TC51 MICROCHIP | Alldatasheet
Document overview
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Technical content
Features
- Precise Detection Thresholds: ±2.0% Small Package: 3-Pin SOT-23A Low Supply Current: Typ. 1 µA 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 Brown-out Protection Device Selection Table Other output voltages are available. Please contact Microchip Technology Inc. for details. Package Type General Description The TC51 is a very low power, open drain output, CMOS voltage detector with built-in delay. It is particularly well-suited for battery powered applications because of its extremely low 1µA 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. The standard built-in output delay is 50msec-200msec. The device includes a comparator, low-current high- precision reference, laser-programmed voltage divider, hysteresis circuit and output driver with digital delay timer. In operation, the TC51’s output (V OUT) remains in the logic HIGH state as long as V IN is greater than the specified threshold voltage (V DET -). When V IN falls below VDET -, the output is immediately driven to a logic LOW. VOUT remains LOW until VIN rises above VDET - by an amount V HYST, whereupon it returns to a logic HIGH after expiration of the built-in delay time. Functional Block Diagram Part Number Package Temp. Range TC51-xxxxxxxxxx 3-Pin SOT-23A -40°C to +85°C VIN VOUT VSS TC51 1 2 3-Pin SOT-23A NOTE: 3-Pin SOT-23A is equivalent to the EIAJ SC-59. VIN VSS VOUT VREF Delay Circuit 1µA Voltage Detector with Output Delay
DS21429B-page 2 2002 Microchip Technology Inc.
1.0 ELECTRICAL
Absolute Maximum Ratings* Power Dissipation (TA ≤ 70°C): *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 operation sections of the specifications is not implied. Exposure to Absolute Maximum Rating conditions for extended periods may affect device reliability. TC51 ELECTRICAL SPECIFICATIONS Electrical Characteristics: TA = 25°C, unless otherwise specified. Symbol Parameter Min Typ Max Units Test Conditions VIN Operating Voltage 0.7 — 10.0 V (V DET -) = 1.6 to 6.0V ISS Quiescent Current — 0.9 1.0 1.3 1.6 2.0 2.6 3.0 3.4 3.8 4.2 µAV IN = 1.5V VIN = 2.0V VIN = 3.0V VIN = 4.0V VIN = 5.0V VDET - Threshold Voltage V T x 0.98 V T ± 0.5% V T x 1.02 V Note 1 VHYST Hysteresis Voltage V DET - x 0.02 V DET - x 0.05 V DET - x 0.08 V IOUT Output Current — 2.2 7.7 10.1 11.5 13.0 mA V OL = 0.5V, VIN = 1.0V VIN = 2.0V VIN = 3.0V VIN = 4.0V VIN = 5.0V TDLY Delay Time 50 — 200 msec Standard TC (VDET -) Tempco of (V DET -) — ±100 — ppm/°C- 4 0 °C ≤ TA ≤ 85°C Note 1: VT is the factory programmed threshold voltage setting.
2002 Microchip Technology Inc. DS21429B-page 3 TC51
2.0 PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 2-1. TABLE 2-1: PIN FUNCTION TABLE Pin No. (3-Pin SOT-23A) Symbol Description 1V OUT Digital output. This output goes low when V IN drops below VDET - and returns high when VIN rises above VDET - + VHYST. (See Figure 3-1, Timing Diagram). 2V SS Ground terminal. 3V IN Analog input. This pin is both the power supply input and the voltage to be monitored.
DS21429B-page 4 2002 Microchip Technology Inc.
3.0 DETAILED DESCRIPTION
In normal steady-state operation, when V IN > V DET -, the output is high, see Figure 3-1. If and when the input falls below V DET -, the output pulls down (Logic 0) to VSS. Generally, VOUT can pull down to within 0.5V of VSS at rated output current and input voltage. (Also see Section 1.0, Electrical Characteristics). The output, VOUT, stays valid until the input voltage falls below the minimum operating voltage, V INMIN, of 0.7V. Below this minimum operating voltage, the output is undefined. During power-up or anytime V IN has fallen below VINMIN, VOUT will remain undefined until VIN rises above VINMIN, at which time the output becomes valid. VOUT is maintained in its active low state while VINMIN <V IN < VDET+. (VDET+ = VDET - + VHYST). If and when the input rises above V DET+, the output will assume its inactive state after Delay Time (TDLY). FIGURE 3-1: TIMING DIAGRAM VIN Detect Voltage VDET- Minimum Operating Voltage VHYST VDET+ Output Voltage Release Voltage Ground Level Ground Level Delay Time (TDLY) VOUT
2002 Microchip Technology Inc. DS21429B-page 5 TC51
4.0 APPLICATIONS INFORMATION
4.1 Processor RESET Supervisor
Figure 4-1 shows the TC51 used as a processor reset supervisor. Because the TC51 is available in threshold settings of 1.6V to 6.0V, the user can choose the reset single threshold setting best suited to the system power supply voltage at hand. Also, the 1µA supply current is significantly lower than its nearest competitor. As shown in the timing diagram (Figure 3-1),V OUT is low for voltages between 0.7V and V DET+. 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 down low to a supply voltage of 0.7V. FIGURE 4-1: PROCESSOR RESET SUPERVISOR FIGURE 4-2: TC51 OPERATION DURING POWER-UP, BROWN-OUT AND POWER DOWN TC51 VOUT GND VDD VDD Processor RESET 47K 0.7V Power-Up Steady State Operation TDL Y Time TDL Y Brown-Out Power Down Nominal Power Supply Voltage Threshold Voltage (VDET-, VDET+) VOH TC51 Output VOL
DS21429B-page 6 2002 Microchip Technology Inc.
