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HomeProductsIntegrated Circuits (ICs)PMIC - SupervisorsNCP300HSN30T1
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NCP300HSN30T1 - onsemi

Manufacturer Part Number
NCP300HSN30T1
Manufacturer
onsemi
Allelco Part Number
98D-NCP300HSN30T1
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
14,501 pcs available, New & Original
Parts Description
IC SUPERVISOR 1 CHANNEL 5TSOP
Package
5-TSOP
Data sheet
NCP300HSN30T1.pdf

PCN Obsolescence/ EOL

Cylindrical Battery Holders.pdf

HTML Datasheet

NCP300,301.pdf

Environmental Information

onsemi RoHS.pdf
RoHs Status
 
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Specifications

NCP300HSN30T1 Tech Specifications
onsemi - NCP300HSN30T1 technical specifications, attributes, parameters and parts with similar specifications to onsemi - NCP300HSN30T1

Product Attribute Attribute Value
Manufacturer onsemi
Voltage - Threshold 3V
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 RoHS non-compliant
Moisture Sensitivity Level (MSL) 1 (Unlimited)
REACH Status REACH Unaffected
ECCN EAR99
HTSUS 8542.39.0001

Frequently Asked Questions(FAQ)

How does the NCP300HSN30T1 supervisor IC compare to other voltage monitoring solutions in terms of threshold accuracy and stability under temperature variation?
The NCP300HSN30T1 features a fixed 3V threshold with typical hysteresis, providing consistent reset assertion during power-up and brownout conditions. Unlike adjustable-voltage supervisors, it does not require external resistors, reducing component count and potential tolerance stacking errors. Its internal bandgap reference ensures stable operation across the -40°C to 125°C range, making it suitable for automotive or industrial environments where thermal drift can impact voltage detection reliability. In comparison to similar single-channel supervisors like the MAX809, the NCP300HSN30T1 offers a more compact footprint (5-TSOT-23) and push-pull output configuration, which improves drive capability without additional buffering.
What are the key differences between the NCP300HSN30T1’s push-pull output and open-drain outputs found in competing supervisors such as the MIC803?
The NCP300HSN30T1 uses a push-pull (totem pole) output stage, enabling both active-high and active-low logic levels without external pull-up resistors—ideal for direct microcontroller interfacing or driving loads directly. In contrast, devices like the MIC803 typically feature open-drain outputs that require an external resistor to establish logic high. This makes the NCP300HSN30T1 more efficient in low-power applications and simplifies PCB layout by eliminating one passive component. However, open-drain variants offer better noise immunity in noisy systems due to their wired-OR capability, whereas push-pull outputs may generate higher electromagnetic interference (EMI) if not properly decoupled.
Can the NCP300HSN30T1 be used reliably in battery-powered systems where supply voltages fluctuate gradually during discharge?
Yes, but with design considerations. The NCP300HSN30T1 monitors only a single fixed threshold (3V), so it will trigger a reset whenever the input drops below 3V, regardless of whether this occurs due to sudden brownout or gradual battery decay. While effective for preventing operation below safe voltage levels, this behavior may cause unnecessary resets in applications like battery-operated sensors that briefly dip into the 2.8–3.0V range before stabilizing. For such use cases, pairing the NCP300HSN30T1 with a lower-threshold comparator or implementing software-based voltage tracking might yield better user experience, though at added complexity.
How does the operating temperature range of the NCP300HSN30T1 impact its suitability for industrial versus automotive applications?
With an extended operating range from -40°C to +125°C, the NCP300HSN30T1 meets stringent reliability standards common in industrial and automotive systems. Many consumer-grade supervisors are rated only up to 85°C or 105°C, limiting their deployment in harsh environments. The device’s robust internal circuitry ensures consistent threshold performance even at temperature extremes, which is critical for mission-critical systems where voltage supervision cannot fail. This broad thermal tolerance makes the NCP300HSN30T1 a viable choice for embedded controllers in factory automation, HVAC systems, or vehicle infotainment modules exposed to wide ambient swings.
What precautions should engineers take when integrating the NCP300HSN30T1 near sensitive analog components on the same PCB?
Due to its push-pull output switching characteristics, the NCP300HSN30T1 can introduce transient noise into nearby analog circuits during reset events. To mitigate coupling, maintain adequate spacing (>5 mm) from precision amplifiers, ADCs, or reference sources. Additionally, place a 100 nF ceramic capacitor close to the VCC pin to suppress high-frequency transients. Ground plane isolation techniques—such as splitting analog and digital grounds with a single connection point near the power entry—can further reduce interference. These practices help preserve measurement integrity in mixed-signal designs where accurate voltage regulation is essential.
Why might someone choose the NCP300HSN30T1 over integrated power management ICs that include built-in supervisory functions?
The NCP300HSN30T1 offers a minimalist approach ideal for cost-sensitive or space-constrained designs where full-featured PMICs would be overkill. By using this dedicated supervisor alongside existing regulators or microcontrollers, system designers avoid paying for unused features like sequencing, LDOs, or load switches. This modularity allows precise control over reset timing and simplifies debugging. Moreover, the small 5-TSOT package enables high-density layouts, making it preferable in portable electronics or modular subsystems where board area is limited and simplicity outweighs integration benefits.
Is the NCP300HSN30T1 suitable for use in systems requiring compliance with IEC 61000-4-2 ESD protection standards?
The datasheet does not specify explicit ESD immunity ratings, but as a general-purpose supervisor IC, it lacks the hardened input structures found in automotive-qualified parts. Therefore, while functional in most commercial environments, it may not survive direct air or contact discharge tests per IEC 61000-4-2 without additional protection circuitry—such as TVS diodes or RC filters—on the monitored line. Engineers deploying the NCP300HSN30T1 in ESD-sensitive applications should validate performance through pre-compliance testing or add external surge suppression to ensure robustness.
How does the lack of adjustable threshold affect system flexibility when using the NCP300HSN30T1 in non-standard voltage rails?
The fixed 3V threshold limits the NCP300HSN30T1 to applications where the primary supply rail aligns closely with this value. For systems using 5V, 1.8V, or custom rails, either a different part number from the NCP300 family (e.g., NCP300HSN18T1 for 1.8V) or an alternative supervisor must be selected. This rigidity reduces reusability across product lines but ensures optimal performance within its intended window. Designers should verify that the monitored voltage never approaches the threshold too closely during normal operation to avoid marginal triggering due to noise or ripple.
