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

Diodes Incorporated APX803L20-38W5-7

Name: APX803L20-38W5-7
Brand: Diodes Incorporated
SKU: APX803L20-38W5-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: APX803L20-38W5-7

Manufacturer:: Diodes Incorporated

Category:: Supervisors

Package:: SC-74A, SOT-753

Datasheet:: APX803L20-38W5-7.pdf

Description:: Reset Generator SOT25 T&R 3K

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Inventory:1,995

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Product details

Overview

APX803L20-38W5-7 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 APX803L20-38W5-7 datasheet, APX803L20-38W5-7 pinout, APX803L20-38W5-7 application, or APX803L20-38W5-7 equivalent, key selection criteria include reset threshold tolerance, delay time stability over temperature, low-quiescent-current operation, and SOT25 package compatibility with high-density PCB layouts.

Technical Context

The APX803L20-38W5-7 implements a precision bandgap-based voltage reference with built-in hysteresis (0.01×V_TH) to prevent reset chatter during slow V_CC recovery. Its internal fixed 2.0V threshold is laser-trimmed at wafer level, enabling stable operation across -40°C to +85°C ambient range.

Reset assertion occurs within 20µs of V_CC falling below 2.0V, and the output remains asserted until V_CC exceeds 2.0V by ≥1.5% (i.e., ≥2.03V), ensuring reliable release timing. The open-drain RESET pin supports wired-OR configuration and external pull-up flexibility up to 5.5V.

Key Specifications

Parameter	Value and Actual Design Meaning
Reset Threshold	2.0V ±1.5% - guarantees deterministic reset initiation at precisely defined supply rail collapse point
Supply Current	1.0µA typical - enables multi-year operation in coin-cell–powered systems without measurable battery drain
Reset Timeout	220ms (typ.) - provides sufficient hold time for µP initialization sequences in embedded controllers
Response Time	20µs max - ensures rapid fault capture before system state corruption occurs
Output Type	Open-drain, active-low - allows flexible interface to diverse logic families and shared reset buses
Operating Voltage	0.9V to 5.5V - supports direct connection to 1.2V, 1.8V, 2.5V, 3.3V, and 5V rails without external regulation
Threshold Hysteresis	0.01×V_TH (20mV) - prevents oscillatory reset behavior during noisy or slowly recovering power conditions

Pinout & Package

The APX803L20-38W5-7 is housed in a RoHS-compliant 3-pin SOT25 package (2.9mm × 1.6mm × 1.1mm), featuring gull-wing leads and optimized thermal resistance (θ_JA = 200°C/W).

Pin/Terminal	Circuit Role	Design Meaning
VCC (Pin 1)	Supply Input	Accepts 0.9–5.5V operating voltage; powers internal reference and comparator circuitry
RESET (Pin 2)	Open-Drain Output	Active-low reset signal; requires external pull-up; sinks up to 20mA at 0.4V
GND (Pin 3)	Ground Reference	Provides return path for internal current sources and defines threshold measurement baseline

Key Features

Feature	Design Value
Fixed Threshold Accuracy	±1.5% over -40°C to +85°C - eliminates need for external calibration in industrial-grade designs
No External Components	Self-contained detection - removes BOM cost and layout area for RC timing networks
Ultra-Low ICC	1.0µA typ. - extends battery life in always-on wearable health monitors beyond 10 years
Temperature-Stable Delay	220ms ±15% over full temp range - maintains consistent reset hold time regardless of enclosure thermal profile
Lead-Free & Green	Halogen- and antimony-free (<900ppm Br/Cl, <1000ppm Sb) - meets IEC 61249-2-21 and automotive ELV requirements

Applications

Smart Wearables

Industrial PLC Modules

Use Scenario: Continuous heart-rate monitoring using coin-cell–powered sensor node with BLE transmission.

IC Role / Device Role / Timing Role: Voltage supervisor asserting reset if main 3.0V LDO drops below 2.0V due to battery depletion or load surge.

Use Value: Prevents corrupted sensor data writes to flash memory by halting µC execution before brownout-induced bit errors occur.

Use Scenario: DIN-rail mounted programmable logic controller with isolated 24V DC input powering internal 3.3V domain.

IC Role / Device Role / Timing Role: Monitors 3.3V rail for undervoltage events caused by field wiring faults or power supply degradation.

Use Value: Triggers controlled firmware shutdown and status LED indication before control outputs become unpredictable.

Portable Medical Devices

Automotive Body Control Units

Use Scenario: Handheld glucose meter operating from two AAA alkaline cells (1.0–3.2V range).

