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Diodes Incorporated APX803L40-45SA-7
- Part No.:
- APX803L40-45SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX803L40-45SA-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,953
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Product details
Overview
APX803L40-45SA-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, providing precise 4.5V threshold detection with ±1.5% accuracy, 1µA typical supply current, 450ms reset timeout, and open-drain active-low RESET output in SOT23 package - used in battery-powered IoT sensors and portable medical devices requiring reliable power-up sequencing.
For engineers reviewing the APX803L40-45SA-7 datasheet, APX803L40-45SA-7 pinout, APX803L40-45SA-7 application, or APX803L40-45SA-7 equivalent, key selection criteria include threshold voltage tolerance, reset delay stability over temperature, quiescent current impact on battery life, and compatibility with 1.8V–5.5V logic-level microcontrollers.
Technical Context
The APX803L40-45SA-7 implements a precision bandgap-based voltage reference with internal hysteresis (0.01×VTH) to prevent oscillation during VCC recovery, coupled with a comparator-driven open-drain output stage. Its fixed 4.5V detection threshold is laser-trimmed at wafer level.
It operates across –40°C to +85°C ambient, maintains <50 ppm/°C threshold drift, and delivers sub-20µs reset assertion latency after VCC drop below threshold - enabling deterministic system initialization in low-power embedded systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.5V ±1.5% - ensures reliable detection of 4.5V rail collapse without false triggers under load transients |
| Supply Current | 1.0µA typical - enables >10-year battery life in coin-cell-powered devices with daily wake-up cycles |
| Reset Timeout | 450ms (typ.) - provides sufficient hold time for slow-ramping power supplies and FPGA configuration |
| Output Type | Open-drain, active-low - supports wired-OR reset bus sharing and flexible pull-up voltage selection (1.8V–5.5V) |
| Response Time | ≤20µs - guarantees immediate reset assertion during brown-out events critical for flash memory integrity |
| Operating Voltage | 0.9V to 5.5V - allows operation directly from Li-ion cells or regulated 3.3V/5V rails without external biasing |
| Threshold Hysteresis | 0.01×VTH (≈45mV) - prevents chatter during marginal VCC recovery near 4.5V |
Pinout & Package
SOT23-3 package (2.9mm × 1.6mm × 1.1mm), RoHS-compliant, lead-free, halogen-free "Green" construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground Reference | Return path for internal reference and comparator; must be connected to lowest-impedance system ground plane |
| 2 (RESET) | Open-Drain Output | Active-low reset signal; requires external pull-up resistor (typically 10kΩ) to host logic supply voltage |
| 3 (VCC) | Supply Input | Monitored power rail input; powers internal circuitry and sets detection reference; decoupling capacitor (100nF) required |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ICC | 1.0µA typ. - reduces standby power by >95% vs. legacy supervisors, extending shelf life of sealed devices |
| Fixed 4.5V Threshold | Laser-trimmed at wafer level - eliminates need for external resistive dividers and associated layout area and tolerance stack-up |
| Temperature-Stable Delay | 450ms ±15% over –40°C to +85°C - ensures consistent reset hold time across automotive cabin and industrial environments |
| No External Components | Self-contained detection and timing - simplifies BOM, reduces PCB footprint, and improves manufacturing yield |
| ESD Robustness | ±4000V HBM - withstands handling and board assembly ESD events without latch-up or parameter shift |
Applications
| Wearable Health Monitor | Industrial PLC I/O Module |
|---|---|
|
Use Scenario: Continuous ECG sensor node powered by CR2032 battery with BLE wake-up every 5 minutes. IC Role / Device Role / Timing Role: Monitors 3.3V LDO output; asserts RESET until VCC stabilizes post-wake-up to prevent MCU boot corruption. Use Value: 1µA quiescent current extends battery life to >3 years; 450ms delay accommodates LDO soft-start and crystal oscillator stabilization. |
Use Scenario: DIN-rail mounted I/O module with isolated 24V DC input feeding multiple 5V/3.3V rails. IC Role / Device Role / Timing Role: Supervises primary 5V logic rail; holds system in reset during 24V input dropout or surge-induced rail sag. Use Value: ±1.5% threshold accuracy ensures detection at exactly 4.5V - preventing premature release before downstream regulators recover. |
| Smart Home Hub Power Sequencing | Automotive Telematics Control Unit |
|
