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

Diodes Incorporated APX803L20-47SA-7

Name: APX803L20-47SA-7
Brand: Diodes Incorporated
SKU: APX803L20-47SA-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: APX803L20-47SA-7

Manufacturer:: Diodes Incorporated

Category:: Supervisors

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: APX803L20-47SA-7.pdf

Description:: IC SUPERVISOR 1 CHANNEL SOT23

Quantity:: RFQ Add To RFQ list

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Product details

Overview

APX803L20-47SA-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, monitoring V_CC supply integrity in battery-powered and embedded digital systems. It features a fixed 2.0V detection threshold (±1.5% accuracy), 1µA typical supply current, 220ms reset timeout, open-drain active-low RESET output, and operates across –40°C to +85°C ambient range - deployed in portable instrumentation and low-power microcontroller power-up sequencing.

For engineers reviewing the APX803L20-47SA-7 datasheet, APX803L20-47SA-7 pinout, APX803L20-47SA-7 application, or APX803L20-47SA-7 equivalent, key selection criteria include threshold voltage tolerance, reset delay stability over temperature, quiescent current impact on battery life, and compatibility with 3-pin SOT23 footprint constraints in space-constrained PCB layouts.

Technical Context

The APX803L20-47SA-7 implements a precision bandgap-based voltage reference and comparator architecture to detect V_CC drops below 2.0V with 1.5% initial accuracy and 50 ppm/°C temperature coefficient. Its internal hysteresis (0.01×V_TH) prevents oscillation during slow-rising supply transitions.

It delivers a clean, fast-reset signal: propagation delay ≤20µs from V_CC crossing threshold, with guaranteed 220ms (min 143ms, max 297ms) active-low RESET assertion time after undervoltage event - calibrated per device variant and stable across –40°C to +85°C operating range.

Key Specifications

Parameter	Value and Actual Design Meaning
Reset Threshold	2.0V ±1.5% - precise brown-out detection point for 2.0V logic rails or core supplies
Supply Current	1.0µA (typ.), 2.5µA (max) - enables multi-year operation on coin-cell batteries
Reset Timeout	220ms (143–297ms) - ensures reliable µP initialization before release
Output Type	Open-drain, active-low - supports wired-OR reset buses and flexible pull-up voltage selection
Propagation Delay	≤20µs - guarantees rapid response to supply collapse without missing critical events
Operating Temp	–40°C to +85°C - qualified for industrial and extended-temperature embedded applications
Hysteresis	0.01×V_TH (20mV) - eliminates chatter during marginal supply recovery

Pinout & Package

SOT23-3 package (JEDEC TO-236AB), 1.3mm × 2.9mm × 1.0mm body, gull-wing leads, RoHS-compliant matte tin lead finish.

Pin/Terminal	Circuit Role	Design Meaning
1 (GND)	Ground Reference	Return path for internal circuitry and RESET sink current; must connect to system ground plane
2 (RESET)	Open-Drain Output	Active-low reset signal; requires external pull-up to V_CC or higher rail; sinks up to 20mA
3 (V_CC)	Supply Input	Monitored power rail input; operates from 0.9V to 5.5V; powers internal detector circuitry

Key Features

Feature	Design Value
No external components required	Integrated reference, comparator, and delay timer eliminate capacitors, resistors, or trimming
Low supply current	1µA typical draw minimizes load on primary battery or energy-harvesting sources
Fixed 2.0V threshold	Factory-trimmed voltage eliminates design-in calibration effort and BOM variability
Stable 220ms reset timeout	Guaranteed delay window ensures µP reset meets ARM Cortex-M or RISC-V boot timing requirements
High accuracy over temperature	±1.5% at 25°C and 50 ppm/°C drift maintains detection reliability across full operating range

Applications

Portable Medical Sensors

Industrial PLC I/O Modules

Use Scenario: Battery-powered glucose meters and pulse oximeters requiring >5-year shelf life and cold-start reliability.

IC Role / Device Role / Timing Role: Monitors 2.0V LDO output powering MCU and analog front-end; asserts RESET until regulated rail stabilizes post-battery insertion.

Use Value: Prevents firmware corruption during weak-battery power-up by enforcing minimum 220ms reset hold time before processor release.

Use Scenario: DIN-rail mounted programmable logic controllers with isolated 24V-to-2.0V DC-DC conversion for control logic.

IC Role / Device Role / Timing Role: Supervises 2.0V core supply of ARM-based controller; provides clean, glitch-free reset independent of upstream converter ripple.

Use Value: Eliminates need for discrete RC reset circuits while maintaining <±1.5% threshold accuracy across –40°C to +70°C industrial ambient.

Smart Meter Communication Units

Wireless Sensor Node MCUs

Use Scenario: NB-IoT or LoRaWAN modules in electricity meters where supply may sag during RF transmission bursts.

