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onsemi NCP302LSN47T1
- Part No.:
- NCP302LSN47T1
- Manufacturer:
- onsemi
- Category:
- Supervisors
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
NCP302LSN47T1.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 5TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,179
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Product details
Overview
NCP302LSN47T1 from onsemi is an ultra-low-current voltage detector IC with programmable delay, designed as a microprocessor reset controller for portable systems. It features a 4.7 V ±2.35% detection threshold (VDET−), 0.141–0.329 V hysteresis, 0.34 µA typical supply current at low input voltage, and operates from −40°C to +125°C. Used in battery-powered embedded systems requiring precise undervoltage monitoring and controlled reset release timing.
For engineers reviewing the NCP302LSN47T1 datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, TSOP-5 package details, complementary output behavior, temperature-stable threshold performance, and real-world use cases including low-battery detection and power-fail indication in industrial and automotive-grade designs.
Technical Context
The NCP302LSN47T1 implements a precision bandgap-based voltage detector with built-in hysteresis to prevent oscillation during threshold crossing. Its internal time-delay generator uses an external capacitor (CD) charged through a 1 MΩ pullup resistor (RD) and discharged via an N-channel MOSFET when Vin drops below VDET−.
This architecture enables two distinct delay intervals: tD1 (reset assertion delay, ~seconds range) and tD2 (reset deassertion delay, ~milliseconds range), both programmable via CD value and directly traceable to VTCD ≈ 0.67 × Vin at Pin 5. The device supports active-low complementary output with Pch source and Nch sink capability up to 10.5 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Detection Threshold (VDET−) | 4.606 V (min) to 4.794 V (max) at 25°C; ±3% over −40°C to +125°C - ensures reliable reset activation across wide temperature and supply variation |
| Hysteresis (VHYS) | 0.141 V (min) to 0.329 V (max) - prevents chatter during slow-rising/falling supply transitions |
| Supply Current (Iin) | 0.34 µA typical at Vin = 4.54 V - enables multi-year battery life in always-on monitoring applications |
| Operating Voltage Range | 0.8 V to 10 V - supports direct connection to Li-ion, NiMH, and regulated 3.3 V/5 V rails without external biasing |
| Output Drive Capability | Pch source: 1.5 mA (min) to 10.5 mA (typ) at Vin = 8.0 V; Nch sink: 0.05 mA (min) to 2.0 mA (typ) - sufficient to drive standard logic inputs and small FET gates |
| Delay Capacitor Pin (Pin 5) | VTCD = 2.59 V (min) to 4.40 V (max) at Vin = 5.17 V; RD = 0.5–2.0 MΩ - defines programmable reset release timing with external capacitor |
| Temperature Range | −40°C to +125°C - qualified for under-hood automotive and industrial control environments |
Pinout & Package
Package: TSOP-5 (SOT-23-5), case 483 - surface-mount, 5-pin, 1.6 mm × 2.9 mm footprint with 0.95 mm pitch, suitable for high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Reset Output | Complementary active-low output: high-Z when inactive, drives low (Nch sink) or high (Pch source) during reset assertion |
| 2 | Input (Vin) | Main supply voltage sense node - connected directly to monitored rail; threshold accuracy referenced here |
| 3 | No Connect (N.C.) | Internally unconnected; must be left floating or tied to GND per layout best practice |
| 4 | GND | Analog and digital ground reference - requires low-impedance connection to system ground plane |
| 5 | CD (Delay Capacitor) | Charge/discharge node for external timing capacitor - controls reset release delay (tD1) and assertion delay (tD2) |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 0.34 µA typical at 4.54 V - extends battery runtime in always-on monitoring circuits |
| Programmable reset delay | External CD capacitor sets tD1 (release) from ~10 ms to >10 s - eliminates need for discrete RC timing networks |
| High-accuracy detection threshold | ±2.35% at 25°C, ±3% over full temperature range - reduces margining overhead in power-rail design |
| Complementary output stage | Integrated Pch/Nch pair enables direct interface to both high- and low-active reset inputs without external inverters |
| Automotive qualification | NCV prefix variant available; AEC-Q100 qualified - supports functional safety requirements in vehicle ECUs |
Applications
| Microprocessor Reset Control | Low-Battery Detection |
|---|---|
Use Scenario: Monitors main 5 V supply rail in a portable data logger powered by dual AA batteries with boost converter. IC Role / Device Role / Timing Role: Voltage detector and programmable delay generator - asserts reset when Vin falls below 4.7 V and holds it for 200 ms after recovery to prevent brownout-induced MCU lockup. Use Value: Eliminates need for discrete comparator + timer IC, reducing BOM count and PCB area while improving threshold stability vs. resistor-divider-based solutions. | Use Scenario: Integrated into a handheld medical sensor that alerts users when battery voltage drops below safe operating level. IC Role / Device Role / Timing Role: Undervoltage monitor with hysteresis - triggers LED warning 30 seconds before shutdown, using CD capacitor to set delay independent of MCU firmware. Use Value: Provides deterministic, hardware-based battery alert timing unaffected by software crashes or sleep-mode entry latency. |
| Power-Fail Indicator | Battery Backup Switchover |
