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Diodes Incorporated APX803L-25SA-7
- Part No.:
- APX803L-25SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX803L-25SA-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,787
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Product details
Overview
APX803L-25SA-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, providing precise 2.5V threshold detection with ±1.5% accuracy, 1µA typical supply current, and open-drain active-low reset output in SOT23-3 package. It monitors VCC in battery-powered systems and triggers reset when supply drops below threshold, holding reset until recovery.
For engineers reviewing the APX803L-25SA-7 datasheet, APX803L-25SA-7 pinout, APX803L-25SA-7 application, or APX803L-25SA-7 equivalent, key selection criteria include fixed 2.5V detection level, 0ms/55ms/220ms/450ms programmable delay options, low-quiescent-current operation, and compatibility with microprocessor power-up sequencing and brown-out protection.
Technical Context
The APX803L-25SA-7 integrates a precision bandgap reference and comparator to deliver stable 2.5V detection across -40°C to +85°C ambient range, with 50 ppm/°C temperature coefficient and 10mV hysteresis (0.01×VTH). Its internal fixed threshold eliminates external resistor networks and calibration.
It features an open-drain RESET output capable of sinking 3.5mA at 0.4V max VOL, supports direct connection to µP reset inputs, and requires no external components-enabling compact, low-BOM-count supervision in space-constrained designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Detection Voltage | 2.5V fixed threshold with ±1.5% accuracy at +25°C - ensures reliable reset assertion within tight supply tolerance bands. |
| Supply Current | 1.0µA typical, 2.5µA max - enables multi-year operation in coin-cell–powered IoT sensors without measurable battery drain. |
| Reset Delay Options | 0ms, 55ms, 220ms, or 450ms - selectable via part number suffix to match processor boot timing requirements. |
| Output Type | Open-drain, active-low RESET - allows wired-OR configuration and flexible pull-up voltage selection (up to 5.5V). |
| Response Time | 20µs max VCC drop-to-reset assertion - provides fast fault response during transient undervoltage events. |
| Operating Voltage Range | 0.9V to 5.5V VCC - supports supervision of 1.2V, 1.8V, 2.5V, 3.3V, and 5V rails without external biasing. |
| Temperature Range | -40°C to +85°C - qualified for industrial and extended-temperature embedded applications. |
Pinout & Package
SOT23-3 package (3-pin, 1.3mm × 2.9mm × 1.1mm), RoHS-compliant, lead-free, halogen-free "Green" construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal circuitry and reset output sink path. |
| 2 | RESET | Open-drain active-low reset output; must be externally pulled up to host logic rail. |
| 3 | VCC | Power input pin; supplies internal reference and comparator; also monitored voltage source. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low supply current | 1.0µA typical enables >10-year battery life in always-on monitoring nodes. |
| Fixed 2.5V threshold | Internally trimmed; eliminates external resistors and layout sensitivity in portable designs. |
| Programmable reset timeout | Four factory-set delay options (0/55/220/450ms) simplify BOM management versus adjustable RC solutions. |
| Fast reset assertion | 20µs response time ensures µP reset occurs before core logic enters undefined state during brown-out. |
| No external components | Self-contained supervision reduces PCB area, assembly cost, and qualification effort for high-reliability systems. |
Applications
| Smart Wearables | Industrial PLC Modules |
|---|---|
|
Use Scenario: Real-time health sensor node powered by CR2032 coin cell with BLE SoC. IC Role / Device Role / Timing Role: Monitors 2.5V LDO output feeding BLE MCU; asserts RESET on voltage sag during RF transmit burst. Use Value: Prevents firmware corruption during intermittent power dips while consuming <1µA in sleep mode. |
Use Scenario: DIN-rail mounted controller with 24V DC input and isolated 3.3V logic rail. IC Role / Device Role / Timing Role: Supervises 3.3V microcontroller supply derived from DC-DC converter; holds reset until stable after cold start. Use Value: Guarantees deterministic boot sequence and avoids watchdog timeout due to slow-ramp power rails. |
| Medical Point-of-Care Devices | Automotive Body Control Modules |
|
