My Inquiry
My Account
Diodes Incorporated APX803L20-44SA-7
- Part No.:
- APX803L20-44SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX803L20-44SA-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,965
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
APX803L20-44SA-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, providing precise 4.4V threshold detection with ±1.5% accuracy, 1µA typical supply current, and 220ms reset timeout. It delivers active-low open-drain reset signaling in battery-powered IoT sensors and portable medical devices requiring ultra-low power monitoring.
For engineers reviewing the APX803L20-44SA-7 datasheet, APX803L20-44SA-7 pinout, APX803L20-44SA-7 application, or APX803L20-44SA-7 equivalent, this page details its fixed-threshold supervision function, SOT23-3 package compatibility, reset timing behavior across temperature, and design integration requirements for reliable power-up sequencing.
Technical Context
The APX803L20-44SA-7 implements a precision bandgap-based voltage reference with hysteresis (0.01×VTH) to prevent oscillation during VCC recovery. Its internal comparator continuously monitors VCC against a factory-trimmed 4.4V threshold and asserts RESET when VCC drops below that level.
Reset assertion remains active until VCC exceeds the release threshold (VTH + hysteresis), followed by a guaranteed 220ms timeout before deassertion - a fixed delay option selected via part number suffix '20'. No external components are required for basic operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Detection Threshold | 4.4V ±1.5% at +25°C; ensures reliable µP reset initiation within specified supply tolerance |
| Supply Current | 1.0µA typical; enables multi-year operation in coin-cell–powered devices without compromising battery life |
| Reset Timeout | 220ms (min–max: 143–297ms); provides sufficient hold time for slow-ramping power rails and system stabilization |
| Response Time | ≤20µs VCC drop-to-reset; guarantees fast fault capture before digital logic corruption occurs |
| Output Type | Open-drain, active-low; supports wired-OR reset bus configurations and flexible pull-up voltage selection |
| Operating Voltage | 0.9V to 5.5V; allows use with 1.2V–3.3V logic domains and brown-out detection down to sub-1V supplies |
| Temperature Range | −40°C to +85°C ambient; validated for industrial-grade embedded control and automotive cabin electronics |
Pinout & Package
SOT23-3 package (3-pin, 1.3mm × 2.9mm × 1.1mm body, 0.95mm pitch), RoHS-compliant, lead-free, halogen-free "Green" construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal comparator and output stage; must be low-impedance connection to system ground plane |
| 2 | RESET | Open-drain active-low reset output; requires external pull-up resistor (typically 10kΩ) to host VCC or dedicated reset rail |
| 3 | VCC | Power input pin; supplies internal reference and comparator; decoupling capacitor (100nF) recommended adjacent to pin |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 4.4V threshold | Factory-trimmed, no external resistors needed - reduces BOM count and layout area in space-constrained designs |
| 220ms reset timeout | Guaranteed minimum delay ensures full power rail stabilization before processor release, eliminating boot failures |
| ±1.5% threshold accuracy | Minimizes false resets across voltage and temperature; supports tighter supply margining in low-voltage systems |
| 1µA supply current | Enables always-on supervision in energy-harvesting nodes and wearables where quiescent power dominates lifetime budget |
| Open-drain output | Allows shared reset bus with multiple supervisors or processors; compatible with 1.8V/3.3V/5V logic families via pull-up selection |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Continuous glucose monitor with coin-cell battery and BLE radio. IC Role / Device Role / Timing Role: Monitors 3.0V LDO output to assert reset if voltage sags below 4.4V during RF transmission burst. Use Value: Prevents firmware crash from undervoltage-induced memory corruption while extending battery life via 1µA quiescent draw. |
Use Scenario: DIN-rail mounted analog input module operating in factory environments. IC Role / Device Role / Timing Role: Supervises 5V system rail after cold start; holds µC in reset for 220ms until FPGA config completes. Use Value: Eliminates need for discrete RC timing network, improving long-term reliability and reducing thermal drift sensitivity. |
| Smart Home Hub Power Sequencing | Automotive Body Control Module (BCM) |
Use Scenario: Dual-rail hub (1.1V core, 3.3V I/O) powered from buck-boost converter. IC Role / Device Role / Timing Role: Detects 3.3V rail collapse and triggers coordinated shutdown of Wi-Fi SoC and Zigbee transceiver. Use Value: Enables deterministic power-down sequence without software intervention, meeting UL 62368-1 safe failure requirements. |
Use Scenario: Low-power door module with wake-on-LIN functionality. IC Role / Device Role / Timing Role: Supervises 5V LIN transceiver supply; asserts reset on ignition cycle dips below 4.4V during cranking. Use Value: Maintains AEC-Q100-compliant supervision performance across −40°C to +85°C without calibration or trimming. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803EA44DBZR | 4.4V threshold, 200ms timeout, 0.5µA supply current; same SOT23-3 footprint but TI's nano-power architecture | Lower ICC enables longer battery life in ultra-low-duty-cycle sensors; slightly reduced temp range (−40°C to +125°C) | Select when <0.7µA quiescent current is mandatory and higher max junction temperature is acceptable |
| MAX809SEUR+T | 4.4V threshold, 240ms timeout, 12µA supply current; same pinout but higher ICC and older process node | Higher supply current limits use in multi-year battery applications; wider production availability for legacy designs | Select only for cost-sensitive industrial controls where 12µA ICC is acceptable and long-term obsolescence risk is mitigated |
Compared with TLV803EA44DBZR and MAX809SEUR+T, the APX803L20-44SA-7 delivers optimal balance of ultra-low ICC (1µA), tight threshold accuracy (±1.5%), and industrial temperature support - making it preferred for next-generation portable and automotive-adjacent electronics where power and precision are co-constrained.
