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Diodes Incorporated APX803L20-19SA-7
- Part No.:
- APX803L20-19SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX803L20-19SA-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:1,112
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Product details
Overview
APX803L20-19SA-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, providing precise 2.0V threshold detection with ±1.5% accuracy, 220ms reset timeout, open-drain active-low RESET output, and 1µA typical supply current. It monitors VCC in battery-powered embedded systems such as portable medical devices, IoT edge sensors, and low-power microcontroller modules.
For engineers reviewing the APX803L20-19SA-7 datasheet, APX803L20-19SA-7 pinout, APX803L20-19SA-7 application, or APX803L20-19SA-7 equivalent, this device delivers verified reset timing stability across -40°C to +85°C, minimal power burden on supply rails, and direct compatibility with SOT23 footprint layouts requiring no external components.
Technical Context
The APX803L20-19SA-7 implements a fixed-threshold voltage detector with internal 2.0V reference (±1.5% at +25°C) and built-in hysteresis of 0.01×VTH. Its reset assertion occurs within 20µs when VCC drops below the falling threshold, and release requires VCC to exceed the rising threshold (VTH_H = VTH_L + VHYS).
It features factory-programmed 220ms reset timeout (typ. 220ms, min 143ms, max 297ms over temperature), operates from 0.9V to 5.5V supply, and maintains 1µA typical ICC across -40°C to +85°C ambient range-enabling reliable supervision in energy-constrained applications without compromising system efficiency.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.0V ±1.5% at +25°C - ensures accurate brown-out detection for 2.0V logic or core supply monitoring |
| Supply Current | 1.0µA (typ.), 2.5µA (max) - enables multi-year operation on coin-cell batteries without measurable drain |
| Reset Timeout | 220ms (typ.), 143–297ms range - provides sufficient hold time for µP initialization and peripheral stabilization |
| Output Type | Open-drain, active-low - allows wired-OR reset bus configuration and flexible pull-up voltage selection |
| Response Time | ≤20µs VCC drop-to-reset assertion - guarantees fast fault capture before µP state corruption |
| Operating Temp | -40°C to +85°C - supports industrial and extended-temperature embedded deployments |
| Supply Range | 0.9V to 5.5V - accommodates single-cell Li-ion, 1.8V/3.3V/5V rails, and post-LDO outputs |
Pinout & Package
SOT23-3 package (JEDEC TO-236AB), 1.3mm × 2.9mm footprint, 1.45mm height, lead-free and RoHS-compliant.
| 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 to compatible logic rail (e.g., VCC or I/O domain) |
| 3 | VCC | Power input pin; supplies internal bandgap reference and comparator; decoupling capacitor (100nF) recommended adjacent to pin |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Integrated reference, comparator, and delay circuit eliminate need for RC networks or additional ICs |
| High threshold accuracy | ±1.5% tolerance ensures deterministic reset behavior across production lots and temperature |
| Ultra-low quiescent current | 1µA typical ICC enables >10-year battery life in always-on sensor nodes with 220ms timeout |
| Factory-set 220ms timeout | Eliminates timing resistor variability and PCB space; specified from -40°C to +85°C |
| Robust ESD protection | ±4000V HBM rating protects against handling damage during assembly and field service |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Continuous glucose monitor with BLE transmission powered by CR2032 battery. IC Role / Device Role / Timing Role: Voltage supervisor asserting RESET until 2.0V rail stabilizes after cold start or battery recovery. Use Value: Prevents firmware execution under undervoltage, avoiding corrupted EEPROM writes and false alarm triggers. |
Use Scenario: DIN-rail mounted digital input module operating from 24VDC supply with local 3.3V LDO. IC Role / Device Role / Timing Role: Monitors 3.3V logic rail to generate clean, debounced reset pulse during power-up or brownout events. Use Value: Ensures deterministic µC boot sequence and eliminates spurious I/O state transitions during supply transients. |
| Smart Home Edge Nodes | Automotive Body Control Units |
Use Scenario: Battery-backed Zigbee thermostat with wake-on-event functionality. IC Role / Device Role / Timing Role: Supervises 1.8V MCU core supply; asserts 220ms RESET to guarantee full register initialization after wake. Use Value: Eliminates need for software-based watchdog timeout tuning and reduces firmware validation scope. |
