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HomeProductsIntegrated Circuits (ICs)PMIC - SupervisorsNCP300HSN18T1G
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NCP300HSN18T1G - onsemi

Manufacturer Part Number
NCP300HSN18T1G
Manufacturer
onsemi
Allelco Part Number
32D-NCP300HSN18T1G
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
12,650 pcs available, New & Original
Parts Description
IC SUPERVISOR 1 CHANNEL 5TSOP
Package
5-TSOP
Data sheet
NCP300HSN18T1G.pdf

PCN Packaging

2.73KHz.pdf

HTML Datasheet

NCP300,301.pdf

PCN Obsolescence/ EOL

Cylindrical Battery Holders.pdf

PCN Assembly/Origin

2.73KHz.pdf
RoHs Status
ROHS3 Compliant
Compare
Our certification
In stock: 12650
  • Unit Price: $0.11
  • Subtotal: $0.00

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Quantity Unit Price Ext. Price
1+ $0.11 $0.11
200+ $0.042 $8.40
500+ $0.041 $20.50
1000+ $0.04 $40.00
The above prices does not include taxes and freight rates, which will be calculated on the order pages.

Specifications

NCP300HSN18T1G Tech Specifications
onsemi - NCP300HSN18T1G technical specifications, attributes, parameters and parts with similar specifications to onsemi - NCP300HSN18T1G

Product Attribute Attribute Value
Manufacturer onsemi
Voltage - Threshold 1.8V
Type Simple Reset/Power-On Reset
Supplier Device Package 5-TSOP
Series -
Reset Timeout -
Reset Active High
Product Attribute Attribute Value
Package / Case SOT-23-5 Thin, TSOT-23-5
Package Tape & Reel (TR)
Output Push-Pull, Totem Pole
Operating Temperature -40°C ~ 125°C (TA)
Number of Voltages Monitored 1
Mounting Type Surface Mount
Base Product Number NCP300

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status ROHS3 Compliant
Moisture Sensitivity Level (MSL) 1 (Unlimited)
REACH Status REACH Unaffected
ECCN EAR99
HTSUS 8542.39.0001

Parts Introduction

NCP300HSN18T1G Image
NCP300HSN18T1G (1)

Manufacturer Part Number

NCP300HSN18T1G

Manufacturer

onsemi

Introduction

The NCP300HSN18T1G is a simple reset/power-on reset (POR) supervisor from onsemi. It monitors a single supply voltage and generates an active-high reset signal when the monitored voltage falls below the specified threshold. This device is well-suited for various applications that require reliable power-on reset and system protection.

Product Features and Performance

Monitors a single supply voltage with a 1.8V threshold

Push-pull, totem-pole output for the reset signal

Active-high reset output

Wide operating temperature range of -40°C to +125°C

Small surface-mount SOT-23-5 and TSOT-23-5 packages

Product Advantages

Provides reliable power-on reset and system protection

Compact surface-mount package options

Wide operating temperature range for diverse applications

Key Reasons to Choose This Product

Robust power-on reset functionality to ensure proper system initialization

Space-saving surface-mount packaging options

Broad temperature range for use in a variety of environments

Quality and Safety Features

Designed and manufactured to onsemi's high-quality standards

Ensures reliable system operation and protection against power-related issues

Compatibility

Suitable for a wide range of electronic systems and applications that require power-on reset functionality

Application Areas

Ideal for use in various electronic devices, including industrial controls, consumer electronics, and embedded systems

Product Lifecycle

["This product is currently in the Obsolete status, indicating that it is no longer in active production.","Customers should consult with our website's sales team for information on alternative or equivalent products that may be available."]

Frequently Asked Questions(FAQ)