Use Scenario: Handheld glucose meter with dual-battery backup and LCD display. IC Role / Device Role / Timing Role: Detects 2.5V main supply collapse and initiates graceful shutdown before memory loss. Use Value: Preserves last-measurement data and prevents erroneous readings during low-battery transitions. |
Use Scenario: Door module with LIN interface, LED drivers, and wake-on-LIN capability. IC Role / Device Role / Timing Role: Supervises 5V system rail powering MCU and transceiver; resets logic if ignition voltage sags below spec. Use Value: Ensures fail-safe behavior during load-dump or cranking events without requiring AEC-Q100 requalification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G125DBVR | 2.5V threshold, 350ms fixed delay, 1.1µA supply current, SOT23-6 package. | Requires external pull-up and occupies larger footprint; supports manual reset input. | Select when manual reset override or longer delay is required; not pin-compatible. |
| MAX809SEUR+T | 2.5V threshold, 140ms min delay, 10µA supply current, SOT23-3 package. | Higher quiescent current limits use in ultra-low-power battery systems; same pinout. | Choose only if legacy design reuse is critical; APX803L-25SA-7 offers 10× lower ICC and tighter VTH accuracy. |
Compared with TPS3808G125DBVR and MAX809SEUR+T, the APX803L-25SA-7 delivers superior power efficiency (1µA vs. ≥10µA), tighter threshold accuracy (±1.5% vs. ±2.5%), and identical SOT23-3 footprint-making it optimal for next-gen portable and energy-harvested systems where supply current and precision directly impact runtime and reliability.
Availability
APX803L-25SA-7 is available at Aetrix Electronics and suitable for smart wearables, industrial PLC modules, and medical point-of-care devices requiring stable component supply with guaranteed long-term continuity.
Supply support for APX803L-25SA-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 manufacturing certified to IATF 16949 and quality systems aligned with AEC-Q200 for automotive-grade components.
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 detection threshold voltage for APX803L-25SA-7?
The APX803L-25SA-7 has a factory-trimmed fixed detection threshold of 2.5V with ±1.5% accuracy over temperature (–40°C to +85°C), verified per DS38171 Rev. 3–2 electrical characteristics table. This value is internally set and non-adjustable.
Does APX803L-25SA-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 host logic rail (e.g., 3.3V or 5V) is mandatory for proper reset signal generation. Typical values range from 10kΩ to 100kΩ depending on bus capacitance and rise-time requirements.
Can APX803L-25SA-7 monitor voltages other than 2.5V?
No - the "25" in the part number denotes a fixed 2.5V threshold. Diodes offers variants from 1.2V to 5.0V in 0.1V steps (e.g., APX803L-33SA-7 = 3.3V), but each part number is calibrated for one specific voltage and cannot be reconfigured.
What is the reset timeout delay for APX803L-25SA-7?
The APX803L-25SA-7 uses the base part number format without delay suffix (e.g., "05", "20", "40"), indicating a 0ms reset timeout - meaning RESET deasserts immediately once VCC rises above 2.5V + hysteresis (≈2.525V). Delay options require explicit suffixes like APX803L20-25SA-7 (220ms).
APX803L-25SA-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:
- 2.5V
- 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-25SA-7 FAQ
1.How can I place an order for APX803L-25SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803L-25SA-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-25SA-7 reliable?
The price and inventory of APX803L-25SA-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-25SA-7 is usually 5 days.
3.What payment methods are accepted for APX803L-25SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L-25SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803L-25SA-7?
APX803L-25SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803L-25SA-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-25SA-7?
For technical support, including APX803L-25SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L-25SA-7 requirements.
6.How does Aetrix verify that APX803L-25SA-7 is sourced from the original manufacturer or authorized distributors?
All APX803L-25SA-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-25SA-7 meets industry standards.
7.What is the process for return or replacement of APX803L-25SA-7?
All APX803L-25SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L-25SA-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-25SA-7 part is unused and in its original packaging.
Return procedure for APX803L-25SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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