TC620/TC621 5V, Dual Trip Point Temperature Sensors Features Package Type • User Programmable Hysteresis and 8-PDIP Temperature Set Point NC 1 8 VDD • Easily Programs with Two External Resistors LOW SET 2 TC620XCPA 7 HIGH LIMIT • Wide Temperature Detection Range: HIGH SET 3 TC620XEPA 6 LOW LIMIT - 0°C to 70°C: (TC620/TC621CCX) GND 4 5 CONTROL - -40°C to +125°C: (TC620/TC621CVX) 8-PDIP - -40°C to +85°C: (TC620/TC621CEX) • Onboard Temperature Sensing Applications THERMISTOR 1 8 VDD (TC620X) HIGH SET 2 TC621XCPA 7 HIGH LIMIT • External NTC Thermistor for Remote Sensing LOW SET 3 TC621XEPA 6 LOW LIMIT Applications (TC621X) GND 4 5 CONTROL • Available in 8-Pin PDIP and SOIC Packages 8-SOIC Applications NC 1 8 VDD LOW SET 2 TC620XCOA 7 LOW LIMIT • Power Supply Over Temperature Detection HIGH SET 3 TC620XEOA 6 HIGH LIMIT • Consumer Equipment TC620CVOA GND 4 5 CONTROL • Temperature Regulators • CPU Thermal Protection 8-SOIC THERMISTOR 1 8 VDD Device Selection Table HIGH SET 2 TC621XCOA 7 HIGH LIMIT TC621XEOA Temperature LOW SET 3 6 LOW LIMIT Part Number Package Range GND 4 5 CONTROL TC620X*COA 8-Pin SOIC 0°C to +70°C General Description TC620X*CPA 8-Pin PDIP 0°C to +70°C The TC620 and TC621 are programmable logic output TC620X*EOA 8-Pin SOIC -40°C to +85°C temperature detectors designed for use in thermal TC620X*EPA 8-Pin PDIP -40°C to +85°C management applications. The TC620 features an TC620C*VOA 8-Pin SOIC -40°C to +125°C onboard temperature sensor, while the TC621 TC621X*COA 8-Pin SOIC 0°C to +70°C connects to an external NTC thermistor for remote sensing applications. TC621X*CPA 8-Pin PDIP 0°C to +70°C Both devices feature dual thermal interrupt outputs TC621X*EOA 8-Pin SOIC -40°C to +85°C (HIGH LIMIT and LOW LIMIT), each of which is pro- TC621X*EPA 8-Pin PDIP -40°C to +85°C grammed with a single external resistor. On the TC620, TC621C*VOA 8-Pin SOIC -40°C to +125°C these outputs are driven active (high) when measured temperature equals the user programmed limits. The Note: *The part code will be C or H (see CONTROL (hysteresis) output is driven high when tem- Functional Block Diagrams). perature equals the high limit setting and returns low when temperature falls below the low limit setting. This output can be used to provide ON/OFF control to a cooling fan or heater. The TC621 provides the same output functions except that the logical states are inverted. The TC620/TC621 are usable over operating temperature ranges of 0°C to 70°C, -40°C to +125°C.  2001-2015 Microchip Technology Inc. DS20001439E-page 1

TC620/TC621 Functional Block Diagrams VDD 8 Temp. to Voltage Converter TC620 4 + 7 2 VREF – LOW LIMIT LOW SET GEN VREF + 6 HIGH LIMIT HIGH SET 3 VREF – GEN R S Q Q 5 CONTROL* VDD 8 Thermistor 1 Interface THERMISTOR Circuit TC621 4 + 7 HIGH LIMIT HIGH SET 2 VREF – GEN VREF + 6 LOW LIMIT LOW SET 3 VREF – GEN R S Q Q 5 CONTROL* *Suffix code "C" denotes cooling option (High true CONTROL output). Suffix code "H" denotes heating option (Low true CONTROL output). DS20001439E-page 2  2001-2015 Microchip Technology Inc.