5.0 TYPICAL CHARACTERISTICS
Note: The graphs and tables provided following this note are a statistical summary based on a limited number of samples and are provided for informational purposes only. The performance characteristics listed herein are not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified operating range (e.g., outside specified power supply range) and therefore outside the warranted range. 4.0 3.0 1.0 0.0 02 4 68 1 0 INPUT VOLTAGE VIN (V) TA = 80°C -30°C -30°C -30°C 25°C 2.0 TC51N1602 1. SUPPLY CURRENT VS. INPUT VOLTAGE SUPPLY CURRENT ISS (µA) 4.0 3.0 1.0 0.0 02 46 8 10 INPUT VOLTAGE VIN (V) 2.0 TC51N2502 SUPPLY CURRENT ISS (µA) 25°C 25°C 4.0 3.0 1.0 0.0 02 46 8 10 INPUT VOLTAGE VIN (V) 2.0 TC51N3502 SUPPLY CURRENT ISS (µA) TA = 80°C TA = 80°C 1.8 1.7 1.5 1.4 -40 -20 0 20 40 60 80 AMBIENT TEMPERATURE TA (°C) 1.6 TC51N1602 2. THRESHOLD VOLTAGE, HYSTERESIS VOLTAGE VS. AMBIENT TEMPERATURE THRESHOLD HYSTERESIS VOLTAGE VDET– ,VHYST VHYST 2.8 2.7 2.5 2.4 2.3 -40 -20 0 20 40 60 AMBIENT TEMPERATURE TA (°C) 2.6 TC51N2502 THRESHOLD HYSTERESIS VOLTAGE VDET– ,VHYST VHYST 3.8 3.7 3.5 3.4 3.3 3.2 -40 -20 0 20 40 60 AMBIENT TEMPERATURE TA (°C) 3.6 TC51N3502 THRESHOLD HYSTERESIS VOLTAGE VDET– ,VHYST VDET– VDET– VDET– VHYST 3.0 2.5 1.5 1.0 0.5 0.0 0 1 2 3 INPUT VOLTAGE V IN (V) 2.0 TC51N1602 3. OUTPUT VOLTAGE VS. INPUT VOLTAGE OUTPUT VOLTAGE VOUT (V) VIN – VOUT: 100k TA = 30°C = 25°C = 80°C 0 12 34 INPUT VOLTAGE VIN (V) TC51N2502 OUTPUT VOLTAGE VOUT (V) VIN – VOUT: 100k TA = 30°C = 25°C = 80°C 4 0 12 345 INPUT VOLTAGE VIN (V) TC51N3502 OUTPUT VOLTAGE VOUT (V) VIN – VOUT: 100k TA = 30°C = 25°C = 80°C
2002 Microchip Technology Inc. DS21429B-page 7 TC51
5.0 TYPICAL CHARACTERISTICS (CONTINUED)
15.0 12.5 7.5 5.0 2.5 0.0 VDS (V) 10.0 TC51N1602 4. OUTPUT CURRENT VS. VDS OUTPUT CURRENT IOUT (mA) TA = 25°C VIN = 1.5V 1.0V 1400 1200 800 600 400 200 VDS (V) 1000 TC51N1602 OUTPUT CURRENT IOUT (µA) TA = 25°C VIN = 0.8V 0.7V VDS (V) TC51N2502 OUTPUT CURRENT IOUT (mA) TA = 25°C VIN = 2.0V 1.5V 1200 1000 600 400 200 VDS (V) 800 TC51N2502 OUTPUT CURRENT IOUT (µA) TA = 25°C VIN = 0.8V 0.7V VDS (V) TC51N3502 OUTPUT CURRENT IOUT (mA) TA = 25°C VIN = 3.0V VIN = 0.8V 2.5V 0.7V2.0V 1.5V 1400 1200 800 600 400 200 VDS (V) 1000 TC51N3502 OUTPUT CURRENT IOUT (µA) TA = 25°C
DS21429B-page 8 2002 Microchip Technology Inc. 15.0 12.5 7.5 5.0 2.5 0.0 INPUT VOLTAGE VIN (V) 10.0 TC51N1602 5. OUTPUT CURRENT VS. INPUT VOLTAGE OUTPUT CURRENT IOUT (mA) VDS = 0.5V TA = 30°C 25°C 80°C 80°C 25°C 25°C 0 1.0 2.0 3.0 4.0 INPUT VOLTAGE VIN (V) TC51N3502 OUTPUT CURRENT IOUT (mA) INPUT VOLTAGE VIN (V) TC51N2502 OUTPUT CURRENT IOUT (mA) TA = 30°C VDS = 0.5V VDS = 0.5V 80°C TA °C
2002 Microchip Technology Inc. DS21429B-page 9 TC51
6.0 PACKAGING INFORMATION
6.1 Package Marking Information
6.2 Taping Form
KN c h0 . LN c h 1 . MN c h2 . NN c h3 . PN c h4 . RN c h5 . SN c h6 . 1 represents N-channel indication and integer part of output voltage Symbol Voltage 0. 0 1. 1 2. 2 3. 3 4. 4 5. 5 6. 6 7. 7 8. 8 9. 9 Symbol Delay Time 5 50ms-200ms 2 represents first decimal of output voltage 3 represents delay time 4 represents assembly lot code Component Taping Orientation for 3-Pin SOT-23A (EIAJ SC-59) Devices Package Carrier Width (W) Pitch (P) Part Per Full Reel Reel Size 3-Pin SOT-23A 8 mm 4 mm 3000 7 in Carrier Tape, Number of Components Per Reel and Reel Size User Direction of Feed Device Marking PIN 1 Standard Reel Component Orientation for TR Suffix Device (Mark Right Side Up) W P
DS21429B-page 10 2002 Microchip Technology Inc.
