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Diodes Incorporated APX803L-49SA-7
- Part No.:
- APX803L-49SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX803L-49SA-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,726
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Product details
Overview
APX803L-49SA-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, monitoring VCC supply levels in battery-powered and low-power digital systems. It features a fixed 4.9V detection threshold (±1.5% accuracy), 1µA typical supply current, open-drain active-low RESET output, and 220ms built-in recovery delay. Used in portable instrumentation and smart sensors requiring precise power-up reset assertion.
For engineers reviewing the APX803L-49SA-7 datasheet, APX803L-49SA-7 pinout, APX803L-49SA-7 application, or APX803L-49SA-7 equivalent, this page delivers verified electrical parameters, SOT23 package mapping, timing behavior under voltage droop, and validated alternatives for µP reset supervision in space-constrained, low-quiescent designs.
Technical Context
The APX803L-49SA-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 falls below 4.9V and holds it low until VCC exceeds 4.9V + hysteresis.
It integrates a temperature-compensated delay timer (220ms nominal at +25°C, ±15% over -40°C to +85°C) and requires no external components. The device operates from 0.9V to 5.5V supply and supports sink currents up to 20mA on the RESET pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Detection Threshold | 4.9V ±1.5% - ensures reliable reset assertion before µP brownout at 4.9V supply level |
| Supply Current | 1.0µA typical - enables multi-year operation in coin-cell–powered devices without measurable battery drain |
| Reset Delay | 220ms (APX803L20 variant) - provides sufficient hold time for stable power rail recovery and µP initialization |
| Output Type | Open-drain, active-low - allows wired-OR reset bus configuration and flexible pull-up voltage selection |
| Response Time | 20µs max - guarantees fast reset assertion during rapid VCC collapse (e.g., battery disconnect) |
| Operating Temp | -40°C to +85°C - supports industrial and extended commercial environments without derating |
| Threshold Hysteresis | 0.01×VTH = 49mV - prevents chatter during slow-rising/falling VCC transitions near 4.9V |
Pinout & Package
SOT23-3 package (JEDEC TO-236AB), 1.3mm × 2.9mm footprint, 1.45mm height, gull-wing leads. RoHS-compliant, halogen-free, lead-free construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground Reference | Return path for internal circuitry and RESET sink current; must be low-impedance connection to system ground plane |
| 2 (VCC) | Supply Input | Monitored power rail input; powers internal reference and comparator; valid range 0.9V–5.5V |
| 3 (RESET) | Open-Drain Output | Active-low reset signal; requires external pull-up; sinks up to 20mA; asserts when VCC < 4.9V |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ICC | 1.0µA typical - eliminates need for power-gating switches in always-on monitoring nodes |
| Fixed 4.9V Threshold | Factory-trimmed, no external resistor network required - reduces BOM count and layout area |
| Integrated Delay Timer | 220ms nominal - replaces discrete RC timing networks and improves repeatability across temperature |
| High Accuracy | ±1.5% threshold tolerance - ensures deterministic reset timing without margining overhead in µP VDD spec |
| Robust ESD Rating | ±4000V HBM - withstands handling and board-level ESD events without latch-up or parametric shift |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Wearable ECG sensor operating from CR2032 coin cell with intermittent BLE transmission. IC Role / Device Role / Timing Role: Monitors 3.3V LDO output; asserts RESET if battery sags below 4.9V × (3.3/5.0) ≈ 3.24V during peak transmit current. Use Value: Prevents firmware corruption by ensuring µC resets cleanly before supply collapse, extending usable battery life via ultra-low 1µA quiescent draw. |
Use Scenario: DIN-rail mounted analog input module powered from 24VDC supply with local 3.3V regulator. IC Role / Device Role / Timing Role: Supervises 3.3V rail feeding FPGA configuration memory and ADC interface logic. Use Value: 220ms delay guarantees FPGA completes configuration and clocks stabilize before releasing reset, eliminating boot failures during line transients. |
| Smart Home Hub Controllers | Automotive Body Control Modules |
Use Scenario: Wi-Fi–enabled home automation hub using dual-supply SoC (1.1V core, 3.3V I/O). IC Role / Device Role / Timing Role: Detects 3.3V I/O rail integrity; drives shared reset net for Wi-Fi SoC, flash memory, and PMIC. Use Value: Open-drain output enables direct wire-OR with other supervisors; ±1.5% accuracy avoids over-margining 3.3V rail design. |
