CXDR75120 CXDR75121 are microprocessor (μP) supervisory circuits used to monitor the power supplies in μP and digital systems. They provide excellent circuit reliability and low cost. These circuits perform a single function: they assert a reset signal whenever the VCC supply voltage declines below a preset threshold, with hysteresis keeping it asserted for time delay determined by externally programmable time delay generator after VCC has risen above the reset threshold. The CXDR75121L has an open-drain output stage, while the CXDR75120 have push-pull outputs. The GCXDR75121’s open-drain RESET output requires a pull-up resistor that can be connected to a voltage higher than VCC. The GCXDR75120 has an active-low RESET output, while the GCXDR75120 has an active-high RESET output. The outputs are guaranteed to be in the correct logic state for VCC down to 0.8V. The CXDR75120/CXDR75121 are available in 5-pin TSOT-23-5 package.
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产品概述 返回TOP
The CXDR75120 CXDR75121 are microprocessor (μP) supervisory circuits used to monitor the power supplies in μP and digital systems. They provide excellent circuit reliability and low cost. These circuits perform a single function: they assert a reset signal whenever the VCC supply voltage declines below a preset threshold, with hysteresis keeping it asserted for time delay determined by externally programmable time delay generator after VCC has risen above the reset threshold. The CXDR75121L has an open-drain output stage, while the CXDR75120 have push-pull outputs. The GCXDR75121’s open-drain RESET output requires a pull-up resistor that can be connected to a voltage higher than VCC. The GCXDR75120 has an active-low RESET output, while the GCXDR75120 has an active-high RESET output. The outputs are guaranteed to be in the correct logic state for VCC down to 0.8V. The CXDR75120/CXDR75121 are available in 5-pin TSOT-23-5 package.
产品特点 返回TOP
„ Precision Monitoring Voltage of +2.2V and +3.7V
„ Fully Specified Over Temperature
„ Available in Three Output Configurations Push-Pull RESET Output (CXDR75120L) Push-Pull RESET Output (CXDR75120H) Open-Drain RESET Output (CXDR75121L)
„ Reset Deassert Time Smaller than 100μs when VCC Higher than Monitor Voltages (CD Pin Floating)
„ Externally Programmable Time Delay Generator
„ 27μA Supply Current at VCC=3.3V
„ Guaranteed Reset Valid to VCC = 0.8V
„ TSOT-23-5 Packages
„ 2% Threshold Accuracy
应用范围 返回TOP
„ Computers
„ Controllers
„ Intelligent Instruments
„ Critical μP and μC Power Monitoring
„ Portable / Battery-Powered Equipment
„ Automotive
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Delay Time Adjustable |
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Part NO. |
VCC(V min. |
VCC(V max. |
Detecting Voltage(V) |
ICD source (μA) |
VTCD (V) |
Vth Accu racy(%) |
Isupply (μA) |
Note |
Package |
|
2.2 |
5.5 |
0.8*VCC |
1.1 |
0.833 |
-- |
4 |
Open-Drain RESET Output TMR(ms) =76000×CMR(uF) |
ADFN1.5X 1.5-6 |
|
|
0.8 |
5.5 |
2.2/3.7 |
0.18 |
-- |
2 |
29 |
CXDR75120H/L is a Push-Pull High/Low Reset CXDR75121L is an Open-Drain Low Reset TCD(ms)=5700×CD(uF) |
TSOT25 |
|
|
0.8 |
5.5 |
2.0/2.2/2.4 |
0.09 |
0.5 |
2 |
35 |
CXDR75122H/L is a Push-Pull High/Low Reset CXDR75123L is an Open-Drain Low Reset TCD(ms)=6740×CD(uF) |
SOT25 TDFN2X2-6 |
|
|
1 |
5.5 |
2.6/2.9/3.1 3.3/3.9/4.34.6 |
0.67 |
1.25 |
2 |
14 |
CXDR75124L is a Push-Pull LowReset CXDR75125L is an Open-Drain Low Reset TCD(ms)=1860×CD(uF)TMR(ms) =88000×CMR(uF) |
SOT26 ADFN1.5X 1.5-6 |
|
|
2.7 |
5.5 |
Individual Set by Resistor |
-- |
0.788 |
2 |
12 |
CXDR75126H/L is a Push-Pull High/Low Reset CXDR75127L is an Open-Drain Low Reset TCD(ms)=2700×CD(uF) |
SOT25 SC70-5 DFN1.6X1.6-6 ADFN1.5X1.5-6 |
|
|
0.8 |
5.5 |
2.5/2.6/2.93.1/3.3/4.04.3/4.6 |
0.88 |
1.25 |
2 |
14 |
CXDR75128H/L is a Push-Pull High/Low Reset CXDR75129L is an Open-Drain Low Reset TCD(ms)=1685×CD(uF) |
SOT25 TSOT23-5 |
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