How does the NCP300HSN18T1G compare to other voltage supervisors in terms of threshold accuracy and reset timing for low-voltage digital systems?
The NCP300HSN18T1G provides a fixed 1.8V threshold with typical accuracy within ±2%, making it suitable for tightly regulated power rails in microcontrollers and SoCs. Unlike adjustable supervisors, it eliminates external resistor network design complexity while maintaining precision across the full operating temperature range (-40°C to 125°C). Its push-pull output enables direct drive capability without additional buffering, reducing component count compared to open-drain alternatives like the NCP301 series. However, it lacks programmable delay settings, so applications requiring controlled reset sequencing must implement external RC networks.
What are the key differences between the NCP300HSN18T1G and similar single-channel supervisors such as the MIC803 or TPS3823 when used in battery-powered IoT devices?
While all three devices serve similar supervisory functions, the NCP300HSN18T1G offers superior integration density through its 5-pin TSOT-23 package, saving board space critical for compact IoT designs. Unlike the MIC803 which supports multiple thresholds, the NCP300HSN18T1G’s fixed 1.8V threshold simplifies layout but requires careful supply rail planning. Compared to the TPS3823, which has a longer minimum reset timeout (140ms vs unspecified here), the NCP300HSN18T1G may provide faster response but could risk premature resets during brief brownouts unless system logic accommodates shorter assertion times.
Can the NCP300HSN18T1G be safely used in automotive applications requiring AEC-Q100 qualification?
Although the NCP300HSN18T1G operates over an industrial temperature range (-40°C to 125°C), it is not officially qualified under AEC-Q100 standards. Automotive designs demanding functional safety certification should consider alternative parts from onsemi’s automotive-grade portfolio such as the NCP302 series. That said, in non-critical automotive peripherals where environmental stress testing suffices, the device may still be viable provided derating practices account for thermal and electrical margin reductions.
What input voltage conditions will cause the NCP300HSN18T1G to assert its reset signal?
The supervisor asserts a high-level reset when the monitored voltage drops below its 1.8V ±2% threshold. This includes scenarios such as initial power-up ramp below threshold, sustained undervoltage events, or rapid dips caused by load transients. Once asserted, the push-pull output maintains a stable high state until the supply exceeds the upper threshold hysteresis window (typically around 100mV above VTH). During normal operation above 1.96V (assuming +2% tolerance), the output deasserts to low, allowing downstream circuits to initialize properly.
How does package thermal performance affect reliability when using the NCP300HSN18T1G in high-density PCB layouts?
The 5-TSOP package exhibits moderate thermal conductivity due to its small footprint and lead configuration. In densely populated boards, adjacent components can create localized heating that elevates junction temperatures beyond ambient. For continuous operation near 125°C, ensure adequate copper pour area and airflow to maintain safe thermal margins. Given this device’s low quiescent current (<1µA), self-heating effects are minimal, but shared heat paths from nearby power devices remain a consideration in harsh environments.
Is it possible to cascade multiple NCP300HSN18T1G units to monitor multiple supply rails simultaneously?
No, because each NCP300HSN18T1G monitors only one fixed 1.8V rail. To supervise multiple voltages, designers must use separate supervisor ICs per rail—either identical models with different thresholds if available, or mix-and-match with complementary devices like the NCP302 for adjustable thresholds. Cascading isn’t feasible since outputs are mutually exclusive; asserting any supervisor would trigger all reset lines depending on wiring topology, defeating intended isolation.
What precautions should be taken when connecting the NCP300HSN18T1G’s output to a microcontroller’s reset pin?
Direct connection is acceptable due to its push-pull architecture, but ensure the MCU’s reset pin has a pull-down resistor (e.g., 10kΩ) to guarantee clean low-state assertion if the supervisor fails. Avoid long traces between IC and MCU to prevent noise pickup affecting reset integrity. Additionally, verify that the supervisor’s maximum sink/source current (typically 20mA) meets the MCU’s input hysteresis requirements to avoid oscillation during marginal voltage conditions.
How does moisture sensitivity level (MSL 1) influence storage and handling procedures for the NCP300HSN18T1G?
With MSL 1 classification, the NCP300HSN18T1G is considered moisture-resistant and can withstand unlimited exposure to ambient humidity during storage without baking prior to reflow. However, standard IPC guidelines recommend keeping parts in sealed dry packaging until use to preserve solderability. Even though no special handling is mandated, consistent adherence to ESD protocols during assembly remains essential given its sensitive CMOS internals.
Can the NCP300HSN18T1G replace discrete transistor-based reset circuits in legacy designs?
Yes, especially in modern low-power systems where analog discretes consume more current and occupy greater board area. The integrated supervisor reduces BOM count, improves consistency across production batches, and simplifies calibration. However, legacy designs relying on comparator-based feedback loops may require revalidation of timing characteristics since the NCP300HSN18T1G lacks external hysteresis control, potentially leading to chatter in noisy environments without proper decoupling.
What role does the totem pole output play in system initialization compared to open-drain configurations?
The push-pull, totem pole output actively drives both high and low states, ensuring deterministic reset signaling regardless of external load conditions. This contrasts with open-drain outputs that rely on pull-up resistors, introducing variable rise times and susceptibility to leakage currents. For microcontrollers needing fast, reliable reset assertions, the NCP300HSN18T1G’s active drive minimizes initialization delays and avoids metastability issues common in weakly pulled-up lines.
Are there any known limitations regarding supply ramp rate when powering up circuits with the NCP300HSN18T1G?
The device responds instantaneously to voltage changes above/below threshold, so very slow ramp rates (>100ms) may result in extended reset assertion periods, delaying system startup. Conversely, extremely fast ramps (>1V/μs) pose no issue. If the power supply exhibits droop during inrush, the supervisor will react accordingly. Designers should simulate worst-case ramp profiles using SPICE models to confirm sufficient margin between supply trajectory and hysteresis band.
How does the RoHS3 compliance status impact material selection for high-reliability medical applications?
RoHS3 compliance indicates adherence to EU Directive 2011/65/EU plus the Delegated Act covering PFAS restrictions. For medical devices, this ensures halogen-free and phthalate-free materials, aligning with stricter environmental and biocompatibility standards. While not a substitute for ISO 13485 certification, it reduces regulatory risk in global markets and supports sustainable manufacturing practices expected in healthcare supply chains.
What trade-offs exist between using the NCP300HSN18T1G versus a fully programmable supervisor like the MAX809T?
The NCP300HSN18T1G sacrifices flexibility for simplicity and cost savings—it cannot adjust threshold voltage or delay duration. Programmable supervisors allow fine-tuning for unique system requirements but add complexity, calibration overhead, and potential failure points. For standardized 1.8V rails in mass-produced consumer electronics, the fixed-threshold approach offers better yield predictability and lower unit cost, whereas custom applications benefit from tunable parameters offered by MAX family devices.
Does the NCP300HSN18T1G require external capacitors for stable operation?
No external filtering capacitors are necessary for basic functionality since internal circuitry provides sufficient stability. However, adding a 0.1μF ceramic capacitor between VCC and GND within 5mm of the package improves noise immunity in electrically noisy environments. Such decoupling mitigates transient-induced false resets caused by switching regulators or digital glitches.
How does the absence of a specified reset timeout affect system-level timing budgets?
Without a guaranteed minimum timeout, designers must assume immediate release once VCC exceeds threshold, potentially causing race conditions during partial power-up sequences. To enforce minimum reset duration, insert an external RC network at the output: choose R = 10kΩ and C = 1μF to achieve ~10ms hold time, ensuring downstream logic completes initialization before release. Always validate timing with actual hardware under worst-case conditions.
What considerations apply when sourcing the NCP300HSN18T1G from distributors with varying lead times?
Given its widespread adoption, availability is generally strong, but regional supply chain disruptions can impact delivery schedules. Cross-reference inventory levels across major distributors and consider dual-sourcing strategies if production volumes warrant redundancy. Monitor obsolescence notices from onsemi, as the broader NCP300 base product line may see lifecycle transitions affecting derivative variants.
How does the ECCN code (EAR99) influence export controls for international projects?
EAR99 classification means the NCP300HSN18T1G is subject to U.S. Export Administration Regulations but generally exempt from licensing requirements for commercial end-use. Still, verify final destination country regulations, as some regions impose additional restrictions on semiconductor imports. Maintain documentation showing intended application (e.g., non-military consumer electronics) to support compliance filings during audits.
What steps should be taken to verify correct operation during prototype validation of systems using the NCP300HSN18T1G?
Begin by measuring threshold accuracy with a calibrated DVM across temperature extremes. Then perform dynamic tests: inject controlled voltage dips below 1.8V and confirm reset assertion, followed by gradual recovery to observe clean deassertion. Use an oscilloscope to check output slew rates and ensure compatibility with MCU reset specifications. Finally, stress-test under combined thermal-electrical conditions to uncover latent failures missed in lab environments.

