Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

Diodes Incorporated APX803L40-27SA-7

Name: APX803L40-27SA-7
Brand: Diodes Incorporated
SKU: APX803L40-27SA-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: APX803L40-27SA-7

Manufacturer:: Diodes Incorporated

Category:: Supervisors

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

Datasheet:: APX803L40-27SA-7.pdf

Description:: IC SUPERVISOR 1 CHANNEL SOT23

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:2,617

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

APX803L40-27SA-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 embedded digital systems. It features a fixed 2.7V detection threshold (±1.5% accuracy), 450ms reset timeout, 1µA typical supply current, and open-drain active-low RESET output - enabling reliable power-on reset and brownout protection in portable instrumentation and IoT edge nodes.

For engineers reviewing the APX803L40-27SA-7 datasheet, APX803L40-27SA-7 pinout, APX803L40-27SA-7 application, or APX803L40-27SA-7 equivalent, this device delivers precise, low-burden voltage supervision with factory-set delay timing and no external components required - critical for space-constrained, energy-sensitive designs requiring deterministic reset behavior under varying temperature and load conditions.

Technical Context

The APX803L40-27SA-7 integrates a precision bandgap reference, comparator, and internal timer to generate a clean active-low reset pulse when V_CC drops below 2.7V. Its hysteresis (0.01×V_TH) prevents chatter during threshold crossing, and its 20µs response time ensures rapid fault capture.

Operating from 0.9V to 5.5V supply, it maintains ±1.5% threshold accuracy over −40°C to +85°C and exhibits only 50 ppm/°C temperature coefficient - making it suitable for industrial-grade power monitoring where thermal drift must be minimized without calibration.

Key Specifications

Parameter	Value and Actual Design Meaning
Detection Threshold	2.7V ±1.5% - factory-trimmed for accurate brownout detection without external resistors
Reset Timeout	450ms (typ.) - fixed internal delay ensures sufficient system stabilization before release
Supply Current	1.0µA (typ.), 2.5µA (max.) - enables multi-year operation in coin-cell–powered devices
Output Type	Open-drain, active-low - supports wired-OR reset buses and flexible pull-up voltage selection
Response Time	20µs - guarantees fast reset assertion during rapid V_CC collapse
Operating Temp	−40°C to +85°C - validated for industrial ambient environments without derating
Hysteresis	0.01×V_TH (27mV) - suppresses false resets near threshold due to noise or ripple

Pinout & Package

SOT23-3 package (JEDEC TO-236AB), 1.3mm × 2.9mm footprint, surface-mount, RoHS-compliant, lead-free.

Pin/Terminal	Circuit Role	Design Meaning
1	GND	Reference ground return path for internal comparator and timer circuitry
2	RESET	Open-drain output; pulled low when V_CC < 2.7V; requires external pull-up
3	V_CC	Power input pin; supplies internal circuitry and senses monitored rail

Key Features

Feature	Design Value
No external components	Internal threshold and timing eliminate need for resistors, capacitors, or trimming
Low supply current	1µA typical draw minimizes impact on battery life in always-on monitoring applications
Fixed 450ms delay	Factory-programmed timeout ensures consistent reset hold duration across units and temperatures
High accuracy threshold	±1.5% tolerance at +25°C and stable over temperature reduces design margin uncertainty
Robust ESD rating	±4000V HBM withstand capability supports handling in non-ESD-controlled assembly environments

Applications

Portable Medical Sensors

Industrial PLC I/O Modules

Use Scenario: Continuous glucose monitor with coin-cell power and BLE transmission.

IC Role / Device Role / Timing Role: Voltage supervisor asserting RESET until V_CC stabilizes post-battery insertion or wake-up.

Use Value: Prevents firmware execution at insufficient voltage, eliminating corrupted sensor reads or radio transmission errors.

Use Scenario: DIN-rail mounted digital input module operating in factory-floor cabinets.

IC Role / Device Role / Timing Role: Monitors 3.3V logic rail derived from isolated DC-DC converter; holds µC in reset during input transients.

Use Value: Ensures deterministic startup after power interruption, avoiding spurious I/O state changes during recovery.

Smart Meter Data Loggers

Wireless Gateway Power Sequencing

Use Scenario: Battery-backed electricity meter storing consumption data during outages.

IC Role / Device Role / Timing Role: Detects 2.7V brownout on backup supercapacitor rail and triggers controlled shutdown sequence.

Use Value: Guarantees EEPROM write completion before power loss, preserving billing integrity.

