series with the CAT811 reset output and the mP/mC bi−directional reset pin. BUF Buffered RESET Power Supply CAT811 VCC mP 4.7 kW MR RESET (for example: 68HC11) RESET INPUT C AT8 11 GND GND Bi−directional I/O Pin Figure 9. Bi−directional Reset Pin Interfacing Table 5. OTHER SUPERVISORY PRODUCTS Function CAT1161/3 CAT1162 With 16k Bit Serial EEPROM Memory a a Watchdog Timer a Manual Reset Input a CAT809 a a a Active High Reset Package CAT811 a a Active Low Reset Dual Polarity Reset Outputs CAT810 a a 8−pin DIP and SOIC 8−pin DIP and SOIC www.onsemi.com 7 3−pin SOT−23 and SC70 3−pin SOT−23 and SC70 4−pin SOT−143 CAT811 ORDERING INFORMATION Order Number Output Reset Package Quantity per Reel (Note 5) Manual Reset LOW SOT−143−4 3,000 Top Mark (Note 4) NiPdAu Voltage NiPdAu CAT811LTBI−GT3 4.63 V VEA CAT811MTBI−GT3 4.38 V VEA CAT811JTBI−GT3 4.00 V VEA CAT811TTBI−GT3 3.08 V VEA CAT811STBI−GT3 2.93 V VEA CAT811RTBI−GT3 2.63 V VEA CAT811ZTBI−GT3 2.32 V VEA 4. Threshold and full part numbers will be provided on box and reel labels as well as all Shipping documents. 5. 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. 6. 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 www.onsemi.com 8 MECHANICAL CASE OUTLINE PACKAGE DIMENSIONS SOT−143, 4 Lead CASE 527AF−01 ISSUE A DATE 24 MAR 2009 SYMBOL MIN 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 4 3 E1 1 E c 0.08 D 2.80 E 2.10 E1 1.20 e 2 0.40 L1 2.64 1.30 0.50 0° 1.40 0.60 8° q A 3.04 0.25 θ A2 0.20 2.90 0.54 REF L2 TOP VIEW 1.07 0.20 BSC L b 0.90 MAX 1.92 BSC e1 e1 NOM c L2 L b2 A1 L1 SIDE VIEW END VIEW Notes: (1) All dimensions are in millimeters. Angles in degrees. (2) Complies with JEDEC TO-253. DOCUMENT NUMBER: DESCRIPTION: 98AON34306E SOT−143, 4 LEAD Electronic versions are uncontrolled except when accessed directly from the Document Repository. Printed versions are uncontrolled except when stamped “CONTROLLED COPY” in red. PAGE 1 OF 1 ON Semiconductor and are trademarks of Semiconductor Components Industries, LLC dba ON Semiconductor or its subsidiaries in the United States and/or other countries. ON Semiconductor reserves the right to make changes without further notice to any products herein. ON Semiconductor makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does ON Semiconductor 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. 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