MCP120T-475HI/TO datasheet, PDF

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MCP120T-475HI/TO: DescriptionIC,VOLT DETECTOR,FIXED,+4.63V,CMOS,SIP,3PIN,PLASTIC; CategoryPower/power management The power supply circuit; File Size101KB，8 Pages; ManufacturerMicrochip; Websitehttps://www.microchip.com

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MCP120T-475HI/TO Overview

IC,VOLT DETECTOR,FIXED,+4.63V,CMOS,SIP,3PIN,PLASTIC

MCP120T-475HI/TO Parametric

Parameter Name	Attribute value
Is it Rohs certified?	incompatible
Maker	Microchip
Reach Compliance Code	compliant
ECCN code	EAR99
Adjustable threshold	NO
JESD-609 code	e0
Number of terminals	3
Maximum operating temperature	85 °C
Minimum operating temperature	-40 °C
Package body material	PLASTIC/EPOXY
Encapsulate equivalent code	SIP3,.1,50
power supply	1/5.5 V
Certification status	Not Qualified
Maximum supply current (Isup)	0.06 mA
surface mount	NO
technology	CMOS
Temperature level	INDUSTRIAL
Terminal surface	Tin/Lead (Sn/Pb)
Terminal pitch	1.27 mm
Terminal location	SINGLE
Threshold voltage nominal	+4.63V

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Author:

AN820

CIRCUITRY BACKGROUND

MCP120 Output Stage

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.

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

System Supervisors in ICSP

Architectures

Ken Dietz

Microchip Technology Inc.

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

(ICSP

), which can be implemented

for a variety of reasons, including field upgrades.

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

MCP120T-475HI/TO Related Products

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Description	IC,VOLT DETECTOR,FIXED,+4.63V,CMOS,SIP,3PIN,PLASTIC	IC,VOLT DETECTOR,FIXED,+2.93V,CMOS,TO-236,3PIN,PLASTIC	IC,VOLT DETECTOR,FIXED,+4.48V,CMOS,SIP,3PIN,PLASTIC	IC,VOLT DETECTOR,FIXED,+4.63V,CMOS,SIP,3PIN,PLASTIC	IC,VOLT DETECTOR,FIXED,+4.63V,CMOS,SIP,3PIN,PLASTIC	IC,VOLT DETECTOR,FIXED,+4.73V,CMOS,SIP,3PIN,PLASTIC	IC,VOLT DETECTOR,FIXED,+4.73V,CMOS,SIP,3PIN,PLASTIC	IC,VOLT DETECTOR,FIXED,+3.08V,CMOS,TO-236,3PIN,PLASTIC
Is it Rohs certified?	incompatible	conform to	incompatible	incompatible	incompatible	incompatible	incompatible	conform to
Maker	Microchip	Microchip	Microchip	Microchip	Microchip	Microchip	Microchip	Microchip
Reach Compliance Code	compliant	compliant	compliant	compliant	compliant	compliant	compliant	compliant
ECCN code	EAR99	EAR99	EAR99	EAR99	EAR99	EAR99	EAR99	EAR99
Adjustable threshold	NO	NO	NO	NO	NO	NO	NO	NO
Number of terminals	3	3	3	3	3	3	3	3
Maximum operating temperature	85 °C	85 °C	85 °C	85 °C	85 °C	85 °C	85 °C	85 °C
Minimum operating temperature	-40 °C	-40 °C	-40 °C	-40 °C	-40 °C	-40 °C	-40 °C	-40 °C
Package body material	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY
Encapsulate equivalent code	SIP3,.1,50	TO-236	SIP3,.1,50	SIP3,.1,50	SIP3,.1,50	SIP3,.1,50	SIP3,.1,50	TO-236
power supply	1/5.5 V	1/5.5 V	1/5.5 V	1/5.5 V	1/5.5 V	1/5.5 V	1/5.5 V	1/5.5 V
Certification status	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified
Maximum supply current (Isup)	0.06 mA	0.06 mA	0.06 mA	0.06 mA	0.06 mA	0.06 mA	0.06 mA	0.06 mA
surface mount	NO	YES	NO	NO	NO	NO	NO	YES
technology	CMOS	CMOS	CMOS	CMOS	CMOS	CMOS	CMOS	CMOS
Temperature level	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL
Threshold voltage nominal	+4.63V	+2.93V	+4.48V	+4.63V	+4.63V	+4.73V	+4.73V	+3.08V
JESD-609 code	e0	-	e0	e0	e0	e0	e0	-
Terminal surface	Tin/Lead (Sn/Pb)	-	Tin/Lead (Sn/Pb)	Tin/Lead (Sn/Pb)	Tin/Lead (Sn/Pb)	Tin/Lead (Sn/Pb)	Tin/Lead (Sn/Pb)	-
Terminal pitch	1.27 mm	-	1.27 mm	1.27 mm	1.27 mm	1.27 mm	1.27 mm	-
Terminal location	SINGLE	-	SINGLE	SINGLE	SINGLE	SINGLE	SINGLE	-

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