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TS61 Series
Voltage Detector
SOT-23
Pin Definition: 1. Output 2. Ground 3. Input
General Description
The TS61 series are highly precise, low power consumption voltage detectors, manufactured using CMOS and laser trimming technologies. Detect voltage is extremely accurate with minimal temperature drift. Both CMOS and N-channel open drain output configurations are available.
Features
Highly Accurate: 2% Detecting Voltage Temperature Characteristics: TYP 100ppm /C Low Power Consumption, 0.7uA (typ) @VIN=1.5V Detect Voltage Range: 1.6V ~ 6.0V Operating Voltage Range: 0.7V ~ 10V Output Configuration: N-Channel open drain or CMOS
Ordering Information
Part No. Package Packing
TS61CxxCX RF SOT-23 3Kpcs / 7" Reel TS61NxxCX RF SOT-23 3Kpcs / 7" Reel Note: * Where xx denotes voltage option, available are 20= 2.0V 23= 2.3V 24= 2.4V 25= 2.5V 27= 2.7V 30= 3.0V 33= 3.3V 40= 4.0V 42= 4.2V 44= 4.4V 45= 4.5V Contact factory for additional voltage option. * TS61C: CMOS output * TS61N: N-Channel Open Drain Output
Applications

Battery-operated systems Microprocessor reset circuitry Memory battery back-up circuits Power-on reset circuits Power failure detection System battery life and charge voltage monitors
Block Diagram
CMOS Output N-Channel Open Drain Output
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Version: A07
TS61 Series
Voltage Detector
Absolute Maximum Rating
Parameter
Input Voltage Output Current Output Voltage Power Dissipation CMOS N-channel open drain SOT-23
Symbol
VIN Io VOUT PD TA
Maximum
+12 50 (Gnd - 0.3) to (VIN + 0.3) (Gnd - 0.3) to 12 150 -40 ~ +85
Unit
V mA V mW
o o
Operating Ambient Temperature Range
C
Storage Temperature TSTG -65 ~ +150 C Note: Stress 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 section of the specifications is not implied.
Electrical Specifications (Ta = 25 oC, unless otherwise noted)
Parameter
Detect Voltage Hysteresis range VIN=1.5V VIN=2.0V Supply Current VIN=3.0V VIN=4.0V VIN=5.0V Operating Voltage VDF(T)=1.6V~6V N-channel VDS=5V VIN=1.0V VIN=2.0V Output Current VIN=3.0V VIN=4.0V VIN=5.0V P-channel VDS=2.1V (with CMOS output) VIN=8.0V Temperature Characteristics -40C TA 85C IOUT VDF TA xVDF ---10.0 100 -2.0 -mA ppm / C ms 4 -5 IOUT 1.0 3.0 5.0 6.0 7.0 2.2 7.7 10.1 11.5 13.0 -----mA 3 VIN Iss
Conditions
Symbol
VDF VHYS / VDF
Min
VDFx 0.98 2 -----0.7
Typ
VDF -0.7 0.8 0.9 1.0 1.1 --
Max
VDFx 1.02 8 2.3 2.7 3.0 3.2 3.6 10.0
Unit
V %
Circuit
1 1
A
2
V
1
Delay Time Vdr VOUT inversion tDLY --0.2 Note: VDF(T): Established Detect Voltage Value, 1.6V ~ 6.0V 2% for Standard Voltage Detectors Release Voltage: VDR = VDF + VHYS
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Version: A07
TS61 Series
Voltage Detector
Typical Application Circuit
CMOS Output N-Channel Open Drain Output
Measuring Circuit
Test Circuit 1 Test Circuit 2 Test Circuit 3
* Not Necessary with CMOS output product
Test Circuit 4
Test Circuit 5
* Not Necessary with CMOS output products
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Version: A07
TS61 Series
Voltage Detector
Directions for use
1. Please use this IC within the stated maximum ratings. Operation beyond these limits may cause degrading or permanent damage to the device. 2. When a resistor is connected between the VIN pin and the input CMOS output configurations, oscillation may occur as a result of voltage drops at RIN if load current (IOUT) exists. (refer to the Oscillation Description below). 3. When a resisted is connected between the VIN pin and the input with CMOS output configurations, irrespective of N-ch output configurations, oscillation may occur as a result of through current at the time of voltage release even if load current (IOUT) does not exist. (refer to the Oscillation Description below) 4. In order to stabilize the IC's operations, please ensure that VIN pin's input frequency's rise and fall times are more than several s/V. 5. Please use N-ch open drains configuration, when a resistor RIN is connected between the VIN pin and power source. In such cases, please ensure that RIN is less than k and that C is more than 0.1F.
