VOLTAGE DETECTOR VOLTAGE DETECTOR. TC54 Series GENERAL DESCRIPTION FEATURES APPLICATIONS ORDERING INFORMATION TC54 V X XX X X X XX XXX
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1 VOLTAGE DETECTOR FEATURES Precise Detection Thresholds... Standard ± 2.0% Custom ±.0% Small Packages... SOT-23A-3, SOT-89, TO-92 Low Current Drain... Typ. µa Wide Detection Range... 2.V to 6.0V Wide Operating Voltage Range....5V to 0V APPLICATIONS Battery Voltage Monitoring Microprocessor Reset System Brownout Protection Switching Circuit in Battery Backup Level Discriminator PIN CONFIGURATIONS FUNCTIONAL BLOCK DIAGRAM VIN *SOT-23B-3 SOT-89-3 TO-92 2 V IN 2 TC54 3 V OUT V SS VOUT V IN TC54 V SS *SOT-23A-3 is equivalent to EIAJ (SC-59) V OUT V IN V SS TC54 TC54VC only VOUT 2 3 GENERAL DESCRIPTION The are CMOS voltage detectors, suited especially for battery-powered applications because of their extremely low µa operating current and small surfacemount packaging. Each part is laser trimmed to the desired threshold voltage which can be specified from 2.V to 6.0V, in 0.V steps. The device includes a comparator, low-current highprecision reference, laser-trimmed divider, hysteresis circuit and output driver. The TC54 is available with either an opendrain or complementary output stage. In operation, the TC54'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 V DET, the output is driven to a logic LOW. V OUT remains LOW until V IN rises above V DET by an amount V HYST, whereupon it resets to a logic HIGH. ORDERING INFORMATION PART CODE TC54 V X XX X X X XX XXX Output form: N = Nch Open Drain C = CMOS Output Detected Voltage: Ex: 2 = 2.V; 60 = 6.0V Extra Feature Code: Fixed: 0 Tolerance: = ±.0% (custom) 2 = ± 2.0% (standard) Temperature: E: 40 C to + 85 C Package Type and Pin Count: CB: SOT-23A-3*, MB: SOT-89-3, ZB: TO-92-3 Taping Direction: 73: Standard Taping 723: Reverse Taping No Suffix: TO-92 Bulk * SOT-23A-3 is equivalent to EIAJ (SC-59). VREF TC54VN has open-drain output. TC54VC has complementary output. VSS 3 TC54-0 /8/96 TelCom Semiconductor reserves the right to make changes in the circuitry and specifications to its devices.
2 ABSOLUTE MAXIMUM RATINGS* Supply Voltage V IN...2V Output Voltage: CMOS... (V SS 0.3) to (V IN ) Open Drain... (V SS 0.3) to 2V Output Current...50mA Power Dissipation: (T A 70 C) SOT-23A mW SOT mW TO mW Operating Temperature C to + 85 C Storage Temperature C to + 50 C Soldering Temperature (0 sec) C * 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. ELECTRICAL CHARACTERISTICS: T A = 25 C, unless otherwise specified. Symbol Parameter Test Conditions Min Typ Max Unit V IN Operating Voltage V DET = 2. to 6.0V V I SS Quiescent Current V IN = 2.V V µa 4.0V V V DET Threshold Voltage (V DET) (V DET) V x 0.98 x.02 V HYST Hysteresis Range (V DET) (V DET) (V DET) V x 0.02 x 0.05 x 0.08 I OUT Output Current Nch V DS = 0.5 V IN = 2.V 7.7 ma 3.0V V.5 5.0V 3.0 Pch V DS = 2.V V IN = 8.0V 0.0 T C (V DET) Tempco of (V DET) 40 C T A 85 C ± 00 ppm/ C PIN DESCRIPTION Pin No. Symbol Description V IN Analog input. This pin is both the power supply input and the voltage to be monitored. 2 V OUT Digital output. This output goes low when V IN drops below V DET and returns high when V IN rises above V DET + V HYST. (See timing chart). 3 V SS Ground terminal. 2
