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

Diodes Incorporated APX803L40-14SA-7

Name: APX803L40-14SA-7
Brand: Diodes Incorporated
SKU: APX803L40-14SA-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: APX803L40-14SA-7

Manufacturer:: Diodes Incorporated

Category:: Supervisors

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

Datasheet:: APX803L40-14SA-7.pdf

Description:: IC SUPERVISOR 1 CHANNEL SOT23

Quantity:: RFQ Add To RFQ list

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Product details

Overview

APX803L40-14SA-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, providing 4.0V fixed threshold detection with ±1.5% accuracy, 450ms reset timeout, and 1µA typical supply current in SOT23-3 package. It delivers active-low open-drain reset signaling for power monitoring in battery-powered IoT sensors and portable medical devices.

For engineers reviewing the APX803L40-14SA-7 datasheet, APX803L40-14SA-7 pinout, APX803L40-14SA-7 application, or APX803L40-14SA-7 equivalent, key selection criteria include threshold voltage tolerance, reset delay stability over temperature, low-quiescent-current operation, and compatibility with 1.8V–5.5V supply rails in space-constrained embedded systems.

Technical Context

The APX803L40-14SA-7 implements a precision bandgap-based voltage reference with hysteresis (0.01×V_TH) to prevent oscillation during V_CC recovery. Its internal comparator triggers an active-low reset signal when V_CC drops below 4.0V and holds it until V_CC exceeds 4.016V (typical release voltage).

Reset assertion occurs within 20µs of V_CC crossing the falling threshold, and the 450ms timeout is factory-programmed-no external capacitor required. The device operates across –40°C to +85°C ambient and supports sink currents up to 20mA on the open-drain RESET pin.

Key Specifications

Parameter	Value and Actual Design Meaning
Threshold Voltage	4.0V ±1.5% - ensures reliable reset initiation at precisely defined supply rail collapse point
Supply Current	1.0µA (typ.), 2.5µA (max.) - enables multi-year battery life in always-on wearables
Reset Timeout	450ms (typ.) - provides sufficient hold time for full µP initialization after power recovery
Response Time	20µs - guarantees rapid fault detection before system state corruption
Output Type	Open-drain, active-low - allows wired-OR reset bus configuration with multiple supervisors
Operating Voltage	0.9V to 5.5V - supports direct connection to 1.8V, 3.3V, and 5V logic 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 × 1.0mm), RoHS-compliant, lead-free, halogen-free "Green" construction.

Pin/Terminal	Circuit Role	Design Meaning
1	GND	Ground reference for internal circuitry and reset output pull-down path
2	RESET	Open-drain output; sinks current when asserted low; requires external pull-up
3	V_CC	Power input; supplies internal reference, comparator, and output stage

Key Features

Feature	Design Value
Fixed 4.0V threshold	Eliminates external resistor divider, reducing BOM count and layout area by 3 components
450ms factory-set delay	Removes need for timing capacitor and associated leakage/temperature drift concerns
±1.5% threshold accuracy	Guarantees deterministic reset behavior across voltage and temperature without calibration
20µs fast response	Prevents brown-out-induced register corruption in high-speed µCs operating above 24MHz
No external components	Enables single-chip supervision solution in 2.9mm² footprint for ultra-compact PCBs

Applications

Smart Wearable Sensors

Industrial PLC I/O Modules

Use Scenario: Continuous glucose monitor with coin-cell battery and BLE radio.

IC Role / Device Role / Timing Role: Voltage supervisor ensuring clean µC reset during battery sag under RF transmit bursts.

Use Value: 1µA quiescent current extends battery life beyond 18 months; 450ms timeout prevents premature wake-up before analog front-end stabilization.

Use Scenario: DIN-rail mounted digital input module powered from 24VDC supply with local 3.3V LDO.

IC Role / Device Role / Timing Role: Monitors 3.3V rail integrity and asserts reset if LDO fails or load transient exceeds regulation.

Use Value: ±1.5% threshold accuracy eliminates false resets during 100mV ripple; open-drain output interfaces directly to PLC controller's reset input.

Portable Medical Diagnostic Devices

Edge AI Inference Nodes

Use Scenario: Handheld ultrasound probe with FPGA-based beamformer and rechargeable Li-ion pack.

