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Diodes Incorporated APX803L40-26SR-7
- Part No.:
- APX803L40-26SR-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX803L40-26SR-7.pdf
- Description:
- RESET GENERATOR SOT23 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:3,692
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Product details
Overview
APX803L40-26SR-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, monitoring VCC supply levels in battery-powered and embedded digital systems. It features a fixed 2.6V detection threshold (±1.5% accuracy), 450ms reset timeout, 1µA typical supply current, open-drain active-low RESET output, and operates across –40°C to +85°C ambient range - deployed in portable instrumentation and low-power microcontroller power-up sequencing.
For engineers reviewing the APX803L40-26SR-7 datasheet, APX803L40-26SR-7 pinout, APX803L40-26SR-7 application, or APX803L40-26SR-7 equivalent, key selection criteria include threshold voltage tolerance, reset delay timing stability over temperature, open-drain sink capability (3.5mA @ 0.4V), ultra-low quiescent current, and SOT23R package compatibility with space-constrained PCB layouts.
Technical Context
The APX803L40-26SR-7 implements a precision bandgap-based voltage reference and comparator architecture to detect VCC drops below 2.6V with 1.5% initial accuracy and 50ppm/°C temperature coefficient. Its internal hysteresis (0.01×VTH) prevents oscillation during slow-rising supply transitions.
Reset assertion occurs within 20µs of VCC falling below threshold; recovery requires VCC to exceed 2.6V by ≥100mV before release. The 450ms active timeout (APX803L40 variant) is factory-programmed and stable across –40°C to +125°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Detection Threshold | 2.6V ±1.5% - ensures reliable µP reset initiation at precise supply level |
| Supply Current | 1.0µA typical - enables multi-year operation in coin-cell–powered devices |
| Reset Timeout | 450ms (typ.) - guarantees sufficient hold time for full system initialization |
| Output Type | Open-drain, active-low - supports wired-OR reset buses and flexible pull-up voltage selection |
| Response Time | 20µs max - provides fast fault detection for real-time safety-critical subsystems |
| Operating Temp | –40°C to +85°C - validated for industrial and extended-temperature embedded applications |
| Threshold Hysteresis | 0.01×VTH (26mV) - eliminates chatter during marginal VCC recovery |
Pinout & Package
SOT23R (3-pin) package: compact, surface-mount, RoHS-compliant, lead-free, thermal resistance θJA = 200°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Reference ground node - must be connected directly to system power plane for noise immunity |
| 2 | RESET | Open-drain output - sinks up to 3.5mA; requires external pull-up for logic-level compatibility |
| 3 | VCC | Supply input - powers internal circuitry; accepts 0.9V to 5.5V with no external components |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ICC | 1.0µA typ. - reduces standby power loss in always-on IoT edge nodes |
| Fixed threshold | 2.6V with 0.1V step granularity - eliminates external resistor network calibration |
| Factory-set delay | 450ms timeout - removes need for external RC timing components and layout sensitivity |
| High accuracy | ±1.5% VTH - ensures deterministic reset behavior across production lots and temperature |
| No external parts | Self-contained supervision - simplifies BOM, reduces footprint, improves reliability |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Battery-powered glucose meters and pulse oximeters requiring guaranteed power-on reset before sensor activation. IC Role / Device Role / Timing Role: Voltage supervisor initiating hard reset of ARM Cortex-M0+ MCU upon cold start or brownout. Use Value: 2.6V threshold aligns with Li-ion cell discharge curve; 450ms timeout accommodates slow LDO stabilization. | Use Scenario: DIN-rail mounted programmable logic controllers operating in unregulated 24VDC industrial environments. IC Role / Device Role / Timing Role: Primary VCC monitor asserting RESET to FPGA configuration logic during input rail sag. Use Value: ±1.5% accuracy ensures consistent trip point across wide temperature swings; open-drain output interfaces directly to 3.3V FPGA reset pin. |
| Smart Home Hub Controllers | Automotive Body Control Modules (Non-AEC) |
