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Diodes Incorporated APX803L40-30SA-7
- Part No.:
- APX803L40-30SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX803L40-30SA-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,607
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Product details
Overview
APX803L40-30SA-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 provides a fixed 3.0V detection threshold with ±1.5% accuracy, 450ms reset timeout, 1µA typical supply current, and open-drain active-low RESET output in SOT23-3 package - deployed in portable instrumentation and low-power microcontroller power-up sequencing.
For engineers reviewing the APX803L40-30SA-7 datasheet, APX803L40-30SA-7 pinout, APX803L40-30SA-7 application, or APX803L40-30SA-7 equivalent, key selection criteria include threshold voltage tolerance, reset delay stability over temperature, open-drain sink capability (3.5mA @ 0.4V), and compatibility with 0.9–5.5V operating range in space-constrained designs.
Technical Context
The APX803L40-30SA-7 implements a precision bandgap-based voltage reference with hysteresis (0.01×VTH) to prevent oscillation during threshold crossing. Its internal comparator triggers an open-drain RESET signal when VCC drops below 3.0V and holds it active for 450ms after recovery.
It operates across –40°C to +85°C ambient, maintains <50 ppm/°C threshold drift, and delivers sub-20µs response time from VCC drop to RESET assertion - enabling reliable power-on reset and brownout protection without external timing components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Detection Threshold | 3.0V ±1.5% - ensures accurate power-rail monitoring for 3.3V systems with margin against noise-induced false resets |
| Reset Timeout | 450ms (typ.) - guarantees sufficient hold time for microprocessor initialization and peripheral stabilization |
| Supply Current | 1.0µA (typ.), 2.5µA (max.) - enables multi-year operation on coin-cell batteries in always-on monitoring applications |
| Output Type | Open-drain, active-low - supports wired-OR configuration and flexible pull-up voltage selection up to 5.5V |
| Response Time | ≤20µs - provides rapid fault detection critical for real-time system recovery |
| Operating Voltage | 0.9V to 5.5V - accommodates wide input range including Li-ion battery discharge profiles |
| Hysteresis | 0.01×VTH (≈30mV) - prevents chatter during slow VCC ramp-up or noisy supply conditions |
Pinout & Package
SOT23-3 package (JEDEC TO-236AB), 1.3mm × 2.9mm footprint, 1.1mm height, lead-free and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - GND | Ground Reference | Return path for internal circuitry and RESET output sink current |
| 2 - RESET | Open-Drain Output | Active-low reset signal; requires external pull-up; sinks up to 3.5mA at 0.4V |
| 3 - VCC | Supply Input | Power rail monitored and powered; supports 0.9–5.5V operation with low quiescent draw |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 3.0V threshold | Eliminates external resistor network, reducing BOM count and layout area in compact µP reset circuits |
| 450ms factory-set delay | Guarantees deterministic reset duration without capacitor tolerance or temperature drift concerns |
| ±1.5% threshold accuracy | Meets tight reset window requirements for 3.3V logic families with 10% supply tolerance |
| 1µA supply current | Enables integration into energy-harvesting and ultra-low-power IoT sensor nodes |
| No external components | Reduces design validation effort and improves long-term reliability by removing timing capacitors |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Continuous glucose monitor powered by CR2032 battery with sleep/wake cycles. IC Role / Device Role / Timing Role: Voltage supervisor asserting RESET during battery sag below 3.0V to prevent corrupted ADC readings or flash writes. Use Value: Prevents data loss and firmware corruption via guaranteed 450ms reset hold, while drawing only 1µA during 99% of operation. | Use Scenario: DIN-rail mounted remote I/O unit with isolated 3.3V logic supply. IC Role / Device Role / Timing Role: Monitors field-side 3.3V rail; asserts open-drain RESET to ARM Cortex-M4 until stable post-power-up. Use Value: Ensures deterministic boot sequence across –40°C to +70°C industrial environment with ±1.5% threshold stability. |
| Smart Home Hub Controllers | Wearable Fitness Trackers |