Availability
APX803L20-44SA-7 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, and smart home hub power sequencing requiring stable component supply across extended product lifecycles.
Supply support for APX803L20-44SA-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 manufacturer of high-performance discrete semiconductors and analog ICs, serving automotive, industrial, computing, and consumer markets with focus on power efficiency and reliability.
The APX803L series belongs to Diodes' precision voltage supervisor product line, engineered specifically for ultra-low-power, high-accuracy power monitoring in battery-critical and thermally demanding embedded systems.
FAQ
What is the exact reset threshold voltage and tolerance for APX803L20-44SA-7?
The APX803L20-44SA-7 has a nominal reset threshold of 4.4V with ±1.5% accuracy over temperature (−40°C to +85°C). This is factory-trimmed and specified in the Electrical Characteristics table of DS38171 Rev. 3–2, ensuring consistent detection without external calibration.
Can APX803L20-44SA-7 drive a 10kΩ pull-up resistor to 3.3V?
Yes - the open-drain RESET output can sink ≥3.5mA at VOL ≤0.4V (per datasheet test condition), supporting standard 10kΩ pull-ups to 3.3V (I = 330µA) with ample margin. Output voltage remains below 0.4V under full load, ensuring clean logic-low assertion.
Does APX803L20-44SA-7 require an external capacitor for stability?
No external capacitor is required for basic supervision. A 100nF ceramic decoupling capacitor on VCC is recommended per the Typical Applications Circuit, but no timing or filtering capacitor is needed - the 220ms delay is fully internal and factory-set.
Is APX803L20-44SA-7 qualified for automotive applications?
The APX803L20-44SA-7 is not AEC-Q100 qualified. Diodes offers automotive-grade variants (e.g., APX803L20-44SA-7Q) with PPAP capability and IATF 16949 manufacturing; standard SA-7 parts are rated for industrial temperature range (−40°C to +85°C) and intended for non-safety-critical automotive-adjacent systems.
APX803L20-44SA-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:
- 4.4V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 143ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
APX803L20-44SA-7 FAQ
1.How can I place an order for APX803L20-44SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803L20-44SA-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 APX803L20-44SA-7 reliable?
The price and inventory of APX803L20-44SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803L20-44SA-7 is usually 5 days.
3.What payment methods are accepted for APX803L20-44SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L20-44SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803L20-44SA-7?
APX803L20-44SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803L20-44SA-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 APX803L20-44SA-7?
For technical support, including APX803L20-44SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L20-44SA-7 requirements.
6.How does Aetrix verify that APX803L20-44SA-7 is sourced from the original manufacturer or authorized distributors?
All APX803L20-44SA-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 APX803L20-44SA-7 meets industry standards.
7.What is the process for return or replacement of APX803L20-44SA-7?
All APX803L20-44SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L20-44SA-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 APX803L20-44SA-7 part is unused and in its original packaging.
Return procedure for APX803L20-44SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
APX803L20-44SA-7 Tags
-
MIC826SYMT-TR
Microchip Technology
-
APX803S-31SA-7
Diodes Incorporated
-
APX803L20-29SA-7
Diodes Incorporated
-
TPS3828-33DBVR
Texas Instruments
-
V6340RSP3B+
EM Microelectronic
-
EM6325CXSP5B-2.9+
EM Microelectronic
-
MCP120T-300I/TT
Microchip Technology
-
MCP130T-315I/TT
Microchip Technology
-
MCP120T-475I/TT
Microchip Technology
-
MCP111T-300E/TT
Microchip Technology
-
MCP120T-315I/TT
Microchip Technology
-
MCP809T-315I/TT
Microchip Technology
Tech Hub
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
