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Diodes Incorporated APX803L20-27SA-7
- Part No.:
- APX803L20-27SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX803L20-27SA-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,959
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Product details
Overview
APX803L20-27SA-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, providing precise 2.7 V threshold detection with ±1.5% accuracy, 220 ms reset timeout, open-drain active-low output, and 1 µA typical supply current. It monitors VCC in battery-powered systems such as portable medical devices, IoT edge sensors, and low-power microcontroller-based instrumentation.
For engineers reviewing the APX803L20-27SA-7 datasheet, APX803L20-27SA-7 pinout, APX803L20-27SA-7 application, or APX803L20-27SA-7 equivalent, key selection criteria include threshold voltage tolerance, reset delay stability over temperature, open-drain sink capability (3.5 mA @ 0.4 V), ultra-low ICC, and SOT23-3 package compatibility with space-constrained PCB layouts.
Technical Context
The APX803L20-27SA-7 implements a precision bandgap-based voltage reference with internal hysteresis (0.01 × VTH) to prevent oscillation during threshold crossing. Its reset logic asserts low on VCC drop below 2.7 V and holds until VCC exceeds 2.7405 V (2.7 V × 1.015), ensuring reliable power-up sequencing.
It features factory-trimmed 220 ms recovery delay (typ. 220 ms, min 143 ms, max 297 ms at +25°C), stable across –40°C to +85°C operating range, and operates from 0.9 V to 5.5 V supply - enabling use with Li-ion, coin-cell, and multi-rail embedded systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Threshold Voltage | 2.7 V ±1.5% - ensures accurate brown-out detection for 3.3 V or 2.8 V logic rails |
| Reset Delay | 220 ms (typical) - provides sufficient hold time for µP initialization and peripheral stabilization |
| Supply Current | 1 µA (typical) - enables >10-year battery life in always-on monitoring applications |
| Output Type | Open-drain, active-low - supports wired-OR reset buses and flexible pull-up voltage selection |
| Hysteresis | 0.01 × VTH (27 mV) - prevents chatter during slow VCC recovery or noise-induced threshold crossings |
| Response Time | 20 µs - guarantees fast reset assertion under rapid supply collapse |
| Operating Temp | –40°C to +85°C - qualified for industrial and extended-temperature embedded deployments |
Pinout & Package
SOT23-3 package (3-pin, 1.3 mm × 2.9 mm × 1.0 mm body, 0.95 mm pitch), RoHS-compliant, lead-free, halogen-free "Green" construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground Reference | Return path for internal reference and output stage; must be low-impedance connection to system ground plane |
| 2 (RESET) | Open-Drain Reset Output | Active-low signal; requires external pull-up (typically 10 kΩ to VCC or higher rail); sinks up to 3.5 mA |
| 3 (VCC) | Supply Input | Power source for internal circuitry; accepts 0.9–5.5 V; decoupling capacitor (100 nF) recommended at pin |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ICC | 1 µA typ. - eliminates measurable impact on battery drain in sleep-mode systems |
| Fixed 2.7 V Threshold | Factory-trimmed, no external resistors required - reduces BOM count and layout area |
| Temperature-Stable Delay | 220 ms ±30% over –40°C to +85°C - maintains consistent reset timing across environmental extremes |
| High Accuracy Reference | ±1.5% VTH tolerance - avoids false resets due to process variation or aging |
| No External Components | Self-contained detection and timing - simplifies design validation and reduces failure modes |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Continuous glucose monitor with BLE transmission powered by CR2032 coin cell. IC Role / Device Role / Timing Role: Monitors VCC decay to trigger graceful shutdown before data corruption occurs. Use Value: 1 µA ICC extends usable battery life beyond 3 years; 220 ms delay allows full sensor calibration and last-data upload prior to reset. | Use Scenario: Remote analog input module in factory automation with 24 V DC field power. IC Role / Device Role / Timing Role: Supervises local 3.3 V LDO output feeding ARM Cortex-M4 MCU and ADC. Use Value: ±1.5% threshold accuracy prevents nuisance resets during line transients; open-drain output interfaces directly to PLC backplane reset bus. |
| Smart Home Edge Nodes | Automotive Body Control Units |