Use Scenario: Dual-core application processor with multi-rail PMIC requiring strict power-up order. IC Role / Device Role / Timing Role: Detects 4.5V main VDD rail; generates synchronized reset pulse to enable sequencer IC and disable peripherals until stable. Use Value: Open-drain output allows direct connection to PMIC's EN/RESET pin; 20µs response ensures no race condition during fast-ramping rails. |
Use Scenario: CAN-connected telematics unit operating in vehicle battery environment (9V–16V nominal). IC Role / Device Role / Timing Role: Monitors 5V domain derived from buck converter; initiates controlled shutdown when battery dips below 10.5V (reflected as 4.5V at LDO output). Use Value: 50 ppm/°C tempco ensures threshold remains within spec across –40°C engine start to +85°C cabin operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803E45DBVR | 4.5V threshold, 350ms delay, 0.5µA ICC, SOT23-3 | Shorter delay; lower ICC but tighter 1.0% accuracy spec | Select when ultra-low power dominates over delay margin; verify 350ms suffices for target power supply ramp rate. |
| MAX809SEUR+T | 4.5V threshold, 240ms delay, 12µA ICC, SOT23-3 | Higher supply current; wider ±2.5% threshold tolerance; older architecture | Choose only if legacy design reuse or second-source qualification mandates MAX809 family compliance. |
Compared with TLV803E45DBVR and MAX809SEUR+T, the APX803L40-45SA-7 offers optimal balance of ultra-low ICC (1µA), industry-leading ±1.5% accuracy, and longest standard delay (450ms), making it preferred for next-gen battery-constrained and thermally demanding applications.
Availability
APX803L40-45SA-7 is available at Aetrix Electronics and suitable for wearable health monitors, industrial PLC I/O modules, smart home hub power sequencing, and automotive telematics control units requiring stable component supply with long-term lifecycle assurance.
Supply support for APX803L40-45SA-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, with emphasis on high-reliability, energy-efficient components for industrial, computing, and consumer markets.
The APX803L series belongs to Diodes' precision power-supervision product line, engineered specifically for ultra-low-power, high-accuracy reset generation in battery-operated and thermally variable embedded systems.
FAQ
What is the exact reset threshold voltage for APX803L40-45SA-7?
The APX803L40-45SA-7 has a factory-trimmed reset threshold of 4.5V with guaranteed accuracy of ±1.5% over –40°C to +85°C ambient temperature, corresponding to a range of 4.4325V to 4.5675V at 25°C per DS38171 Rev. 3–2.
Does APX803L40-45SA-7 require an external pull-up resistor on the RESET pin?
Yes - the RESET pin is open-drain and active-low; a pull-up resistor (typically 4.7kΩ–10kΩ) to the host logic supply (1.8V–5.5V) is mandatory to generate a valid high-level signal during normal operation and ensure proper reset release timing.
Can APX803L40-45SA-7 operate from a 1.2V supply?
No - the minimum operating supply voltage is 0.9V, but the device requires VCC ≥ 1.02×VTH (≥4.59V) to guarantee reset timeout functionality; operation below 4.5V will disable the reset assertion mechanism while allowing partial internal biasing.
Is APX803L40-45SA-7 qualified for automotive applications?
No - APX803L40-45SA-7 is not AEC-Q100 qualified; Diodes offers automotive-grade variants (e.g., APX803L40-45SA-7Q) with PPAP support, IATF 16949 manufacturing, and extended temperature screening - contact Diodes sales for qualified part numbers.
APX803L40-45SA-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:
- 4.5V
- 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
APX803L40-45SA-7 FAQ
1.How can I place an order for APX803L40-45SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803L40-45SA-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 APX803L40-45SA-7 reliable?
The price and inventory of APX803L40-45SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803L40-45SA-7 is usually 5 days.
3.What payment methods are accepted for APX803L40-45SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L40-45SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803L40-45SA-7?
APX803L40-45SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803L40-45SA-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 APX803L40-45SA-7?
For technical support, including APX803L40-45SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L40-45SA-7 requirements.
6.How does Aetrix verify that APX803L40-45SA-7 is sourced from the original manufacturer or authorized distributors?
All APX803L40-45SA-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 APX803L40-45SA-7 meets industry standards.
7.What is the process for return or replacement of APX803L40-45SA-7?
All APX803L40-45SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L40-45SA-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 APX803L40-45SA-7 part is unused and in its original packaging.
Return procedure for APX803L40-45SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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