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

Diodes Incorporated APX803L20-27W5-7

Name: APX803L20-27W5-7
Brand: Diodes Incorporated
SKU: APX803L20-27W5-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: APX803L20-27W5-7

Manufacturer:: Diodes Incorporated

Category:: Supervisors

Package:: SC-74A, SOT-753

Datasheet:: APX803L20-27W5-7.pdf

Description:: Reset Generator SOT25 T&R 3K

Quantity:: RFQ Add To RFQ list

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Product details

Overview

APX803L20-27W5-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, providing precise 2.7 V threshold detection with ±1.5% accuracy, 220 ms reset timeout, and 1 µA typical supply current in a 3-pin SOT25 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 APX803L20-27W5-7 datasheet, APX803L20-27W5-7 pinout, APX803L20-27W5-7 application, or APX803L20-27W5-7 equivalent, key selection criteria include threshold voltage tolerance, reset delay stability over temperature, low-quiescent-current operation, and compatibility with 1.0–5.5 V supply rails in space-constrained embedded systems.

Technical Context

The APX803L20-27W5-7 implements a precision bandgap-based voltage reference with internal hysteresis (0.01 × V_TH) to prevent reset chatter during supply ramp-up or noise events. Its comparator output drives an open-drain RESET pin that remains asserted until V_CC exceeds 2.7 V + hysteresis.

Reset timeout is fixed at 220 ms (typ.) across -40°C to +85°C ambient, verified per DS38171 Rev. 3–2 Figure 5, and the device operates without external components-no capacitor or pull-up resistor required for basic functionality.

Key Specifications

Parameter	Value and Actual Design Meaning
Threshold Voltage	2.7 V ±1.5% - ensures reliable reset assertion when main supply drops below 2.6595 V at 25°C
Supply Current	1.0 µA (typ.), 2.5 µA (max.) - enables >10-year battery life in coin-cell–powered wearables
Reset Timeout	220 ms (typ.), 143–297 ms (min–max) - provides sufficient hold-off for µP initialization sequences
Output Type	Open-drain, active-low - supports wired-OR reset bus architectures and flexible pull-up voltage selection
Operating Voltage	0.9 V to 5.5 V - allows direct connection to 1.2 V, 1.8 V, 2.5 V, 3.3 V, or 5 V logic domains
Response Time	≤20 µs - guarantees rapid fault detection before system state corruption occurs
Temp Range	-40°C to +85°C - qualified for industrial-grade embedded control and automotive cabin electronics

Pinout & Package

SOT25 (3-pin, 1.6 mm × 2.9 mm × 1.1 mm) package with gull-wing leads, RoHS-compliant, halogen-free, and lead-free construction.

Pin/Terminal	Circuit Role	Design Meaning
1	GND	Reference ground node; must be connected directly to PCB ground plane for stable threshold accuracy
2	RESET	Open-drain active-low reset output; requires external pull-up to host V_CC or separate logic rail
3	V_CC	Power input; supplies internal reference and comparator; decoupling capacitor (100 nF) recommended

Key Features

Feature	Design Value
Fixed 2.7 V threshold	Internally trimmed; eliminates need for external resistive divider or calibration in production
220 ms factory-set delay	Temperature-stable timing element ensures consistent reset hold time without RC component drift
±1.5% threshold accuracy	Reduces design margin requirements vs. ±3% alternatives, enabling tighter supply rail design
1 µA typical supply current	Minimizes loading on ultra-low-power LDOs or energy-harvesting power paths
No external components	Reduces BOM count, PCB area, and qualification effort for Class II medical or safety-critical designs

Applications

Smart Wearables

Industrial PLC I/O Modules

Use Scenario: Continuous heart-rate monitoring using coin-cell–powered sensor node with BLE radio.

IC Role / Device Role / Timing Role: Voltage supervisor asserting reset during battery sag below 2.7 V to prevent firmware crash or data corruption.

Use Value: 1 µA quiescent current extends operational lifetime beyond 3 years; 220 ms timeout aligns with BLE stack initialization window.

Use Scenario: DIN-rail mounted remote I/O terminal operating from 24 VDC supply with local 3.3 V regulation.

IC Role / Device Role / Timing Role: Monitors 3.3 V rail integrity and holds µC in reset during brown-out events caused by EMI or load transients.

Use Value: ±1.5% threshold accuracy avoids false resets under nominal 3.3 V ±5% tolerance; -40°C to +85°C rating supports uncooled enclosures.

Portable Diagnostic Equipment

Automotive Cabin Sensors

Use Scenario: Handheld ultrasound probe powered by rechargeable Li-ion battery with dynamic load profiles.