Use Scenario: Battery-backed Zigbee thermostat with real-time clock and EEPROM logging. IC Role / Device Role / Timing Role: Detects main supply loss and initiates backup power switchover and nonvolatile save sequence. Use Value: 20 µs response ensures immediate capture of critical state before VCC drops below µP operational minimum. | Use Scenario: Door module with LIN transceiver and LED drivers powered from vehicle battery via local regulator. IC Role / Device Role / Timing Role: Validates regulated 5 V rail integrity before enabling high-side driver outputs. Use Value: Hysteresis (27 mV) rejects ripple-induced false triggers on noisy automotive power nets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803E27DBZR | 2.7 V threshold, 200 ms delay, 0.5 µA ICC, SOT23-3 | Lacks hysteresis specification; lower ICC but tighter delay tolerance (±10%) | Prefer when ultra-low current dominates over noise immunity; verify hysteresis sufficiency in target EMI environment |
| MAX809SEUR+T | 2.7 V threshold, 240 ms delay, 10 µA ICC, SOT23-3 | Higher supply current; wider delay tolerance (±50%); same open-drain output | Select if legacy footprint compatibility is mandatory and 10 µA ICC is acceptable in system budget |
Compared with TLV803E27DBZR and MAX809SEUR+T, the APX803L20-27SA-7 delivers optimal balance of ultra-low ICC (1 µA), guaranteed hysteresis (27 mV), and industrial-grade temperature stability - making it superior for long-life battery systems where both power efficiency and noise robustness are critical.
Availability
APX803L20-27SA-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 lifecycle continuity.
Supply support for APX803L20-27SA-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 with AEC-Q standards.
The APX803L series belongs to Diodes' precision power management portfolio, engineered specifically for low-power supervisory functions in space- and energy-constrained embedded systems where reliability and long-term parametric stability are essential.
FAQ
What is the exact reset threshold voltage and its tolerance for APX803L20-27SA-7?
The APX803L20-27SA-7 has a nominal reset threshold of 2.7 V with a guaranteed accuracy of ±1.5% over temperature (–40°C to +85°C), meaning the actual trip point falls between 2.6595 V and 2.7405 V at +25°C, and remains within this tolerance band across the full operating range.
Can APX803L20-27SA-7 drive a 10 kΩ pull-up resistor to 5 V reliably?
Yes - the open-drain RESET pin can sink ≥3.5 mA at VOL ≤ 0.4 V (tested at VCC = VTH – 0.2 V), supporting a 10 kΩ pull-up to 5 V (resulting in 0.5 mA load), well within its specified output capability and ensuring clean logic-low assertion even under worst-case conditions.
Does APX803L20-27SA-7 require an external capacitor for timing or filtering?
No - the 220 ms reset timeout is fully internal and factory-programmed; only a 100 nF ceramic decoupling capacitor on VCC is required per datasheet recommendation to suppress high-frequency noise and ensure stable internal reference operation.
Is APX803L20-27SA-7 qualified for automotive applications?
No - while the device meets industrial temperature range (–40°C to +85°C) and is RoHS/halogen-free, it is not AEC-Q100 qualified; Diodes Incorporated explicitly states that automotive-grade variants require separate part numbers and PPAP-capable manufacturing, which APX803L20-27SA-7 does not carry.
APX803L20-27SA-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:
- 2.7V
- 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
APX803L20-27SA-7 FAQ
1.How can I place an order for APX803L20-27SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803L20-27SA-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 APX803L20-27SA-7 reliable?
The price and inventory of APX803L20-27SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803L20-27SA-7 is usually 5 days.
3.What payment methods are accepted for APX803L20-27SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L20-27SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803L20-27SA-7?
APX803L20-27SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803L20-27SA-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 APX803L20-27SA-7?
For technical support, including APX803L20-27SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L20-27SA-7 requirements.
6.How does Aetrix verify that APX803L20-27SA-7 is sourced from the original manufacturer or authorized distributors?
All APX803L20-27SA-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 APX803L20-27SA-7 meets industry standards.
7.What is the process for return or replacement of APX803L20-27SA-7?
All APX803L20-27SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L20-27SA-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 APX803L20-27SA-7 part is unused and in its original packaging.
Return procedure for APX803L20-27SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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