TS3809/3810 Series
Microprocessor Reset Circuit
SOT-23
Pin Definition: TS3809 TS3810 1. GND 1. GND 2. (RESET) 2. RESET 3. VCC 3. VCC
General Description
The TS3809/3810 series are used for microprocessor (µP) supervisory circuits 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, +2.5V 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 200ms after VCC has risen above the reset threshold. Reset thresholds suitable for operation with a variety of supply voltages are available. TS3809/3810 series have push pull outputs. TS3809 series have an active low RESET output, while the TS3810 has an active high RESET output The reset comparator is designed to ignore fast transients on VCC, and the outputs are guaranteed to be in the correct logic state for VCC down to 1.0V. Low supply current makes TS3809/3810 series ideal for use in portable equipment.
Features
● ● ● ● ● ● ● ● ● ● High Accurate: ±2% Precision monitoring of +3V, +3.3V and +5V Power supply voltage Fully specified over temperature Available in three output configurations Push-Pull RESET low output (TS3809) Push-Pull (RESET) high output (TS3810) 200mS typ. Power-on reset pulse width 25µS supply current Guaranteed reset valid to Vcc=+1V Power supply transient immunity
Ordering Information
Part No.
TS3809CXx RF
Package
SOT-23
Packing
3Kpcs / 7” Reel
3Kpcs / 7” Reel TS3810CXx RF SOT-23 Note: x is the threshold voltage type, option as: A : 4.63V B : 4.38V C : 4.00V D : 3.08V E : 2.93V F : 2.63V G : 2.25V
Typical Application Circuit
Applications
● ● ● ● ● Battery-operated systems and Controllers Intelligent instruments Critical uP and uC power monitoring Portable / Battery powered equipment Automotive
Absolute Maximum Rating
Parameter
Terminal Voltage (with respect to Gnd) RESET & (RESET) push-pull Input Current, VCC Output Current, RESET, (RESET) Power Dissipation Operating Junction Temperature Range Storage Temperature Range o Lead Soldering Temperature (260 C)
Symbol
VCC VRESET ICC IO PD TJ.OPR TSTG TLEAD
Maximum
GND - 0.3 to GND +6.5 GND - 0.3 to VCC +0.3 20 5 (TJ-TA)/θJA -40 ~ +125 -65 ~ +150 10
Unit
V V mA mA mW o C o C S
1/7
Version: D11
TS3809/3810 Series
Microprocessor Reset Circuit
Thermal Performance
Parameter
Thermal Resistance from Junction to Case Thermal Resistance from Junction to ambient
2
Symbol
θJC θJA
Maximum
110 250
Unit
ºC/W ºC/W
Note: θJA is measured the PCB copper area of approximately 1in (Multi-layer). Needs to connect to VSS pin.
Electrical Specification (Ta = 25oC, unless otherwise specified.)
Parameter
Input Supply Voltage Supply Current
o
Conditions
Ta=-40 C~+85 C VCC=VTH +1V TS3809/3810CXA TS3809/3810CXB TS3809/3810CXC TS3809/3810CXD TS3809/3810CXE TS3809/3810CXF TS3809/3810CXG TA=0~+85ºC VCC = 0 ~ (VTH - 100mV) VCC = VTH ~ (VTH - 100mV) TA=0~+85ºC 1.8V
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