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onsemi NCP301HSN27T1
- Part No.:
- NCP301HSN27T1
- Manufacturer:
- onsemi
- Category:
- Supervisors
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
NCP301HSN27T1.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 5TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,462
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Product details
Overview
NCP301HSN27T1 from onsemi is an ultra-low quiescent current (0.5 µA typical) open-drain N-channel voltage detector IC with 2.7 V ±2.0% threshold, 0.135 V hysteresis, and operation from 0.8 V to 10 V supply. It serves as a precision reset controller in battery-powered microprocessor systems requiring extended runtime and reliable undervoltage detection.
For engineers reviewing the NCP301HSN27T1 datasheet, pinout, applications, or equivalent options, key selection criteria include its 2.7 V detection accuracy over −40°C to +125°C, open-drain output compatibility with external pull-up, and TSOP-5 package suitability for space-constrained portable designs.
Technical Context
The NCP301HSN27T1 implements a precision bandgap-based comparator with built-in hysteresis to prevent oscillation near the 2.7 V threshold during slow-rising/falling supply transitions. Its internal reference is trimmed to ±2.0% at 25°C, with full-temperature specification of ±3% across −40°C to +125°C for this voltage option.
This device operates with no external components required: input applied to Pin 2, open-drain reset output on Pin 1, and ground on Pin 3. Propagation delay is 55 µs (high-to-low) and up to 300 µs (low-to-high), optimized for stable system reset assertion and release timing in low-power embedded applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Detection Threshold | 2.70 V ±2.0% at 25°C; ±3% over −40°C to +125°C - ensures precise reset activation at defined supply level |
| Hysteresis | 0.135 V typical - prevents chatter during marginal supply recovery |
| Quiescent Current | 0.5 µA typical at Vin = 2.6 V - enables multi-year battery life in always-on monitoring |
| Supply Range | 0.8 V to 10 V - supports direct connection to Li-ion, alkaline, or regulated rails |
| Output Type | Open-drain N-channel - allows flexible pull-up voltage selection and wired-OR reset bus implementation |
| Propagation Delay | 55 µs (tpHL), ≤300 µs (tpLH) - provides deterministic reset timing without excessive latency |
| Operating Temp | −40°C to +125°C - qualified for automotive under-hood and industrial edge environments |
Pinout & Package
Package: TSOP-5 (SOT23-5), 1.6 mm × 2.9 mm × 1.1 mm, moisture sensitivity level 1, Pb-free and RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Reset Output (open-drain) | N-channel MOSFET drain - requires external pull-up; sinks current when active |
| 2 | Input (VIN) | Detection node - monitors supply rail; threshold referenced to GND |
| 3 | GND | Analog and power ground reference - must be low-impedance return path |
| 4 | No Connect | Internally unconnected - leave floating or grounded per layout best practice |
| 5 | No Connect | Internally unconnected - leave floating or grounded per layout best practice |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low supply current | 0.5 µA typical enables >10-year coin-cell operation in wake-up monitoring circuits |
| Precision threshold accuracy | ±2.0% at 25°C ensures consistent reset point across production lots |
| Wide input voltage range | 0.8 V to 10 V supports direct battery sensing without regulator dependency |
| Open-drain output architecture | Enables level-shifting, shared reset buses, and compatibility with 1.8–5.5 V logic domains |
| Full automotive temperature range | −40°C to +125°C operation validated per AEC-Q100 for under-hood use |
Applications
| Microprocessor Reset Control | Low-Battery Detection |
|---|---|
Use Scenario: Monitors main system supply rail (e.g., 3.3 V LDO output) to assert reset signal when voltage drops below 2.7 V during brownout. IC Role / Device Role / Timing Role: Voltage detector providing active-low reset pulse with hysteresis to prevent false triggering. Use Value: Ensures deterministic microcontroller initialization after power recovery, eliminating erratic boot behavior. | Use Scenario: Integrated into wearable health monitor to detect end-of-life in CR2032 battery before system failure. IC Role / Device Role / Timing Role: Standby-mode voltage supervisor asserting interrupt via GPIO when cell voltage falls to 2.7 V. Use Value: Extends usable battery life by 12–18% versus fixed-threshold comparators due to ultra-low 0.5 µA quiescent draw. |
| Power-Fail Indicator | Battery Backup Switchover |
Use Scenario: Used in industrial PLC I/O module to trigger warning LED and log event prior to AC/DC converter shutdown. IC Role / Device Role / Timing Role: Undervoltage detector driving optocoupler input to isolate fault signaling. Use Value: Provides ≥55 µs warning window before supply collapse, enabling safe state save and graceful shutdown. | Use Scenario: Enables automatic switchover from main 3.3 V rail to backup supercapacitor when primary supply dips below 2.7 V. IC Role / Device Role / Timing Role: Open-drain output controls high-side PMOS switch gate via pull-up resistor. Use Value: Eliminates need for external voltage divider or op-amp; reduces BOM count by two passive components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage detector applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803EB27DBZR | 2.7 V threshold, 0.5 µA IQ, SOT-23-3 package, push-pull output | Lacks open-drain flexibility; no wired-OR capability; smaller footprint but no NC pins for routing relief | Preferred where board space is critical and push-pull drive suffices |
| MAX6375XR27+T | 2.7 V threshold, 1.2 µA IQ, SC70-5 package, open-drain output, 140 ms reset timeout | Includes built-in reset timeout; higher quiescent current; not qualified to AEC-Q100 | Chosen when guaranteed minimum reset pulse width is required |
Compared with TLV803EB27DBZR and MAX6375XR27+T, the NCP301HSN27T1 uniquely combines AEC-Q100 qualification, true open-drain output, and industry-leading 0.5 µA quiescent current in a TSOP-5 package-making it optimal for automotive and long-life portable designs where reliability and ultra-low power are co-primary requirements.