Use Scenario: Embedded in industrial PLC I/O module to detect AC/DC adapter failure and initiate graceful shutdown sequence. IC Role / Device Role / Timing Role: Precision threshold detector - activates fail signal when 24 V rail drops below 22.5 V (4.7 V × 4.79), with 100 ms tD2 delay to filter noise. Use Value: Prevents false triggers from transient dips, ensuring only sustained failures initiate backup power transfer or logging. | Use Scenario: Controls switchover between main 3.3 V supply and coin-cell backup in real-time clock (RTC) circuitry. IC Role / Device Role / Timing Role: Dual-threshold monitor - asserts reset on main rail collapse and releases after CD-charged delay to allow clean handoff to backup domain. Use Value: Guarantees uninterrupted RTC operation during supply transition without requiring complex power sequencing logic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage detector applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803EB29DBZR | Fixed 2.93 V threshold; no programmable delay; SOT-23-3 package; 0.5 µA Iq | Lacks CD pin and delay functionality - suitable only for simple reset-without-timing needs | Select when minimal BOM count and fixed threshold suffice; avoid if delay programming or 4.7 V detection is required. |
| MAX6326LUR47+T | 4.63 V threshold; fixed 140 ms delay; SOT-23-3; 1.6 µA Iq; no complementary output | Open-drain only; non-programmable delay; higher quiescent current limits battery life | Choose for drop-in replacement where fixed delay and open-drain interface are acceptable; not suitable for Pch/Nch drive or custom timing. |
Compared with TLV803EB29DBZR and MAX6326LUR47+T, the NCP302LSN47T1 uniquely combines 4.7 V precision detection, externally programmable delay, complementary output drive, and sub-0.4 µA quiescent current - making it optimal for space-constrained, long-life, and timing-critical reset applications where flexibility and efficiency are mandatory.
Availability
NCP302LSN47T1 is available at Aetrix Electronics and suitable for microprocessor reset control, low-battery detection, and power-fail indication requiring stable component supply, automotive-grade reliability, and long-term production continuity.
Supply support for NCP302LSN47T1 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, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The NCP302 series belongs to onsemi's precision analog voltage supervisor product line, engineered specifically for ultra-low-power, high-accuracy reset and monitoring functions in battery-sensitive and thermally demanding environments.
FAQ
What is the detection threshold voltage of the NCP302LSN47T1?
The NCP302LSN47T1 has a nominal detection threshold (VDET−) of 4.7 V, with a guaranteed range of 4.606 V (min) to 4.794 V (max) at +25°C. Over the full operating temperature range (−40°C to +125°C), the threshold remains within ±3% of nominal, i.e., 4.559 V to 4.841 V. This tight tolerance ensures consistent reset behavior across environmental conditions without external calibration.
Does the NCP302LSN47T1 support programmable reset delay?
Yes, the NCP302LSN47T1 supports fully programmable reset delay via an external capacitor connected to Pin 5 (CD). The internal 1 MΩ pullup resistor (RD) charges CD after supply recovery, and the reset release time (tD1) scales logarithmically with capacitance - ranging from ~10 ms (100 pF) to >10 s (10 µF). This eliminates the need for discrete timers and allows precise tailoring of reset hold time to system requirements.
What output configuration does the NCP302LSN47T1 provide?
The NCP302LSN47T1 provides a complementary output configuration - meaning it integrates both P-channel and N-channel output transistors on Pin 1. In active-low mode (denoted by 'L' suffix), it can actively drive high (Pch source) or low (Nch sink), enabling direct interface to mixed-logic systems without external pull-ups or inverters. This differs from open-drain-only alternatives like the NCP303 series.
What is the operating temperature range for the NCP302LSN47T1?
The NCP302LSN47T1 is specified for operation from −40°C to +125°C ambient temperature. This extended range applies to all voltage options ≥1.2 V, including the 4.7 V variant. It meets AEC-Q100 stress test requirements when ordered as NCV302LSN47T1, making it suitable for under-hood automotive modules, industrial controllers, and outdoor edge devices.
How much quiescent current does the NCP302LSN47T1 consume?
The NCP302LSN47T1 consumes only 0.34 µA typical supply current (Iin) at Vin = 4.54 V and 25°C, rising to 0.53 µA maximum at high temperature. At lower input voltages (e.g., 0.7 V), current drops to 0.25 µA typical. This ultra-low quiescent current enables multi-year operation from primary lithium or coin-cell batteries in always-on monitoring applications.
NCP302LSN47T1 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:
- 4.7V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- Adjustable/Selectable
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 5-TSOP
NCP302LSN47T1 FAQ
1.How can I place an order for NCP302LSN47T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP302LSN47T1 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 NCP302LSN47T1 reliable?
The price and inventory of NCP302LSN47T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP302LSN47T1 is usually 5 days.
3.What payment methods are accepted for NCP302LSN47T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP302LSN47T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP302LSN47T1?
NCP302LSN47T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP302LSN47T1 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 NCP302LSN47T1?
For technical support, including NCP302LSN47T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP302LSN47T1 requirements.
6.How does Aetrix verify that NCP302LSN47T1 is sourced from the original manufacturer or authorized distributors?
All NCP302LSN47T1 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 NCP302LSN47T1 meets industry standards.
7.What is the process for return or replacement of NCP302LSN47T1?
All NCP302LSN47T1 units undergo pre-shipment inspection (PSI). If there is an issue with NCP302LSN47T1, 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 NCP302LSN47T1 part is unused and in its original packaging.
Return procedure for NCP302LSN47T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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