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

Diodes Incorporated APX803L-17SA-7

Name: APX803L-17SA-7
Brand: Diodes Incorporated
SKU: APX803L-17SA-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: APX803L-17SA-7

Manufacturer:: Diodes Incorporated

Category:: Supervisors

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

Datasheet:: APX803L-17SA-7.pdf

Description:: IC SUPERVISOR 1 CHANNEL SOT23

Quantity:: RFQ Add To RFQ list

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Product details

Overview

APX803L-17SA-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, monitoring V_CC supply integrity in embedded digital systems. It features a fixed 1.7V detection threshold (±1.5% accuracy), 1µA typical supply current, open-drain active-low RESET output, and zero-millisecond reset delay - enabling immediate fault response in battery-powered instrumentation and portable electronics.

For engineers reviewing the APX803L-17SA-7 datasheet, APX803L-17SA-7 pinout, APX803L-17SA-7 application, or APX803L-17SA-7 equivalent, this page delivers verified technical context, package-specific pin mapping, real-world use cases, and validated alternative options - all grounded in Diodes Incorporated's DS38171 Rev. 3–2 specification.

Technical Context

The APX803L-17SA-7 implements a precision bandgap-based voltage reference with hysteresis (0.01×V_TH) to prevent oscillation during supply ramp-up/down. Its internal threshold is factory-trimmed to 1.7V with ±1.5% tolerance over –40°C to +85°C ambient.

It operates across 0.9V–5.5V supply range, delivers sub-20µs reset assertion time upon V_CC drop below threshold, and sustains reset state until V_CC exceeds 1.7V by ≥1.5% - ensuring reliable power-on sequencing and brownout recovery in microcontroller-based systems.

Key Specifications

Parameter	Value and Actual Design Meaning
Detection Threshold	1.7V ±1.5% - ensures accurate power-fail detection at nominal 1.8V logic rails without external calibration.
Supply Current	1.0µA (typ.), 2.5µA (max.) - enables multi-year operation on coin-cell batteries in always-on monitoring applications.
Reset Delay	0ms - provides instantaneous reset assertion for critical fail-fast system behavior.
Output Type	Open-drain, active-low - supports wired-OR reset bus architectures and flexible pull-up voltage selection (up to 5.5V).
Response Time	<20µs - guarantees deterministic reset timing for high-speed µP clock domains requiring sub-100µs fault reaction.
Operating Temp	–40°C to +85°C - qualified for industrial-grade embedded control and portable equipment environments.
Package	SOT23-3 - surface-mount footprint compatible with automated assembly and space-constrained PCB layouts.

Pinout & Package

SOT23-3 package: ultra-compact 3-pin surface-mount outline (2.9mm × 1.6mm × 1.1mm), RoHS-compliant, lead-free, halogen-free "Green" construction.

Pin/Terminal	Circuit Role	Design Meaning
1	GND	Ground reference for internal comparator and voltage reference; must be low-impedance connection to system ground plane.
2	RESET	Open-drain active-low reset output; requires external pull-up resistor to define logic-high level and sink capability (≤20mA).
3	V_CC	Power supply input; supplies internal circuitry and monitors itself - no separate sense pin required.

Key Features

Feature	Design Value
Threshold Accuracy	±1.5% over temperature - eliminates need for system-level calibration in cost-sensitive consumer and industrial designs.
No External Components	Self-contained detection circuit - reduces BOM count and PCB area versus discrete resistor-divider + comparator solutions.
Fast Reset Assertion	<20µs propagation delay - meets tight timing budgets for ARM Cortex-M and RISC-V MCU boot sequences.
Low-Temp Drift	50 ppm/°C threshold coefficient - maintains stable trip point across automotive cabin and industrial ambient ranges.
ESD Robustness	±4000V HBM - enhances manufacturing yield and field reliability in handling-intensive assembly environments.

Applications

Portable Medical Sensors

Industrial PLC I/O Modules

Use Scenario: Battery-powered glucose meters and pulse oximeters require guaranteed reset on battery voltage sag below 1.7V to prevent corrupted measurements.

IC Role / Device Role / Timing Role: Voltage supervisor asserting active-low RESET to halt MCU execution and preserve SRAM state until safe restart.

Use Value: 1µA quiescent current extends single-CR2032 battery life beyond 5 years in standby mode.

Use Scenario: DIN-rail mounted PLC modules monitor 3.3V FPGA configuration rails for brownout events during factory floor voltage fluctuations.

IC Role / Device Role / Timing Role: Primary power-good indicator feeding watchdog timer and FPGA configuration controller via shared reset bus.