TC620/TC621 1.0 ELECTRICAL *Stresses above those listed under “Absolute Maxi- CHARACTERISTICS mum 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 Absolute Maximum Ratings* above those indicated in the operation sections of the specifications is not implied. Exposure to Absolute Supply Voltage.......................................................20V Maximum Rating conditions for extended periods may Input Voltage Any Input..(GND – 0.3V) to (V +0.3V) DD affect device reliability. Package Power Dissipation (T  70°C) A PDIP.............................................730 mW SOIC.............................................470 mW Derating Factors: Plastic..........................................8 mW/°C Operating Temperature: V Version.........................-40°C to +125°C E Version...........................-40°C to +85°C C Version..............................0°C to +70°C Storage Temperature.........................-65°C to +150°C TC620/TC621 ELECTRICAL SPECIFICATIONS Electrical Characteristics: T = 25°C, unless otherwise specified. A Symbol Parameter Min. Typ. Max. Unit Test Conditions V Supply Voltage Range 4.5 — 18 V DD I Supply Current — 270 400 A 5V  V  18V DD DD R Output Resistance — 400 1000 W Output High or Low, 5V  V  18V OUT DD I Output Current — — 1 mA Temp. Sensed Source/Sink OUT I Output Current — — 1 mA Cool/Heat Source/Sink OUT T Absolute Accuracy T - 3 T T + 3 °C T = Programmed Temperature ERR TEMPERATURE CHARACTERISTICS Electrical Specifications: Unless otherwise noted, all parameters apply with 4.5V  V  18V. DD Parameters Sym. Min. Typ. Max. Units Conditions Temperature Ranges Specified Temperature Range (C) T 0 — +70 °C A Specified Temperature Range (E) T -40 — +85 °C A Specified Temperature Range (V) T -40 — +125 °C A Maximum Junction Temperature T — — +150 °C J Storage Temperature Range T -65 — +150 °C A Package Thermal Resistances Thermal Resistance, 8L-PDIP  — 125 — °C/W JA Thermal Resistance, 8L-SOIC  — 155 — °C/W JA  2001-2015 Microchip Technology Inc. DS20001439E-page 3

TC620/TC621 2.0 PIN DESCRIPTIONS The descriptions of the pins are listed in Table2-1. TABLE 2-1: TC620 PIN FUNCTION TABLE Pin No. (8-Pin PDIP) Symbol Description (8-Pin SOIC) 1 NC No Internal Connection. 2 LOW SET Low temperature set point. Connect an external 1% resistor from LOW SET to V DD to set trip point. 3 HIGH SET High temperature set point. Connect an external 1% resistor from HIGH SET to V to set trip point. DD 4 GND Ground Terminal. 5 CONTROL Control output. 6 HIGH LIMIT High temperature push/pull output. 7 LOW LIMIT Low temperature push/pull output. 8 V Power supply input. DD TABLE 2-2: TC621 PIN FUNCTION TABLE Pin No. (8-Pin PDIP) Symbol Description (8-Pin SOIC) 1 THERMISTOR Thermistor input. 2 HIGH SET High temperature set point. Connect an external 1% resistor from HIGH SET to V to set trip point. DD 3 LOW SET Low temperature set point. Connect an external 1% resistor from LOW SET to V to set trip point. DD 4 GND Ground Terminal. 5 CONTROL Control output. 6 LOW LIMIT Low temperature push/pull output. 7 HIGH LIMIT High temperature push/pull output. 8 V Power supply input. DD DS20001439E-page 4  2001-2015 Microchip Technology Inc.

