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onsemi NCP300LSN21T1
- Part No.:
- NCP300LSN21T1
- Manufacturer:
- onsemi
- Category:
- Supervisors
- Package:
- -
- Datasheet:
-
NCP300LSN21T1.pdf
- Description:
- IC SUPERVISOR PWR SUP SUPPORT
- Quantity:
- Payment:
- Shipping:
Inventory:16,000
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Product details
Overview
NCP300LSN21T1 from onsemi is a complementary-output ultra-low-current voltage detector IC designed as a microprocessor reset controller in battery-powered portable systems. It features a 2.1 V ±2.0% accurate undervoltage detection threshold, 0.5 µA typical quiescent current, and operates from 0.8 V to 10 V supply. Its active-low reset output ensures reliable system initialization during brownout conditions in handheld medical devices and wearables.
For engineers reviewing the NCP300LSN21T1 datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specifications, TSOP-5 package details, reset timing behavior, and validated alternative options for low-power supervisory circuit design.
Technical Context
The NCP300LSN21T1 implements a precision bandgap-based comparator with built-in hysteresis (63 mV typ) to prevent oscillatory reset assertion near the 2.1 V threshold. Its complementary output stage integrates both P-channel source and N-channel sink drivers, enabling direct interface to logic inputs without external pull-ups.
It operates across −40°C to +85°C ambient temperature with input hysteresis and threshold stability characterized over temperature. The device uses a Thin TSOP-5 (Case 483) package and draws only 0.5 µA at 2.9 V input, making it suitable for always-on monitoring in energy-constrained applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Detector Threshold | 2.058 V to 2.142 V (±2.0% accuracy at 25°C; enables precise 2.1 V brownout detection) |
| Quiescent Current | 0.5 µA typical (extends battery life in always-on reset supervision) |
| Operating Voltage Range | 0.8 V to 10 V (supports single-cell Li-ion, multi-cell alkaline, and intermediate rail monitoring) |
| Output Type | Complementary (active-low reset with simultaneous Pch source/Nch sink capability) |
| Hysteresis | 63 mV typical (prevents chatter during slow-rising/falling supply transitions) |
| Propagation Delay | 55 ns tpHL / 108 ns tpLH (ensures fast, deterministic reset assertion/deassertion) |
| Package | Thin TSOP-5 (Case 483; 2.1 mm × 1.6 mm footprint, 1.1 mm height) |
Pinout & Package
Thin TSOP-5 package (Case 483), surface-mount, lead-free, 5-terminal configuration with exposed pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Reset Output | Complementary active-low output: sinks up to 2.0 mA (Nch) or sources up to 6.0 mA (Pch) at defined conditions |
| 2 | Input (VIN) | Undervoltage sense input; connects directly to monitored supply rail |
| 3 | No Connect | Internally unconnected; must be left floating or tied to GND per layout guidelines |
| 4 | No Connect | Internally unconnected; must be left floating or tied to GND per layout guidelines |
| 5 | GND | Ground reference for internal circuitry and output stage |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low supply current | 0.5 µA typical enables >10-year battery life in coin-cell–powered IoT endpoints |
| High threshold accuracy | ±2.0% tolerance ensures consistent reset point across production lots and temperature |
| Integrated hysteresis | 63 mV typical eliminates need for external feedback components in reset circuits |
| Complementary output drive | Eliminates external pull-up resistors and supports direct connection to CMOS/TTL inputs |
| Wide input voltage range | 0.8 V to 10 V operation allows use with sub-1V logic rails and higher-voltage system supplies |
Applications
| Portable Medical Monitors | Wearable Fitness Trackers |
|---|---|
|
Use Scenario: Continuous ECG/PPG sensing powered by CR2032 coin cell with strict power budget. IC Role / Device Role / Timing Role: Resets MCU when battery drops below 2.1 V to prevent data corruption during low-voltage operation. Use Value: 0.5 µA quiescent current extends usable battery life by >30% versus comparable detectors. |
Use Scenario: Always-on motion-sensing node using BLE SoC with intermittent wake cycles. IC Role / Device Role / Timing Role: Provides clean, chatter-free reset signal upon cold start or deep discharge recovery. Use Value: Complementary output drives SoC reset pin directly-no external resistor network required. |
| Industrial Handheld Scanners | Smart Home Sensors |
|
Use Scenario: Ruggedized barcode scanner operating from dual AA batteries across −20°C to 60°C. IC Role / Device Role / Timing Role: Supervises main 3.3 V rail and asserts reset if voltage sags below 2.1 V during motor activation. Use Value: 63 mV hysteresis prevents false resets during transient load-induced dips. |
Use Scenario: Battery-powered door/window sensor reporting via Zigbee or Matter stack. IC Role / Device Role / Timing Role: Monitors 3.0 V LDO output and triggers controlled shutdown before EEPROM write failure. Use Value: 2.1 V threshold aligns with minimum operating voltage of common low-power MCUs (e.g., nRF52840). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage detector applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G21DBVR | 2.1 V fixed threshold, 1.6 µA quiescent current, open-drain output | Requires external pull-up; higher IQ reduces battery lifetime in ultra-low-power designs | Preferred where TI ecosystem integration or adjustable delay is needed |
| MAX6373US21D3+ | 2.1 V threshold, 1.0 µA IQ, push-pull active-low output, wider temp range (−40°C to +125°C) | Higher cost and larger SOT23-5 footprint; better suited for automotive-adjacent industrial use | Chosen when extended junction temperature support or MIL-STD-883 qualification is required |
Compared with TPS3808G21DBVR and MAX6373US21D3+, the NCP300LSN21T1 delivers the lowest quiescent current (0.5 µA) in a compact TSOP-5 package while maintaining ±2.0% threshold accuracy-making it optimal for space- and energy-constrained portable electronics.