Use Scenario: Door module with LIN interface and local 5V regulator feeding 3.3V logic. IC Role / Device Role / Timing Role: Detects 2.0V threshold on 3.3V rail to initiate controlled shutdown sequence upon battery sag. Use Value: Meets ISO 16750-2 transient immunity requirements for reset assertion during load dump recovery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| APX803L20-29SA-7 | Same 2.0V threshold and 220ms timeout, but uses SOT23-3R (reversed pinout: Pin 1=GND, Pin 2=VCC, Pin 3=RESET) | Requires PCB layout revision due to swapped VCC/GND pins; not drop-in compatible | Select only if redesigning board for improved thermal performance (SOT23R has lower θJA than standard SOT23) |
| TLV803E20DBZR | 2.0V threshold, 200ms timeout (±30%), 0.5µA ICC, but requires external pull-up and lacks factory hysteresis calibration | Higher design overhead for timing validation and noise immunity tuning; less suitable for high-reliability medical use | Prefer for cost-sensitive consumer applications where ±3% threshold tolerance and manual timing adjustment are acceptable |
Compared with APX803L20-19SA-7, the APX803L20-29SA-7 offers identical electrical performance but demands mechanical rework, while TLV803E20DBZR trades guaranteed timing accuracy and integrated hysteresis for lower base cost-making the APX803L20-19SA-7 optimal for designs prioritizing production consistency and zero-component supervision.
Availability
APX803L20-19SA-7 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart home edge nodes, and automotive body control units requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for APX803L20-19SA-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 solutions, with manufacturing certified to IATF 16949 and quality systems aligned to AEC-Q200 for automotive-grade reliability.
The APX803L series was developed specifically for ultra-low-power microprocessor supervision in battery-critical and thermally constrained environments, emphasizing precision threshold stability, minimal ICC, and zero-external-component integration.
FAQ
What is the exact reset timeout value for APX803L20-19SA-7?
The APX803L20-19SA-7 features a factory-trimmed reset timeout of 220ms (typical), with guaranteed minimum 143ms and maximum 297ms across -40°C to +85°C ambient temperature per DS38171 Rev. 3-2, Table 1. This value is fixed internally and requires no external components.
Can APX803L20-19SA-7 operate from a 1.2V supply?
No. The APX803L20-19SA-7 requires a minimum VCC of 0.9V to function, but its internal circuitry-including the 2.0V reference generator-only achieves specified accuracy and timing above 1.8V. Operation below 1.8V may result in undefined reset behavior and degraded threshold accuracy.
Is the RESET pin truly open-drain, and what pull-up voltage is allowed?
Yes, RESET is a true open-drain output rated for 6.0V maximum sink voltage. It supports pull-up to any rail ≤5.5V (e.g., 1.8V, 3.3V, or 5V), enabling interoperability with mixed-voltage systems. The datasheet specifies VOL ≤0.4V at 3.5mA sink current, confirming robust low-state drive capability.
Does APX803L20-19SA-7 meet automotive qualification standards?
The APX803L20-19SA-7 itself is not AEC-Q100 qualified; it is rated for industrial temperature range (-40°C to +85°C). For automotive applications, Diodes offers AEC-Q100 qualified variants under different part numbering (e.g., APX803L20-XXSAQ), manufactured in IATF 16949-certified facilities with PPAP support.
APX803L20-19SA-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:
- 1.9V
- 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
APX803L20-19SA-7 FAQ
1.How can I place an order for APX803L20-19SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803L20-19SA-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 APX803L20-19SA-7 reliable?
The price and inventory of APX803L20-19SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803L20-19SA-7 is usually 5 days.
3.What payment methods are accepted for APX803L20-19SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L20-19SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803L20-19SA-7?
APX803L20-19SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803L20-19SA-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 APX803L20-19SA-7?
For technical support, including APX803L20-19SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L20-19SA-7 requirements.
6.How does Aetrix verify that APX803L20-19SA-7 is sourced from the original manufacturer or authorized distributors?
All APX803L20-19SA-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 APX803L20-19SA-7 meets industry standards.
7.What is the process for return or replacement of APX803L20-19SA-7?
All APX803L20-19SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L20-19SA-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 APX803L20-19SA-7 part is unused and in its original packaging.
Return procedure for APX803L20-19SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
APX803L20-19SA-7 Tags
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MIC826SYMT-TR
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