TC51 Series 1A VOLTAGE DETECTOR WITH OUTPUT DELAY FEATURES GENERAL DESCRIPTION Precise Detection Thresholds .................... 2.0% Small Package ................................. 3-Pin SOT-23A Low Supply Current .................................. Typ. 1A Wide Detection Range .......................... 1.6V to 6.0V Wide Operating Voltage Range ............ 0.7V to 10V Built-in Delay Circuit ............. 50msec to 200 msec Open-Drain Output APPLICATIONS Battery Voltage Monitoring Microprocessor Reset System Brownout Protection PIN CONFIGURATIONS 3-Pin SOT-23A** VIN The TC51 is a very low power, open drain output, CMOS voltage detector with built-in delay. It is particularly wellsuited for battery powered applications because of its extremely low 1 A operating current and small surface-mount packaging. Each part is laser-trimmed to the desired threshold voltage, which can be specified from 1.6V to 6.0V in 0.1V steps. The standard built-in output delay is 50 msec - 200 msec. The device includes a comparator, low-current highprecision reference, laser-programmed voltage divider, hysteresis circuit, and output driver with digital delay timer. In operation, the TC51's output (VOUT) remains in the logic HIGH state as long as VIN is greater than the - specified threshold voltage (VDET ). When VIN falls below - VDET, the output is immediately driven to a logic LOW. - VOUT remains LOW until V IN rises above VDET by an amount VHYST, whereupon it returns to a logic HIGH after expiration of the built-in delay time. 3 ORDERING INFORMATION PART CODE TC51 1 N 18 0 2 E CB XX Output Configuration: N = Open Drain 2 VOUT TC51 VSS Detected Voltage*: Ex: 18 = 1.8V ** 3-Pin SOT-23A is equivalent to EIAJ SC-59. Output Delay: 0 = 50msec - 200msec (standard) Tolerance: 2 = 2% FUNCTIONAL BLOCK DIAGRAM Temperature: E: - 40C to + 85C VIN VOUT Delay Circuit VREF Package Type and Pin Count: CB: 3-Pin SOT-23A** Taping Direction: TR: Standard Taping RT: Reverse Taping *Other voltages are available. Please contact Microchip Technology Inc. for details. VSS (c) 2001 Microchip Technology Inc. DS21429A TC51-1 7/22/99 1A VOLTAGE DETECTOR WITH OUTPUT DELAY TC51 Series *Static-sensitive device. Unused devices must be stored in conductive material. Protect devices from static discharge and static fields. 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 above those indicated in the operational sections of the specifications is not implied. Exposure to Absolute Maximum Rating Conditions for extended periods may affect device reliability. ABSOLUTE MAXIMUM RATINGS* Supply Voltage VIN ......................................................12V Output Voltage: Open-Drain ................. (VSS - 0.3) to 12V Output Current ........................................................50 mA Power Dissipation: (TA 70C) 3-Pin SOT-23A .............................................. 240 mW Operating Temperature .......................... - 40C to + 85C Storage Temperature ........................... - 65C to + 150C Soldering Temperature (10 sec) ............................. 