TC620/TC621 3.0 DETAILED DESCRIPTION Care must also be taken to ensure the LOW SET temperature setting is at least 5°C lower than the HIGH The TC620 has a positive temperature coefficient tem- SET temperature setting. perature sensor and a dual threshold detector. Tem- Figure3-2 can help the user obtain an estimate of the perature set point programming is accomplished with external resistor values required for the desired LOW external resistors from the HIGH SET and LOW SET SET and HIGH SET trip points. inputs to V The HIGH LIMIT and LOW LIMIT outputs DD. remain low as long as measured temperature is below set point values. As measured temperature increases, 250 the LOW LIMIT output is driven high when temperature equals the LOW SET set point (±3°C max). If tempera- kΩ) 200 ture continues to climb, the HIGH LIMIT output is driven (RIP high when temperature equals the HIGH SET set point E, RT 150 (Figure3-1). The CONTROL (hysteresis) output is NC A latched in its active state at the temperature specified SIST 100 by the HIGH SET resistor. CONTROL is maintained E R active until temperature falls to the value specified by 50 the LOW SET resistor. -55 -35 -15 5 25 45 65 85 105 125 TEMPERATURE (°C) High Set Point FIGURE 3-2: TC620 Sense Resistors vs. Temperature Trip Temperature. Low Set Point Low Limit Output 3.2 Built-in Hysteresis High Limit Output To prevent output “chattering” when measured Control Output (Cool Option temperature is at (or near) the programmed trip point Control Output (Heat Option) values, the LOW SET and HIGH SET inputs each have built-in hysteresis of -2°C below the programmed FIGURE 3-1: TC620/TC621 Input vs. settings (Figure3-3). Output Logic. 3.1 Programming the TC620 The resistor values to achieve the desired trip point Set Point (Set Point 2°C) temperatures on HIGH SET and LOW SET are calculated using Equation3-1: EQUATION 3-1: High Limit or Low Limit R = 0.5997 x T 2.1312 Output TRIP Where: R = Programming resistor in Ohms FIGURE 3-3: Built-In Hysteresis on Low TRIP T = The desired trip point temperature in degrees Limit and High Limit Outputs. Kelvin. As shown, the outputs remain in their active state (hysteresis) until temperature falls an additional 2°C For example, a 50°C setting on either the HIGH SET below the user’s setting. or LOW SET input is calculated using Equation3-2 as follows: EQUATION 3-2: R = 0.5997 x ((50 + 273.15)2.1312) = 133.6 k SET Care must be taken to ensure the LOW SET program- ming resistor is a smaller value than the HIGH SET programming resistor. Failure to do this will result in erroneous operation of the CONTROL output.  2001-2015 Microchip Technology Inc. DS20001439E-page 5

TC620/TC621 3.3 Using the TC621 350 The TC621 operation is similar to that of the TC620, but requires an external NTC thermistor. Use the resis- 300 tance versus temperature curve of the thermistor to 250 determine the values of the programming resistors. Ω) Note that the pin numbers for the HIGH SET and LOW E (k 200 C N SET programming resistors for the TC621 are reversed A T versus that of the TC620 (i.e., the resistor value on SIS 150 E R HIGH SET [Pin 2] should always be lower than the one OR 100 connected to LOW SET [Pin 3]). Also note that the ST MI outputs of the TC621 are LOW TRUE when used with R 50 E H an NTC thermistor. T 0 0 10 20 30 40 50 60 70 3.4 TC621 Thermistor Selection TEMPERATURE (°C) FIGURE 3-4: Typical NTC Thermistor. The TC621 uses an external thermistor to monitor the controlling temperature. A thermistor with a resistance 3.5 TC620/TC621 Outputs value of approximately 100 k at 25°C is recommended. Both devices have complimentary output stages. They A temperature set point is selected by picking a resis- are rated at a source or sink current of 1 mA maximum. tor whose value is equal to the resistance of the therm- istor at the desired temperature. For example, using the data shown in Figure3-4, a 30 k resistor between HIGH TEMP (Pin 2) and V (Pin 8) sets the high DD temperature trip point at +51°C and a 49 k resistor on LOW TEMP (Pin 3) sets the low temperature trip point to +41°C. DS20001439E-page 6  2001-2015 Microchip Technology Inc.

