CAT8836 NanoPower Supervisory Circuit Description The CAT8836 is a voltage supervisory circuit intended to provide circuit initialization and start−up timing for DSPs and other processor−based systems. When system power comes on, CAT8836’s output once the supply voltage VDD becomes higher than 1.1 V. Thereafter, the supervisory circuit monitors VDD and keeps the output active as long as VDD remains below the threshold voltage of VTH. After VDD exceeds the monitoring threshold an internal timer delays the return of the output to the inactive state (high) to ensure proper system reset. The duration of this reset delay is controlled by the CT input. When CT is connected to GND the reset delay is 10 ms, typical, in duration and when connected to VDD, the delay time is typically 200 ms. Whenever the supply voltage drops below the monitoring threshold voltage VTH, the output becomes active (low) again. • Supply Current: 220 nA (typical) • Precision Supply Voltage Supervision Range: 1.8 V, 2.5 V, 3.0 V, and • • • • • • 3.3 V Power−On Reset Generator with Selectable Delay Time: 10 ms or 200 ms Push/Pull RESET (active low) Output Manual Reset Input Pin−for−Pin Replacement for TPS3836 TSOT23−5 Package Temperature Range: −40°C to +85°C These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS Compliant Typical Applications • Applications Using Low−Power DSPs, Microcontrollers, or • • • • • Microprocessors Portable− and Battery−Powered Equipment Intelligent Instruments Wireless Communication Systems Automotive Systems Notebook Computers © Semiconductor Components Industries, LLC, 2011 January, 2011 − Rev. 0 TSOT−23 TD SUFFIX CASE 419AE PIN CONNECTIONS 1 CT VDD GND Features • http://onsemi.com RESET MR (Top View) MARKING DIAGRAM UTYM UT = Device Code Y = Production Year (Last Digit) M = Production Month: 1−9 (Jan − Sep), = O, N, D (Oct − Dec) ORDERING INFORMATION See detailed ordering and shipping information in the package dimensions section on page 7 of this data sheet. 1 Publication Order Number: CAT8836/D CAT8836 VDD R C1 MR + C2 CT Reset Logic and Timer RESET − VTH (REF) GND CAT8836 Figure 1. Functional Block Diagram Table 1. PIN FUNCTION DESCRIPTION Pin Number Pin Name 1 CT 2 GND 3 MR 4 RESET 5 VDD Description Delay select pin for a fixed value of 10 ms or 200 ms. Ground Manual Reset Active low Reset. Reset is asserted either if VDD falls below reset threshold or if MR is activated. Supply Voltage which is monitored Table 2. ABSOLUTE MAXIMUM RATINGS (Over operating free−air temperature range, unless otherwise noted.) Parameter Symbol Supply voltage (Note 1) VDD All other pins (Note 1) Value Unit 7 V −0.3 to 6 V Maximum low output current IOL 5 mA Maximum high output current IOH −5 mA Input clamp current, (VI < 0 or VI > VDD) IIK ±10 mA Output clamp current, (VO < 0 or VO > VDD) IOK ±10 mA TSTG −65 to +150 °C +260 °C Storage temperature range Soldering temperature Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability. 1. All voltages are with respect to GND. Table 3. RECOMMENDED OPERATING CONDITIONS (Note 2) Parameter Supply voltage Symbol Min Max Unit VDD 1.6 5.5 V 0 VDD + 0.3 V Voltage range, CT, MR and RESET pins High−level input voltage VIH Low−level input voltage Input transition rise and fall rate at MR Operating temperature range V VIL 0.3 × VDD V Dt/DV 100 ns/V +85 °C TA 2. Refer to Electrical Characteristics and Application Information for Safe Operating Area. http://onsemi.com 2 0.7 × VDD −40 CAT8836 Table 4. ELECTRICAL CHARACTERISTICS (Over recommended operating conditions, unless otherwise noted.) Parameter Symbol Test Conditions Min RESET high−level output voltage VOH VDD = 3.3 V, IOH = −2 mA 0.8 × VDD RESET Low−level output voltage VOL VDD = 1.8 V, IOL = 1 mA Typ Max Unit V 0.4 V 0.2 V VDD = 3.3 V, IOL = 2 mA RESET power−up voltage (Note 3) VDD ≥ 1.1 V, IOL = 50 mA Negative−going input threshold voltage (Note 4) CAT8836E18 VTH TA = −40°C to +85°C 1.74 V CAT8836J25 2.18 2.25 2.29 V 2.70 2.79 2.85 V CAT8836L30 2.56 2.64 2.69 V CAT8836K33 2.84 2.93 2.99 V VHYS MR (Note 5) IIH MR (Note 5) 30 2.5 V < VIT < 3.5 V 40 CT = VDD = 5.5 V −25 IIL MR = 0 V, VDD = 5.5 V −130 CT = 0 V, VDD = 5.5 V −25 IDD VDD > VTH, VDD < 3 V 220 VDD > VTH, VDD > 3 V 250 450 VDD < VTH 10 15 Internal pull−up resistor at MR RIN Input capacitance at MR and CT CI VI = 0 V to VDD −60 mV −40 CT Supply current 1.7 V < VIT < 2.5 V MR = 0.7 × VDD, VDD = 5.5 V CT Input low−level current 1.71 CAT8836H30 Hysteresis at VDD input Input high−level current 1.66 −200 −100 mA +25 nA −340 mA +25 nA 400 nA mA 30 kW 5 pF 3. The lowest voltage at which the RESET output becomes active. tR, VDD ≥ 15 ms/V. 4. To ensure best stability of the threshold voltage, a bypass capacitor (ceramic, 0.1 mF) should be placed near the supply terminal. 