Datasheet > MCP120T-300DI/TO

MCP120T-300DI/TO

更新时间： 2024-01-26 06:31:01

品牌	Logo	应用领域
美国微芯 - MICROCHIP		/
页数	文件大小	规格书
8页	101K
描述
IC,VOLT DETECTOR,FIXED,+2.93V,CMOS,SIP,3PIN,PLASTIC

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MCP120T-300DI/TO 技术参数

是否Rohs认证：	不符合	生命周期：	Contact Manufacturer
Reach Compliance Code：	not_compliant	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	5.18
可调阈值：	NO	JESD-609代码：	e0
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
封装等效代码：	SIP3,.1,50	电源：	1/5.5 V
认证状态：	Not Qualified	子类别：	Power Management Circuits
最大供电电流 (Isup)：	0.06 mA	表面贴装：	NO
技术：	CMOS	温度等级：	INDUSTRIAL
端子面层：	Tin/Lead (Sn/Pb)	端子节距：	1.27 mm
端子位置：	SINGLE	阈值电压标称：	+2.93V
Base Number Matches：	1

MCP120T-300DI/TO 数据手册

AN820

System Supervisors in ICSP^TMArchitectures

CIRCUITRY BACKGROUND

MCP120 Output Stage

Author:

Ken Dietz

Microchip Technology Inc.

A simplified schematic for the MCP120 output stage is

shown in Figure 1. Nominally, the output stage of the

MCP120 can handle sinking less than 1 mA of current

in a high impedance state. That is, when the output is

not driving low and when a voltage is applied to the out-

put that is higher than the power supply level, the out-

put can handle sinking less than 1 mA. Other pertinent

electrical specifications for the device are shown in the

data sheet, which includes test conditions for the chip.

INTRODUCTION

Semiconductor manufacturers have designed several

types of circuit supervisors with varying types of func-

tionality over the past few years. Some supervisors

incorporate watchdog features as well as complex func-

tions, such as programmable threshold levels. As it

turns out, most system supervisor data sheets address

typical supervisor functions related to Power-on Reset,

power-down, and brown-out conditions. In order to

serve a wide customer base, semiconductor manufac-

turers should also address system supervisors

designed into systems where microcontrollers (MCUs)

and programmable logic devices (PLDs) are pro-

grammed in-circuit. Programming PICmicro^®micro-

controllers in this fashion is known as In-Circuit Serial

Programming^TM(ICSP^TM), which can be implemented

for a variety of reasons, including field upgrades.

The MCP120 has an open drain output, though it is not

a true open drain. Specifically, the PMOS transistor on

the high side of the output stage is diode-connected, as

shown in Figure 1. When the voltage applied to the out-

put of the supervisor exceeds the power supply for the

chip, the PMOS transistor acts like a forward biased

diode. Lastly, since the output stage is open drain, a

pull-up resistor is required between the supervisor out-

put and V_DD

System supervisors are available with several types of

output stages. Some have active low output stages,

some active high, and there are others similar to the

MCP100, with output stages that drive RESET lines

both high and low. Supervisor output stages are

extremely important to understand for ICSP circuitry,

since programming equipment actually drives the out-

put stages when the MCU or PLD is being pro-

grammed. While there is a wide variety of supervisor

types available on the market, this Application Note pri-

marily focuses on the MCP120, which has an open

drain, active low, output stage. Even though the

MCP120 was chosen for this ICSP example, the design

techniques included below are intended to guide

designers with supervisors of all kinds for ICSP

circuitry.

Out

GND

FIGURE 1: MCP120 output stage simplified.

 2002 Microchip Technology Inc.

DS00820A-page 1

12 3 4 5 6 7 8

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与MCP120T-300DI/TO相关器件

型号	品牌	获取价格	描述	数据表
MCP120T-300FI	MICROCHIP	获取价格	Microcontroller Supervisory Circuit with Open Drain Output
MCP120T-300GI	MICROCHIP	获取价格	Microcontroller Supervisory Circuit with Open Drain Output
MCP120T-300HI	MICROCHIP	获取价格	Microcontroller Supervisory Circuit with Open Drain Output
MCP120T-300HI/TO	MICROCHIP	获取价格	IC,VOLT DETECTOR,FIXED,+2.93V,CMOS,SIP,3PIN,PLASTIC
MCP120T-300I/TT	MICROCHIP	获取价格	Microcontroller Supervisory Circuit with Open Drain Output
MCP120T-315DI	MICROCHIP	获取价格	Microcontroller Supervisory Circuit with Open Drain Output
MCP120T-315DI/TO	MICROCHIP	获取价格	IC,VOLT DETECTOR,FIXED,+3.08V,CMOS,SIP,3PIN,PLASTIC
MCP120T-315FI	MICROCHIP	获取价格	Microcontroller Supervisory Circuit with Open Drain Output
MCP120T-315GI	MICROCHIP	获取价格	Microcontroller Supervisory Circuit with Open Drain Output
MCP120T-315GI/TO	MICROCHIP	获取价格	IC,VOLT DETECTOR,FIXED,+3.08V,CMOS,SIP,3PIN,PLASTIC

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