Use Scenario: Multi-rail gateway powering Wi-Fi SoC, Zigbee MCU, and cellular modem.

IC Role / Device Role / Timing Role: Provides 450ms reset hold to coordinate sequencing of 1.8V, 3.3V, and 5V rails via enable signals.

Use Value: Eliminates race conditions between subsystems, preventing boot failures caused by premature clock or interface activation.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLV803E27DBZR	2.7V threshold, 200ms delay, 0.5µA supply current; SOT23-3 package	Lacks 450ms option; shorter delay may be insufficient for slow-ramping power supplies	Select if lower quiescent current is prioritized and system startup timing allows shorter reset hold
MAX809SEUR+T	2.7V threshold, 140ms delay, 10µA supply current; SOT23-3 package	Higher ICC and shorter delay; less suitable for ultra-low-power or long-delay applications	Choose only if legacy compatibility with MAX809 footprint/timing is required and power budget permits

Compared with TLV803E27DBZR and MAX809SEUR+T, the APX803L40-27SA-7 uniquely combines 450ms factory-set delay, sub-µA operation, and ±1.5% accuracy - offering superior timing determinism and energy efficiency for next-generation battery-operated edge devices.

Availability

APX803L40-27SA-7 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart meter data loggers, and wireless gateway power sequencing requiring stable component supply across extended production lifecycles.

Supply support for APX803L40-27SA-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-critical and industrial embedded systems.

FAQ

What is the exact reset timeout value for APX803L40-27SA-7?

The APX803L40-27SA-7 provides a nominal reset active timeout period of 450ms, with a guaranteed range of 292ms to 608ms across temperature and process variation. This value is factory-programmed and does not require external capacitor timing components.

Can APX803L40-27SA-7 drive a standard 10kΩ pull-up resistor?

Yes - the open-drain RESET output can sink up to 20mA and maintains VOL ≤ 0.4V at ISINK = 3.5mA, ensuring robust low-state drive into common pull-up values (e.g., 10kΩ to 3.3V yields ~0.35V logic low). No level-shifting or buffering is needed.

Is the 2.7V threshold calibrated at production?

Yes - the 2.7V detection threshold is laser-trimmed during wafer sort to achieve ±1.5% accuracy at +25°C, with specified drift of only 50 ppm/°C over −40°C to +85°C. No field calibration is required or supported.

Does APX803L40-27SA-7 support operation below 1.0V V_CC?

No - the recommended minimum operating V_CC is 0.9V per datasheet specifications. Below this, internal circuitry cannot guarantee proper comparator function or reset assertion; the absolute minimum rating is −0.3V, but functional operation is not assured below 0.9V.

APX803L40-27SA-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:: 2.7V

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

APX803L40-27SA-7 FAQ

1.How can I place an order for APX803L40-27SA-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for APX803L40-27SA-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 APX803L40-27SA-7 reliable?

The price and inventory of APX803L40-27SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803L40-27SA-7 is usually 5 days.

3.What payment methods are accepted for APX803L40-27SA-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L40-27SA-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for APX803L40-27SA-7?

APX803L40-27SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your APX803L40-27SA-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 APX803L40-27SA-7?

For technical support, including APX803L40-27SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L40-27SA-7 requirements.

6.How does Aetrix verify that APX803L40-27SA-7 is sourced from the original manufacturer or authorized distributors?

All APX803L40-27SA-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 APX803L40-27SA-7 meets industry standards.

7.What is the process for return or replacement of APX803L40-27SA-7?

All APX803L40-27SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L40-27SA-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 APX803L40-27SA-7 part is unused and in its original packaging.

Return procedure for APX803L40-27SA-7:

1.Submit a request within 90 days.

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

Tech Hub

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…

2026-08-11 LDO Regulator: Dropout Voltage, Noise, PSRR and Power Dissipation

LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…

2026-08-06 Conditional Access Module: CAM, CI/CI+ and DVB Security

Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…

2026-08-03 Electronic Component Obsolescence: EOL Risks, Replacement Options and Last-Time Buy Strategy

Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.

2026-07-29 18650 Battery: Voltage, Capacity, Charging and Pack Design

18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…

2026-07-27 Hall Effect Sensor: Working Principle, Types, Circuits and Applications

Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…

2026-07-20 Product Change Notification (PCN) in Electronic Components: Meaning and Supply Chain Response

Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…

2026-07-19 Blend Door Actuator: Symptoms, Location, Reset and Replacement Guide

A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…