6.3 Package Dimensions
.071 (1.80) .055 (1.40) PIN 1 .118 (3.00) .098 (2.50) .020 (0.50) .012 (0.30) .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) .004 (0.09) SOT-23A-3 Dimensions: inches (mm)
2002 Microchip Technology Inc. DS21429B-page11 TC51 PRODUCT IDENTIFICATION SYSTEM To order or obtain information, e.g., on pricing or delivery, refer to the factory or the listed sales office. Sales and Support PART CODE TC51 N 18 0 2 E CB XX Output Configuration: N = Open Drain Detected Voltage: Ex: 18 = 1.8V Output Delay: 0 = 50msec-200msec (standard) Tolerance: 2 = ±2% Temperature: E: -40°C to +85°C Package Type and Pin Count: CB: 3-Pin SOT-23A (equivalent to EIAJ SC-59) Taping Direction: TR: Standard Taping Data Sheets Products supported by a preliminary Data Sheet may have an errata sheet describing minor operational differences and recom- mended workarounds. To determine if an errata sheet exists for a particular device, please contact one of the following: 1. Your local Microchip sales office 2. The Microchip Corporate Literature Center U.S. FAX: (480) 792-7277 3. The Microchip Worldwide Site (www.microchip.com) Please specify which device, revision of silicon and Data Sheet (include Literature #) you are using. New Customer Notification System Register on our web site (www.microchip.com/cn) to receive the most current information on our products.
DS21429B-page12 2002 Microchip Technology Inc. NOTES:
2002 Microchip Technology Inc. DS21429B-page 13 TC51 Information contained in this publication regarding device applications and the like is intended through suggestion only and may be superseded by updates. It is your responsibility to ensure that your application meets with your specifications. No representation or warranty is given and no liability is assumed by Microchip Technology Incorporated with respect to the accuracy or use of such information, or infringement of patents or other intellectual property rights arising from such use or otherwise. Use of Microchip’s products as critical com- ponents in life support systems is not authorized except with express written approval by Microchip. No licenses are con- veyed, implicitly or otherwise, under any intellectual property rights. Trademarks The Microchip name and logo, the Microchip logo, FilterLab, K EELOQ, microID, MPLAB, PIC, PICmicro, PICMASTER, PICSTART, PRO MATE, SEEVAL and The Embedded Control Solutions Company are registered trademarks of Microchip Tech- nology Incorporated in the U.S.A. and other countries. dsPIC, ECONOMONITOR, FanSense, FlexROM, fuzzyLAB, In-Circuit Serial Programming, ICSP, ICEPIC, microPort, Migratable Memory, MPASM, MPLIB, MPLINK, MPSIM, MXDEV, MXLAB, PICC, PICDEM, PICDEM.net, rfPIC, Select Mode and Total Endurance are trademarks of Microchip Technology Incorporated in the U.S.A. Serialized Quick Turn Programming (SQTP) is a service mark of Microchip Technology Incorporated in the U.S.A. All other trademarks mentioned herein are property of their respective companies. © 2002, Microchip Technology Incorporated, Printed in the U.S.A., All Rights Reserved. Printed on recycled paper. Microchip received QS-9000 quality system certification for its worldwide headquarters, design and wafer fabrication facilities in Chandler and Tempe, Arizona in July 1999 and Mountain View, California in March 2002. The Company’s quality system processes and procedures are QS-9000 compliant for its PICmicro® 8-bit MCUs, KEELOQ® code hopping devices, Serial EEPROMs, microperipherals, non-volatile memory and analog products. In addition, Microchip’s quality system for the design and manufacture of development systems is ISO 9001 certified.
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