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Diodes Incorporated APX803L20-17SA-7
- Part No.:
- APX803L20-17SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX803L20-17SA-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:1,085
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Product details
Overview
APX803L20-17SA-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, and 1µA typical supply current in SOT23-3 package. It delivers active-low open-drain reset signaling for power monitoring in battery-powered IoT sensors and portable medical devices.
For engineers reviewing the APX803L20-17SA-7 datasheet, APX803L20-17SA-7 pinout, APX803L20-17SA-7 application, or APX803L20-17SA-7 equivalent, key selection criteria include threshold voltage tolerance, reset delay stability over temperature, low-quiescent-current operation, and compatibility with 1.8V–5.5V supply rails in space-constrained embedded systems.
Technical Context
The APX803L20-17SA-7 integrates a precision bandgap reference and comparator to monitor VCC against a fixed 2.0V threshold, with hysteresis of 0.01×VTH to prevent chatter during brownout recovery. Its internal timing circuit generates a guaranteed 220ms (min–max: 143–297ms) active-low reset pulse after VCC drops below threshold.
Operating from 0.9V to 5.5V supply, it features an open-drain RESET output capable of sinking 3.5mA at 0.4V max VOL, enabling direct interface with µP reset inputs without external pull-up resistors. The device exhibits 50ppm/°C threshold drift and maintains 1µA supply current across –40°C to +85°C ambient range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.0V ±1.5% - ensures reliable detection of 2.0V supply rail collapse with minimal false triggering |
| Supply Current | 1.0µA typical - enables multi-year battery life in always-on wearable sensors |
| Reset Timeout | 220ms nominal (143–297ms) - meets JEDEC JESD78B minimum reset assertion time for ARM Cortex-M0+ MCUs |
| Output Type | Open-drain, active-low - supports wired-OR reset bus and flexible pull-up voltage selection (1.8V/3.3V/5V) |
| Response Time | 20µs max - guarantees fast reset assertion during rapid VCC droop events |
| Operating Temp | –40°C to +85°C - qualified for industrial-grade embedded control applications |
| Threshold Hysteresis | 0.01×VTH - prevents oscillation during slow-rising VCC recovery |
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 | Return path for internal bias and output sink current; must connect to system ground plane |
| 2 (RESET) | Open-Drain Reset Output | Active-low signal asserted when VCC < 2.0V; requires external pull-up for logic-high state |
| 3 (VCC) | Supply Input | Power source for internal circuitry; operates from 0.9V to 5.5V with no external decoupling required |
Key Features
| Feature | Design Value |
|---|---|
| No external components needed | Integrated reference, comparator, and timing circuit eliminate BOM cost and layout area for discrete supervisors |
| Fixed 2.0V threshold | Factory-trimmed voltage eliminates calibration effort and improves production yield vs. adjustable solutions |
| 220ms reset delay | Guaranteed minimum assertion time ensures full µP initialization before release, avoiding boot failure |
| 1µA supply current | Reduces standby power by >95% versus legacy 10µA supervisors, critical for coin-cell-powered devices |
| ±1.5% threshold accuracy | Minimizes design margin overhead-enables tighter VCC regulation and smaller input capacitors |
Applications
| Smart Wearable Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Continuous ECG monitoring using coin-cell battery and ultra-low-power MCU. IC Role / Device Role / Timing Role: Voltage supervisor asserting reset until regulated 2.0V rail stabilizes post-battery insertion or cold start. Use Value: Prevents MCU lockup during weak battery ramp-up; 1µA quiescent current extends operational life beyond 3 years. | Use Scenario: Digital input card powered from isolated 3.3V DC-DC converter in factory automation cabinet. IC Role / Device Role / Timing Role: Monitors 3.3V rail integrity and asserts 220ms reset pulse on undervoltage to ensure deterministic FPGA configuration. Use Value: Eliminates need for external RC timing network; ±1.5% threshold ensures consistent trip point across temperature and unit-to-unit variation. |
| Medical Point-of-Care Analyzers | Wireless Sensor Nodes (LoRaWAN) |