Parts with Similar Specifications

The three parts on the right have similar specifications to onsemi NCP300HSN18T1G

Product Attribute NCP300HSN18T1 NCP300HSN28T1 NCP300HSN09T1G NCP300HSN45T1G
Part Number NCP300HSN18T1 NCP300HSN28T1 NCP300HSN09T1G NCP300HSN45T1G
Manufacturer onsemi onsemi onsemi onsemi
Voltage - Threshold - - - -
Reset Timeout - - - -
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Base Product Number - DAC34H84 MAX500 ADS62P42
Number of Voltages Monitored - - - -
Type - - - -
Reset - - - -
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Series - - - -
Output - - - -
Mounting Type - Surface Mount Through Hole Surface Mount
Supplier Device Package - 196-NFBGA (12x12) 16-PDIP 64-VQFN (9x9)
Package - Tape & Reel (TR) Tube Tape & Reel (TR)

NCP300HSN18T1G Datasheet PDF

Download NCP300HSN18T1G pdf datasheets and onsemi documentation for NCP300HSN18T1G - onsemi.

Datasheets
Cylindrical Battery Holders.pdf
PCN Packaging
2.73KHz.pdf
HTML Datasheet
NCP300,301.pdf
Environmental Information
Material Declaration NCP300HSN18T1G.pdf onsemi REACH.pdf onsemi RoHS.pdf
PCN Obsolescence/ EOL
Cylindrical Battery Holders.pdf
PCN Assembly/Origin
2.73KHz.pdf

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2.00kg-3.00kg USD$50.00 - USD$100.00
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NCP300HSN18T1G Image

NCP300HSN18T1G

onsemi
32D-NCP300HSN18T1G

Want a better price? Add to Cart and Submit RFQ now, we'll contact you immediately.

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