CXDR75128 CXDR75129具有开漏输出级，而CXDR75128具有推拉输出。CXDR75129的开漏复位输出需要一个上拉电阻器，该电阻器可以连接到高于VCC的电压。CXDR75128具有活动低复位输出，而CXDR75128具有活动高复位输出。复位比较器被设计成忽略VCC上的快速瞬变，并且输出保证在VCC低至0.8V的正确逻辑状态。低电源电流使CXDR75128/CXDR75129非常适合用于便携式设备。CXDR75128/CXDR75129有5针SOT2 3-5或TSOT-23-5封装。CXDR75128/CXDR75129是微处理器（μP）监控电路，用于监控μP和数字系统中的电源。当与+5V，+3.3V，+3.0V电源电路一起使用时，它们提供了卓越的电路可靠性和低成本及调整。这些电路执行一个单一的功能：每当VCC电源电压下降到预设阈值以下时，它们就断言一个重置信号，而当VCC上升到重置阈值以上时，滞后使其保持为外部可编程延时发生器确定的延时断言。适用于各种电源电压操作的重置阈值可用
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7.相关产品
产品概述 返回TOP
The CXDR75129L has an open-drain output stage, while the CXDR75128 have push-pull outputs. The CXDR75129’s open-drain RESET output requires a pull-up resistor that can be connected to a voltage higher than VCC. The CXDR75128 have an active-low RESET output, while the CXDR75128 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 0.8V. Low supply current makes the CXDR75128/CXDR75129 ideal for use in portable equipment. The CXDR75128/CXDR75129 are available in 5-pin SOT23-5 or TSOT-23-5 packages.The CXDR75128/CXDR75129 are microprocessor (μP) supervisory circuits used to monitor the power supplies in μP and digital systems. They provide excellent circuit reliability and low cost 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, with hysteresis keeping it asserted for time delay determined by externally programmable time delay generator after VCC has risen above the reset threshold. Reset thresholds suitable for operation with a variety of supply voltages are available.
产品特点 返回TOP
„ Precision Monitoring of +3V, +3.3V, and +5V Power-Supply Voltages
„ Fully Specified Over Temperature
„ Available in Three Output Configurations Push-Pull RESET Output (CXDR75128L) Push-Pull RESET Output (CXDR75128H) Open-Drain RESET Output (CXDR75129L)
„ Externally Programmable Time Delay Generator
„ 14μA Supply Current
„ Guaranteed Reset Valid to VCC = 0.8V
„ Power Supply Transient Immunity
„ 5 pin SOT-23-5 or 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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产品封装图 返回TOP
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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 |
|