3 TIMING CHART DESCRIPTION OF OPERATION VIN DETECT VOLTAGE VDET MINIMUM OPERATING VOLTAGE GROUND LEVEL OUTPUT VOLTAGE GROUND LEVEL VHYST + VDET RELEASE VOLTAGE OR RESET VOLTAGE Refer to the Timing Chart below. In normal steady-state operation, when V IN > V DET, the output will be at a logic high. In the case of the TC54V, this is an open-drain condition. If and when the input falls below V DET, the output will pull down (Logic 0) to V SS. Generally, V OUT can pull down to within 0.5V of V SS at rated output current and input voltage. (See the Electrical Characteristics section). The output, V OUT, will stay valid until the input voltage falls below the Minimum Operating Voltage, V IN (MIN), of.5v. Below this minimum operating voltage, the output is undefined. During power-up or anytime V IN has fallen below V IN (MIN), V OUT will remain undefined until V IN rises above V IN (MIN), at which time the output will become valid. V OUT will be in its active low state while V IN (MIN) < V IN < V DET +. (V + DET = V DET + V HYST). If and when the input rises above V + DET, the output will assume its inactive state. (High for TC54VC, open-drain for TC54VN). APPLICATIONS Refer to TelCom Semiconductor Application Note #2, Using the TC54 Voltage Detector. ING SOT-23A-3 SOT-89-3 TO = output (Nch or CMOS) plus first voltage digit Nch M N P R S CMOS C D E F H ex: CMOS 3.x = D = first voltage decimal (0-9) ex: CMOS 3.4 = D 4 & = assembly lot number, & = 54x (fixed) = output (C = CMOS, N = Nch) = first voltage digit (2-6) = first voltage decimal (0-9) = extra feature code : fixed : 0 = detecting accuracy = ±.0% (custom), 2 = ± 2.0% (standard),, & = assembly lot number 3
4 TAPING FORMS Component Taping Orientation for SOT PIN Device Marking Device Marking W PIN P Standard Reel Component Orientation for 73 or TR Suffix Device (Mark Right Side Up) & Reel Specifications Table Reverse Reel Component Orientation for 723 or RT Suffix Device (Mark Upside Down) Package Carrier Width (W) Pitch (P) Part Per Full Reel Reel Size 3L SOT-23A 8 mm 4 mm L SOT-89 8 mm 8 mm
5 TAPING FORMS (Cont.) Component Taping Orientation for TO-92 P Mark Face Seal Back W Mark Face P Seal Back W Standard Reel Component Orientation for 73 or TR Suffix Device Reverse Reel Component Orientation for 723 or RT Suffix Device & Reel Specifications Table Package Carrier Width (W) Pitch (P) Part Per Full Reel Reel Size TO-92 8 mm 2.7 mm 000/
6 TAPING FORMS (Cont.) Component Taping Orientation for TO-92 (Cont.) Marked Face Seal Back PACKAGE DIMENSIONS *SOT-23A (0.50).02 (0.30).8 (3.00).098 (2.50).07 (.80).055 (.40) 0.75 (.90) REFERENCE.22 (3.0).06 (2.70).05 (.30).035 (0.90).006 (0.5).000 (0.00) 0 MAX..022 (0.55).04 (0.35).00 (0.25).004 (0.09) *NOTE: SOT-23A-3 is equivalent to EIAJ (SC-59) Dimensions: inches (mm) 6
7 PACKAGE DIMENSIONS (Cont.) SOT (4.60).73 (4.40).072 (.83).055 (.40).063 (.60).055 (.40).02 (2.60).090 (2.29).67 (4.25).55 (3.94).022 (0.56).07 (0.44).047 (.20).035 (0.89).07 (0.44).04 (0.35).062 (.60).056 (.40) TO (5.33).70 (4.32).500 (2.70) MIN..65 (4.9).25 (3.8).05 (2.67).080 (2.03).205 (5.2).75 (4.45).08 (0.46).05 (0.38).055 (.40).045 (.4).05 (2.67).095 (2.4).35 (3.43) MIN..08 (0.46).05 (0.38) Dimensions: inches (mm) Sales Offices TelCom Semiconductor 300 Terra Bella Avenue P.O. Box 7267 Mountain View, CA TEL: FAX: TelCom Semiconductor Austin Product Center 90 Burnet Rd. Suite 24 Austin, TX TEL: FAX: TelCom Semiconductor H.K. Ltd. 0 Sam Chuk Street, Ground Floor San Po Kong, Kowloon Hong Kong TEL: FAX: Printed in the U.S.A.
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