Availability
NCP300LSN21T1 is available at Aetrix Electronics and suitable for portable medical monitors, wearable fitness trackers, and industrial handheld scanners requiring stable component supply and long-term manufacturability.
Supply support for NCP300LSN21T1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
onsemi (formerly ON Semiconductor) is a global semiconductor supplier focused on energy-efficient innovation for automotive, industrial, cloud, and intelligent edge applications.
The NCP300 series belongs to onsemi's precision voltage supervisor product line, engineered specifically for ultra-low-power reset control in battery-operated portable electronics where extended runtime and high threshold accuracy are critical.
FAQ
What is the exact undervoltage detection threshold of the NCP300LSN21T1?
The NCP300LSN21T1 has a guaranteed detection threshold of 2.058 V (min) to 2.142 V (max) at 25°C, with ±2.0% accuracy across temperature and process variation. This 2.1 V nominal point is factory-trimmed and specified in Table 1 of the official datasheet (NCP300/D Rev. 14).
Does the NCP300LSN21T1 require an external pull-up resistor on its reset output?
No. The NCP300LSN21T1 features a complementary output stage with integrated P-channel source and N-channel sink drivers, eliminating the need for an external pull-up resistor. This simplifies PCB layout and reduces BOM count compared to open-drain alternatives like the NCP301 series.
What is the maximum supply voltage the NCP300LSN21T1 can monitor?
The NCP300LSN21T1 supports an input voltage range of 0.8 V to 10 V on Pin 2 (VIN). Its absolute maximum rating is 12 V, but continuous operation above 10 V is not recommended per the Electrical Characteristics table. For 12 V system rails, a resistive divider is required.
How does the hysteresis function in the NCP300LSN21T1, and what is its typical value?
The NCP300LSN21T1 incorporates internal hysteresis to prevent oscillatory reset behavior near the threshold. Hysteresis is defined as VHYS = VDET+ − VDET−, with a typical value of 63 mV (0.063 V). This ensures the reset deasserts at ~2.163 V after asserting at 2.1 V, providing noise immunity during slow supply ramps.
Is the NCP300LSN21T1 RoHS-compliant and lead-free?
Yes. The NCP300LSN21T1 is manufactured in Pb-free (lead-free) packaging per onsemi's compliance documentation and meets RoHS Directive 2011/65/EU. The TSOP-5 package uses matte tin lead finish and is rated MSL1 (moisture sensitivity level 1).
NCP300LSN21T1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- -
- Number of Voltages Monitored:
- -
- Voltage - Threshold:
- -
- Output:
- -
- Reset:
- -
- Reset Timeout:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
NCP300LSN21T1 FAQ
1.How can I place an order for NCP300LSN21T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP300LSN21T1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for NCP300LSN21T1 reliable?
The price and inventory of NCP300LSN21T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP300LSN21T1 is usually 5 days.
3.What payment methods are accepted for NCP300LSN21T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP300LSN21T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP300LSN21T1?
NCP300LSN21T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP300LSN21T1 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for NCP300LSN21T1?
For technical support, including NCP300LSN21T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP300LSN21T1 requirements.
6.How does Aetrix verify that NCP300LSN21T1 is sourced from the original manufacturer or authorized distributors?
All NCP300LSN21T1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that NCP300LSN21T1 meets industry standards.
7.What is the process for return or replacement of NCP300LSN21T1?
All NCP300LSN21T1 units undergo pre-shipment inspection (PSI). If there is an issue with NCP300LSN21T1, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The NCP300LSN21T1 part is unused and in its original packaging.
Return procedure for NCP300LSN21T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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