TC620/TC621 4.0 TYPICAL APPLICATIONS 4.2 Temperature Controlled Fan In the application in Figure4-2, a high and a low tem- 4.1 Dual Speed Temperature Control perature is selected by two R and R . The TC620 L H monitors the ambient temperature and turns the FET In Figure4-1, the Dual Speed Temperature Control switch on when the temperature exceeds the HIGH uses a TC620 and a TC4469 quad driver. Two of the TEMP set point. The fan remains on until the tempera- drivers of the TC4469 are configured in a simple oscil- ture decreases to the LOW TEMP set point. This lator. When the temperature is below the LOW TEMP provides the hysteresis. In this application, the fan set point, the output of the driver is OFF. When the tem- turns on only when required. perature exceeds the LOW TEMP set point, the TC4469 gates the oscillator signal to the outputs of the The TC621 uses an external thermistor to monitor the driver. This square wave signal modulates the remain- ambient temperature. This adds one part, but allows ing outputs and drives the motor at a low speed. If this more flexibility with the location of the temperature speed cannot keep the temperature below the HIGH sensor. TEMP set point, then the driver turns on continuously which increases the fan speed to high. The TC620 will monitor the temperature and only allow the fan to oper- ate when needed and at the required speed to maintain the desired temperature. A higher power option can be designed by adding a resistor and a power MOSFET. +12V VMOTOR 0.1 µF 10 µF 1M Fan Motor Low Temp. 8 14 30˚ C High 1N4148 100k 2 6 2 13 3 Limit 1 4 50Ω MOSFET TC620 1 3 6 50 pF High Temp. 1N4148 TC4469 50˚ C 5 Low 7 5 9 Limit 8 10 Higher Power Option 11 4 Temperature Scale 12 0˚ C – 30 ˚ C (Fan Off) 1 µF 10k 7 Fan Motor 30˚ C – 50 ˚ C (Fan Low) 50˚ C – UP (Fan High) FIGURE 4-1: Dual Speed Temperature Control. +12V +12V Thermistor (NTC) Low Temp. 1 8 Fan Motor High 1 8 Fan Motor RL Temp. 2 TC620 7 2 TC621 7 3 6 RH 3 6 RH 4 5 MTP3055E Low Temp. RL 4 5 MTP3055E High Temp. FIGURE 4-2: Temperature Controlled Fan.  2001-2015 Microchip Technology Inc. DS20001439E-page 7

TC620/TC621 4.5V to 18V High Low Temp. Temp. 1 8 1 14 1k 2 7 2 13 TC620 3 6 3 12 TC4469 4 5 4 11 1k High Low 5 10 Temp. Temp. 6 9 Warning Warning 7 8 Heating/Cooling Equipment FIGURE 4-3: Heating and Cooling Application. DS20001439E-page 8  2001-2015 Microchip Technology Inc.

TC620/TC621 5.0 PACKAGING INFORMATION 5.1 Package Marking Information 8-Lead PDIP (300 mil) Example XXXXXXXX TC620C XXXXXNNN CPA e^3^ 256 YYWW 1503 TC621C CPA ^e^3 256 1503 8-Lead SOIC (150 mil) Example TC620HC OA e^3^ 1503 NNN 256 TC621HE OA e^3^ 1503 256 Legend: XX...X Customer-specific information Y Year code (last digit of calendar year) YY Year code (last 2 digits of calendar year) WW Week code (week of January 1 is week ‘01’) NNN Alphanumeric traceability code e3 Pb-free JEDEC® designator for Matte Tin (Sn) * This package is Pb-free. The Pb-free JEDEC designator ( e 3 ) can be found on the outer packaging for this package. Note: In the event the full Microchip part number cannot be marked on one line, it will be carried over to the next line, thus limiting the number of available characters for customer-specific information.  2001-2015 Microchip Technology Inc. DS20001439E-page 9

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TC620/TC621 Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging  2001-2015 Microchip Technology Inc. DS20001439E-page 11

TC620/TC621 Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging DS20001439E-page 12  2001-2015 Microchip Technology Inc.

