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

Diodes Incorporated APX803L-12SA-7

Name: APX803L-12SA-7
Brand: Diodes Incorporated
SKU: APX803L-12SA-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: APX803L-12SA-7

Manufacturer:: Diodes Incorporated

Category:: Supervisors

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

Datasheet:: APX803L-12SA-7.pdf

Description:: IC SUPERVISOR 1 CHANNEL SOT23

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Product details

Overview

APX803L-12SA-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, providing precise 1.2V threshold detection with ±1.5% accuracy, 1µA typical supply current, and open-drain active-low reset output in SOT23-3 package-used in battery-powered IoT sensors and portable medical devices to ensure reliable power-on reset sequencing.

For engineers reviewing the APX803L-12SA-7 datasheet, APX803L-12SA-7 pinout, APX803L-12SA-7 application, or APX803L-12SA-7 equivalent, key selection criteria include threshold voltage tolerance, reset timeout options (0/55/220/450ms), low-quiescent-current operation, and SOT23-3 footprint compatibility with space-constrained embedded designs.

Technical Context

The APX803L-12SA-7 implements a precision bandgap-based voltage reference with built-in hysteresis (0.01×V_TH) to prevent reset chatter during supply ramp-up or brownout conditions. Its internal fixed 1.2V detection threshold is laser-trimmed during wafer test to achieve ±1.5% initial accuracy across -40°C to +85°C ambient range.

This device operates as a standalone supervisor with no external components required: V_CC powers the circuit, GND provides reference, and RESET outputs an open-drain signal that pulls low when V_CC drops below 1.2V and remains asserted until V_CC exceeds 1.2V + hysteresis, with propagation delay under 20µs.

Key Specifications

Parameter	Value and Actual Design Meaning
Reset Threshold	1.2V ±1.5% - ensures accurate power-fail detection for 1.2V logic rails and low-voltage microcontrollers
Supply Current	1.0µA typical - enables multi-year battery life in coin-cell-powered wearables and remote sensors
Reset Timeout	0ms - delivers immediate reset assertion upon undervoltage, suitable for fast-recovery systems
Output Type	Open-drain, active-low - allows wired-OR reset bus sharing and flexible pull-up voltage selection
Propagation Delay	<20µs - guarantees rapid fault response before system state corruption occurs
Operating Voltage	0.9V to 5.5V - supports wide-input applications including single-cell Li-ion and 3.3V/5V domains
Temperature Range	-40°C to +85°C - validated for industrial and consumer-grade embedded environments

Pinout & Package

SOT23-3 package (3-pin, 1.3mm × 2.9mm, 0.95mm height) with gull-wing leads, RoHS-compliant, lead-free, halogen-free construction.

Pin/Terminal	Circuit Role	Design Meaning
1	GND	Ground reference for internal comparator and output stage; must be connected to system ground plane
2	RESET	Open-drain active-low reset output; requires external pull-up resistor to define logic-high level
3	V_CC	Power supply input; monitors this rail for undervoltage condition and powers internal circuitry

Key Features

Feature	Design Value
Ultra-low supply current	1.0µA typical enables >10-year battery life in always-on sensor nodes
Precision threshold accuracy	±1.5% over temperature eliminates need for external calibration in cost-sensitive designs
Fast reset response	<20µs propagation delay prevents CPU lockup during transient supply dips
No external components	Self-contained operation reduces BOM count and PCB area vs. discrete supervisor solutions
Multiple timeout options	0ms variant supports deterministic reset timing without added RC delay networks

Applications

Smart Wearable Sensors

Industrial PLC I/O Modules

Use Scenario: Continuous monitoring of coin-cell voltage in fitness trackers with BLE connectivity.

IC Role / Device Role / Timing Role: Voltage supervisor ensuring clean processor reset before firmware execution begins.

Use Value: Prevents corrupted memory writes during brownout by asserting reset within 20µs at 1.2V threshold.

Use Scenario: Power monitoring for 24V DC-powered digital input cards in factory automation.

IC Role / Device Role / Timing Role: Standalone reset generator for ARM Cortex-M4 microcontroller on isolated I/O board.

Use Value: Guarantees deterministic boot sequence after field wiring-induced supply transients.

