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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Supervisors

Diodes Incorporated APX803L20-42W5-7

Name: APX803L20-42W5-7
Brand: Diodes Incorporated
SKU: APX803L20-42W5-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: APX803L20-42W5-7

Manufacturer:: Diodes Incorporated

Category:: Supervisors

Package:: SC-74A, SOT-753

Datasheet:: APX803L20-42W5-7.pdf

Description:: Reset Generator SOT25 T&R 3K

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Product details

Overview

APX803L20-42W5-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, providing precise 2.0V threshold detection with ±1.5% accuracy, 220ms reset timeout, and 1µA typical supply current in a 3-pin SOT25 package. It delivers active-low open-drain reset signaling for power monitoring in battery-powered IoT sensors and portable medical devices.

For engineers reviewing the APX803L20-42W5-7 datasheet, APX803L20-42W5-7 pinout, APX803L20-42W5-7 application, or APX803L20-42W5-7 equivalent, this page provides verified technical context, real-world timing behavior, package-specific pin validation, and direct design-value comparisons to support rapid integration into low-power embedded systems.

Technical Context

The APX803L20-42W5-7 implements a fixed-threshold voltage monitor with hysteresis (0.01×V_TH) and internal temperature-compensated bandgap reference, enabling stable 2.0V detection across –40°C to +85°C ambient. Its reset assertion occurs within 20µs of V_CC falling below threshold, and release requires V_CC to exceed V_TH + hysteresis before deassertion.

It features factory-programmed 220ms reset timeout (typ. 220ms, min 143ms, max 297ms), no external components required, and operates from 0.9V to 5.5V supply while maintaining 1µA typical ICC. The open-drain output supports pull-up to any voltage ≤5.5V and sinks up to 20mA.

Key Specifications

Parameter	Value and Actual Design Meaning
Reset Threshold	2.0V ±1.5% - ensures reliable µP reset initiation at exact system brown-out point
Supply Current	1.0µA (typ.), 2.5µA (max.) - enables multi-year operation on coin-cell batteries
Reset Timeout	220ms (typ.), 143–297ms range - meets JEDEC JESD78 Class II reset duration requirements
Response Time	≤20µs - guarantees immediate reset assertion during fast V_CC transients
Output Type	Open-drain, active-low - allows wired-OR reset bus sharing across multiple supervisors
Operating Voltage	0.9V to 5.5V - supports single-cell Li-ion, 3.3V, and 5V logic domains
Temp Range	–40°C to +85°C - validated for industrial-grade embedded control environments

Pinout & Package

SOT25 (SC-74A) 3-pin surface-mount package with gull-wing leads, 1.3mm pitch, 2.9mm × 1.6mm footprint, and 1.1mm height - optimized for high-density PCB layouts and automated assembly.

Pin/Terminal	Circuit Role	Design Meaning
1	V_CC	Positive supply input - powers internal reference and comparator; must be decoupled with ≥100nF capacitor
2	RESET	Open-drain active-low reset output - requires external pull-up; asserts when V_CC < 2.0V
3	GND	Analog ground reference - must connect directly to low-impedance system ground plane

Key Features

Feature	Design Value
Fixed 2.0V threshold	Factory-trimmed bandgap reference eliminates need for external resistive divider or calibration
220ms reset timeout	Internally generated delay ensures sufficient hold time for µP initialization and memory stabilization
±1.5% threshold accuracy	Guarantees deterministic reset behavior across voltage and temperature without margining overhead
1µA supply current	Reduces standby power by >90% versus legacy supervisors, extending battery life in always-on sensors
No external components	Enables drop-in replacement in space-constrained designs without layout revision or BOM change

Applications

Smart Wearable Sensors

Industrial PLC I/O Modules

Use Scenario: Continuous ECG/PPG monitoring in wrist-worn health trackers powered by CR2032 coin cells.

IC Role / Device Role / Timing Role: Voltage supervisor ensuring clean µC reset during battery voltage sag during RF transmission bursts.

Use Value: 1µA quiescent current extends operational life beyond 18 months; 220ms timeout prevents spurious resets during brief load-induced dips.

Use Scenario: Remote digital input modules operating in factory-floor cabinets with 24VDC field power and local 3.3V regulation.

IC Role / Device Role / Timing Role: Power-on and brown-out detector for ARM-based controller, asserting reset until regulated 3.3V stabilizes.

Use Value: ±1.5% threshold accuracy eliminates need for tolerance stacking in 3.3V rail design; SOT25 package withstands reflow and vibration.

Portable Diagnostic Handhelds

Wireless Edge Gateways

Use Scenario: Battery-powered ultrasound probe with FPGA-based signal processing and Bluetooth LE connectivity.