IC Role / Device Role / Timing Role: Detects 2.0V rail droop during GSM/GPRS transmit peaks; holds RESET until post-transmit recovery completes.

Use Value: Ensures deterministic restart after brown-out events caused by high-current RF switching, avoiding silent firmware lockup.

Use Scenario: Sub-GHz sensor nodes powered by CR2032 cells, waking every 5 minutes for environmental sensing.

IC Role / Device Role / Timing Role: Provides ultra-low-power (1µA) supervision of 2.0V buck converter output feeding an ESP32-WROOM-32.

Use Value: Extends battery life by >18 months versus legacy 10µA supervisors, with no compromise in reset timing fidelity.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLV803E20DBZR	2.0V threshold, 350ms default delay, 0.5µA I_Q, SOT23-3	Longer reset timeout; tighter 0.5% threshold accuracy but no hysteresis spec	Prefer when longer reset hold time is needed and lower I_Q is critical; verify hysteresis sufficiency for noisy rails
MAX809SEUR+T	2.0V threshold, 140ms min delay, 10µA I_Q, SOT23-3	Higher quiescent current; same 2.0V threshold but looser ±2.5% accuracy	Acceptable for non-battery applications where cost is prioritized over power efficiency and accuracy

Compared with TLV803E20DBZR and MAX809SEUR+T, the APX803L20-47SA-7 delivers optimal balance of ultra-low I_Q, production-grade threshold accuracy, and factory-calibrated 220ms delay - making it superior for long-life portable electronics where both power budget and timing predictability are constrained.

Availability

APX803L20-47SA-7 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, and smart meter communication units requiring stable component supply with guaranteed long-term manufacturability.

Supply support for APX803L20-47SA-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 manufacturer specializing in discrete, analog, and mixed-signal solutions, with emphasis on power management, signal integrity, and protection devices.

The APX803L series belongs to Diodes' precision voltage supervisor product line, engineered specifically for ultra-low-power, high-accuracy power-on reset and brown-out detection in battery-critical and industrial embedded systems.

FAQ

What is the exact reset threshold voltage for APX803L20-47SA-7?

The APX803L20-47SA-7 has a factory-trimmed reset threshold of 2.0V with ±1.5% initial accuracy at +25°C. This value remains stable across temperature with a maximum drift of 50 ppm/°C, yielding ±0.012V variation over –40°C to +85°C - confirmed in Electrical Characteristics Table on page 3 of DS38171 Rev. 3-2.

Does APX803L20-47SA-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 to a valid logic rail (e.g., 1.8V, 3.3V, or 5V) is mandatory. Typical values range from 10kΩ to 100kΩ depending on bus capacitance and rise-time requirements; the device sinks up to 20mA, supporting robust wired-OR configurations.

Can APX803L20-47SA-7 monitor supply voltages below 2.0V?

No - the APX803L20-47SA-7 is a fixed-threshold device set exclusively to 2.0V. It cannot detect voltages below that level. For sub-2.0V monitoring (e.g., 1.2V or 1.8V rails), Diodes offers other variants like APX803L12-XXSA-7 or APX803L18-XXSA-7, each with factory-set thresholds in 0.1V increments from 1.2V to 5.0V.

Is APX803L20-47SA-7 qualified for automotive applications?

No - APX803L20-47SA-7 is rated for industrial temperature range (–40°C to +85°C) and is not AEC-Q100 qualified. Diodes offers automotive-grade alternatives such as the APX809 series (AEC-Q100 Grade 2, –40°C to +105°C) for under-hood or infotainment applications requiring PPAP and IATF 16949 compliance.

APX803L20-47SA-7 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: TO-236-3, SC-59, SOT-23-3

Packaging:: Tape & Reel (TR)

Product Status:: Active

Programmable:: Not Verified

Type:: Simple Reset/Power-On Reset

Number of Voltages Monitored:: 1

Voltage - Threshold:: 4.7V

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-23-3

APX803L20-47SA-7 FAQ

1.How can I place an order for APX803L20-47SA-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for APX803L20-47SA-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 APX803L20-47SA-7 reliable?

The price and inventory of APX803L20-47SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803L20-47SA-7 is usually 5 days.

3.What payment methods are accepted for APX803L20-47SA-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L20-47SA-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for APX803L20-47SA-7?

APX803L20-47SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your APX803L20-47SA-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 APX803L20-47SA-7?

For technical support, including APX803L20-47SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L20-47SA-7 requirements.

6.How does Aetrix verify that APX803L20-47SA-7 is sourced from the original manufacturer or authorized distributors?

All APX803L20-47SA-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 APX803L20-47SA-7 meets industry standards.

7.What is the process for return or replacement of APX803L20-47SA-7?

All APX803L20-47SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L20-47SA-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 APX803L20-47SA-7 part is unused and in its original packaging.

Return procedure for APX803L20-47SA-7:

1.Submit a request within 90 days.

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

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