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Diodes Incorporated APX803L20-32SA-7
- Part No.:
- APX803L20-32SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX803L20-32SA-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,929
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Product details
Overview
APX803L20-32SA-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, monitoring VCC supply rails in embedded and battery-powered systems. It features a fixed 3.2V detection threshold (±1.5% accuracy), 1µA typical supply current, 220ms reset timeout, open-drain active-low RESET output, and operates from 0.9V to 5.5V supply. It is used in portable equipment where low quiescent current and precise power-up sequencing are critical.
For engineers reviewing the APX803L20-32SA-7 datasheet, APX803L20-32SA-7 pinout, APX803L20-32SA-7 application, or APX803L20-32SA-7 equivalent, this page delivers verified technical context, package mapping, real-world timing behavior, and validated alternative options - all grounded in Diodes Incorporated's DS38171 Rev. 3–2 specification.
Technical Context
The APX803L20-32SA-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 3.2V and holds it low until VCC exceeds 3.2V + hysteresis.
It integrates a factory-programmed 220ms recovery delay (typ. 220ms, min 143ms, max 297ms over temperature), requires no external components, and supports operation across –40°C to +85°C ambient with <2.5µA max supply current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Detection Threshold | 3.2V ±1.5% - ensures reliable µP reset initiation at defined supply level, minimizing false triggers. |
| Supply Current | 1.0µA (typ.), 2.5µA (max) - enables multi-year battery life in always-on monitoring applications. |
| Reset Timeout | 220ms (typ.), 143–297ms range - provides sufficient hold time for system stabilization after power recovery. |
| Output Type | Open-drain, active-low - allows wired-OR configuration and flexible pull-up voltage selection (up to 5.5V). |
| Response Time | ≤20µs - guarantees fast assertion of RESET upon undervoltage event, meeting µP reset timing requirements. |
| Operating Voltage | 0.9V to 5.5V - supports wide input range including single-cell Li-ion, 3.3V, and 5V logic rails. |
| Hysteresis | 0.01×VTH (≈32mV) - prevents chatter during slow-rising/falling VCC transitions near threshold. |
Pinout & Package
SOT23-3 package (JEDEC TO-236AB), 1.3mm × 2.9mm × 1.0mm body, gull-wing leads, RoHS-compliant, halogen-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference | Return path for internal circuitry; must be connected directly to system ground plane for stable threshold accuracy. |
| 2 (RESET) | Open-drain reset output | Active-low signal asserted when VCC < 3.2V; requires external pull-up to define logic-high level and drive strength. |
| 3 (VCC) | Supply input | Monitored power rail input; powers internal circuitry and defines detection reference; decoupling capacitor recommended. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low supply current | 1.0µA typ. - reduces standby power burden in energy-constrained IoT sensors and wearables. |
| Factory-set 3.2V threshold | ±1.5% accuracy over temperature - eliminates need for external resistor dividers or calibration. |
| Programmed 220ms delay | Guaranteed 143–297ms window - ensures robust reset hold time across industrial temperature range. |
| No external components | Self-contained detection and timing - simplifies BOM, PCB layout, and qualification testing. |
| Open-drain output | Compatible with 1.8V–5.5V I/O domains - enables direct interface to diverse µP reset inputs without level shifters. |
Applications
| Smartphone Power Sequencing | Industrial PLC Controller Monitoring |
|---|---|
|
Use Scenario: Monitors main PMIC output rail during cold start and brownout events in smartphone application processors. IC Role / Device Role / Timing Role: Voltage supervisor providing active-low RESET to SoC, asserting within 20µs of VCC drop below 3.2V and holding for 220ms post-recovery. Use Value: Prevents processor lockup by ensuring clean reset before firmware execution begins, even under noisy battery discharge profiles. |
Use Scenario: Supervises 3.3V I/O supply in programmable logic controller backplane modules operating in harsh factory environments. IC Role / Device Role / Timing Role: Standalone reset generator with guaranteed 220ms timeout, immune to transient dips caused by relay switching or motor startup. Use Value: Eliminates need for discrete RC timing networks, improving long-term reliability and reducing field failure rates due to capacitor aging. |
| Portable Medical Sensor Hub | Automotive Body Control Module (BCM) |
|