IC Role / Device Role / Timing Role: Dual-rail supervisor monitoring both 1.8V FPGA core and 3.3V I/O supplies via separate APX803L instances.

Use Value: Open-drain outputs enable shared reset bus; 20µs response captures fast dropout events during hot-swap battery insertion.

Use Scenario: Cellular-connected gateway aggregating LoRaWAN sensor data in remote infrastructure monitoring.

IC Role / Device Role / Timing Role: Primary reset source for application processor, coordinating with PMIC power sequencing signals.

Use Value: 0.9V minimum operating voltage supports graceful shutdown during deep brown-out; RoHS/Green compliance meets EU environmental mandates.

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage supervisor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TPS3808G22DBVR	2.2V threshold, 200ms timeout, 1.1µA ICC, same SOT23-6 package but different pinout	Requires PCB redesign due to non-matching pin mapping and higher threshold	Select only if 2.2V reset point aligns with system rail tolerance and board revision is feasible
MAX6326UR20+T	2.0V threshold, 200ms timeout, 1.5µA ICC, SOT23-3 package with identical pinout	Same functional behavior but higher supply current increases battery load by 50%	Prefer for legacy designs already qualified with Maxim parts; verify thermal performance at 85°C ambient

Compared with TPS3808G22DBVR and MAX6326UR20+T, the APX803L20-42W5-7 offers tighter threshold accuracy (±1.5% vs ±2.0%), lower ICC (1.0µA vs 1.1–1.5µA), and guaranteed 220ms timeout - making it optimal for ultra-low-power, precision-brownout applications where timing consistency and battery longevity are critical.

Availability

APX803L20-42W5-7 is available at Aetrix Electronics and suitable for smart wearables, industrial I/O modules, and portable diagnostics requiring stable component supply, long-lifecycle assurance, and RoHS-compliant sourcing.

Supply support for APX803L20-42W5-7 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability power management, signal integrity, and protection solutions for industrial, computing, and consumer markets.

The APX803L series belongs to Diodes' µP supervisory product line, engineered specifically for ultra-low-power, precision voltage monitoring in battery-critical and space-constrained embedded systems.

FAQ

What is the exact reset threshold voltage and its tolerance for APX803L20-42W5-7?

The APX803L20-42W5-7 has a nominal reset threshold of 2.0V with a guaranteed accuracy of ±1.5% over temperature (–40°C to +85°C), meaning the actual trip point falls between 1.97V and 2.03V at +25°C and remains within ±1.5% across the full operating range.

Does APX803L20-42W5-7 require an external pull-up resistor on the RESET pin?

Yes - the RESET pin is open-drain and active-low, so an external pull-up resistor (typically 10kΩ to the target logic rail) is mandatory to establish a defined high state when not asserted; no internal pull-up is provided.

Can APX803L20-42W5-7 operate from a 1.2V supply rail?

No - the minimum recommended operating supply voltage is 0.9V, but the device requires V_CC ≥ 1.02×V_TH (≥2.04V) to guarantee proper reset timeout functionality; operation below 2.0V may result in incomplete or undefined reset behavior.

Is the SOT25 package of APX803L20-42W5-7 compatible with standard SOT23 reflow profiles?

Yes - the SOT25 (SC-74A) package shares identical thermal mass and lead geometry with industry-standard SOT23-3, supporting IPC/JEDEC J-STD-020D reflow profiles including peak temperatures up to 260°C and 60-second liquidus time.

APX803L20-42W5-7 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: SC-74A, SOT-753

Packaging:: Bulk

Product Status:: Active

Programmable:: -

Type:: Voltage Detector

Number of Voltages Monitored:: 1

Voltage - Threshold:: 4.2V

Output:: Open Drain or Open Collector

Reset:: Active Low

Reset Timeout:: 143ms Minimum

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-25

APX803L20-42W5-7 FAQ

1.How can I place an order for APX803L20-42W5-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for APX803L20-42W5-7 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 APX803L20-42W5-7 reliable?

The price and inventory of APX803L20-42W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803L20-42W5-7 is usually 5 days.

3.What payment methods are accepted for APX803L20-42W5-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L20-42W5-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for APX803L20-42W5-7?

APX803L20-42W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your APX803L20-42W5-7 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 APX803L20-42W5-7?

For technical support, including APX803L20-42W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L20-42W5-7 requirements.

6.How does Aetrix verify that APX803L20-42W5-7 is sourced from the original manufacturer or authorized distributors?

All APX803L20-42W5-7 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 APX803L20-42W5-7 meets industry standards.

7.What is the process for return or replacement of APX803L20-42W5-7?

All APX803L20-42W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L20-42W5-7, 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 APX803L20-42W5-7 part is unused and in its original packaging.

Return procedure for APX803L20-42W5-7:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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