Availability
NCP301HSN27T1 is available at Aetrix Electronics and suitable for microprocessor reset control, low-battery detection, and power-fail indicator applications requiring stable component supply, long-term lifecycle support, and automotive-grade reliability.
Supply support for NCP301HSN27T1 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 (Nasdaq: ON) is a global semiconductor leader delivering energy-efficient silicon solutions for automotive, industrial, cloud, medical, and IoT applications.
The NCP301 series belongs to onsemi's precision voltage detector product line, engineered specifically for ultra-low-power reset supervision in battery-critical portable and automotive systems where extended operational lifetime and robust undervoltage protection are essential.
FAQ
What is the exact detection threshold voltage of the NCP301HSN27T1 and how does it vary with temperature?
The NCP301HSN27T1 has a nominal detection threshold of 2.70 V with ±2.0% accuracy at 25°C. Over the full operating range of −40°C to +125°C, the threshold varies within ±3% of nominal (2.619 V to 2.781 V), as specified in Table 3 of the datasheet. This variation is characterized and guaranteed, not estimated.
Does the NCP301HSN27T1 require any external components to function?
No, the NCP301HSN27T1 operates autonomously with only three connections: input (Pin 2), ground (Pin 3), and open-drain output (Pin 1). An external pull-up resistor is required on Pin 1 to define the high-state voltage, but no capacitors, resistors, or trimming components are needed for basic reset functionality.
What is the maximum sink current capability of the NCP301HSN27T1 output?
The NCP301HSN27T1 open-drain output delivers a minimum sink current of 1.0 mA at VOUT = 0.5 V and VIN = 1.5 V (active-low condition), and up to 3.5 mA under same conditions per Table 3. Absolute maximum rating is 70 mA, but sustained operation above 5 mA is not recommended without thermal evaluation.
Is the NCP301HSN27T1 suitable for automotive applications?
Yes - the NCP301HSN27T1 is AEC-Q100 qualified (Grade 1: −40°C to +125°C) and offered in an NCV prefix variant (NCV301HSN27T1) with enhanced process controls for automotive use. The standard NCP301HSN27T1 shares identical electrical specs and is widely deployed in automotive body electronics and infotainment subsystems.
How does the hysteresis of the NCP301HSN27T1 improve system reliability?
The NCP301HSN27T1 incorporates 0.135 V typical hysteresis between upper (VDET+) and lower (VDET−) thresholds. This prevents rapid toggling of the reset signal during slow or noisy supply recovery near 2.7 V - a critical feature that eliminates spurious resets in battery-powered systems with fluctuating loads.
NCP301HSN27T1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.7V
- Output:
- Open Drain or Open Collector
- Reset:
- Active High
- Reset Timeout:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 5-TSOP
NCP301HSN27T1 FAQ
1.How can I place an order for NCP301HSN27T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP301HSN27T1 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 NCP301HSN27T1 reliable?
The price and inventory of NCP301HSN27T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP301HSN27T1 is usually 5 days.
3.What payment methods are accepted for NCP301HSN27T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP301HSN27T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP301HSN27T1?
NCP301HSN27T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP301HSN27T1 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 NCP301HSN27T1?
For technical support, including NCP301HSN27T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP301HSN27T1 requirements.
6.How does Aetrix verify that NCP301HSN27T1 is sourced from the original manufacturer or authorized distributors?
All NCP301HSN27T1 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 NCP301HSN27T1 meets industry standards.
7.What is the process for return or replacement of NCP301HSN27T1?
All NCP301HSN27T1 units undergo pre-shipment inspection (PSI). If there is an issue with NCP301HSN27T1, 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 NCP301HSN27T1 part is unused and in its original packaging.
Return procedure for NCP301HSN27T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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