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Diodes Incorporated APX803L40-13SA-7
- Part No.:
- APX803L40-13SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX803L40-13SA-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:3,072
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Product details
Overview
APX803L40-13SA-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, providing precise 4.0V threshold detection with ±1.5% accuracy, 450ms reset timeout, 1µA typical supply current, and open-drain active-low RESET output in SOT23 package-used in battery-powered IoT sensors and portable medical devices.
For engineers reviewing the APX803L40-13SA-7 datasheet, APX803L40-13SA-7 pinout, APX803L40-13SA-7 application, or APX803L40-13SA-7 equivalent, key selection criteria include fixed 4.0V detection level, guaranteed 450ms reset hold time across -40°C to +85°C, ultra-low quiescent current for energy-constrained systems, and compatibility with 3.3V/5V microprocessor power rails.
Technical Context
The APX803L40-13SA-7 implements a precision bandgap-based voltage reference with internal hysteresis (0.01×VTH) to prevent oscillation during VCC recovery, and features a temperature-stable threshold (50 ppm/°C drift) over -40°C to +85°C operating range.
Its open-drain RESET output sinks up to 20mA and requires an external pull-up resistor; the 450ms delay is factory-fixed and non-adjustable, ensuring deterministic reset timing without external RC components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Detection Threshold | 4.0V ±1.5% - precisely holds microprocessor in reset until VCC rises above 4.06V (min), critical for reliable boot sequencing. |
| Reset Timeout | 450ms (typ.) - guarantees minimum reset assertion duration to meet ARM Cortex-M and RISC-V MCU reset timing requirements. |
| Supply Current | 1.0µA (typ.), 2.5µA (max) - enables multi-year operation on coin-cell batteries in always-on monitoring applications. |
| Response Time | 20µs - detects VCC drop below threshold within 20 microseconds, preventing system corruption during fast transients. |
| Output Type | Open-drain, active-low - allows wired-OR reset bus sharing across multiple supervisors and flexible pull-up voltage selection (1.8V–5.5V). |
| Operating Voltage | 0.9V to 5.5V - supports direct connection to 1.8V, 3.3V, and 5V supply rails without level-shifting. |
| Temperature Range | -40°C to +85°C - qualified for industrial and extended-temperature embedded control environments. |
Pinout & Package
SOT23-3 package (2.9mm × 1.3mm × 1.0mm height), RoHS-compliant, lead-free, halogen-free "Green" construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground Reference | Return path for internal reference and output stage; must be low-impedance connection to system ground plane. |
| 2 (RESET) | Open-Drain Reset Output | Active-low signal asserted when VCC < 4.0V; requires external pull-up resistor (typically 10kΩ) to host rail. |
| 3 (VCC) | Supply Input | Monitored power rail input; powers internal circuitry and defines detection reference-no separate bias supply needed. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 4.0V Threshold | Factory-trimmed bandgap reference eliminates need for external resistive divider or calibration in production. |
| 450ms Reset Hold Time | Guaranteed minimum assertion period ensures full initialization of complex SoCs before release from reset. |
| 1µA Supply Current | Reduces standby power by >90% versus legacy reset ICs, extending battery life in wearable and sensor nodes. |
| No External Components | Self-contained operation-no capacitors, resistors, or trimming required-reduces BOM count and PCB area. |
| ±1.5% Threshold Accuracy | Minimizes false resets and improves margin for 3.3V systems where VCC tolerance is ±5%. |
Applications
| Smart Wearables | Industrial PLC Modules |
|---|---|
Use Scenario: Continuous heart-rate monitoring in wrist-worn health trackers powered by CR2032 coin cell. IC Role / Device Role / Timing Role: Voltage supervisor ensuring MCU remains held in reset until Li-ion battery voltage stabilizes above 4.0V after cold start. Use Value: Prevents firmware crash during brown-out by enforcing 450ms minimum reset pulse, enabling reliable BLE reconnection sequence. | Use Scenario: Power monitoring in DIN-rail mounted programmable logic controller I/O modules. IC Role / Device Role / Timing Role: Supervisory watchdog detecting 24V DC supply sag caused by motor startup surges or cable voltage drop. Use Value: 1µA quiescent current avoids loading auxiliary 5V rail; ±1.5% accuracy ensures reset triggers only at true fault condition, not nominal ripple. |
| Medical Infusion Pumps | Automotive Telematics Units |