Use Scenario: Dual-rail hub (3.3V core, 1.8V I/O) requiring coordinated power sequencing. IC Role / Device Role / Timing Role: Supervises 3.3V domain; RESET output feeds FPGA configuration controller to gate clock enable. Use Value: Enables clean startup with 450ms delay matching FPGA configuration time, eliminating need for discrete RC timing. | Use Scenario: Optical heart-rate sensor with BLE SoC and rechargeable LiPo cell. IC Role / Device Role / Timing Role: Detects brownout during high-current LED pulse; holds RESET until battery recovers above 3.0V. Use Value: Maintains system integrity during transient load dips without adding leakage paths or board space. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G30DBVR | 3.0V threshold, 200ms default delay, 1.1µA IQ, same SOT23-6 pinout but different pin assignment | Requires PCB redesign due to 6-pin layout and different RESET polarity handling | Select if longer qualification cycle allows revalidation and higher delay tolerance is acceptable |
| MAX809SEUR+T | 3.0V threshold, 240ms delay, 10µA IQ, SOT23-3 compatible pinout | Higher supply current reduces battery life in multi-year deployments | Choose only for legacy designs where MAX809 footprint reuse is mandatory |
Compared with TPS3808G30DBVR and MAX809SEUR+T, the APX803L40-30SA-7 offers superior energy efficiency (1µA vs. ≥10µA), exact SOT23-3 pin compatibility, and a longer, factory-trimmed 450ms delay - making it optimal for new ultra-low-power designs where timing precision and board space are critical.
Availability
APX803L40-30SA-7 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, and smart home hub controllers requiring stable component supply across extended production lifecycles.
Supply support for APX803L40-30SA-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 devices for power management, signal integrity, and connectivity applications.
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 reset timeout value for APX803L40-30SA-7, and how does it vary with temperature?
The APX803L40-30SA-7 has a nominal reset timeout of 450ms at +25°C, with measured values ranging from 292ms (min) to 608ms (max) across the full –40°C to +85°C operating range. This variation is characterized and specified in the Electrical Characteristics table under tDELAY for APX803L40-XX part variants, ensuring predictable behavior in thermal cycling environments.
Can APX803L40-30SA-7 be used with a 1.8V supply rail?
No - the APX803L40-30SA-7 requires a minimum VCC of 0.9V to operate, but its 3.0V detection threshold means it cannot supervise a 1.8V rail. It is intended for 3.3V or higher systems where the monitored voltage exceeds the threshold. For 1.8V supervision, Diodes offers APX803L18-XX variants with 1.8V fixed thresholds.
Does the RESET pin require an external pull-up resistor, and what voltage can it tolerate?
Yes, the open-drain RESET pin requires an external pull-up resistor. It supports pull-up voltages up to 5.5V independent of VCC, enabling level-shifting between different supply domains - for example, pulling up to 5V while VCC is 3.3V. The output sinks up to 3.5mA with VOL ≤ 0.4V at that current.
Is APX803L40-30SA-7 qualified for automotive applications?
No - APX803L40-30SA-7 is not AEC-Q100 qualified. Diodes specifies that automotive-grade versions require explicit change control, PPAP capability, and manufacturing in IATF 16949-certified facilities. This part is rated for industrial temperature range (–40°C to +85°C) and intended for commercial and industrial applications only.
APX803L40-30SA-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:
- 3V
- 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
APX803L40-30SA-7 FAQ
1.How can I place an order for APX803L40-30SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803L40-30SA-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 APX803L40-30SA-7 reliable?
The price and inventory of APX803L40-30SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803L40-30SA-7 is usually 5 days.
3.What payment methods are accepted for APX803L40-30SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L40-30SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803L40-30SA-7?
APX803L40-30SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803L40-30SA-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 APX803L40-30SA-7?
For technical support, including APX803L40-30SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L40-30SA-7 requirements.
6.How does Aetrix verify that APX803L40-30SA-7 is sourced from the original manufacturer or authorized distributors?
All APX803L40-30SA-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 APX803L40-30SA-7 meets industry standards.
7.What is the process for return or replacement of APX803L40-30SA-7?
All APX803L40-30SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L40-30SA-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 APX803L40-30SA-7 part is unused and in its original packaging.
Return procedure for APX803L40-30SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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