CXDR75104 CXDR75105 CXDR75106主要为基于DSP和处理器的系统提供电路初始化和时序监控。在通电期间，当电源电压VCC高于1.1 V时，将断言复位（重置）。此后，电源电压监管器监控VCC，并在VCC保持在阈值电压VIT+（1）以下时保持复位（重置）激活。内部计时器延迟输出返回到非活动状态，以确保系统正确复位。延迟时间td在VCC上升到阈值电压VIT+以上后开始。当电源电压降到阈值电压VIT-（2）以下时，输出再次激活。不需要外部组件。所有器件都有一个由内部分压器设置的固定感应阈值电压VIT。CXDR75104/CXDR75105包含手动复位输入，MR。MR处的低电平导致RESET（RESET）激活。CXDR75104/CXDR75105/CXDR75106具有WDI引脚。watchdog定时器由WDI的正或负转换周期性地触发。当监控系统未能在超时间隔内重新触发看门狗电路时，ttout，RESET（复位）在时间段td内变为激活状态。此事件还将重新初始化监视程序计时器。保持WDI未连接将禁用监视程序。产品光谱设计用于2.5V、3V、3.3V和5V的电源电压
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[ CXDR75104/5/6 ]
目录
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产品概述 返回TOP
The CXDR75104/CXDR75105/CXDR75106 provide circuits initialization and timing supervision, primarily for DSP and processor-based systems. During power-on, RESET (RESET) is asserted when supply voltage VCC becomes higher than 1.1 V. Thereafter, the supply voltage supervisor monitors VCC and keeps RESET (RESET) active as long as VCC remains below the threshold voltage VIT+ (1). An internal timer delays the return of the output to the inactive state to ensure proper system reset. The delay time, td, starts after VCC has risen above the threshold voltage VIT+. When the supply voltage drops below the threshold voltage VIT- (2), the outputs becomes active again. No external components are required. All the devices have a fixed-sense threshold voltage VIT- set by an internal voltage divider. The CXDR75104/CXDR75105 incorporate a manual reset input,MR . A low level at MR causes RESET (RESET) to become active. The CXDR75104/CXDR75105/CXDR75106 have WDI pin. The watchdog timer is periodically triggered by a positive or negative transition at WDI. When the supervising system fails to retrigger the watchdog circuit within the time-out interval, ttout, RESET (RESET) becomes active for the time period td. This event also reinitializes the watchdog timer. Leaving WDI unconnected disables the watchdog. The product spectrum is designed for supply voltages of 2.5V, 3V, 3.3V, and 5V. The circuits are available in a SOT-23-5 package.
产品特点 返回TOP
„ Power-On Reset Generator With Fixed Delay Time of 200ms
„ Manual Reset Input (CXDR75104/CXDR75105)
„ Available in three RESET Output Options Push-Pull RESET Output (CXDR75104L/CXDR75106) Push-Pull RESET Output (CXDR75104H/CXDR75106) Open-Drain RESET Output (CXDR75105L)
„ Supply Voltage Supervision Range 2.5V, 3V, 3.3V, 5V
„ Watchdog Timer (CXDR75104/CXDR75105/CXDR75106)
„ Supply Current of 10μA at VCC=3.3V
„ SOT-23-5 Package
„ Temperature Range . . . −40°C to 85°C
应用范围 返回TOP
„ Critical μP and μC Power Monitoring
„ Industrial Equipment
„ Programmable Controls
„ Automotive Systems
„ Portable/Battery-Powered Equipment
„ Intelligent Instruments
„ Wireless Communications Systems
„ Notebook/Desktop Computers
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产品封装图 返回TOP
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|
Part NO. |
VCC(V min |
VCC(V max |
Detecting Voltage(V) |
Manual |
Delay (ms) |
VthAcc uracy(%) |
Isupply (μA) |
Note |
Package |
|
1 |
5.5 |
2.93 |
N |
360 |
-- |
9 |
CXDR75101 is a Push-Pull Reset CXDR75102 is an OpenDrain Reset |
SOT23 |
|
|
1 |
5.5 |
3/3.3/5 |
Y |
360 |
2 |
10 |
Push-Pull Active-low RESET Output Manual Reset Input |
SOT143 |
|
|
1.1 |
5.5 |
2.25/2.63 2.93/4.55 |
Y |
200 |
2 |
10 |
CXDR75104/5/6 has a watchdog output CXDR75104/5 has MR# |
SOT23-5 |
|
|
1.1 |
5.5 |
2.25/2.63 2.93/4.55 |
Y |
200 |
2 |
10 |
Push-Pull Output,Dual outputs |
SOT23-5 |
|
|
1 |
5.5 |
2.6/2.9/3.1 3.3/3.9/4.3 |
N |
2 |
2 |
16.5 |
CXDR75108H/L is a Push-Pull High/Low Reset CXDR75109L is an Open-drain Low Reset |
SOT23 SC70-3 TO92/SOT89 |
|
|
1 |
5.5 |
2.3/2.5 |
N |
0.06 |
1.5 |
3.3 |
CXDR75110H is an Open-Drain High Reset CXDR75110L is an Open-Drain Low Reset |
SC70-4 SC82 SOT343 |
|
|
2.5 |
5.5 |
Individual Set by Resistor |
N |
140 |
2.5 |
4 |
CXDR75111H/L is a Push-Pull High/Low Reset CXDR75112L is an Open-Drain Low Reset |
SOT23-5 |
|
|
2.7 |
5.5 |
Individual Se tby Resistor |
Y |
200 |
2 |
18 |
CXDR75113H/L is a Push-Pull High/Low Reset CXDR75114L is an Open-Drain Low Reset |
SOT23-5 |
|
|
1 |
5.5 |
2.63/2.93/ 3.08/4.0/ 4.38/4.63 |
N |
140 |
2 |
10 |
CXDR75115H/L is a Push-Pull High/Low Reset CXDR75116L is an Open-Drain Low Reset |
SOT23 SC70-3 |
|
|
1 |
5.5 |
2.64/2.91/3.1 3.96/4.32/4.6 |
Y |
230 |
2 |
14 |
CXDR75117H/L is a Push-Pull High/Low Reset CXDR75118L is an Open-Drain Low Reset |
SOT25 SC70-5 SOT143 |
◀ 上一篇:CXDR75103手动复位输入推挽和主动低复位输出微处理器监控电路复位比较器VCC上的快速瞬变输出保证在VCC低至1V的正确逻辑状态推拉激活低复位输出
下一篇▶:CXDR75107上电复位发电机固定延迟时间为200毫秒手动复位输入内部计时器延迟输出返回到非活动状态确保系统正确复位MR处的低电平导致RESET激活
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