TC620/TC621 (cid:2)(cid:3)(cid:4)(cid:5)(cid:6)(cid:7)(cid:8)(cid:9)(cid:10)(cid:6)(cid:11)(cid:12)(cid:13)(cid:14)(cid:8)"(cid:25)(cid:6)(cid:10)(cid:10)(cid:8)#(cid:16)(cid:12)(cid:10)(cid:13)(cid:18)(cid:5)(cid:8)(cid:19)#(cid:20)(cid:21)(cid:8)(cid:22)(cid:8)(cid:31)(cid:6)$$(cid:27)%&(cid:8)(cid:23)’((cid:24)(cid:8)(cid:25)(cid:25)(cid:8)(cid:26)(cid:27)(cid:7)(cid:28)(cid:8)(cid:29)"#(cid:17))(cid:30) (cid:31)(cid:27)(cid:12)(cid:5)! ;(cid:22)(cid:21)(cid:14)’(cid:23)(cid:13)(cid:14)*(cid:22)"’(cid:14)(cid:20)#(cid:21)(cid:21)(cid:13)(cid:25)’(cid:14)(cid:10)(cid:11)(cid:20)<(cid:11)(cid:12)(cid:13)(cid:14)$(cid:21)(cid:11).(cid:19)(cid:25)(cid:12)"+(cid:14)(cid:10)(cid:26)(cid:13)(cid:11)"(cid:13)(cid:14)"(cid:13)(cid:13)(cid:14)’(cid:23)(cid:13)(cid:14)(cid:18)(cid:19)(cid:20)(cid:21)(cid:22)(cid:20)(cid:23)(cid:19)(cid:10)(cid:14)(cid:31)(cid:11)(cid:20)<(cid:11)(cid:12)(cid:19)(cid:25)(cid:12)(cid:14)(cid:3)(cid:10)(cid:13)(cid:20)(cid:19)&(cid:19)(cid:20)(cid:11)’(cid:19)(cid:22)(cid:25)(cid:14)(cid:26)(cid:22)(cid:20)(cid:11)’(cid:13)$(cid:14)(cid:11)’(cid:14) (cid:23)’’(cid:10):==...(cid:29)*(cid:19)(cid:20)(cid:21)(cid:22)(cid:20)(cid:23)(cid:19)(cid:10)(cid:29)(cid:20)(cid:22)*=(cid:10)(cid:11)(cid:20)<(cid:11)(cid:12)(cid:19)(cid:25)(cid:12)  2001-2015 Microchip Technology Inc. DS20001439E-page 13

TC620/TC621 NOTES: DS20001439E-page 14  2001-2015 Microchip Technology Inc.

TC620/TC621 APPENDIX A: REVISION HISTORY Revision E (February 2015) 1. Removed the -55°C to 125°C temperature range reference on page 1. 2. Removed the M version temperature range from page 3 (-55°C to 125°C). 3. Added the Temperature Characteristics table. 4. Added Section5.0 “Packaging Information”. 5. Added the Product Identification System section. Revision D (December 2012) 1. Added a note to each package outline drawing.  2001-2015 Microchip Technology Inc. DS20001439E-page 15

TC620/TC621 NOTES: DS20001439E-page 16  2001-2015 Microchip Technology Inc.

TC620/TC621 PRODUCT IDENTIFICATION SYSTEM To order or obtain information, e.g., on pricing or delivery, refer to the factory or the listed sales office. PART NO. X X XX XXX X Examples: a) TC620CCOA: 5V Dual Trip Point Device Cooling/ Temperature PackageTape & Reel PB Free Temp sensor, Heating Range Cooling option, 0°C to +70°C SOIC package Device: TC620: 5V, Dual Trip Point Temperature Sensors TC621: 5V, Dual Trip Point Temperature Sensors b) TC620CEPA: 5V Dual Trip Point Temp sensor, Cooling option, Cooling/Heating C = Cooling Option -40°C to +85°C Option: H = Heating Option PDIP package. c) TC620CVPA: 5V Dual Trip Point Temperature Range: C = 0°C to +70°C (PDIP and SOIC only) Temp sensor, E = -40°C to +85°C Cooling option, V = -40°C to +125°C -40°C to +125°C PDIP package. Package: OA = Plastic SOIC, (150 mil Body), 8-lead d) TC620HCOA: 5V Dual Trip Point OA713 = Plastic SOIC, (150 mil Body), 8-lead Temp sensor, (Tape and Reel) PA = Plastic DIP (300 mil Body), 8-lead Heating option, 0°C to +70°C SOIC package e) TC621HEPA: 5V Dual Trip Point Temp sensor, Heating option, -40°C to +85°C PDIP package. f) TC620CCOA713: 5V Dual Trip Point Temp sensor, Cooling option, 0°C to +70°C SOIC package. g) TC621HCOA713: 5V Dual Trip Point Temp sensor, Heating option, 0°C to +70°C SOIC package.  2001-2015 Microchip Technology Inc. DS20001439E-page 17

TC620/TC621 NOTES: DS20001439E-page 18  2001-2015 Microchip Technology Inc.

