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TC54VN4902EZBRT PDF预览

TC54VN4902EZBRT

更新时间： 2024-01-27 02:26:03
品牌 Logo 应用领域
美国微芯 - MICROCHIP /
页数 文件大小 规格书
5页 222K
描述
1-CHANNEL POWER SUPPLY SUPPORT CKT, PBCY3, TO-92, 3 PIN

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TC54VN4902EZBRT 技术参数

生命周期：Transferred包装说明：,
Reach Compliance Code：unknown风险等级：5.83
可调阈值：NO模拟集成电路 - 其他类型：POWER SUPPLY SUPPORT CIRCUIT
JESD-30 代码：O-PBCY-W3信道数量：1
功能数量：1端子数量：3
最高工作温度：85 °C最低工作温度：-40 °C
封装主体材料：PLASTIC/EPOXY封装形状：ROUND
封装形式：CYLINDRICAL认证状态：Not Qualified
最大供电电压 (Vsup)：10 V最小供电电压 (Vsup)：0.7 V
标称供电电压 (Vsup)：2.1 V表面贴装：NO
技术：CMOS温度等级：INDUSTRIAL
端子形式：WIRE端子位置：BOTTOM

TC54VN4902EZBRT 数据手册

 浏览型号TC54VN4902EZBRT的Datasheet PDF文件第2页浏览型号TC54VN4902EZBRT的Datasheet PDF文件第3页浏览型号TC54VN4902EZBRT的Datasheet PDF文件第4页浏览型号TC54VN4902EZBRT的Datasheet PDF文件第5页 
AN2  
Using the Microchip TC54 Voltage Detector  
INTRODUCTION  
OPERATION  
Microchip's TC54 series of voltage detectors are designed to  
supersede a variety of discrete comparator circuits and bipolar  
technology voltage detectors.  
The TC54 equivalent circuit is shown in Figure 1. The internal  
precision temperature-compensated reference and comparator  
circuit consistently monitor VIN for an under-voltage condition.  
When such a condition occurs, the output is forced to the active  
(LOW) state and remains there until VIN is once again within  
tolerance. As shown in the timing diagram of Figure 1, the output  
is forced active when VIN < (–VDET) (Where (–VDET) is the threshold  
voltage) and returns HIGH when VIN exceeds (–VDET) plus 5%  
hysteresis (example: if (–VDET) = 2.0V, the output will go HIGH  
when VIN > 2.1V).  
These voltage detectors are especially suited for application in  
battery powered systems because of their extremely low 1µA  
operatingcurrent.Eachpartislaserprogrammedtothedesiredtrip  
point voltage over the range of 1.1V to 6.0V in 100mV steps. For  
complete design flexibility, complementary or open-drain output  
versions are available. TC54 package options include surface  
mount SOT-23A and SOT-89 or through-hole TO-92 types.  
TC54VC only  
Input Voltage  
Release  
Voltage  
Hysteresis  
Voltage  
(+VDET  
)
2
Detect Voltage (–VDET  
)
VIN  
Minimum Operating Voltage  
Ground Level  
VOUT  
–
1
+
Output Voltage  
Ground Level  
VREF  
VSS  
3
FIGURE 1: TC54 block diagram and timing.  
TC54 AS A MICROCONTROLLER  
RESET GENERATOR  
VIN  
Reset generators external to the microcontroller are necessary in  
systems that have slowly rising power supplies. It is necessary to  
hold the microcontroller in its reset state until the power supply has  
reached a valid operating level. Commonly used simple Schmitt  
trigger/capacitor circuits are inadequate since they do not  
accurately monitor the power supply voltage tolerance. The TC54  
series overcomes this problem with precise voltage detection.  
Figure 2 shows a reset circuit using a TC54 replacing bipolar  
integrated voltage detectors (see Table 1).  
VIN  
TC54VC  
VSS  
MCLR  
VOUT  
R
PIC  
Microcontroller  
100  
FIGURE 2: Microcontroller reset circuit using TC54.  
DS00779A-page 1  
© 2001 Microchip Technology, Inc.  
12345

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