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

Diodes Incorporated APX803L-50SA-7

Name: APX803L-50SA-7
Brand: Diodes Incorporated
SKU: APX803L-50SA-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: APX803L-50SA-7

Manufacturer:: Diodes Incorporated

Category:: Supervisors

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

Datasheet:: APX803L-50SA-7.pdf

Description:: IC SUPERVISOR 1 CHANNEL SOT23

Quantity:: RFQ Add To RFQ list

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Product details

Overview

APX803L-50SA-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 5.0V detection threshold (±1.5% accuracy), 1µA typical supply current, open-drain active-low RESET output, and 0ms reset timeout - enabling immediate fault response in portable electronics and embedded controllers.

For engineers reviewing the APX803L-50SA-7 datasheet, APX803L-50SA-7 pinout, APX803L-50SA-7 application, or APX803L-50SA-7 equivalent, this device serves as a precision, ultra-low-quiescent-power reset supervisor where fast release timing, high threshold stability over temperature, and minimal board footprint are critical selection criteria.

Technical Context

The APX803L-50SA-7 implements a comparator-based detection architecture with built-in hysteresis (0.01×V_TH) to prevent oscillation during supply ramp-up/down. Its internal reference ensures stable 5.0V threshold operation across -40°C to +85°C ambient range, with temperature coefficient of 50 ppm/°C.

As a single-supply, three-terminal device, it requires no external components and delivers sub-20µs reset assertion delay upon V_CC drop below threshold. The 0ms timeout variant provides instantaneous reset deassertion once V_CC exceeds 5.0V × 1.02, supporting tight power sequencing in microcontroller boot sequences.

Key Specifications

Parameter	Value and Actual Design Meaning
Detection Threshold	5.0V ±1.5% - precise brown-out detection for 5V logic rails without calibration
Supply Current	1.0µA (typ.) - negligible load on coin-cell or energy-harvesting supplies
Reset Response Time	<20µs - ensures reliable µP reset before supply collapse destabilizes core logic
Output Type	Open-drain, active-low - enables wired-OR reset bus and flexible pull-up voltage selection
Operating Voltage Range	0.9V to 5.5V - supports operation down to near-threshold V_CC, enabling early fault detection
Threshold Hysteresis	0.01×V_TH (50mV) - prevents chatter during slow supply recovery
Temperature Coefficient	50 ppm/°C - maintains <±20mV drift over full -40°C to +85°C range

Pinout & Package

SOT23-3 package (JEDEC TO-236AB), 1.3mm × 2.9mm footprint, 1.45mm height; RoHS-compliant, halogen-free, lead-free construction.

Pin/Terminal	Circuit Role	Design Meaning
1 (GND)	Ground Reference	Return path for internal bias and output sink current; must be low-impedance connection to system ground plane
2 (RESET)	Open-Drain Reset Output	Active-low signal asserted when V_CC < 5.0V; requires external pull-up to host logic voltage (e.g., 3.3V or 5V)
3 (V_CC)	Supply Input	Monitored power rail input; powers internal circuitry and defines detection reference point

Key Features

Feature	Design Value
Ultra-low quiescent current	1.0µA typ. - extends battery life in always-on monitoring applications beyond 10 years
Fixed 5.0V threshold	Factory-trimmed, no external resistor network required - reduces BOM count and layout area
High accuracy & stability	±1.5% initial tolerance + 50 ppm/°C drift - eliminates need for system-level recalibration
Zero-delay reset timeout	0ms active timeout - enables immediate processor restart upon valid supply restoration
Robust ESD protection	±4000V HBM - withstands handling and board assembly stress without derating

Applications

Smartphone Power Sequencing

Industrial PLC I/O Module

Use Scenario: Monitors main 5V supply rail during cold start and brown-out events in smartphone application processors.

IC Role / Device Role / Timing Role: Voltage supervisor providing active-low reset pulse to SoC's nRESET pin with sub-20µs latency.

Use Value: Prevents corrupted boot firmware execution by ensuring processor remains held in reset until stable 5V is confirmed.

Use Scenario: Supervises 5V auxiliary power feeding isolated digital I/O drivers in programmable logic controller backplanes.

IC Role / Device Role / Timing Role: Fault-detection node asserting system-wide reset if 5V rail drops below operational minimum.

