TS803 Microprocessor Reset Circuit SOT-23 Pin Definition: TS803 TS803R 1. Ground 1. Reset 2. Reset 2. Ground 3. Vcc 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 Precision monitoring of +3V, +3.3V & +5V power supply voltage Fully specified over temperature Available in three output configurations Open-Drain RESET low output 3uA supply current Guaranteed reset valid to Vcc = +1V Power supply transient immunity No external components Part No. Packing TS803R Threshold Voltage B : 4.20V E : 2.93V F : 2.70V Contact factory for additional voltage options. Applications ● ● ● ● ● ● Package TS803CXx RF SOT-23 3Kpcs / 7” Reel TS803RCXx RF SOT-23 3Kpcs / 7” Reel Note: x is the threshold voltage type, option as TS803 Threshold Voltage A : 4.63V B : 4.38V C : 4.00V D : 3.08V E : 2.93V F : 2.63V G : 2.32V H : 2.1V I : 2.0V J : 1.8V K :1.6V Computers Controllers Intelligent Instruments Critical uP and uC power monitoring Portable / Battery Power Equipment Automotive Absolute Maximum Rating Parameter Symbol Value Unit VCC 7 V VRESET - 0.3 ~ (VCC +0.3) V Input Current, VCC ICC 20 mA Output Current, RESET IO 20 mA Rate of Rise, VCC VR 100 V/uS Supply Voltage RESET & (RESET) Open Drain ESD Classification B Note: Stress above the listed absolute maximum rating may cause permanent damage to the device HBM B: 2000V~3999V 1/6 Version: A07 TS803 Microprocessor Reset Circuit Recommended Operating Conditions Parameter Symbol Value VCC <5 Supply Voltage Unit V Operating Ambient Temperature Range TA -40 ~ +85 o Operating Junction Temperature Range TJ -40 ~ +125 o -65 ~ +150 o Storage Temperature Range TSTG C C C o Thermal Resistance Θjc 325 Power Dissipation PD 350 mW TLEAD 10 S o Lead Soldering Temperature (260 C) C/W Electrical Characteristics Ta=25oC, unless otherwise specified. Parameter Input Supply Voltage Supply Current Conditions o o Ta=-40 C~+85 C VCC ≤ VTH * 1.1 o Symbol Min Typ Max Unit VCC 1.0 -- 5.5 V ICC -- -- 3 -- -- 5 o VIN = 3V, Ta=-40 C~+85 C VTH Reset Threshold |VTH| VTH Reset Threshold 0.97 |VTH| (Full temperature range) Reset Threshold VTH Temperature Coefficient VCC to Reset Delay 0.985 VCC = VTH to (VTH - 100mV) o o Reset Active Timeout Period Ta=-40 C~+85 C RESET Output Voltage Low VCC < VTH(MIN), ISINK =1.2mA, -- -- uA 1.015 |VTH| V 1.02 |VTH| V o 3-0 50 160 ppm/ C -- 40 -- uS 0.5 1.5 5 mS VOL -- -- 0.5 V VOH 0.8 VCC -- -- V TDELAY VCC > VTH(MAX), ISOURCE =500uA RESET Output Voltage High VCC > 1.8V VCC > VTH(MAX), ISOURCE =150uA, 1.8V >= VCC > 1V Note 1: The data based on VTH = 2.7V part type. Note 2: Guaranteed by Design 2/6 Version: A07 TS803 Microprocessor Reset Circuit Function Block Function Description Typical Application Circuit Timing Diagram Electrical Characteristics Curve Figure 2. Reset Time vs. Temperature Figure 1. Glitch Rejection 3/6 Version: A07 TS803 Microprocessor Reset Circuit Electrical Characteristics Curve (Continue) Figure 3. Iin vs. Temperature Figure 4. Reset Vth vs. Temperature Figure 5. Iin vs. Vin Figure 6. Threshold Hysteresis vs. Temperature Figure 7. Reset VOL vs. Temperature 4/6 Version: A07 TS803 Microprocessor Reset Circuit SOT-23 Mechanical Drawing DIM A A1 B C D E F G H I J 5/6 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 5º 10º 5º 10º Version: A07 TS803 Microprocessor Reset Circuit 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. 6/6 Version: A07