Use Value: ±1.5% threshold accuracy prevents nuisance resets during nominal 3.3V ±5% supply variation.

Smart Home Hub Controllers

Automotive Body Control Units

Use Scenario: Wi-Fi-enabled home automation hubs use 1.7V detection to guard against USB power adapter instability during firmware updates.

IC Role / Device Role / Timing Role: System-level power supervisor triggering controlled shutdown of RF transceivers and memory before voltage collapse.

Use Value: 0ms delay ensures immediate reset assertion - eliminating risk of flash corruption during power interruption.

Use Scenario: BCMs monitor 1.8V microcontroller core supply derived from buck converter; must detect <1.7V faults within 20µs to meet ISO 16750-2 transient immunity requirements.

IC Role / Device Role / Timing Role: Dedicated rail monitor interfacing directly with MCU's nRST pin and safety diagnostic chain.

Use Value: Sub-20µs response time satisfies ASIL-B timing constraints for non-safety-critical but reliability-sensitive subsystems.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLV803EA17DPWR	1.7V threshold, 0.5µA I_Q, SOT-23-3, but only 100ms min delay option - no 0ms variant available.	Not suitable where immediate reset assertion is required; better for systems needing debounce filtering.	Select TLV803EA17DPWR only if system design tolerates ≥100ms reset hold time after fault clearance.
MAX809SEUR+T	1.63V threshold (not 1.7V), ±2.5% accuracy, 1.2µA I_Q, same SOT-23-3 package and open-drain output.	1.63V trip point may cause premature reset on 1.8V rails near lower spec limit; less precise than APX803L-17SA-7.	Choose MAX809SEUR+T only when 1.63V threshold aligns with system margin analysis and ±2.5% tolerance is acceptable.

Compared with TLV803EA17DPWR and MAX809SEUR+T, the APX803L-17SA-7 uniquely delivers exact 1.7V detection with ±1.5% accuracy and zero-delay reset - making it optimal for 1.8V logic systems demanding minimal trip-point error and deterministic fault response.

Availability

APX803L-17SA-7 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart home hub controllers, and automotive body control units requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for APX803L-17SA-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 devices, with design centers across Asia, Europe, and the US, serving industrial, computing, and consumer markets.

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

FAQ

What is the exact detection threshold voltage of APX803L-17SA-7?

The APX803L-17SA-7 has a factory-trimmed detection threshold of 1.7V with ±1.5% accuracy over –40°C to +85°C ambient temperature, as specified in Diodes Incorporated's DS38171 Rev. 3–2 datasheet Section 5 (Electrical Characteristics). This value is fixed internally and not adjustable.

Does APX803L-17SA-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 the target logic rail (e.g., 3.3V or 1.8V) is mandatory to establish a valid high-level signal. Typical values range from 10kΩ to 100kΩ depending on bus capacitance and rise-time requirements.

Can APX803L-17SA-7 operate with a 0.9V supply voltage?

No - while the Absolute Maximum Rating allows V_CC down to 0.9V, the Recommended Operating Conditions specify a minimum V_CC of 0.9V only for functional testing; actual reliable detection requires V_CC ≥1.02×V_TH = 1.734V per datasheet Section 5, Table "tDELAY".

Is APX803L-17SA-7 qualified for automotive applications?

No - the APX803L-17SA-7 is not AEC-Q100 qualified. Diodes Incorporated explicitly states in the datasheet that automotive-grade variants require specific change control, PPAP capability, and IATF 16949 manufacturing - none of which apply to this part. Use only in industrial or consumer applications.

APX803L-17SA-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:: 1.7V

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-17SA-7 FAQ

1.How can I place an order for APX803L-17SA-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for APX803L-17SA-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-17SA-7 reliable?

The price and inventory of APX803L-17SA-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-17SA-7 is usually 5 days.

3.What payment methods are accepted for APX803L-17SA-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L-17SA-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for APX803L-17SA-7?

APX803L-17SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your APX803L-17SA-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-17SA-7?

For technical support, including APX803L-17SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L-17SA-7 requirements.

6.How does Aetrix verify that APX803L-17SA-7 is sourced from the original manufacturer or authorized distributors?

All APX803L-17SA-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-17SA-7 meets industry standards.

7.What is the process for return or replacement of APX803L-17SA-7?

All APX803L-17SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L-17SA-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-17SA-7 part is unused and in its original packaging.

Return procedure for APX803L-17SA-7:

1.Submit a request within 90 days.

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

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