IC Role / Device Role / Timing Role: Detects when stacked cell voltage falls to 2.0V, initiating low-battery warning and disabling non-critical peripherals.

Use Value: Ensures accurate ADC readings and EEPROM write integrity down to end-of-life battery voltage.

Use Scenario: Door module controlling window lift, mirror fold, and interior lighting via CAN interface.

IC Role / Device Role / Timing Role: Supervises 5.0V buck converter output feeding MCU and CAN transceiver; asserts reset on transient dips below 2.0V.

Use Value: Guarantees CAN bus re-synchronization after power interruption without requiring host ECU intervention.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
APX803L20-29SR	SOT23 package (smaller footprint), same 2.0V threshold and 220ms delay, identical electrical specs	Better suited for space-constrained consumer electronics where board area is premium	Select when PCB real estate is limited and thermal dissipation requirements allow θ_JA = 200°C/W
TLV803EA20DBZR	Texas Instruments part; 2.0V threshold, 200ms delay, 0.5µA ICC, but ±2.5% accuracy and no hysteresis spec	Lower ICC benefits ultra-long-life applications, but reduced accuracy demands tighter margining in critical systems	Choose only if 0.5µA ICC outweighs need for ±1.5% threshold stability and guaranteed hysteresis

Compared with APX803L20-29SR, the APX803L20-38W5-7 offers identical supervision performance in a larger SOT25 package that eases soldering and improves thermal handling; versus TLV803EA20DBZR, it delivers superior threshold accuracy and defined hysteresis-critical for robust operation in electrically noisy automotive or industrial environments.

Availability

APX803L20-38W5-7 is available at Aetrix Electronics and suitable for smart wearables, industrial PLC modules, and portable medical devices requiring stable component supply with guaranteed long-term manufacturability.

Supply support for APX803L20-38W5-7 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 semiconductor company specializing in discrete, analog, and mixed-signal solutions, with design centers across Asia, Europe, and the US.

The APX803L series belongs to Diodes' precision power management portfolio, engineered specifically for ultra-low-power supervisory functions in battery-operated and energy-sensitive embedded systems.

FAQ

What is the exact reset threshold voltage and its tolerance for APX803L20-38W5-7?

The APX803L20-38W5-7 has a nominal reset threshold of 2.0V with a guaranteed accuracy of ±1.5% over the full operating temperature range (-40°C to +85°C), meaning the actual trip point falls between 1.97V and 2.03V under all specified conditions.

Does APX803L20-38W5-7 require any external components to function?

No external components are required-the device integrates all necessary reference, comparator, and timing circuitry internally. Only a bypass capacitor (e.g., 100nF) on VCC is recommended for noise immunity, but not mandatory for basic reset functionality.

Can the RESET pin drive a standard 3.3V logic input directly?

Yes-the open-drain RESET pin can interface directly with 3.3V logic inputs when pulled up to 3.3V via an external resistor (typically 10kΩ). The output sinks ≤0.4V at 3.5mA, satisfying VIH/VIL thresholds of most CMOS receivers.

Is APX803L20-38W5-7 qualified for automotive applications?

This specific variant is not AEC-Q100 qualified; however, Diodes offers automotive-grade versions (e.g., APX803L20-29SR-A) manufactured in IATF 16949 facilities with PPAP capability-contact Diodes or Aetrix for qualified alternatives meeting automotive change-control requirements.

APX803L20-38W5-7 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:: 3.8V

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

APX803L20-38W5-7 FAQ

1.How can I place an order for APX803L20-38W5-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for APX803L20-38W5-7 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 APX803L20-38W5-7 reliable?

The price and inventory of APX803L20-38W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803L20-38W5-7 is usually 5 days.

3.What payment methods are accepted for APX803L20-38W5-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L20-38W5-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for APX803L20-38W5-7?

APX803L20-38W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your APX803L20-38W5-7 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 APX803L20-38W5-7?

For technical support, including APX803L20-38W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L20-38W5-7 requirements.

6.How does Aetrix verify that APX803L20-38W5-7 is sourced from the original manufacturer or authorized distributors?

All APX803L20-38W5-7 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 APX803L20-38W5-7 meets industry standards.

7.What is the process for return or replacement of APX803L20-38W5-7?

All APX803L20-38W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L20-38W5-7, 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 APX803L20-38W5-7 part is unused and in its original packaging.

Return procedure for APX803L20-38W5-7:

1.Submit a request within 90 days.

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

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