CXDR7595监控电路监控微处理器和数字系统中的电源电压。它们在通电、断电和断电状态下提供复位输出。通电时，内部计时器将断言的重置保持240ms。这将使微处理器保持重置状态，直到条件稳定。/RESET输出在VCC低至1V时保持工作状态。CXDR7595/CXDR7597提供有效的低复位信号（/RESET），而CXDR7598提供有效的高信号（复位）输CXDR7597/CXDR7598具有推拉输出，而CXDR7595具有开漏输出，这需要一个外部上拉电阻器。八个重置阈值电压选项可用于监测1.8V、2.5V、3V、3.3V和5V电源电压。复位比较器具有内置的故障免疫功能，使其对VCC上的快速瞬变免疫。通常13μA的低电源电流使CXDR7595/CXDR7597/CXDR7598非常适合用于便携式电池驱动设备。在-40℃到+125℃的扩展温度范围内都有规定
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产品概述 返回TOP
TheCXDR7595/CXDR7597/CXDR7598 supervisory circuits monitor the power supply voltage in microprocessor and digital systems. They provide a reset output during power-up, power-down and brownout conditions. On power-up, an internal timer holds reset asserted for 240ms. This holds the microprocessor in a reset state until conditions have stabilized. The /RESET output remains operational with VCC as low as 1V. The CXDR7595/CXDR7597 provides an active low reset signal (/RESET) while the CXDR7598 provides an active high signal (RESET) output. The CXDR7597/CXDR7598 has push-pull outputs, whereas the CXDR7595 has an open-drain output, which requires an external pull-up resistor.
Eight reset threshold voltage options are available suitable for monitoring 1.8V, 2.5V, 3V, 3.3V and 5V supply voltages.
The reset comparator features built-in glitch immunity, making it immune to fast transients on VCC.
The low supply current of typically 13μA makes the CXDR7595/CXDR7597/CXDR7598 ideal for use in portable, battery operated equipment. All are specified over the extended -40℃ to +125℃ temperature range.
产品特点 返回TOP
• Precision Voltage Monitor: 1.8V, 2.5V, 3V, 3.3V, 5V
Options
• Fully Specified over Temperature
• Low Power Consumption (13μA TYP)
• Reset Assertion Down to 1V VCC
• 150ms Min Power-On Reset
Open-Drain /RESETOutput (CXDR7595)
Push-Pull /RESETOutput (CXDR7597)
Push-Pull RESET Output (CXDR7598)
• -40℃ to +125℃ Operating Temperature Range
• Small Packaging
CXDR7595 Available in SOT-23-3 and SOT-23
CXDR7597 Available in SOT-23-3 and SOT-23
CXDR7598 Available in SOT-23-3 and SOT-23
应用范围 返回TOP
Microprocessor Systems
Controllers
Intelligent Instruments
Automotive Systems
Safety Systems
Portable Instruments
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电路原理图 返回TOP
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微处理器复位芯片 |
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|
Product |
Manual Reset |
VCC(Min) (V) |
VCC(Max) (V) |
Supply Current(μA) |
Reset Voltage Threshold (V) |
VCC to RESET/RESET Delay (μs) |
Reset Active Timeout Period (ms) |
Package |
|
Y |
1 |
5.5 |
50 |
4.65,4.4,4.00, 3.08,2.93,2.63 |
200 |
SOIC-8 MSOP-8 |
||
|
Y |
1 |
5.5 |
20 |
4.65,4.4,4.00, 3.08,2.93,2.63 |
200 |
SOIC-8 |
||
|
N |
1 |
5.5 |
3 |
2.93,2.63,2.32,1.63 |
80 |
Programmable |
SOT23-5 |
|
|
N |
1 |
5.5 |
3 |
2.93,2.63,2.32,1.63 |
80 |
Programmable |
SC70-4(R) SOT-143 |
|
|
N |
1 |
5.5 |
13 |
4.63,4.38,4.00,3.08 2.93,2.63,2.32,1.63 |
20 |
240 |
SOT-23-3 SOT-23 |
|
|
N |
1 |
5.5 |
3 |
2.93,2.63,2.32,1.63 |
80 |
Programmable |
SOT-23-5 |
|
|
N |
1 |
5.5 |
13 |
4.63,4.38,4.00,3.08 ,2.93,2.63,2.32,1.63 |
20 |
240 |
SOT-23-3 SOT-23 |
|
|
N |
1 |
5.5 |
13 |
4.63,4.38,4.00,3.08, 2.93,2.63,2.32,1.63 |
20 |
240 |
SOT-23-3 SOT-23 |
|
|
Y |
1 |
5.5 |
13 |
4.63,4.38,4.00,3.08, 2.93,2.63,2.32,1.63 |
20 |
240 |
SOT-143 SOT23-5 |
|
|
Y |
1 |
5.5 |
13 |
4.63,4.38,4.00,3.08 ,2.93,2.63,2.32 |
20 |
240 |
SOT-143 SOT23-5 |
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◀ 上一篇:CXDR7594监控系统电压从1.6V到5V电容器可调复位超时时间低静态电流推拉复位输出复位超时是由电容器外部设置的提供更大的灵活性
下一篇▶:CXDR7596低功耗微处理器监控电路监控系统电压从1.6V到5V有效的低推挽复位输出电容器可调复位超时时间低静态电流推拉/复位输出短期VCC瞬变免疫
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