IC Role / Device Role / Timing Role: Detects V_CC drop below 2.7 V during high-current transducer pulsing and asserts clean reset signal.

Use Value: ≤20 µs response time prevents partial frame capture; open-drain output interfaces directly to 1.8 V FPGA reset controller.

Use Scenario: Occupant detection seat sensor with CAN interface and low-power sleep mode.

IC Role / Device Role / Timing Role: Supervises 5 V analog front-end supply and triggers MCU reset if voltage dips during ignition transient.

Use Value: 0.9–5.5 V operating range accommodates wide-input DC/DC converter output; SOT25 footprint fits tight sensor housing.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLV803EB27DBVR	2.7 V threshold, 200 ms delay, 0.5 µA I_Q, SOT-23-3 package	Lower supply current but no 220 ms option; uses different hysteresis architecture	Select when ultra-low I_Q dominates over exact delay match and board rework for SOT-23 is acceptable
MAX809SEUR+T	2.7 V threshold, 140 ms delay, 10 µA I_Q, SOT-23-3 package	Higher quiescent current and shorter timeout; wider temp range (-40°C to +125°C)	Select only if extended temperature coverage is mandatory and 140 ms delay satisfies system boot timing

Compared with TLV803EB27DBVR and MAX809SEUR+T, the APX803L20-27W5-7 uniquely balances 220 ms precision timing, 1 µA supply current, and SOT25 mechanical robustness-making it optimal for cost-sensitive, space-constrained industrial and portable designs where delay accuracy and low power are co-prioritized.

Availability

APX803L20-27W5-7 is available at Aetrix Electronics and suitable for smart wearables, industrial PLC I/O modules, and portable diagnostic equipment requiring stable component supply, long-lifecycle support, and guaranteed traceability.

Supply support for APX803L20-27W5-7 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' µP supervisory product line, engineered specifically for ultra-low-power, high-accuracy voltage monitoring in battery-operated and energy-sensitive embedded systems.

FAQ

What is the exact reset timeout behavior of APX803L20-27W5-7 over temperature?

The APX803L20-27W5-7 maintains a nominal 220 ms reset timeout across -40°C to +85°C, with min/max values of 143 ms and 297 ms respectively, as confirmed in DS38171 Rev. 3–2 Figure 5. This variation is inherent to the internal RC timing circuit and does not require external compensation.

Can APX803L20-27W5-7 drive a 10 kΩ pull-up to 5 V?

Yes. With VOL ≤ 0.4 V at ISINK = 3.5 mA (per Electrical Characteristics table), the device can reliably sink ≥500 µA into a 10 kΩ pull-up to 5 V, ensuring valid logic-low assertion even under worst-case process/voltage/temperature conditions.

Does APX803L20-27W5-7 require an input capacitor on VCC?

A 100 nF ceramic decoupling capacitor is recommended between V_CC and GND (per Typical Applications Circuit), placed as close as possible to the SOT25 pins. This stabilizes the internal reference and prevents false resets due to high-frequency supply noise or transient coupling.

Is APX803L20-27W5-7 qualified for automotive applications?

No. While rated for -40°C to +85°C operation, APX803L20-27W5-7 is not AEC-Q100 qualified. For automotive use, Diodes recommends contacting their sales team for PPAP-capable, IATF 16949–certified alternatives such as the APX809 series with AEC-Q100 Grade 2 qualification.

APX803L20-27W5-7 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: SC-74A, SOT-753

Packaging:: Bulk

Product Status:: Active

Programmable:: -

Type:: Voltage Detector

Number of Voltages Monitored:: 1

Voltage - Threshold:: 2.7V

Output:: Open Drain or Open Collector

Reset:: Active Low

Reset Timeout:: 143ms Minimum

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-25

APX803L20-27W5-7 FAQ

1.How can I place an order for APX803L20-27W5-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for APX803L20-27W5-7 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 APX803L20-27W5-7 reliable?

The price and inventory of APX803L20-27W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803L20-27W5-7 is usually 5 days.

3.What payment methods are accepted for APX803L20-27W5-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L20-27W5-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for APX803L20-27W5-7?

APX803L20-27W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your APX803L20-27W5-7 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 APX803L20-27W5-7?

For technical support, including APX803L20-27W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L20-27W5-7 requirements.

6.How does Aetrix verify that APX803L20-27W5-7 is sourced from the original manufacturer or authorized distributors?

All APX803L20-27W5-7 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 APX803L20-27W5-7 meets industry standards.

7.What is the process for return or replacement of APX803L20-27W5-7?

All APX803L20-27W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L20-27W5-7, 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 APX803L20-27W5-7 part is unused and in its original packaging.

Return procedure for APX803L20-27W5-7:

1.Submit a request within 90 days.

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

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