NCP803SN308T1G 3-Pin Microprocessor Reset Monitor

Product Overview

The MAX803/NCP803 is a cost−effective system supervisor circuit designed to monitor V_CC in digital systems and provide a reset signal to the host processor when necessary. No external components are required.

 

The reset output is driven active within 10 μsec of V_CC falling through the reset voltage threshold. Reset is maintained active for a timeout period which is trimmed by the factory after V_CC rises above the reset threshold. The MAX803/NCP803 has an open drain active−low RESET output. Both devices are available in SOT−23 and SC−70 packages.

 

The MAX803/NCP803 is optimized to reject fast transient glitches on the V_CC line. Low supply current of 0.5 μA (V_CC = 3.2 V) make these devices suitable for battery powered applications.

NCP803SN308T1G CAD Models

Figure: NCP803SN308T1G PCB Symbol

 

 

 

Figure: NCP803SN308T1G Footprint

 

 

 

Figure: NCP803SN308T1G 3D Models

 

NCP803SN308T1G Pin Configuration

Figure: NCP803SN308T1G Pin Configuration

 

NCP803SN308T1G Marking Diagram

Figure: NCP803SN308T1G Marking Diagram

xxx = Specific Device Code

M = Date Code

Microdot = Pb−Free Package

(Note: Microdot may be in either location)

 

NCP803SN308T1G Features

• Precision V_CCMonitor for 1.5 V, 2.5 V, 3.0 V, 3.3 V, and 5.0 VSupplies
• Precision Monitoring Voltages from 1.2 V to 4.9 V Availablein 100 mV Steps
• Four Guaranteed Minimum Power−On Reset Pulse WidthAvailable(1 ms, 20 ms, 100 ms, and 140 ms)
• RESET Output Guaranteed to V_CC= 1.0 V
• Low Supply Current
• V_CCTransient Immunity
• No External Components
• Wide Operating Temperature: −40°C to 105°C
• These Devices are Pb−Free and are  RoHS Compliant  

 

NCP803SN308T1G Typical Applications

• Computers
• Embedded Systems
• Battery Powered Equipment
• Critical Microprocessor Power Supply Monitoring

Figure: NCP803SN308T1G Typical Application Diagram

 

NCP803SN308T1G Typical Operating Characteristics

Figure: Supply Current vs. Supply Voltage

 

 

 

Figure: Normalized Reset Threshold Voltage vs. Temperature

 

 

 

Figure: Supply Current vs. Temperature

 

 

 

Figure: Output Voltage Low vs. Supply Voltage

 

 

 

Figure: Power−Down Reset Delay vs. Temperature and Overdrive (V_TH = 1.2 V)

 

 

 

Figure: Power−Down Reset Delay vs. Temperature and Overdrive (V_TH = 4.63 V)

 

 

 

Figure: Normalized Power−Up Reset vs. Temperature

 

NCP803SN308T1G Datasheet

You can download the datasheet from the link given below:

NCP803SN308T1G Datasheet

 

NCP803SN308T1G Specifications

Product Attribute	Attribute Value
Manufacturer:	onsemi
Product Category:	Supervisory Circuits
Type:	Voltage Supervisory
Mounting Style:	SMD/SMT
Package / Case:	SOT-23-3
Threshold Voltage:	3.08 V
Number of Inputs Monitored:	1 Input
Output Type:	Active Low, Open Drain
Manual Reset:	No Manual Reset
Watchdog Timers:	No Watchdog
Battery Backup Switching:	No Backup
Reset Delay Time:	460 ms
Supply Voltage - Max:	5.5 V
Operating Temperature:	-40°C ~ 105°C (TJ)
Series:	NCP803
Brand:	onsemi
Chip Enable Signals:	No Chip Enable
Features:	No Internal Hysteresis
Height:	0.94 mm
Length:	2.9 mm
Operating Supply Current:	800 nA
Overvoltage Threshold:	3.11 V
Power Fail Detection:	No
Product Type:	Supervisory Circuits
Subcategory:	PMIC - Power Management ICs
Supply Voltage - Min:	1 V
Undervoltage Threshold:	3.08 V
Width:	1.3 mm
Unit Weight:	0.000282 oz

 

NCP803SN308T1G Manufacturer

Onsemi is driving energy efficient innovations, empowering customers to reduce global energy use. The company offers a comprehensive portfolio of energy efficient power and signal management, logic, discrete and custom solutions to help design engineers solve their unique design challenges in automotive, communications, computing, consumer, industrial, LED lighting, medical, military/aerospace and power supply applications. onsemi operates a responsive, reliable, world-class supply chain and quality program, and a network of manufacturing facilities, sales offices and design centers in key markets throughout North America, Europe, and the Asia Pacific regions.

 

Using Warning

Note: Please check their parameters and pin configuration before replacing them in your circuit.

 

NCP803SN308T1G FAQ

What is microprocessor and its uses?

The microprocessor is the central unit of a computer system that performs arithmetic and logic operations, which generally include adding, subtracting, transferring numbers from one area to another, and comparing two numbers. It's often known simply as a processor, a central processing unit, or as a logic chip.

 

Is a microprocessor a CPU?

Though some IT administrators use CPU and microprocessor interchangeably, the reality is that most CPUs are microprocessors but not every microprocessor is a CPU. In the early days of IT, CPUs were a system's main workhorse as they handled a variety of computer commands that were often complex and time consuming.

 

What is a reset monitor?

A reset IC monitor is supply voltage and resets or turns off another device like a microprocessor if the supply voltage is low. These devices usually have a programmable output delay to prevent the system from returning from reset before the supply voltage is stable.