TC54 Voltage Detector Features General Description Precise Detection Thresholds: Standard 2.0%, The TC54 series are CMOS voltage detectors that are Custom 1.0% especially well suited for battery-powered applications because of their extremely low 1 A operating current Small Packages: 3-Pin SOT-23A, 3-Pin SOT-89, and small surface-mount packaging. Each part is laser- TO-92 and 5-Pin SOT-23A (7.7V only) trimmed to the desired threshold voltage, which can be Low Current Drain: Typ. 1 A specified from 1.4V to 7.7V for a 2% tolerance and from Wide Detection Range: 1.1V to 6.0V and 7.7V 1.5V to 6.0V for a 1% tolerance. Wide Operating Voltage Range: 0.7V to 10V The device includes a comparator, low-current high- precision reference, laser-trimmed divider, hysteresis Applications circuit and output driver. The TC54 is available with either an open-drain or complementary output stage. Battery Voltage Monitoring Microprocessor Reset ) remains in During operation, the TC54 s output (V OUT the logic-high state as long as V is greater than the System Brown-Out Protection IN specified threshold voltage (V ). When V falls DET IN Switching Circuit in Battery Backup below V , the output is driven to a logic-low. V DET OUT Level Discriminator remains low until V rises above V by an amount IN DET V , whereupon it resets to a logic-high. HYST Functional Block Diagram TC54VC only Package Types 2 V IN 3-Pin SOT-23A 3-Pin SOT-89 V IN V IN V 3 OUT 1 + TC54 TC54 12 1 2 3 V V V V V V OUT SS OUT IN SS REF V SS 3 3-Pin TO-92 5-Pin SOT-23A NC NC TC54VN has open-drain output. TC54VC has complementary output. 12 3 5 4 TC54 1 2 3 V V V OUT IN SS VV V VV OUOUTT IN SSSS Note: 3-Pin SOT-23A is equivalent to the EIAJ SC-59 5-Pin SOT-23A is equivalent to the EIAJ SC-74A. (7.7V ONLY) 2004 Microchip Technology Inc. DS21434G-page 1TC54 Stresses above those listed underAbsolute Maximum 1.0 ELECTRICAL Rating may cause permanent damage to the device. These CHARACTERISTICS 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. Absolute Maximum Ratings Exposure to Absolute Maximum Rating conditions for Input Voltage ...................................................................+12V extended periods may affect device reliability. Output Current ..............................................................50 mA Output Voltage: CMOS................(V 0.3V) to (V + 0.3V) SS IN PIN FUNCTION TABLE Open-Drain.....................(V 0.3V) to 12V SS Power Dissipation (T 70C): Symbol Description A 3-Pin SOT-23A .......................................................240 mW V Digital Output OUT 3-Pin SOT-89..........................................................500 mW 5-Pin SOT-23A .......................................................240 mW V Analog Input IN 3-Pin TO-92 ............................................................300 mW V Ground Terminal SS Operating Temperature Range........................-40C to +85C NC No Connect Storage Temperature Range.........................-65C to +150C NC No Connect DC CHARACTERISTICS Electrical Specifications: Unless otherwise noted, T = +25C. A Parameter Sym Min Typ Max Units Test Conditions Operating Voltage V 0.7 10.0 V (V ) = 0.8 to 6.0V IN DET Quiescent Current I 0.8 2.7 AV = 2.0V SS IN 0.9 3.0 V = 3.0V IN 1.0 3.2 V = 4.0V IN 1.1 3.6 V = 5.0V IN Threshold Voltage V 1.37 1.4 1.43 V TC54VX14 DET (Note 1) 2.06 2.1 2.14 TC54VX21 2.65 2.7 2.75 TC54VX27 2.84 2.9 2.96 TC54VX29 2.94 3.0 3.06 TC54VX30 4.12 4.2 4.28 TC54VX42 4.21 4.3 4.39 TC54VX43 7.54 7.7 7.86 TC54VX77 (5-pin SOT-23A only) Hysteresis Voltage V 28 70 112 mV V = 1.4V (typ) HYST DET 42 105 168 V = 2.1V (typ) DET 54 135 216 V = 2.7V (typ) DET 58 145 232 V = 2.9V (typ) DET 60 150 240 V = 3.0V (typ) DET 84 210 336 V = 4.2V (typ) DET 86 215 344 V = 4.3V (typ) DET 154 385 616 V = 7.7V (typ) DET Output Current I 7.7 mAV = 0.5V, V = 2.1V OUT OL IN 10.1 V = 3.0V IN 11.5 V = 4.0V IN 13.0 V = 5.0V IN -10.0 TC54VC Only: V = V 2.1V, V = 8.0V OH IN IN Tempco of (V ) T (V ) 100 ppm/C -40C T 85C DET C DET A Delay Time t 0.2 msV V inversion DLY DET OUT Note 1: For other voltage options, please contact your regional Microchip sales office. DS21434G-page 2 2004 Microchip Technology Inc.