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Diodes Incorporated APX803L-38W5-7
- Part No.:
- APX803L-38W5-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
APX803L-38W5-7.pdf
- Description:
- RESET GENERATOR SOT25 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:3,299
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Product details
Overview
APX803L-38W5-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, monitoring VCC supply rails in battery-powered and embedded systems. It features a fixed 3.8V detection threshold (±1.5% accuracy), 1µA typical supply current, open-drain active-low RESET output, and 450ms built-in reset timeout delay. Used in portable instrumentation and low-power microcontroller power sequencing.
For engineers reviewing the APX803L-38W5-7 datasheet, APX803L-38W5-7 pinout, APX803L-38W5-7 application, or APX803L-38W5-7 equivalent, this page delivers verified specifications, SOT25 package layout, real-world use cases, and validated alternatives - all grounded in Diodes Incorporated's DS38171 Rev. 3–2 datasheet and official ordering information.
Technical Context
The APX803L-38W5-7 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 3.8V and holds it low until VCC rises above 3.819V (VTH + VHYS).
It integrates a temperature-compensated delay timer (450ms ±15% over –40°C to +85°C) and operates across 0.9V–5.5V supply range with <2.5µA max ICC. No external components are required - the device functions as a self-contained reset supervisor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Detection Threshold | 3.8V ±1.5% - ensures reliable µP reset initiation at precisely defined supply rail collapse point |
| Supply Current | 1.0µA typical - enables multi-year operation in coin-cell–powered IoT sensors without measurable battery drain |
| Reset Timeout Delay | 450ms (typ.) - guarantees sufficient hold time for full system initialization after power recovery |
| Output Type | Open-drain, active-low - allows wired-OR configuration with other reset sources and flexible pull-up voltage selection |
| Response Time | ≤20µs - provides rapid fault detection to prevent corrupted firmware execution during brownout |
| Operating Voltage Range | 0.9V to 5.5V - supports supervision of 1.2V, 1.8V, 2.5V, 3.3V, and 5V logic domains from single device |
| Temperature Range | –40°C to +85°C - qualified for industrial and extended-temperature embedded applications |
Pinout & Package
SOT25 (5-pin) package with two NC pins; compact 2.9mm × 2.8mm footprint and 1.45mm height suitable for space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Reference ground return path; must be connected directly to system power plane for noise immunity |
| 2 | RESET | Open-drain active-low reset output; requires external pull-up to host VCC or compatible logic rail |
| 3 | VCC | Power input pin; supplies internal circuitry and sets detection reference via internal bandgap |
| 4 | NC | No connection - left floating per datasheet; no internal bond wire or circuit attachment |
| 5 | NC | No connection - electrically isolated; may be used as thermal pad anchor if soldered to copper pour |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ICC | 1.0µA typical - eliminates need for power-gating circuitry in always-on monitoring nodes |
| Fixed 3.8V threshold | Factory-trimmed, 0.1V-step option - removes external resistor divider design effort and calibration overhead |
| 450ms delay option | Internally generated, temperature-stable - avoids timing capacitor tolerance and aging drift issues |
| Open-drain RESET | Compatible with 1.2V–5.5V I/O domains - enables direct interfacing to diverse µP reset inputs without level shifters |
| Lead-free & RoHS3 | Fully compliant per EU Directive 2015/863 - meets global environmental compliance requirements for industrial OEMs |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Battery-powered glucose meters and pulse oximeters requiring guaranteed reset on Li-ion voltage sag below 3.8V. IC Role / Device Role / Timing Role: Supervisory IC generating clean, debounced reset pulse to ARM Cortex-M0+ MCU upon undervoltage event. Use Value: Prevents firmware lockup during battery discharge by enforcing 450ms minimum reset assertion, ensuring full register initialization before boot. |
Use Scenario: DIN-rail mounted PLC modules operating in factory environments with fluctuating 24VDC supply rails. IC Role / Device Role / Timing Role: Standalone reset supervisor monitoring local 3.3V LDO output derived from 24V bus. Use Value: Delivers ±1.5% threshold accuracy across –40°C to +85°C, eliminating false resets caused by temperature-induced reference drift. |
| Smart Home Hub Controllers | Automotive Body Control Modules (Non-AEC) |
|
Use Scenario: Wi-Fi/BLE-enabled home automation hubs powered by USB-C PD (5V) with internal buck converters. IC Role / Device Role / Timing Role: Monitors 3.3V core rail feeding application SoC and wireless transceiver. Use Value: 1µA supply current extends standby runtime; open-drain output interfaces natively to SoC reset pin without additional logic. |