Use Scenario: Ensures reliable boot of ultra-low-power MCU in wearable ECG sensor hub powered by coin cell. IC Role / Device Role / Timing Role: Micro-power supervisor drawing only 1µA, detecting 3.2V rail collapse and asserting RESET to halt unsafe operation. Use Value: Extends battery service life beyond 2 years while maintaining fail-safe behavior during low-battery shutdown sequences. |
Use Scenario: Monitors 5V domain powering CAN transceivers and LIN peripherals in non-safety-critical BCM subsystems. IC Role / Device Role / Timing Role: Reset initiator with 3.2V threshold and 220ms hold time, compatible with automotive-grade SOT23 packaging. Use Value: Provides AEC-Q200-aligned supervision (package qualified) without requiring full AEC-Q100 certification for cost-sensitive submodules. |
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 | 3.0V threshold (±1.5%), same 220ms delay, identical SOT23-3 package and pinout | Used where system brownout margin requires earlier reset assertion (3.0V vs. 3.2V) | Select when VCC nominal is 3.3V with tighter tolerance or higher load-induced droop expected. |
| APX803L20-36SA-7 | 3.6V threshold (±1.5%), same 220ms delay, identical SOT23-3 package and pinout | Deployed in 5V-tolerant I/O domains or systems with higher noise immunity requirements | Choose for 3.6V–5V rails where extended undervoltage margin before reset is needed. |
Compared with APX803L20-29SA-7 and APX803L20-36SA-7, the APX803L20-32SA-7 offers optimal reset timing alignment for standard 3.3V LDO outputs with ±5% regulation, balancing early fault detection against nuisance tripping during transient load steps.
Availability
APX803L20-32SA-7 is available at Aetrix Electronics and suitable for portable medical devices, industrial controllers, and battery-powered IoT endpoints requiring stable component supply with consistent parametric performance across production lots.
Supply support for APX803L20-32SA-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 emphasis on 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 space- and energy-constrained embedded systems.
FAQ
What is the exact reset threshold voltage for APX803L20-32SA-7?
The APX803L20-32SA-7 has a factory-trimmed detection threshold of 3.2V with ±1.5% accuracy over temperature (–40°C to +85°C). This value is fixed internally and does not require external adjustment. Measured hysteresis is 0.01×VTH (≈32mV), ensuring stable release above 3.232V.
Can APX803L20-32SA-7 operate with a 1.8V supply rail?
No - the APX803L20-32SA-7 requires minimum 0.9V to power its internal circuitry but is specified to monitor rails up to 5.5V. Its 3.2V threshold makes it unsuitable for direct supervision of 1.8V rails; use APX803L-18SA-7 (1.8V variant) instead.
Is an external pull-up resistor required on the RESET pin?
Yes - the RESET pin is open-drain and must be pulled up externally to a valid logic-high voltage (1.8V–5.5V). Typical values range from 10kΩ to 100kΩ depending on bus capacitance and rise-time requirements. No internal pull-up is present.
Does APX803L20-32SA-7 support automotive qualification?
The APX803L20-32SA-7 uses SOT23-3 packaging qualified per AEC-Q200, but the device itself is not AEC-Q100 qualified. For automotive applications requiring full qualification, contact Diodes Incorporated for PPAP-capable variants or consult their automotive product definitions portal.
APX803L20-32SA-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:
- 3.2V
- 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
APX803L20-32SA-7 FAQ
1.How can I place an order for APX803L20-32SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803L20-32SA-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 APX803L20-32SA-7 reliable?
The price and inventory of APX803L20-32SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803L20-32SA-7 is usually 5 days.
3.What payment methods are accepted for APX803L20-32SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L20-32SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803L20-32SA-7?
APX803L20-32SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803L20-32SA-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 APX803L20-32SA-7?
For technical support, including APX803L20-32SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L20-32SA-7 requirements.
6.How does Aetrix verify that APX803L20-32SA-7 is sourced from the original manufacturer or authorized distributors?
All APX803L20-32SA-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 APX803L20-32SA-7 meets industry standards.
7.What is the process for return or replacement of APX803L20-32SA-7?
All APX803L20-32SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L20-32SA-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 APX803L20-32SA-7 part is unused and in its original packaging.
Return procedure for APX803L20-32SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
APX803L20-32SA-7 Tags
-
MIC826SYMT-TR
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