TS803
Microprocessor Reset Circuit
SOT-23
Pin Definition:
TS803
TS803R
1. Ground
2. Reset
3. Vcc
1. Reset
2. Ground
3. Vcc
General Description
The TS803/TS803R are microprocessor (µP) supervisory circuit used to monitor the power supplies in µP and digital
systems. They provide excellent circuit reliability and low cost by eliminating external components and adjustments
when used with +5V, +3.3V, +3.0V powered circuits. These circuits perform a single function: they assert a reset
signal whenever the VCC supply voltage declines below a preset threshold, keeping it asserted for at least 140ms
after VCC has risen above the reset threshold. Reset thresholds suitable for operation with a variety of supply
voltages are available. The TS803/TS803R are open –drain outputs. The TS803/TS803R have an active low RESET
output, while the TS803/TS803R has an active high RESET output. The reset comparator is designed to ignore fast
transients on VCC, and the output guaranteed to be in the correct logic state for VCC down to 1V. Low supply correct
makes the TS803/TS803R ideal for use in portable equipment.
Features
Ordering Information
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Precision monitoring of +3V, +3.3V & +5V power
Part No.
Package
Packing
supply voltage
TS803CXx RF
TS803RCXx RF
SOT-23
SOT-23
3Kpcs / 7” Reel
3Kpcs / 7” Reel
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Fully specified over temperature
Available in three output configurations
Open-Drain RESET low output
3uA supply current
Note: x is the threshold voltage type, option as
TS803 Threshold Voltage
A : 4.63V
E : 2.93V
I : 2.0V
B : 4.38V C : 4.00V D : 3.08V
F : 2.63V G : 2.32V H : 2.1V
J : 1.8V
Guaranteed reset valid to Vcc = +1V
Power supply transient immunity
No external components
K :1.6V
TS803R Threshold Voltage
Applications
B : 4.20V E : 2.93V F : 2.70V
Contact factory for additional voltage options.
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Computers
Controllers
Intelligent Instruments
Critical uP and uC power monitoring
Portable / Battery Power Equipment
Automotive
Absolute Maximum Rating
Parameter
Symbol
VCC
Value
Unit
V
Supply Voltage
7
RESET & (RESET) Open Drain
Input Current, VCC
VRESET
ICC
- 0.3 ~ (VCC +0.3)
V
20
20
100
B
mA
mA
V/uS
Output Current, RESET
Rate of Rise, VCC
IO
VR
ESD Classification
Note: Stress above the listed absolute maximum rating may cause permanent damage to the device
HBM B: 2000V~3999V
1/6
Version: A07