300C ELECTRICAL CHARACTERISTICS: TA = 25C, unless otherwise specified. Symbol Parameter Test Conditions VIN ISS Operating Voltage Quiescent Current - VDET - VDET Threshold Voltage VHYST Hysteresis Voltage IOUT Output Current VOL = 0.5V TDLY - TC (VDET ) Delay Time - Tempco of (VDET ) Standard - 40C TA 85C = 1.6 to 6.0V VIN = 1.5V 2.0V 3.0V 4.0V 5.0V Note 1 VIN = 1.0V 2.0V 3.0V 4.0V 5.0V Min Typ Max Unit 0.7 -- -- -- -- -- (VT) x 0.98 - (VDET ) x 0.02 -- -- -- 0.9 1.0 1.3 1.6 2.0 VT 0.5% 10.0 2.6 3.0 3.4 3.8 4.2 (VT) x 1.02 - (VDET ) x 0.08 -- -- V A 200 -- msec ppm/C 50 -- - (VDET ) x 0.05 2.2 7.7 10.1 11.5 13.0 -- 100 V V mA NOTE : 1. VT is the factory programmed threshold voltage setting. PIN DESCRIPTION 3-Pin SOT-23A Pin No. 1 Symbol VOUT 2 3 VSS VIN TC51-1 7/22/99 Description Digital Output. This output goes low when VIN drops below VDET and returns high when VIN rises above VDET + VHYST. (See timing chart.) Ground Terminal. Analog Input. This pin is both the power supply input and the voltage to be monitored. 2 (c) 2001 Microchip Technology Inc. DS21429A 1A VOLTAGE DETECTOR WITH OUTPUT DELAY TC51 Series + VDET VIN VHYST - DETECT VOLTAGE VDET VOUT, stays valid until the input voltage falls below the Minimum Operating Voltage, VIN(MIN), of 0.7V. Below this minimum operating voltage, the output is undefined. During power-up or anytime VIN has fallen below VIN(MIN), VOUT will remain undefined until VIN rises above VIN(MIN), at which time the output will become valid. VOUT will be in its active low + - state while VIN(MIN) < VIN < V+DET. (VDET = VDET + VHYST). If + and when the input rises above VDET, the output will assume its inactive state after Delay Time (TDLY). RELEASE VOLTAGE MINIMUM OPERATING VOLTAGE GROUND LEVEL VOUT OUTPUT VOLTAGE DELAY TIME (TDLY) APPLICATIONS Processor RESET Supervisor Figure 2 shows the TC51 used as a processor reset supervisor. Because the TC51 is available in threshold settings of 1.6V to 6.0V in 100mV steps, the user can choose the reset single threshold setting best suited to the system power supply voltage at hand (please see Application Note #36). Also, the 1A supply current is significantly lower than its nearest competitor. As shown in the timing diagram (Figure 1),VOUT is + guaranteed low for voltages between 0.7V and VDET .The TC51 activates its on-board delay timer once the power + supply voltage is within tolerance (i.e. greater than VDET ). VOUT is released after delay time (TDLY). Should the power supply voltage momentarily dip ("brown-out" condition), the TC51 immediately drives and holds the processor RESET input low. RESET is released after the power supply voltage is again within tolerance, and after the delay timer expires. RESET is driven and held low when power fails (power-off or "blackout"), and is maintained low to a guaranteed supply voltage down to 0.7V. GROUND LEVEL Figure 1. Timing Chart DETAILED DESCRIPTION Please refer to Figure 1. In normal steady-state opera- tion, when VIN > VDET , the output is high. If and when the - , the output pulls down (Logic 0) to V . input falls below VDET SS Generally, VOUT can pull down to within 0.5V of VSS at rated output current and input voltage, (See the Electrical Characteristics section). VDD VDD PROCESSOR R1 47K VOUT RESET TC51 GND Figure 2. Processor Reset Supervisor POWERUP NOMINAL POWER SUPPLY VOLTAGE BROWN OUT STEADY STATE OPERATION POWER DOWN THRESHOLD VOLTAGE (V--DET, V+DFT) 0.7V TIME VOH TC51 OUTPUT VOL