Use Scenario: Handheld blood glucose meter with dual 1.5V alkaline cells and buck-boost regulator. IC Role / Device Role / Timing Role: Detects 2.0V under-voltage condition on regulated output to force controlled shutdown before data corruption. Use Value: 20µs response time captures fast transients; hysteresis prevents repeated resets during marginal battery discharge. | Use Scenario: Battery-powered soil moisture node transmitting hourly via LoRa transceiver. IC Role / Device Role / Timing Role: Supervises 3.0V LDO output feeding MCU and radio; holds reset during wake-up voltage sag. Use Value: Open-drain output interfaces directly with 3.3V MCU reset pin; 220ms timeout exceeds LoRa chip's 100ms minimum reset hold requirement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803S20DBZR | 2.0V threshold, 200ms delay, 0.5µA IQ, SOT23-3 - lower supply current but tighter 1% accuracy spec | Requires external pull-up resistor; lacks hysteresis specification in datasheet | Preferred for ultra-low-power designs where 0.5µA savings outweighs need for verified hysteresis behavior |
| MAX809SEUR+T | 2.0V threshold, 140ms delay, 10µA IQ, SOT23-3 - higher supply current, wider delay tolerance (±50%) | Higher IQ increases battery load; delay variation may violate strict MCU reset timing requirements | Acceptable only in non-battery applications with ample power budget and relaxed timing margins |
Compared with TLV803S20DBZR and MAX809SEUR+T, the APX803L20-17SA-7 offers optimal balance of ultra-low IQ (1µA), guaranteed 220ms delay, and documented hysteresis-making it superior for battery-critical, timing-sensitive embedded systems requiring long service life and deterministic reset behavior.
Availability
APX803L20-17SA-7 is available at Aetrix Electronics and suitable for smart wearables, industrial PLC modules, and portable medical diagnostics requiring stable component supply and long-term lifecycle support.
Supply support for APX803L20-17SA-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 for power management, signal integrity, and connectivity applications.
The APX803L series belongs to Diodes' µP supervisory product line, engineered specifically for high-accuracy, ultra-low-power voltage monitoring in battery-operated and energy-sensitive embedded systems.
FAQ
What is the exact reset threshold voltage and its tolerance for APX803L20-17SA-7?
The APX803L20-17SA-7 has a factory-set reset threshold of 2.0V with a guaranteed accuracy of ±1.5% over temperature (–40°C to +85°C), corresponding to a 1.97V to 2.03V range at +25°C and maintaining ±1.5% across full operating conditions per DS38171 Rev. 3–2.
Does APX803L20-17SA-7 require an external pull-up resistor on the RESET pin?
Yes - the RESET pin is open-drain and active-low, so an external pull-up resistor to the monitored supply or logic rail is mandatory to establish a valid high-level state when not asserted; typical values range from 10kΩ to 100kΩ depending on rise-time and bus loading requirements.
Can APX803L20-17SA-7 operate from a 1.8V supply rail?
Yes - the device operates from VCC = 0.9V to 5.5V, and its 2.0V threshold remains valid even when powered from 1.8V, provided the monitored rail is ≥2.0V; however, RESET output low voltage (VOL ≤0.4V at 3.5mA) is specified only when VCC ≥ VTH – 0.2V (i.e., ≥1.8V).
Is APX803L20-17SA-7 pin-compatible with other APX803L variants in SOT23-3?
Yes - all APX803L variants in SA (SOT23) and SR (SOT23R) packages share identical 3-pin SOT23-3 pinout (GND, RESET, VCC), enabling drop-in replacement across threshold and delay options without PCB redesign or layout changes.
APX803L20-17SA-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:
- 1.7V
- 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
APX803L20-17SA-7 FAQ
1.How can I place an order for APX803L20-17SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803L20-17SA-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 APX803L20-17SA-7 reliable?
The price and inventory of APX803L20-17SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803L20-17SA-7 is usually 5 days.
3.What payment methods are accepted for APX803L20-17SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L20-17SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803L20-17SA-7?
APX803L20-17SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803L20-17SA-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 APX803L20-17SA-7?
For technical support, including APX803L20-17SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L20-17SA-7 requirements.
6.How does Aetrix verify that APX803L20-17SA-7 is sourced from the original manufacturer or authorized distributors?
All APX803L20-17SA-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 APX803L20-17SA-7 meets industry standards.
7.What is the process for return or replacement of APX803L20-17SA-7?
All APX803L20-17SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L20-17SA-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 APX803L20-17SA-7 part is unused and in its original packaging.
Return procedure for APX803L20-17SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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