Use Scenario: Wi-Fi/BLE-enabled home automation hubs powered by USB-C PD or wall adapters with variable output ripple. IC Role / Device Role / Timing Role: Supervisory guard for dual-core application processor boot sequence and PMIC enable sequencing. Use Value: 1µA supply current extends battery backup runtime; 20µs response prevents firmware lockup during transient dips. | Use Scenario: Cabin lighting and window control ECUs powered from vehicle battery with load-dump transients. IC Role / Device Role / Timing Role: Secondary supply monitor validating 5V rail integrity before enabling CAN transceiver and motor drivers. Use Value: 200°C/W θJA enables direct PCB mounting without heatsinking; SOT23R footprint fits tight under-hood routing constraints. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803E26DBVR | 2.6V threshold, 200ms timeout, 0.5µA ICC, SOT-23 | Lacks 450ms option; tighter 1% VTH accuracy but higher cost | Select when lower ICC and tighter tolerance outweigh longer timeout requirement |
| MAX809SEUR+T | 2.63V threshold, 140ms timeout, 10µA ICC, SOT-23 | Higher supply current limits use in energy-harvesting designs; shorter timeout may not meet boot requirements | Choose only if legacy design reuse or MAXIM ecosystem integration is mandatory |
Compared with TLV803E26DBVR and MAX809SEUR+T, the APX803L40-26SR-7 uniquely delivers 450ms reset hold time at sub-µA current draw - critical for systems with slow-start regulators or multi-stage boot sequences where extended reset assertion prevents premature firmware execution.
Availability
APX803L40-26SR-7 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart home hub controllers, and automotive body control modules requiring stable component supply across long-life product cycles.
Supply support for APX803L40-26SR-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 to AEC-Q standards.
The APX803L series belongs to Diodes' precision power management portfolio, engineered specifically for ultra-low-power supervisory functions in battery-operated and energy-sensitive embedded systems.
FAQ
What is the exact reset threshold voltage and its tolerance for APX803L40-26SR-7?
The APX803L40-26SR-7 has a factory-trimmed detection threshold of 2.6V with a guaranteed accuracy of ±1.5% over temperature (–40°C to +85°C), corresponding to a min/max range of 2.561V to 2.639V at +25°C per datasheet DS38171 Rev. 3-2.
Does APX803L40-26SR-7 require external components to function?
No. The APX803L40-26SR-7 operates autonomously with only VCC, GND, and RESET connections. No external resistors, capacitors, or timing components are needed - the 450ms reset timeout and 2.6V threshold are fully integrated and factory-configured.
What is the maximum sink current capability of the RESET pin?
The RESET pin supports a minimum sink current of 3.5mA at VOL ≤ 0.4V (tested at VCC = VTH – 0.2V), enabling direct interface with standard CMOS inputs and compatibility with 1.8V–5V pull-up voltages without level-shifting circuitry.
Can APX803L40-26SR-7 be used in automotive applications?
The APX803L40-26SR-7 is not AEC-Q100 qualified. While it operates across –40°C to +85°C and meets industrial reliability standards, Diodes Incorporated explicitly states that automotive-grade variants require separate PPAP-capable part numbers and IATF 16949-manufactured lots - this specific SOT23R variant is intended for commercial/industrial use.
APX803L40-26SR-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:
- Voltage Detector
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.6V
- 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:
- SOT23R
APX803L40-26SR-7 FAQ
1.How can I place an order for APX803L40-26SR-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803L40-26SR-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 APX803L40-26SR-7 reliable?
The price and inventory of APX803L40-26SR-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803L40-26SR-7 is usually 5 days.
3.What payment methods are accepted for APX803L40-26SR-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L40-26SR-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803L40-26SR-7?
APX803L40-26SR-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803L40-26SR-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 APX803L40-26SR-7?
For technical support, including APX803L40-26SR-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L40-26SR-7 requirements.
6.How does Aetrix verify that APX803L40-26SR-7 is sourced from the original manufacturer or authorized distributors?
All APX803L40-26SR-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 APX803L40-26SR-7 meets industry standards.
7.What is the process for return or replacement of APX803L40-26SR-7?
All APX803L40-26SR-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L40-26SR-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 APX803L40-26SR-7 part is unused and in its original packaging.
Return procedure for APX803L40-26SR-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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