TC54
VOLTAGE DETECTOR
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Precise Detection Thresholds .... |
Standard ± 2.0% |
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Custom ± 1.0% |
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Small Packages ........... |
SOT-23A-3, SOT-89, TO-92 |
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Low Current Drain ..................................... |
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Typ. 1μA |
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Wide Detection Range .......................... |
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2.1V to 6.0V |
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Wide Operating Voltage Range ............ |
1.5V to 10V |
■Battery Voltage Monitoring
■Microprocessor Reset
■System Brownout Protection
■Switching Circuit in Battery Backup
■Level Discriminator
The TC54 Series are CMOS voltage detectors, suited especially for battery-powered applications because of their extremely low 1μA operating current and small surfacemount packaging. Each part is laser trimmed to the desired threshold voltage which can be specified from 2.1V to 6.0V, in 0.1V 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 (VOUT) remains in the logic HIGH state as long as VIN is greater than the specified threshold voltage (VDET– ). When VIN falls below V–DET, the output is driven to a logic LOW. VOUT remains LOW until VIN rises above V–DET by an amount VHYST, whereupon it resets to a logic HIGH.
*SOT-23A-3 |
SOT-89-3 |
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TO-92 |
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VIN |
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ORDERING INFORMATION |
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PART CODE TC54 V X XX X X X XX XXX |
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TC54 |
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TC54 |
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Output form: |
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TC54 |
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N = Nch Open Drain |
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C = CMOS Output |
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VOUT |
VSS |
VOUT |
VIN |
VSS |
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Detected Voltage: |
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OUT |
IN SS |
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Ex: 21 = 2.1V; 60 = 6.0V |
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V |
V |
V |
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Extra Feature Code: Fixed: 0 |
*SOT-23A-3 is equivalent to EIAJ (SC-59) |
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Tolerance: |
FUNCTIONAL BLOCK DIAGRAM |
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1 = ± 1.0% (custom) |
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2 = ± 2.0% (standard) |
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2 |
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TC54VC only |
Temperature: E: – 40°C to + 85°C |
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VIN |
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Package Type and Pin Count: |
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CB: SOT-23A-3*, MB: SOT-89-3, ZB: TO-92-3 |
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Taping Direction: |
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– |
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VOUT |
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Standard Taping |
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1 |
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Reverse Taping |
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+ |
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No suffix: TO-92 Bulk |
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*SOT-23A-3 is equivalent to EIAJ (SC-59). |
VREF |
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VSS |
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3 |
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TC54VN has open-drain output. |
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TC54VC has complementary output. |
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TC54-10 11/8/96 |
TELCOM SEMICONDUCTOR, INC. |
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4-279 |
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