TDLY TDLY Figure 3. TC51 Operation During Power-Up, Brown-Out and Power Down. (c) 2001 Microchip Technology Inc. DS21429A 3 TC51-1 7/22/99 1A VOLTAGE DETECTOR WITH OUTPUT DELAY TC51 Series TYPICAL CHARACTERISTICS 1. SUPPLY CURRENT VS. INPUT VOLTAGE TC51N2502 TC51N1602 3.0 2.0 -30C TA = 80C 25C 1.0 4.0 SUPPLY CURRENT ISS (A) SUPPLY CURRENT ISS (A) SUPPLY CURRENT ISS (A) TC51N3502 4.0 4.0 3.0 2.0 -30C TA = 80C 1.0 25C 0.0 0.0 0 2 4 6 8 2.0 TA = 80C -30C 1.0 25C 0.0 0 10 3.0 INPUT VOLTAGE (VIN) (V) 2 8 4 6 INPUT VOLTAGE (VIN) 0 10 2 8 4 6 INPUT VOLTAGE (VIN) 10 2. THRESHOLD VOLTAGE, HYSTERESIS VOLTAGE VS. AMBIENT TEMPERATURE V- DET 1.6 1.5 1.4 -40 -20 0 20 60 80 40 AMBIENT TEMPERATURE TA (C) 2.8 2.7 VHYST 2.6 V- DET 2.5 2.4 2.3 -40 -20 0 20 60 40 80 AMBIENT TEMPERATURE TA (C) THRESHOLD HYSTERESIS VOLTAGE V-DET ,VHYST VHYST THRESHOLD HYSTERESIS VOLTAGE V-DET ,VHYST THRESHOLD HYSTERESIS VOLTAGE V-DET ,VHYST 1.8 1.7 TC51N3502 TC51N2502 TC51N1602 3.8 3.7 VHYST 3.6 V- DET 3.5 3.4 3.3 3.2 -40 -20 0 20 60 40 80 AMBIENT TEMPERATURE TA (C) 3. OUTPUT VOLTAGE VS. INPUT VOLTAGE TC51N1602 TC51N2502 4 2.5 = 25C = 80C 2.0 1.5 1.0 0.5 0.0 TC51N3502 5 VIN - VOUT: 100k TA = 30C OUTPUT VOLTAGE VOUT (V) VIN - VOUT: 100k TA = 30C OUTPUT VOLTAGE VOUT (V) OUTPUT VOLTAGE VOUT (V) 3.0 = 25C = 80C 3 2 1 0 0 TC51-1 7/22/99 1 2 INPUT VOLTAGE VIN (V) 3 VIN - VOUT: 100k TA = 30C = 25C = 80C 4 3 2 1 0 0 1 2 3 INPUT VOLTAGE VIN (V) 4 4 0 1 2 3 4 5 INPUT VOLTAGE VIN (V) (c) 2001 Microchip Technology Inc. DS21429A 1A VOLTAGE DETECTOR WITH OUTPUT DELAY TC51 Series TYPICAL CHARACTERISTICS (CONT.) 4. OUTPUT CURRENT VS. VDS TC51N1602 TC51N1602 1400 TA = 25C OUTPUT CURRENT IOUT (A) OUTPUT CURRENT IOUT (mA) 15.0 12.5 VIN = 1.5V 10.0 7.5 5.0 1.0V 2.5 0.0 0.0 TA = 25C 1000 0.7V 800 600 400 200 0.5 1.0 1.5 2.0 0 0.2 VDS (V) OUTPUT CURRENT IOUT (A) OUTPUT CURRENT IOUT (mA) TA = 25C VIN = 2.0V 20 15 1.5V 10 5 0 0.0 0.5 1.0 1.5 2.0 800 600 200 0 0.0 2.5 0.7V 400 0.2 OUTPUT CURRENT IOUT (A) OUTPUT CURRENT IOUT (mA) 2.5V 30 2.0V 20 1.5V 10 0 0 0.5 1.0 1.5 2.0 2.5 DS21429A 0.8 1.0 5 TA = 25C VIN = 0.8V 1200 1000 800 0.7V 600 400 200 0.0 3.0 3.5 VDS (V) (c) 2001 Microchip Technology Inc. 0.6 TC51N3502 VIN = 3.0V 40 0.4 VDS (V) 1400 50 1.0 VIN = 0.8V 1000 TC51N3502 TA = 25C 0.8 TA = 25C VDS (V) 60 0.6 TC51N2502 1200 25 0.4 VDS (V) TC51N2502 30 VIN = 0.8V 1200 0.2 0.4 0.6 VDS (V) 0.8 1.0 TC51-1 7/22/99 1A VOLTAGE DETECTOR WITH OUTPUT DELAY TC51 Series TYPICAL CHARACTERISTICS (CONT.) 5. OUTPUT CURRENT VS. INPUT VOLTAGE TC51N1602 25 VDS = 0.5V VDS = 0.5V TA = 30C OUTPUT CURRENT IOUT (mA) OUTPUT CURRENT IOUT (mA) 15.0 TC51N2502 12.5 25C 10.0 7.5 5.0 80C 2.5 0.0 0.0 0.5 1.0 1.5 15 INPUT VOLTAGE VIN (V) 25C 10 80C 5 0 0.0 2.0 TA = 30C 20 0.5 1.0 1.5 2.0 2.5 INPUT VOLTAGE VIN (V) 3.0 TC51N3502 OUTPUT CURRENT IOUT (mA) 40 VDS = 0.5V 35 TA = 30C 30 25C 25 20 15 80C 10 5 0 0 TC51-1 7/22/99 1.0 2.0 3.0 INPUT VOLTAGE VIN (V) 4.0 6 (c) 2001 Microchip Technology Inc. DS21429A 1A VOLTAGE DETECTOR WITH OUTPUT DELAY TC51 Series represents 1st decimal point of output voltage MARKINGS 3-Pin SOT-23A Symbol 0 1 2 3 4 3 Voltage .0 .1 .2 .3 .4 Symbol 5 6 7 8 9 Voltage .5 .6 .7 .8 .9 represents delay time represents N-channel indication & integer part of output voltage Symbol K L M N P R S Output Nch Nch Nch Nch Nch Nch Nch Symbol 5 Delay Time 50 ms ~ 200 ms represents assembly lot code Voltage 0. 