Diagram: Circuit using an input resistor
Oscillation Description
OUTPUT CURRENT OSCILLATION WITH THE CMOS OUTPUT CONFIGURATION When the voltage applied at IN rises, release operations commence and the detector's output voltage increases. Load current (IOUT) will flow at RL. Because a voltage drop (RIN x IOUT) is produced at the RIN resistor, located between the input (IN) and the VIN pin, the load current will flow via the IC's VIN pin. The voltage drop will also lead to a fall in the voltage level at the VIN pin. When the VIN pin voltage level falls below the detec voltage level, detect operations will commence. Following detect operations, load current flow will cease and since voltage drop at RIN will disappear, the voltage level at the VIN pin will rise and release operations will begin over again. Oscillation may occur with this "release-detect-release" repetition. Further, this condition will also appear via means of a similar mechanism during detect operations.
Diagram 1: Oscillation in relation to output current
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Version: A07
TS61 Series
Voltage Detector
Oscillation Description (Continue)
OUTPUT CURRENT OSCILLATION WITH THE CMOS OUTPUT CONFIGURATION Since the TS61 series are CMOS ICs, through current will flow when the IC's internal circuit switching operates (during release and detect operations). Consequently, oscillation is liable to occur as a result of drops in voltage at the through current's resistor (RIN) during release voltage operations (refer to diagram 2). Since hysteresis exists during detect operation, oscillation is unlikely to occur.
Diagram 2: Oscillation in relation to through current
Function Description
1. When input voltage (VIN) rises above detect voltage (VDF), output voltage (VOUT) will be equal to VIN. (A condition of high impedance exists with N-ch open drain output configurations). 2. When input voltage (VIN) falls below detect voltage (VDF), output voltage will be equal to the ground voltage (VSS). 3. When input voltage (VIN) falls to a level below that of the minimum operating voltage (VMIN), output will become unstable. In this condition, VIN will equal the pulled-up output (should output be pull-up). 4. When input voltage (VIN) rises above the ground voltage (VSS) level, output will be unstable at levels below the minimum operating voltage (VMIN). Between the VMIN and detect release voltage VDR level, the ground voltage (VSS) level will be maintained. 5. When input voltage (VIN) rises above detect release voltage (VDR), output voltage (VOUT) will be equal to VIN. (A condition of high impedance exists with N-ch open drain output configurations.) 6. The difference between VDR and VDF represents the hysteresis range. Timing Chart
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Version: A07
TS61 Series
Voltage Detector
SOT-23 Mechanical Drawing
DIM A A1 B C D E F G H I J
SOT-23 DIMENSION MILLIMETERS INCHES MIN MAX MIN MAX. 0.95 BSC 0.037 BSC 1.9 BSC 0.074 BSC 2.60 3.00 0.102 0.118 1.40 1.70 0.055 0.067 2.80 3.10 0.110 0.122 1.00 1.30 0.039 0.051 0.00 0.10 0.000 0.004 0.35 0.50 0.014 0.020 0.10 0.20 0.004 0.008 0.30 0.60 0.012 0.024 5 10 5 10
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Version: A07
TS61 Series
Voltage Detector
Notice
Specifications of the products displayed herein are subject to change without notice. TSC or anyone on its behalf, assumes no responsibility or liability for any errors or inaccuracies. Information contained herein is intended to provide a product description only. No license, express or implied, to any intellectual property rights is granted by this document. Except as provided in TSC's terms and conditions of sale for such products, TSC assumes no liability whatsoever, and disclaims any express or implied warranty, relating to sale and/or use of TSC products including liability or warranties relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright, or other intellectual property right. The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications. Customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify TSC for any damages resulting from such improper use or sale.
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Version: A07

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