Note the following details of the code protection feature on Microchip devices: • Microchip products meet the specification contained in their particular Microchip Data Sheet. • Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the intended manner and under normal conditions. • There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip’s Data Sheets. Most likely, the person doing so is engaged in theft of intellectual property. • Microchip is willing to work with the customer who is concerned about the integrity of their code. • Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not mean that we are guaranteeing the product as “unbreakable.” Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our products. Attempts to break Microchip’s code protection feature may be a violation of the Digital Millennium Copyright Act. If such acts allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act. Information contained in this publication regarding device Trademarks applications and the like is provided only for your convenience The Microchip name and logo, the Microchip logo, dsPIC, and may be superseded by updates. It is your responsibility to FlashFlex, flexPWR, JukeBlox, KEELOQ, KEELOQ logo, Kleer, ensure that your application meets with your specifications. LANCheck, MediaLB, MOST, MOST logo, MPLAB, MICROCHIP MAKES NO REPRESENTATIONS OR OptoLyzer, PIC, PICSTART, PIC32 logo, RightTouch, SpyNIC, WARRANTIES OF ANY KIND WHETHER EXPRESS OR SST, SST Logo, SuperFlash and UNI/O are registered IMPLIED, WRITTEN OR ORAL, STATUTORY OR trademarks of Microchip Technology Incorporated in the OTHERWISE, RELATED TO THE INFORMATION, U.S.A. and other countries. INCLUDING BUT NOT LIMITED TO ITS CONDITION, QUALITY, PERFORMANCE, MERCHANTABILITY OR The Embedded Control Solutions Company and mTouch are FITNESS FOR PURPOSE. Microchip disclaims all liability registered trademarks of Microchip Technology Incorporated arising from this information and its use. Use of Microchip in the U.S.A. devices in life support and/or safety applications is entirely at Analog-for-the-Digital Age, BodyCom, chipKIT, chipKIT logo, the buyer’s risk, and the buyer agrees to defend, indemnify and CodeGuard, dsPICDEM, dsPICDEM.net, ECAN, In-Circuit hold harmless Microchip from any and all damages, claims, Serial Programming, ICSP, Inter-Chip Connectivity, KleerNet, suits, or expenses resulting from such use. No licenses are KleerNet logo, MiWi, MPASM, MPF, MPLAB Certified logo, conveyed, implicitly or otherwise, under any Microchip MPLIB, MPLINK, MultiTRAK, NetDetach, Omniscient Code intellectual property rights. Generation, PICDEM, PICDEM.net, PICkit, PICtail, RightTouch logo, REAL ICE, SQI, Serial Quad I/O, Total Endurance, TSHARC, USBCheck, VariSense, ViewSpan, WiperLock, Wireless DNA, and ZENA are trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. SQTP is a service mark of Microchip Technology Incorporated in the U.S.A. Silicon Storage Technology is a registered trademark of Microchip Technology Inc. in other countries. GestIC is a registered trademarks of Microchip Technology Germany II GmbH & Co. KG, a subsidiary of Microchip Technology Inc., in other countries. All other trademarks mentioned herein are property of their respective companies. © 2001-2015, Microchip Technology Incorporated, Printed in the U.S.A., All Rights Reserved. ISBN: 978-1-63277-119-3 QUALITY MANAGEMENT SYSTEM Microchip received ISO/TS-16949:2009 certification for its worldwide headquarters, design and wafer fabrication facilities in Chandler and CERTIFIED BY DNV Tempe, Arizona; Gresham, Oregon and design centers in California and India. The Company’s quality system processes and procedures == ISO/TS 16949 == are for its PIC® MCUs and dsPIC® DSCs, KEELOQ® code hopping devices, Serial EEPROMs, microperipherals, nonvolatile memory and analog products. In addition, Microchip’s quality system for the design and manufacture of development systems is ISO 9001:2000 certified.  2001-2015 Microchip Technology Inc. DS20001439E-page 19

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