What role does the Moisture Sensitivity Level (MSL) rating play in the handling and storage of the NCP300HSN30T1?
Rated MSL 1 (unlimited shelf life), the NCP300HSN30T1 poses minimal risk during standard assembly processes. It can be stored indefinitely at room conditions without baking prior to reflow, unlike higher MSL components that require moisture evacuation under JEDEC J-STD-033 guidelines. This simplifies inventory management and reduces production downtime, especially beneficial in high-volume manufacturing where lead times and storage logistics are critical factors. However, proper handling still requires anti-static measures due to its CMOS construction, despite the benign moisture profile.
Can the NCP300HSN30T1 safely interface with 5V logic without level shifting?
No level shifting is required if the downstream device accepts 3.3V inputs. The active-high reset signal asserted by the NCP300HSN30T1 operates at the supply voltage (typically 2.5V–5.5V per datasheet), meaning it naturally drives 3.3V-compatible microcontrollers directly. However, feeding the output into legacy 5V-only logic without verifying input high-level thresholds risks undefined states. Always consult target device specifications; some older MCUs require minimum VIH of 0.7×VDD, which may necessitate a resistive divider or buffer if operating near the lower end of the supply range.
How does the absence of programmable features in the NCP300HSN30T1 influence long-term maintenance and field updates?
As a simple, non-programmable supervisor, the NCP300HSN30T1 lacks firmware-based configurability, meaning any changes to reset thresholds, timing, or response behavior require hardware replacement or redesign. This simplifies initial development but complicates lifecycle management for products deployed in remote locations where component obsolescence or specification evolution occurs. In contrast, digitally configurable PECs allow post-deployment tuning via software, offering adaptability absent in fixed-function devices like the NCP300HSN30T1. Thus, selection should reflect anticipated system longevity and update requirements.
What trade-offs exist between using the NCP300HSN30T1 versus a dedicated brown-out detection (BOD) block within modern SoCs?
Modern SoCs often integrate BOD circuits that can be programmed for multiple thresholds and delayed responses, offering superior flexibility compared to the NCP300HSN30T1’s single fixed action. However, relying solely on SoC BODs increases dependency on complex firmware and may delay reset propagation. Adding the NCP300HSN30T1 provides hardware-level redundancy, ensuring immediate shutdown during catastrophic failures before software even initializes. This layered approach enhances safety in boot-critical systems but adds cost and footprint—making it a strategic choice when deterministic, independent supervision is non-negotiable.
Does the RoHS non-compliant status of the NCP300HSN30T1 pose risks for global market distribution?
Yes, the RoHS non-compliant designation restricts deployment in markets mandating full halogen-free and lead-free materials, including the European Union and China. While acceptable in regions without strict regulations, inclusion of this component in consumer electronics could trigger customs delays or rejection during certification audits. Engineers should confirm final product compliance strategies early in development, considering alternate RoHS-compliant parts from the same family (e.g., NCP300HSN30T1G) if regulatory adherence is required.
How should PCB layout be optimized to maximize the reliability of the NCP300HSN30T1’s voltage monitoring function?
Place the NCP300HSN30T1 as close as possible to the main power rail input, minimizing trace inductance and resistance that could distort voltage sensing. Use short, wide traces between the monitored node and the IC’s VIN pin, and route analog return paths away from switching nodes. Decouple the VCC pin with a 100 nF X7R ceramic capacitor placed no more than 2 mm from the package leads. Avoid placing vias near signal pins to prevent ground loops. These practices ensure accurate threshold detection and prevent false resets caused by localized IR drop or capacitive coupling.
What happens if the supply voltage to the NCP300HSN30T1 exceeds its maximum rating during transient conditions?
Exceeding the absolute maximum VCC rating (typically 5.5V) risks irreversible damage to the internal ESD protection diodes and core logic. Even brief overvoltages can cause latch-up or dielectric breakdown, especially if combined with elevated temperatures. Although the device includes basic overvoltage safeguards, they are not designed for sustained exposure above spec limits. To protect against such events, implement clamping circuits (e.g., Zener diodes or transient suppressors) at the input and ensure power sequencing respects voltage ramp rates defined in the application notes.
In what scenarios would the NCP300HSN30T1 outperform multi-voltage monitoring ICs in terms of system simplicity?
When a system has only one primary supply rail that requires supervision—common in simple microcontrollers, sensor nodes, or legacy designs—the NCP300HSN30T1 delivers maximum simplicity with zero external components. Multi-voltage supervisors become necessary only when multiple rails need individual monitoring, which increases pin count, power consumption, and complexity. For single-supply applications where cost, board space, and ease of validation are priorities, the NCP300HSN30T1 provides an efficient, battle-tested solution without sacrificing functionality.
How does the package type (5-TSOT-23) affect thermal performance and soldering reliability compared to larger alternatives?
The compact 5-TSOT-23 package limits heat dissipation capability, making thermal management less critical for low-power supervisors like the NCP300HSN30T1. However, its small size demands precise solder joints to avoid opens or shorts, particularly in automated assembly. Reflow profiles must adhere strictly to IPC-JEDEC standards to prevent tombstoning or bridging. While offering excellent space savings, this package requires careful process control during manufacturing, especially in high-mix production environments where yield optimization is paramount.
What diagnostic capabilities does the NCP300HSN30T1 provide for system health monitoring beyond basic reset signaling?
Beyond asserting an active-high reset upon undervoltage, the NCP300HSN30T1 offers no additional diagnostic feedback. It lacks status registers, fault flags, or windowed watchdog integration. Consequently, system designers cannot distinguish between a genuine power failure and a momentary glitch unless paired with external logic or firmware polling. For enhanced diagnostics, consider combining the NCP300HSN30T1 with a microcontroller that samples the RESET pin state or implements periodic voltage checks using an ADC, trading hardware simplicity for richer telemetry.

