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Diodes Incorporated APX803L40-17SA-7
- Part No.:
- APX803L40-17SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX803L40-17SA-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,928
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Product details
Overview
APX803L40-17SA-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, monitoring VCC supply rails in battery-powered and embedded digital systems. It features a fixed 1.7V detection threshold (±1.5% accuracy), 450ms reset timeout, 1µA typical supply current, and open-drain active-low RESET output in SOT23-3 package - deployed in portable medical monitors requiring reliable brownout protection.
For engineers reviewing the APX803L40-17SA-7 datasheet, APX803L40-17SA-7 pinout, APX803L40-17SA-7 application, or APX803L40-17SA-7 equivalent, key selection criteria include threshold voltage tolerance, reset delay stability over temperature, low-quiescent-current impact on battery life, and compatibility with 1.8V/3.3V logic interface levels.
Technical Context
The APX803L40-17SA-7 implements a precision bandgap-based voltage reference with internal hysteresis (0.01×VTH) to prevent oscillation during threshold crossing. Its comparator drives an open-drain output stage capable of sinking ≥3.5mA at 0.4V max VOL, enabling direct connection to µP reset inputs without external pull-up constraints.
Reset assertion occurs within 20µs after VCC drops below 1.7V, and release requires VCC to exceed 1.7V + hysteresis before deassertion. The 450ms timeout (APX803L40 variant) is factory-programmed and stable across –40°C to +85°C operating range, with <±50 ppm/°C threshold drift.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Detection Threshold | 1.7V ±1.5% - ensures reliable reset initiation for 1.8V I/O domain power rails |
| Supply Current | 1.0µA typical - minimizes battery drain in always-on monitoring applications |
| Reset Timeout | 450ms (typ.) - provides sufficient hold time for full µP initialization sequence |
| Output Type | Open-drain, active-low - supports wired-OR reset bus and flexible pull-up voltage selection |
| Response Time | 20µs max - guarantees fast fault detection before system state corruption |
| Operating Voltage | 0.9V to 5.5V - enables use with sub-1V logic supplies and legacy 5V systems |
| Threshold Hysteresis | 0.01×VTH (≈17mV) - prevents chatter during slow-rising/falling VCC transitions |
Pinout & Package
SOT23-3 package (JEDEC TO-236AB), 1.3mm × 2.9mm footprint, 1.45mm height, lead-free and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground Reference | Return path for internal bias and output sink current; must be low-impedance to avoid false resets |
| 2 (VCC) | Supply Input | Power rail under supervision; also powers internal circuitry - no external decoupling required |
| 3 (RESET) | Open-Drain Output | Active-low reset signal; requires external pull-up to host logic voltage (e.g., 1.8V/3.3V) |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 1.0µA typ. - extends shelf life and runtime in coin-cell–powered IoT sensors |
| Factory-trimmed threshold | 1.7V ±1.5% - eliminates need for external resistor dividers or calibration |
| Temperature-stable delay | 450ms ±10% over –40°C to +85°C - ensures consistent reset timing across environmental conditions |
| No external components | Self-contained detection and timing - reduces BOM count and PCB area vs. discrete RC solutions |
| Robust ESD rating | ±4000V HBM - withstands handling and board-level electrostatic discharge in manufacturing |
Applications
| Portable Medical Monitors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Continuous glucose monitor with BLE transmission powered by CR2032 battery. IC Role / Device Role / Timing Role: Supervises 3.3V LDO output to trigger hard reset if battery sags below 2.8V during RF burst. Use Value: 1µA supply current preserves >12-month shelf life; 450ms timeout ensures complete BLE stack reinitialization. |
Use Scenario: DIN-rail mounted analog input module operating in factory ambient (–25°C to +70°C). IC Role / Device Role / Timing Role: Monitors isolated 5V DC-DC output feeding FPGA configuration memory. Use Value: ±1.5% threshold accuracy prevents spurious resets during line transients; hysteresis avoids noise-induced toggling. |
| Smart Home Hub Controllers | Automotive Body Control Modules |
Use Scenario: Wi-Fi–enabled thermostat with dual-supply (1.8V MCU core, 3.3V peripherals). IC Role / Device Role / Timing Role: Detects 1.8V rail collapse and asserts reset to both domains via shared reset net. Use Value: Open-drain output allows level-shifting between domains; 20µs response prevents register corruption. |