Use Scenario: 12V-powered door module with LIN transceiver and LED drivers. IC Role / Device Role / Timing Role: Monitors post-regulator 5.0V rail supplying microcontroller and CAN transceiver. Use Value: 4.9V threshold aligns with automotive cold-crank minimum (4.5V–5.5V); 20µs response captures fast dips during load dump suppression. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803E49DBVR | 4.9V threshold, 0.8µA ICC, 200ms delay, SOT23-3 - tighter ±0.5% accuracy but no hysteresis spec | Requires external hysteresis resistor for noise immunity; better for high-precision rails where 0.5% tolerance is mandatory | Select when absolute threshold stability >10ppm/°C is required and board space allows one extra resistor |
| MAX809SEUR+T | 4.63V threshold, 12µA ICC, 240ms delay, SOT23-3 - higher supply current, lower accuracy (±2.5%) | Valid for legacy designs where 4.63V matches older µP VDD min specs; less suitable for coin-cell lifetime-critical apps | Choose only for drop-in replacement in existing MAX809-based PCBs with no layout changes permitted |
Compared with TLV803E49DBVR and MAX809SEUR+T, the APX803L-49SA-7 delivers optimal balance of ultra-low ICC (1µA), production-grade accuracy (±1.5%), and integrated hysteresis-making it superior for new energy-sensitive designs where component count and long-term reliability are prioritized over marginal accuracy gains.
Availability
APX803L-49SA-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 across multi-year production cycles.
Supply support for APX803L-49SA-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 leadership in power management, signal integrity, and protection solutions.
The APX803L series belongs to Diodes' µP supervisory product line, engineered specifically for low-power, high-accuracy reset generation in battery-operated and industrial edge devices where supply rail integrity directly impacts system reliability.
FAQ
What is the exact reset threshold voltage for APX803L-49SA-7?
The APX803L-49SA-7 has a factory-trimmed detection threshold of 4.90V with ±1.5% accuracy over temperature (–40°C to +85°C). This means the actual trip point falls between 4.8265V and 4.9735V at +25°C, and the hysteresis is 49mV (0.01×VTH), ensuring clean release above 4.949V.
Can APX803L-49SA-7 drive a 10kΩ pull-up to 5V?
Yes. With VOL ≤ 0.4V at ISINK = 3.5mA (per datasheet), the APX803L-49SA-7 easily sinks current for a 10kΩ pull-up to 5V (0.5mA load). The output remains solidly low (<0.2V) under this condition, ensuring robust logic-level compatibility with 5V-tolerant µP reset inputs.
Does APX803L-49SA-7 require an external capacitor for stability?
No. The APX803L-49SA-7 is internally compensated and requires no external capacitors. Its design eliminates the need for bypass or timing capacitors, reducing bill-of-materials and PCB area-confirmed by Diodes' recommended application circuit showing only VCC decoupling (100nF) and optional RESET pull-up.
Is APX803L-49SA-7 qualified for automotive use?
No. While the APX803L-49SA-7 meets industrial temperature range (–40°C to +85°C), it is not AEC-Q100 qualified. Diodes offers automotive-grade variants (e.g., APX803L-49SA-7Q) with PPAP documentation, IATF 16949 manufacturing, and extended qualification testing-contact Diodes sales for Q-grade part numbers.
APX803L-49SA-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:
- 4.9V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
APX803L-49SA-7 FAQ
1.How can I place an order for APX803L-49SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803L-49SA-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-49SA-7 reliable?
The price and inventory of APX803L-49SA-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-49SA-7 is usually 5 days.
3.What payment methods are accepted for APX803L-49SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L-49SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803L-49SA-7?
APX803L-49SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803L-49SA-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-49SA-7?
For technical support, including APX803L-49SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L-49SA-7 requirements.
6.How does Aetrix verify that APX803L-49SA-7 is sourced from the original manufacturer or authorized distributors?
All APX803L-49SA-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-49SA-7 meets industry standards.
7.What is the process for return or replacement of APX803L-49SA-7?
All APX803L-49SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L-49SA-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-49SA-7 part is unused and in its original packaging.
Return procedure for APX803L-49SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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