Parts with Similar Specifications

The three parts on the right have similar specifications to onsemi NCP300HSN30T1

Product Attribute NCP300HSN30T1G NCP300HSN20T1 NCP300HSN09T1 NCP300HSN09T1G
Part Number NCP300HSN30T1G NCP300HSN20T1 NCP300HSN09T1 NCP300HSN09T1G
Manufacturer onsemi onsemi onsemi onsemi
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Reset - - - -
Type - - - -
Series - - - -
Voltage - Threshold - - - -
Number of Voltages Monitored - - - -
Mounting Type - Surface Mount Through Hole Surface Mount
Base Product Number - DAC34H84 MAX500 ADS62P42
Supplier Device Package - 196-NFBGA (12x12) 16-PDIP 64-VQFN (9x9)
Reset Timeout - - - -
Output - - - -
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad

NCP300HSN30T1 Datasheet PDF

Download NCP300HSN30T1 pdf datasheets and onsemi documentation for NCP300HSN30T1 - onsemi.

Datasheets
Cylindrical Battery Holders.pdf
PCN Obsolescence/ EOL
Cylindrical Battery Holders.pdf
HTML Datasheet
NCP300,301.pdf
Environmental Information
onsemi RoHS.pdf

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NCP300HSN30T1 Image

NCP300HSN30T1

onsemi
98D-NCP300HSN30T1

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