Use Scenario: Door module with LIN transceiver and EEPROM, powered from vehicle battery (9V–16V). IC Role / Device Role / Timing Role: Supervises 3.3V regulator output during cold-crank (6.5V min battery). Use Value: 0.9V minimum operating voltage ensures function down to deep brownout; ±50 ppm/°C drift maintains accuracy across engine bay temps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803E17DBVR | 1.7V threshold, 200ms timeout, 0.5µA IQ, SOT23-3 | Lacks hysteresis specification; tighter IQ but shorter timeout limits use in complex boot sequences | Select when ultra-low power dominates over reset duration requirements |
| MAX809SEUR+T | 1.68V threshold, 240ms timeout, 12µA IQ, SOT23-3 | Higher supply current; wider threshold tolerance (±2.5%); no tempco spec | Choose only if legacy MAX809 footprint compatibility is mandatory and higher IQ is acceptable |
Compared with TLV803E17DBVR and MAX809SEUR+T, the APX803L40-17SA-7 delivers superior thermal stability (±50 ppm/°C), guaranteed hysteresis, and optimal balance of low IQ (1µA) and long timeout (450ms) for robust firmware recovery in resource-constrained edge devices.
Availability
APX803L40-17SA-7 is available at Aetrix Electronics and suitable for portable medical monitors, industrial PLC I/O modules, smart home hub controllers, and automotive body control modules requiring stable component supply and long-term production continuity.
Supply support for APX803L40-17SA-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 design centers in Asia, Europe, and the US, serving industrial, computing, consumer, and automotive markets.
The APX803L series belongs to Diodes' precision power management portfolio, engineered specifically for ultra-low-power, high-accuracy voltage supervision in battery-sensitive and thermally demanding embedded applications.
FAQ
What is the exact reset threshold voltage for APX803L40-17SA-7?
The APX803L40-17SA-7 has a factory-set detection threshold of 1.7V with ±1.5% accuracy at +25°C, confirmed in Electrical Characteristics table (VTH parameter). This value remains stable across temperature with a maximum drift of ±50 ppm/°C from –40°C to +85°C, ensuring consistent operation in varying environments.
Can APX803L40-17SA-7 drive a 10kΩ pull-up to 3.3V?
Yes - the open-drain RESET output can sink ≥3.5mA at VOL ≤ 0.4V (per datasheet test condition), allowing reliable low-state assertion with a 10kΩ pull-up to 3.3V (I = 330µA). This meets standard µP reset input leakage and voltage thresholds while maintaining noise margin.
Is there a version with adjustable threshold or different delay?
No - the APX803L series uses internally trimmed, fixed thresholds (1.2V–5.0V in 0.1V steps) and factory-set delays (0/55/220/450ms). For programmable alternatives, Diodes offers the APX811 series with external resistor-adjustable threshold and delay, but those require additional components and larger footprints.
Does APX803L40-17SA-7 meet automotive qualification standards?
The APX803L40-17SA-7 is not AEC-Q100 qualified. Diodes offers automotive-grade variants (e.g., APX803Lxx-xxSA-A) with PPAP capability, manufactured in IATF 16949 facilities - these carry distinct part numbers and packaging markings. This part is intended for industrial and consumer applications.
APX803L40-17SA-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:
- 1.7V
- 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
APX803L40-17SA-7 FAQ
1.How can I place an order for APX803L40-17SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803L40-17SA-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 APX803L40-17SA-7 reliable?
The price and inventory of APX803L40-17SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803L40-17SA-7 is usually 5 days.
3.What payment methods are accepted for APX803L40-17SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L40-17SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803L40-17SA-7?
APX803L40-17SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803L40-17SA-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 APX803L40-17SA-7?
For technical support, including APX803L40-17SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L40-17SA-7 requirements.
6.How does Aetrix verify that APX803L40-17SA-7 is sourced from the original manufacturer or authorized distributors?
All APX803L40-17SA-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 APX803L40-17SA-7 meets industry standards.
7.What is the process for return or replacement of APX803L40-17SA-7?
All APX803L40-17SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L40-17SA-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 APX803L40-17SA-7 part is unused and in its original packaging.
Return procedure for APX803L40-17SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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