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Part: TC54VN1102ECBTR
Category:
Logic
-> Delay Lines
Description: 1a Voltage Detector With Output Delay
Company: Microchip Technology, Inc.
Datasheet: Download TC54VN1102ECBTR datasheet File size : 559 kB
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Datasheet text preview:
M
Features
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TC51
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 lasertrimmed 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 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 VIN rises above VDET by an amount VHYST, whereupon it returns to a logic HIGH after expiration of the built-in delay time.
1µA Voltage Detector with Output Delay
Precise Detection Thresholds: ±2.0% Small Package: 3-Pin SOT-23A Low Supply Current: Typ. 1µA 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
Part Number TC51-xxxxxxxxxx Package Temp. Range
3-Pin SOT-23A -40°C to +85°C
Other output voltages are available. Please contact Microchip Technology Inc. for details.
Functional Block Diagram
VIN VOUT
Package Type
3-Pin SOT-23A
VIN 3
VREF
Delay Circuit
TC51
1 VOUT 2 VSS
VSS
NOTE: 3-Pin SOT-23A is equivalent to the EIAJ SC-59.
2002 Microchip Technology Inc.
DS 21429B- page 1
TC51
1.0 ELECTRICAL CHARACTERISTICS
*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.
Absolute Maximum Ratings*
Input Voltage ........+12V Output Current .... 50mA Output Voltage: Open Drain .......... (VSS 0.3V) to 12V Power Dissipation (TA 70°C): 3-Pin SOT-23A .......... 240mW Operating Temperature Range....-40°C to +85°C Storage Temperature Range ..... -65°C to +150°C
TC51 ELECTRICAL SPECIFICATIONS
Electrical Characteristics: TA = 25°C, unless otherwise specified. Symbol VIN ISS P a r a m e te r Operating Voltage Quiescent Current Min 0. 7 -- -- -- -- -- VT x 0.98 VDET - x 0.02 -- -- Typ -- 0.9 1.0 1.3 1.6 2.0 VT ± 0.5% VDET - x 0.05 2.2 7.7 10. 1 11.5 13. 0 -- ±100 Ma x 10.0 2. 6 3. 0 3. 4 3. 8 4. 2 VT x 1.02 VDET - x 0.08 -- -- Units V
µA
Test Conditions (VDET -) = 1.6 to 6.0V VIN = 1.5V VIN = 2.0V VIN = 3.0V VIN = 4.0V VIN = 5.0V Not e 1 VOL = 0.5V, VIN = 1.0V VIN = 2.0V VIN = 3.0V VIN = 4.0V VIN = 5.0V Standard -40°C TA 85°C
VDET VHYST IOUT
Threshold Voltage Hysteresis Voltage Output Current
V V mA
TDLY TC (VDET -)
Note 1:
Delay Time Tempco of (VDET -)
50 --
200 --
ms ec ppm/°C
VT is the factory programmed threshold voltage setting.
DS2142 9B-page 2
2002 Microchip Technology Inc.
TC51
2.0 PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 2-1.
TABLE 2-1:
Pin No. (3-Pin SOT-23A) 1 2 3
PIN FUNCTION TABLE
Symbol VOUT VSS VIN Description Digital output. This output goes low when VIN drops below VDET - and returns high when VIN rises above VDET - + VHYST. (See Figure 3-1, Timing Diagram). Ground terminal. Analog input. This pin is both the power supply input and the voltage to be monitored.
2002 Microchip Technology Inc.
DS 21429B- page 3
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