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

Diodes Incorporated APX803L20-16SA-7

Name: APX803L20-16SA-7
Brand: Diodes Incorporated
SKU: APX803L20-16SA-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: APX803L20-16SA-7

Manufacturer:: Diodes Incorporated

Category:: Supervisors

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

Datasheet:: APX803L20-16SA-7.pdf

Description:: IC SUPERVISOR 1 CHANNEL SOT23

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Product details

Overview

APX803L20-16SA-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 low-power digital systems. It features a fixed 1.6V detection threshold (±1.5% accuracy), 220ms reset timeout, open-drain active-low RESET output, and consumes only 1µA typical supply current. It is deployed in portable medical monitors to ensure reliable microcontroller restart upon brownout.

For engineers reviewing the APX803L20-16SA-7 datasheet, APX803L20-16SA-7 pinout, APX803L20-16SA-7 application, or APX803L20-16SA-7 equivalent, key selection criteria include threshold voltage tolerance, reset delay stability over temperature, open-drain sink capability, and SOT23 package compatibility with space-constrained PCB layouts.

Technical Context

The APX803L20-16SA-7 implements a precision bandgap-based voltage reference with internal hysteresis (0.01×V_TH) to prevent oscillation during threshold crossing. Its comparator drives an open-drain output stage capable of sinking ≥3.5mA at V_OL ≤ 0.4V, enabling direct interface with µP reset inputs without external pull-up constraints.

Reset assertion occurs within 20µs of V_CC falling below 1.6V, and release requires V_CC to exceed 1.6V + hysteresis. The 220ms timeout (typ. 220ms, min 143ms, max 297ms) is factory-programmed and stable across –40°C to +85°C operating ambient.

Key Specifications

Parameter	Value and Actual Design Meaning
Detection Threshold	1.6V ±1.5% - ensures accurate brownout detection for 1.8V I/O domain logic without false resets.
Supply Current	1.0µA (typ.), 2.5µA (max) - enables multi-year operation on coin-cell batteries in always-on monitoring nodes.
Reset Timeout	220ms (min 143ms, max 297ms) - provides sufficient hold time for full µP initialization and peripheral stabilization.
Output Type	Open-drain, active-low - allows wired-OR reset bus sharing and flexible pull-up voltage selection (up to 5.5V).
Response Time	≤20µs - guarantees rapid fault capture before system state corruption in real-time control loops.
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.
Temperature Range	–40°C to +85°C - validated for industrial-grade embedded applications including automotive cabin electronics.

Pinout & Package

SOT23-3 package (JEDEC TO-236AB), 1.3mm × 2.9mm footprint, 1.45mm height, gull-wing leads, RoHS-compliant matte tin finish.

Pin/Terminal	Circuit Role	Design Meaning
1 (GND)	Ground Reference	Return path for internal bias and output sink current; must be connected to system ground plane for noise immunity.
2 (RESET)	Open-Drain Reset Output	Active-low signal asserted when V_CC < 1.6V; requires external pull-up to host logic voltage (e.g., 3.3V).
3 (V_CC)	Supply Input	Powers internal circuitry and senses monitored rail; decoupling capacitor (100nF) required within 5mm of pin.

Key Features

Feature	Design Value
Ultra-low quiescent current	1.0µA typical - eliminates measurable impact on battery life in energy-harvesting sensor nodes.
Factory-set 220ms delay	No external RC components needed - reduces BOM count and layout area versus adjustable reset ICs.
High threshold accuracy	±1.5% over temperature - avoids marginal reset behavior near logic V_IH/V_IL thresholds.
Fast response timing	20µs detection-to-assertion - meets tight timing budgets in motor control safety monitors.
Robust ESD protection	±4000V HBM - withstands handling and board assembly without additional protection circuitry.

Applications

Portable Medical Monitors

Industrial PLC I/O Modules

Use Scenario: Continuous ECG data acquisition powered by lithium-thionyl chloride battery with no charging circuit.

IC Role / Device Role / Timing Role: Supervises 3.3V system rail; asserts RESET if voltage sags below 1.6V due to pulse load or end-of-life battery drop.

Use Value: Prevents corrupted waveform storage and false alarm generation by ensuring µC only operates within validated supply margin.

Use Scenario: DIN-rail mounted remote I/O unit exposed to wide ambient swings (–25°C to +70°C) and conducted transients.

IC Role / Device Role / Timing Role: Monitors 5V backplane supply; holds µC in reset until rail stabilizes post-power-up or after transient recovery.

Use Value: Eliminates boot failures caused by slow-rising or noisy 5V rails, improving field reliability without firmware intervention.