IC Role / Device Role / Timing Role: Supervises 1.2V core rail for FPGA configuration memory and ensures safe power-down sequence.

Use Value: 20µs response captures sub-cycle supply dips; 4.0V threshold aligns with FPGA V_CCINT minimum specification.

Use Scenario: Battery-powered vision sensor using RISC-V SoC and low-power image sensor.

IC Role / Device Role / Timing Role: Detects 3.3V I/O rail collapse during deep-sleep exit and synchronizes peripheral re-initialization.

Use Value: Factory-programmed 450ms delay matches SoC boot ROM execution time; SOT23-3 footprint fits 0402-level routing density.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TPS3808G33DBVR	3.3V fixed threshold, 200ms default delay, 1.6µA supply current	Requires external capacitor for adjustable delay; no 4.0V option	Select only if system uses 3.3V rail and needs programmable timeout
MAX809SEUR+T	3.08V threshold, 240ms min delay, 12µA supply current	Higher ICC reduces battery lifetime; limited temp range (–40°C to +85°C same)	Acceptable for cost-sensitive non-battery applications where 12µA is tolerable

Compared with TPS3808G33DBVR and MAX809SEUR+T, the APX803L40-14SA-7 uniquely delivers 4.0V detection with lowest ICC (1µA typ.) and factory-trimmed 450ms delay-critical for long-life 4.0V-supplied microcontrollers in compact designs.

Availability

APX803L40-14SA-7 is available at Aetrix Electronics and suitable for smart wearable sensors, industrial PLC I/O modules, and portable medical diagnostic devices requiring stable component supply across extended production lifecycles.

Supply support for APX803L40-14SA-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 for power management, signal integrity, and connectivity applications.

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

FAQ

What is the exact reset threshold voltage and tolerance for APX803L40-14SA-7?

The APX803L40-14SA-7 has a nominal reset threshold of 4.0V with a guaranteed accuracy of ±1.5% over temperature (–40°C to +85°C) and supply voltage (0.9V to 5.5V). This corresponds to a minimum threshold of 3.94V and maximum of 4.06V at +25°C, confirmed in Electrical Characteristics Table (DS38171 Rev. 3-2, p.3).

Does APX803L40-14SA-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 (typically 10kΩ to V_CC or host logic rail) is mandatory to establish a valid high-level signal during normal operation. No internal pull-up is integrated, per Pin Descriptions section (DS38171 p.2).

Can APX803L40-14SA-7 operate with a 1.8V supply rail?

Yes - the device functions across V_CC = 0.9V to 5.5V, verified in Recommended Operating Conditions (DS38171 p.3). At 1.8V, it maintains full 4.0V threshold detection and 450ms timeout, though RESET sink capability is reduced to ~8mA (per Output Sink Current vs. Input Voltage curves, p.6).

Is APX803L40-14SA-7 qualified for automotive applications?

No - APX803L40-14SA-7 is not AEC-Q100 qualified. Diodes states that automotive-grade variants require specific change control, PPAP capability, and IATF 16949 manufacturing; this part is rated for industrial/consumer use only (–40°C to +85°C), per Notes section (DS38171 p.1).

APX803L40-14SA-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:: 1.4V

Output:: Open Drain or Open Collector

Reset:: Active Low

Reset Timeout:: 292ms Minimum

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3

APX803L40-14SA-7 FAQ

1.How can I place an order for APX803L40-14SA-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for APX803L40-14SA-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 APX803L40-14SA-7 reliable?

The price and inventory of APX803L40-14SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803L40-14SA-7 is usually 5 days.

3.What payment methods are accepted for APX803L40-14SA-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L40-14SA-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for APX803L40-14SA-7?

APX803L40-14SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your APX803L40-14SA-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 APX803L40-14SA-7?

For technical support, including APX803L40-14SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L40-14SA-7 requirements.

6.How does Aetrix verify that APX803L40-14SA-7 is sourced from the original manufacturer or authorized distributors?

All APX803L40-14SA-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 APX803L40-14SA-7 meets industry standards.

7.What is the process for return or replacement of APX803L40-14SA-7?

All APX803L40-14SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L40-14SA-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 APX803L40-14SA-7 part is unused and in its original packaging.

Return procedure for APX803L40-14SA-7:

1.Submit a request within 90 days.

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

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