Use Scenario: Battery-backed safety-critical infusion pump with dual 3.7V Li-ion cells in series (7.4V nominal). IC Role / Device Role / Timing Role: Monitors 5V DC-DC output feeding microcontroller and motor driver, asserting reset if voltage dips below 4.0V due to load transient. Use Value: 20µs response time captures fast drops from solenoid switching; open-drain output interfaces directly with MCU's dedicated reset pin. | Use Scenario: LTE modem module in vehicle black box with 12V automotive supply and internal 3.3V LDO. IC Role / Device Role / Timing Role: Detects dropout on 3.3V rail caused by alternator ripple or ignition noise, holding system in safe state. Use Value: 450ms timeout exceeds CAN bus error recovery window; hysteresis prevents chatter during noisy supply recovery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G33DBVR | 3.3V fixed threshold, 200ms default delay (adjustable via capacitor), 1.1µA supply current | Requires external timing capacitor; better suited for designs needing configurable delay | Select if adjustable reset timeout is required; not drop-in for 4.0V detection. |
| MAX809SEUR+T | 3.08V threshold, 140ms min delay, 12µA supply current, SOT23-3 | Higher quiescent current limits battery life; lower threshold unsuitable for 3.3V systems with tight margins | Use only where 3.08V detection is acceptable and higher ICC is tolerable. |
Compared with TPS3808G33DBVR and MAX809SEUR+T, the APX803L40-13SA-7 delivers exact 4.0V detection with zero external components and lowest ICC-making it optimal for space- and energy-constrained 3.3V/5V systems requiring deterministic, factory-set reset behavior.
Availability
APX803L40-13SA-7 is available at Aetrix Electronics and suitable for smart wearables, industrial PLC modules, and medical infusion pumps requiring stable component supply and long-term production continuity.
Supply support for APX803L40-13SA-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 for power management, signal integrity, and protection applications.
The APX803L series belongs to Diodes' µP supervisory product line, engineered specifically for ultra-low-power, high-accuracy voltage monitoring in battery-operated and industrial edge devices.
FAQ
What is the exact reset threshold voltage for APX803L40-13SA-7?
The APX803L40-13SA-7 has a factory-trimmed detection threshold of 4.0V with ±1.5% accuracy over temperature (–40°C to +85°C), meaning the actual trip point falls between 3.94V and 4.06V at +25°C and remains within ±1.5% across the full operating range.
Does APX803L40-13SA-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 (typically 4.7kΩ to 10kΩ) to the host supply rail (e.g., 3.3V or 5V) is mandatory to generate a valid logic-high level when the output is inactive.
Can APX803L40-13SA-7 monitor a 1.8V supply rail?
No-it is designed to monitor supplies ≥0.9V but its fixed 4.0V threshold makes it unsuitable for direct 1.8V rail supervision; use APX803L18-xx variants for 1.8V detection instead.
Is APX803L40-13SA-7 qualified for automotive applications?
No-this variant is not AEC-Q100 qualified; Diodes offers automotive-grade versions (e.g., APX803L40-xxSA-A) with PPAP documentation and IATF 16949 manufacturing, but APX803L40-13SA-7 is rated for industrial temperature range only.
APX803L40-13SA-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:
- 1.3V
- 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
APX803L40-13SA-7 FAQ
1.How can I place an order for APX803L40-13SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803L40-13SA-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 APX803L40-13SA-7 reliable?
The price and inventory of APX803L40-13SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803L40-13SA-7 is usually 5 days.
3.What payment methods are accepted for APX803L40-13SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L40-13SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803L40-13SA-7?
APX803L40-13SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803L40-13SA-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 APX803L40-13SA-7?
For technical support, including APX803L40-13SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L40-13SA-7 requirements.
6.How does Aetrix verify that APX803L40-13SA-7 is sourced from the original manufacturer or authorized distributors?
All APX803L40-13SA-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 APX803L40-13SA-7 meets industry standards.
7.What is the process for return or replacement of APX803L40-13SA-7?
All APX803L40-13SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L40-13SA-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 APX803L40-13SA-7 part is unused and in its original packaging.
Return procedure for APX803L40-13SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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