1. 2. 3. 4. 5. 6. TAPING FORM Component Taping Orientation for 3-Pin SOT-23A (EIAJ SC-59) Devices PIN 1 User Direction of Feed User Direction of Feed Device Marking Device Marking W PIN 1 P Standard Reel Component Orientation for TR Suffix Device (Mark Right Side Up) Reverse Reel Component Orientation for RT Suffix Device (Mark Upside Down) Carrier Tape, Number of Components Per Reel and Reel Size Package 3-Pin SOT-23A Carrier Width (W) Pitch (P) Part Per Full Reel Reel Size 8 mm 4 mm 3000 7 in Tape and Reel Specifications Table Package 3-Pin SOT-23A (c) 2001 Microchip Technology Inc. DS21429A Carrier Width (W) Pitch (P) 8 mm 4 mm 7 Part Per Full Reel 3000 Reel Size 7 TC51-1 7/22/99 1A VOLTAGE DETECTOR WITH OUTPUT DELAY TC51 Series PACKAGE DIMENSIONS 3-Pin SOT-23A (EIAJ SC-59) .020 (0.50) .012 (0.30) .071 (1.80) .055 (1.40) .118 (3.00) .098 (2.50) PIN 1 .075 (1.90) REF. .122 (3.10) .106 (2.70) .051 (1.30) .035 (0.90) .006 (0.15) .000 (0.00) .022 (0.55) .014 (0.35) *NOTE: SOT-23A-3 is equivalent to EIAJ (SC-59) TC51-1 7/22/99 .010 (0.25) .004 (0.09) 10 MAX. Dimensions: inches (mm) 8 (c) 2001 Microchip Technology Inc. DS21429A 1A VOLTAGE DETECTOR WITH OUTPUT DELAY TC51 Series WORLDWIDE SALES AND SERVICE AMERICAS New York Corporate Office 150 Motor Parkway, Suite 202 Hauppauge, NY 11788 Tel: 631-273-5305 Fax: 631-273-5335 2355 West Chandler Blvd. Chandler, AZ 85224-6199 Tel: 480-792-7200 Fax: 480-792-7277 Technical Support: 480-792-7627 Web Address: http://www.microchip.com Rocky Mountain 2355 West Chandler Blvd. Chandler, AZ 85224-6199 Tel: 480-792-7966 Fax: 480-792-7456 ASIA/PACIFIC (continued) San Jose Microchip Technology Inc. 2107 North First Street, Suite 590 San Jose, CA 95131 Tel: 408-436-7950 Fax: 408-436-7955 Singapore Microchip Technology Singapore Pte Ltd. 200 Middle Road #07-02 Prime Centre Singapore, 188980 Tel: 65-334-8870 Fax: 65-334-8850 Taiwan Atlanta 6285 Northam Drive, Suite 108 Mississauga, Ontario L4V 1X5, Canada Tel: 905-673-0699 Fax: 905-673-6509 500 Sugar Mill Road, Suite 200B Atlanta, GA 30350 Tel: 770-640-0034 Fax: 770-640-0307 Microchip Technology Taiwan 11F-3, No. 207 Tung Hua North Road Taipei, 105, Taiwan Tel: 886-2-2717-7175 Fax: 886-2-2545-0139 ASIA/PACIFIC Austin EUROPE China - Beijing Australia Analog Product Sales 8303 MoPac Expressway North Suite A-201 Austin, TX 78759 Tel: 512-345-2030 Fax: 512-345-6085 Boston 2 Lan Drive, Suite 120 Westford, MA 01886 Tel: 978-692-3848 Fax: 978-692-3821 Boston Analog Product Sales Unit A-8-1 Millbrook Tarry Condominium 97 Lowell Road Concord, MA 01742 Tel: 978-371-6400 Fax: 978-371-0050 Toronto Microchip Technology Beijing Office Unit 915 New China Hong Kong Manhattan Bldg. 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No licenses are conveyed, implicitly or otherwise, except as maybe explicitly expressed herein, under any intellectual property rights. The Microchip logo and name are registered trademarks of Microchip Technology Inc. in the U.S.A. and other countries. All rights reserved. All other trademarks mentioned herein are the property of their respective companies. (c) 2001 Microchip Technology Inc. DS21429A 9 TC51-1 7/22/99