Use Value: Guarantees deterministic fail-safe state transition in safety-critical control loops without software dependency.

Portable Medical Sensor Hub

Automotive Body Control Module (BCM)

Use Scenario: Ensures reliable startup of ultra-low-power sensor fusion MCU powered by lithium coin cell in wearable diagnostics devices.

IC Role / Device Role / Timing Role: Primary reset source triggered by 5.0V LDO output, with zero-delay release for rapid wake-up.

Use Value: Enables consistent first-boot behavior across 10+ year battery life, eliminating intermittent boot failures.

Use Scenario: Monitors 5V domain supplying CAN transceivers and microcontroller peripherals in non-safety-critical BCM subsystems.

IC Role / Device Role / Timing Role: Dedicated voltage monitor interfacing with BCM's watchdog timer and reset controller.

Use Value: Provides hardware-enforced power integrity check independent of firmware, improving field reliability.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLV803E50DBZR	5.0V threshold, 0.8µA I_Q, but only 0ms/200ms timeout options; SOT23-3 pinout identical	Lacks 55ms/450ms variants; tighter V_TH tolerance (±0.5%) but higher cost	Choose for lower I_Q and higher accuracy where timeout flexibility is not required
MAX809SEUR+T	5.0V threshold, 1.2µA I_Q, fixed 240ms timeout; same SOT23-3 footprint	Non-zero timeout limits use in fast-recovery systems; less accurate (±2.5%) and higher tempco (100 ppm/°C)	Choose only if legacy MAX809 compatibility or long timeout is mandatory

Compared with TLV803E50DBZR and MAX809SEUR+T, the APX803L-50SA-7 uniquely balances ultra-low I_Q, high threshold accuracy, and zero-delay reset release - making it optimal for battery-sensitive, fast-boot applications where timing determinism is essential.

Availability

APX803L-50SA-7 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, and automotive body control modules requiring stable component supply and long-term production continuity.

Supply support for APX803L-50SA-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 U.S., serving industrial, computing, consumer, and automotive markets.

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

FAQ

What is the minimum operating voltage for APX803L-50SA-7?

The APX803L-50SA-7 operates down to 0.9V supply voltage, enabling detection functionality even as the monitored 5V rail collapses. This allows early fault recognition before downstream logic becomes unstable, and is verified per Recommended Operating Conditions in DS38171 Rev. 3–2.

Does APX803L-50SA-7 require an external pull-up resistor on the RESET pin?

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. Typical values range from 10kΩ to 100kΩ; the datasheet specifies maximum sink current of 20mA, supporting robust noise immunity in noisy environments.

Can APX803L-50SA-7 be used with a 3.3V microcontroller?

Yes - the open-drain RESET output is voltage-agnostic and compatible with 3.3V logic when pulled up to 3.3V. The device monitors its own V_CC pin (5V rail), not the MCU's I/O voltage, so level translation is unnecessary and system integration is simplified.

Is APX803L-50SA-7 qualified for automotive applications?

No - APX803L-50SA-7 is not AEC-Q100 qualified. Diodes offers automotive-grade alternatives (e.g., APX803L-50SA-7T with extended temp range and PPAP support), but this specific tape-and-reel variant is intended for industrial and consumer applications per its ordering information and qualification status.

APX803L-50SA-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:: 5V

Output:: Open Drain or Open Collector

Reset:: Active Low

Reset Timeout:: -

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3

APX803L-50SA-7 FAQ

1.How can I place an order for APX803L-50SA-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for APX803L-50SA-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 APX803L-50SA-7 reliable?

The price and inventory of APX803L-50SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803L-50SA-7 is usually 5 days.

3.What payment methods are accepted for APX803L-50SA-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L-50SA-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for APX803L-50SA-7?

APX803L-50SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your APX803L-50SA-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 APX803L-50SA-7?

For technical support, including APX803L-50SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L-50SA-7 requirements.

6.How does Aetrix verify that APX803L-50SA-7 is sourced from the original manufacturer or authorized distributors?

All APX803L-50SA-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 APX803L-50SA-7 meets industry standards.

7.What is the process for return or replacement of APX803L-50SA-7?

All APX803L-50SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L-50SA-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 APX803L-50SA-7 part is unused and in its original packaging.

Return procedure for APX803L-50SA-7:

1.Submit a request within 90 days.

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

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