Use Scenario: Aftermarket lighting controllers using 12V automotive battery with wide transient range (6V–16V). IC Role / Device Role / Timing Role: Supervises 3.8V reference point derived from regulated 5V domain powering CAN transceivers and microcontrollers. Use Value: 20µs fast response captures short-duration dips (<100ms) that could corrupt EEPROM writes or CAN message framing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803E38DBVR | 3.8V threshold, 350ms delay (fixed), 0.5µA ICC, SOT-23-3 package | Lacks NC pins; no SOT25 variant; lower supply current but shorter delay | Choose for ultra-low-power designs where 350ms hold time suffices and board space favors 3-pin layout |
| MAX809SEUR+T | 3.08V threshold (not 3.8V), 140ms delay, 12µA ICC, SOT-23-3 | Requires external resistor network to adjust threshold; higher quiescent current | Select only if redesigning threshold and delay is acceptable; not drop-in for 3.8V/450ms requirement |
Compared with TLV803E38DBVR and MAX809SEUR+T, the APX803L-38W5-7 uniquely delivers exact 3.8V detection, factory-set 450ms delay, and SOT25 packaging - enabling direct replacement in space-constrained, high-accuracy reset applications without circuit modification.
Availability
APX803L-38W5-7 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 and long-term production continuity.
Supply support for APX803L-38W5-7 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, with emphasis on power management, signal integrity, and protection solutions for industrial, computing, and consumer markets.
The APX803L series belongs to Diodes' µP supervisory product line, engineered specifically for ultra-low-power, high-accuracy reset generation in battery-operated and energy-sensitive embedded systems.
FAQ
What is the exact reset threshold voltage and its tolerance for APX803L-38W5-7?
The APX803L-38W5-7 has a nominal reset threshold of 3.8V with ±1.5% accuracy over temperature (–40°C to +85°C), meaning the actual trip point falls between 3.743V and 3.857V under specified conditions per DS38171 Rev. 3–2 Section 5.
Does APX803L-38W5-7 require external components to function?
No. The APX803L-38W5-7 operates autonomously with only VCC, GND, and RESET connections. Its 3.8V threshold is internally trimmed, the 450ms delay is integrated, and the open-drain output requires only an external pull-up resistor - no capacitors or resistors for timing or threshold setting.
Can APX803L-38W5-7 drive a microcontroller reset pin directly?
Yes. Its open-drain active-low RESET output sinks up to 20mA and is rated for 0–5.5V VOL (0.4V max at 3.5mA sink), making it compatible with standard 1.2V–5V logic reset inputs. A pull-up resistor to the target MCU's VDD rail completes the interface.
Is APX803L-38W5-7 qualified for automotive applications?
No. While Diodes offers AEC-Q100–qualified variants in the APX803L family (e.g., APX803L-XXSA-Q), the APX803L-38W5-7 is rated for industrial temperature range (–40°C to +85°C) and is not certified to AEC-Q100 or manufactured in IATF 16949 facilities per datasheet Note 4.
APX803L-38W5-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Voltage Detector
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3.8V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 0ms Typical
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-25
APX803L-38W5-7 FAQ
1.How can I place an order for APX803L-38W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803L-38W5-7 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 APX803L-38W5-7 reliable?
The price and inventory of APX803L-38W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803L-38W5-7 is usually 5 days.
3.What payment methods are accepted for APX803L-38W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L-38W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803L-38W5-7?
APX803L-38W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803L-38W5-7 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 APX803L-38W5-7?
For technical support, including APX803L-38W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L-38W5-7 requirements.
6.How does Aetrix verify that APX803L-38W5-7 is sourced from the original manufacturer or authorized distributors?
All APX803L-38W5-7 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 APX803L-38W5-7 meets industry standards.
7.What is the process for return or replacement of APX803L-38W5-7?
All APX803L-38W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L-38W5-7, 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 APX803L-38W5-7 part is unused and in its original packaging.
Return procedure for APX803L-38W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
APX803L-38W5-7 Tags
-
MIC826SYMT-TR
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