Smart Meter Communication Modules

Wearable Fitness Trackers

Use Scenario: NB-IoT cellular modem co-located with metrology ASIC on single 3.3V LDO output.

IC Role / Device Role / Timing Role: Detects 3.3V droop during RF transmit bursts; triggers 220ms reset window to guarantee clean modem reinitialization.

Use Value: Avoids stuck modem states and packet loss by enforcing deterministic recovery timing aligned with LTE/NB-IoT stack requirements.

Use Scenario: Optical heart-rate sensor subsystem powered by 1.8V buck converter with light-load efficiency optimization.

IC Role / Device Role / Timing Role: Supervises 1.8V rail feeding sensor analog front-end and BLE SoC; asserts reset on sub-1.6V dips during motion-induced supply sag.

Use Value: Maintains sensor calibration integrity and BLE connection stability by preventing analog/digital domain mismatch during undervoltage events.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TPS3808G16DBVR	1.6V threshold, 200ms fixed delay, 1.6µA supply current, same SOT23-3 package	Higher ICC increases battery drain; tighter ±0.5% threshold accuracy but no hysteresis spec provided	Prefer for ultra-precision threshold needs where 1µA vs. 1.6µA is not critical to battery lifetime.
MAX809SEUR+T	1.6V threshold, 140ms min delay, 10µA supply current, SOT23-3	10× higher ICC limits use in multi-year battery apps; wider delay variation (140–300ms) affects timing predictability	Acceptable for mains-powered industrial controllers where power efficiency is secondary to legacy design continuity.

Compared with TPS3808G16DBVR and MAX809SEUR+T, the APX803L20-16SA-7 delivers the lowest supply current (1µA) and tightest production delay consistency (143–297ms), making it optimal for long-life battery systems requiring predictable, low-overhead reset supervision.

Availability

APX803L20-16SA-7 is available at Aetrix Electronics and suitable for portable medical monitors, industrial PLC I/O modules, and smart meter communication modules requiring stable component supply across multi-year production cycles.

Supply support for APX803L20-16SA-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 emphasis on high-reliability, low-power, and automotive-qualified components.

The APX803L series targets cost-sensitive, space-constrained embedded systems requiring dependable power-on reset and brownout detection without external components or complex configuration.

FAQ

What is the exact reset timeout value for APX803L20-16SA-7 across temperature?

The APX803L20-16SA-7 has a nominal reset timeout of 220ms at +25°C, with guaranteed minimum of 143ms and maximum of 297ms over the full –40°C to +85°C operating range. This is factory-trimmed and does not require external timing components.

Can APX803L20-16SA-7 monitor a 1.2V supply rail?

No. The APX803L20-16SA-7 is configured for 1.6V detection and cannot reliably supervise 1.2V rails. For 1.2V monitoring, Diodes offers APX803L12-XXSA-7 (1.2V threshold variant) in identical SOT23-3 packaging.

Does the RESET pin require an external pull-up resistor?

Yes. The RESET pin is open-drain and must be pulled up to the target logic voltage (e.g., 3.3V or 5V) via an external resistor (typically 10kΩ–100kΩ). No internal pull-up is present, and operation is undefined without this connection.

Is APX803L20-16SA-7 qualified for automotive applications?

The APX803L20-16SA-7 is not AEC-Q100 qualified. Diodes offers automotive-grade variants (e.g., APX803L20-16SA-7Q) with PPAP support, IATF 16949 manufacturing, and extended temperature screening - contact Diodes sales for qualification documentation.

APX803L20-16SA-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:: 1.6V

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

APX803L20-16SA-7 FAQ

1.How can I place an order for APX803L20-16SA-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for APX803L20-16SA-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 APX803L20-16SA-7 reliable?

The price and inventory of APX803L20-16SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803L20-16SA-7 is usually 5 days.

3.What payment methods are accepted for APX803L20-16SA-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L20-16SA-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for APX803L20-16SA-7?

APX803L20-16SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your APX803L20-16SA-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 APX803L20-16SA-7?

For technical support, including APX803L20-16SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L20-16SA-7 requirements.

6.How does Aetrix verify that APX803L20-16SA-7 is sourced from the original manufacturer or authorized distributors?

All APX803L20-16SA-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 APX803L20-16SA-7 meets industry standards.

7.What is the process for return or replacement of APX803L20-16SA-7?

All APX803L20-16SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L20-16SA-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 APX803L20-16SA-7 part is unused and in its original packaging.

Return procedure for APX803L20-16SA-7:

1.Submit a request within 90 days.

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

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