5. If manual reset is unused, MR should be connected to VDD to minimize current consumption. Table 5. SWITCHING CHARACTERISTICS (At TA = +25°C, RL = 1 MW, and CL = 50 pF, unless otherwise noted.) Parameter Delay time Propagation (delay) time, high−to−low−level output Propagation (delay) time, high−to−low−level output VDD to RESET delay MR to RESET delay Symbol Test Conditions Min Typ Max Unit tPD VDD ≥ VTH + 0.2 V, MR = 0.7 × VDD, CT = GND 5 10 15 ms VDD ≥ VTH + 0.2 V, MR = 0.7 × VDD, CT = VDD 100 200 300 tPHL tMHL VIL = VTH − 0.2 V, VIH = VTH + 0.2 V 10 VIL = 1.6 V 50 VDD ≥ VTH + 0.2 V, VIL = 0.3 × VDD, VIH = 0.7 × VDD 100 ms ns Table 6. TIMING REQUIREMENTS (At TA = +25°C, RL = 1 MW, and CL = 50 pF, unless otherwise noted.) Parameter Pulse width Symbol Test Conditions Min at VDD tW VIH = VTH + 0.2 V, VIL = VTH – 0.2 V 6 at MR tWR VDD ≥ VTH + 0.2 V, VIL = 0.3 × VDD, VIH = 0.7 × VDD 1 http://onsemi.com 3 Typ Max Unit ms CAT8836 Table 7. FUNCTION TABLE MR VDD > VTH RESET L 0 L L 1 L H 0 L H 1 H CAT8836 RESET RL CL Figure 2. Test Circuit TIMING DIAGRAM VDD VTH < 1.1 V t MR t RESET t Undefined Output tPD tPD tPHL Figure 3. Timing Diagram http://onsemi.com 4 Undefined Output CAT8836 TYPICAL CHARACTERISTICS 240 1.0005 220 1.0000 0.9995 VTH_VCC (V) ISB (nA) 200 180 160 140 90°C 25°C −40°C 120 100 1.5 2.5 3.5 0.9990 0.9985 0.9980 0.9975 0.9970 4.5 0.9965 −40 5.5 TEMPERATURE (°C) Figure 4. Supply Current vs. Supply Voltage Figure 5. Normalized Reset Threshold Voltage vs. Temperature 200 9.8 195 9.6 190 9.4 9.2 TRST (ms) TRST (ms) 90 VCC (V) 10.0 9.0 8.8 8.6 1.5 2.5 3.5 185 180 175 90°C 25°C −40°C 170 90°C 25°C −40°C 8.4 8.2 8.0 25 165 4.5 160 5.5 1.5 2.5 3.5 4.5 VCC (V) VCC (V) Figure 6. Reset Time Out vs. VCC (CT = 0 V) Figure 7. Reset Time Out vs. VCC (CT = 5 V) 5.5 Detailed Description The supervisory circuit monitors VDD and keeps the RESET output active as long as VDD remains below the threshold voltage of VTH. An internal timer delays the return of the output to the inactive state (high) to ensure proper system reset. The delay time starts after VDD has risen above the threshold. http://onsemi.com 5 CAT8836 PACKAGE DIMENSIONS TSOT−23, 5 LEAD CASE 419AE−01 ISSUE O SYMBOL D MIN NOM A e E1 MAX 1.00 A1 0.01 0.05 0.10 A2 0.80 0.87 0.90 b 0.30 c 0.12 0.45 0.15 D 2.90 BSC E 2.80 BSC E1 1.60 BSC e 0.95 TYP E L 0.30 L1 0.40 0.20 0.50 0.60 REF L2 0.25 BSC 0º θ 8º TOP VIEW A2 A b q L A1 c L1 SIDE VIEW END VIEW Notes: (1) All dimensions are in millimeters. Angles in degrees. (2) Complies with JEDEC MO-193. http://onsemi.com 6 L2 CAT8836 Table 8. ORDERING INFORMATION Device Nominal Supply Voltage Threshold Level Marking Package Shipping CAT8836E18TD−GT3 1.8 V 1.71 UTYM 3000 / Tape & Reel CAT8836J25TD−GT3 2.5 V 2.25 TSOT−23 (Pb−Free) CAT8836H30TD−GT3 3.0 V 2.79 CAT8836L30TD−GT3 3.0 V 2.64 CAT8836K33TD−GT3 3.3 V 2.93 Example of Ordering Information (Notes 6 − 9) Prefix Device # Suffix CAT 8836 E18 TD −G T3 Company ID (Optional) Product Number 8836 Threshold Voltage E18 = 1.71 V J25 = 2.25 V H30 = 2.79 V L30 = 2.64 V K33 = 2.93 V Package TD: TSOT−23 Lead Finish G: NiPdAu Tape & Reel (Note 10) T: Tape & Reel 3: 3,000 / Reel 6. All packages are RoHS−compliant (Lead−free, Halogen−free). 7. The standard finish is NiPdAu. 8. The device used in the above example is a CAT8836E18TD−GT3 (CAT8836, 1.71 threshold voltage, TSOT−23, NiPdAu, Tape & Reel, 3,000/Reel). 9. For additional detection voltage, package and temperature options, please contact your nearest ON Semiconductor Sales office. 10. 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. 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. 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