Portable Medical Devices

Edge AI Inference Nodes

Use Scenario: Battery-backed glucose meter with LCD display and USB charging interface.

IC Role / Device Role / Timing Role: Primary supervisor for main SoC and analog front-end ASIC.

Use Value: Delivers 1.2V detection with ±1.5% accuracy across -20°C to +60°C operating range.

Use Scenario: Low-power vision sensor node using RISC-V MCU and neural network accelerator.

IC Role / Device Role / Timing Role: Reset controller coordinating power-up sequencing between core and peripheral domains.

Use Value: Enables zero-delay reset assertion (0ms timeout) for strict timing-critical boot protocols.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TPS3808G12DBVR	Higher quiescent current (800nA min, 1.8µA typ), tighter threshold accuracy (±0.5%), adjustable delay via capacitor	Requires external timing capacitor; better suited for designs needing programmable timeout	Select when higher accuracy and configurable delay outweigh ultra-low IQ requirement
MAX6326UR12+T	Higher supply current (2.5µA typ), same 1.2V threshold, 200ms fixed delay, SC70-3 package	Fixed 200ms delay only; incompatible pinout (RESET on pin 1 vs. pin 2 on APX803L)	Choose only if 200ms delay is mandatory and SC70 footprint acceptable

Compared with TPS3808G12DBVR and MAX6326UR12+T, the APX803L-12SA-7 offers the lowest supply current (1µA typ) and direct SOT23-3 pin compatibility, making it optimal for space- and energy-constrained designs where fixed 0ms reset timing is acceptable.

Availability

APX803L-12SA-7 is available at Aetrix Electronics and suitable for smart wearable sensors, industrial PLC I/O modules, and portable medical devices requiring stable component supply with long-term lifecycle support.

Supply support for APX803L-12SA-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 ICs, with design centers in Asia, Europe, and the U.S., serving industrial, computing, communications, and consumer markets.

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

FAQ

What is the exact reset threshold voltage and its tolerance for APX803L-12SA-7?

The APX803L-12SA-7 has a nominal reset threshold of 1.2V with ±1.5% accuracy over the full operating temperature range (-40°C to +85°C), verified per Electrical Characteristics table in DS38171 Rev. 3–2. This corresponds to a guaranteed detection window of 1.182V to 1.218V at +25°C, tightening to 1.178V–1.222V across temperature.

Does APX803L-12SA-7 require any external components to function?

No external components are required. The APX803L-12SA-7 operates as a fully self-contained voltage supervisor: only V_CC, GND, and a pull-up resistor on the open-drain RESET pin are needed. No capacitors, resistors, or trimming elements are necessary for basic reset functionality or timing.

What is the meaning of the "-7" suffix in APX803L-12SA-7?

The "-7" suffix denotes tape-and-reel packaging: 3,000 units per 7-inch reel. This is standard for automated SMT assembly and confirmed in the Ordering Information section of DS38171, where "7" is explicitly defined as "Tape & Reel" packing code.

Can APX803L-12SA-7 drive a 10kΩ pull-up resistor to 3.3V reliably?

Yes. With VOL ≤ 0.4V at ISINK = 3.5mA (per datasheet), the APX803L-12SA-7 can easily sink >300µA into a 10kΩ pull-up to 3.3V (I = 3.3V/10kΩ = 330µA), maintaining valid logic-low levels well within specification and ensuring robust noise immunity in noisy industrial environments.

APX803L-12SA-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:: 1.2V

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-12SA-7 FAQ

1.How can I place an order for APX803L-12SA-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for APX803L-12SA-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-12SA-7 reliable?

The price and inventory of APX803L-12SA-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-12SA-7 is usually 5 days.

3.What payment methods are accepted for APX803L-12SA-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L-12SA-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for APX803L-12SA-7?

APX803L-12SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your APX803L-12SA-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-12SA-7?

For technical support, including APX803L-12SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L-12SA-7 requirements.

6.How does Aetrix verify that APX803L-12SA-7 is sourced from the original manufacturer or authorized distributors?

All APX803L-12SA-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-12SA-7 meets industry standards.

7.What is the process for return or replacement of APX803L-12SA-7?

All APX803L-12SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L-12SA-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-12SA-7 part is unused and in its original packaging.

Return procedure for APX803L-12SA-7:

1.Submit a request within 90 days.

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

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