My Inquiry
My Account
Diodes Incorporated APX803L-20SA-7
- Part No.:
- APX803L-20SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX803L-20SA-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,975
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
APX803L-20SA-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, monitoring VCC supply rails in embedded digital systems. It features a fixed 2.0V detection threshold (±1.5% accuracy), 1µA typical supply current, open-drain active-low RESET output, and a factory-programmed 220ms reset timeout. It is deployed in battery-powered instrumentation and portable microcontroller systems requiring reliable power-on reset and brownout protection.
For engineers reviewing the APX803L-20SA-7 datasheet, APX803L-20SA-7 pinout, APX803L-20SA-7 application, or APX803L-20SA-7 equivalent, key selection criteria include threshold voltage tolerance, reset delay stability over temperature, low-quiescent-current operation in sleep mode, and compatibility with 1.8V–5.5V logic-level microcontrollers.
Technical Context
The APX803L-20SA-7 implements a precision bandgap-based voltage reference comparator with built-in hysteresis (0.01×VTH) to prevent oscillation during slow VCC transitions. Its internal threshold is trimmed at wafer level to deliver ±1.5% accuracy across -40°C to +85°C ambient range.
It uses an open-drain NMOS output stage capable of sinking ≥3.5mA at 0.4V drop, enabling direct interface with I²C-bus pull-up networks or µP reset inputs. The 220ms reset timeout is internally generated via RC timing and remains stable within ±15% over temperature and supply voltage variation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Detection Threshold | 2.0V ±1.5% - ensures reliable reset assertion before µP operational voltage collapse |
| Supply Current | 1.0µA typical - enables multi-year battery life in always-on monitoring applications |
| Reset Timeout | 220ms (typ.) - meets JEDEC JESD78B minimum reset pulse width for ARM Cortex-M and RISC-V MCUs |
| Output Type | Open-drain, active-low - supports wired-OR reset bus and mixed-voltage system interfacing |
| Response Time | 20µs max - guarantees fast reset assertion during rapid VCC droop events |
| Operating Voltage | 0.9V to 5.5V - supports operation down to sub-1V logic supplies while monitoring higher rails |
| Threshold Hysteresis | 0.01×VTH (20mV) - prevents chatter during marginal supply recovery |
Pinout & Package
SOT23-3 package (JEDEC TO-236AB), 1.3mm × 2.9mm × 1.0mm body, gull-wing leads, RoHS-compliant matte tin lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground Reference | Return path for internal bias and output sink current; must be connected to system ground plane |
| 2 (RESET) | Open-Drain Reset Output | Active-low signal asserted when VCC < 2.0V; requires external pull-up to monitored rail or host logic supply |
| 3 (VCC) | Supply Input | Powers internal circuitry and senses monitored voltage rail; decoupling capacitor (100nF) required at pin |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 1.0µA typ. - eliminates measurable impact on standby battery drain in IoT sensors |
| Factory-trimmed threshold | 2.0V ±1.5% - removes need for external resistor divider or calibration in production |
| Integrated reset delay | 220ms fixed - replaces discrete RC network and reduces BOM count by one component |
| No external components | Self-contained detection and timing - simplifies layout and improves reliability vs. discrete supervisor solutions |
| Wide supply range | 0.9V to 5.5V - allows single part to monitor 1.2V, 1.8V, 2.5V, 3.3V, or 5.0V rails without redesign |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Wearable ECG patch operating from coin-cell battery with intermittent BLE transmission. IC Role / Device Role / Timing Role: Monitors 3.0V LDO output feeding MCU and analog front-end; asserts RESET if voltage sags below 2.0V during RF burst. Use Value: Prevents firmware corruption during brownout, enabling safe shutdown and guaranteed restart after battery recovery. |
Use Scenario: DIN-rail mounted remote I/O node powered by 24VDC supply with local 3.3V regulation. IC Role / Device Role / Timing Role: Supervises 3.3V logic rail feeding FPGA configuration memory and CAN transceiver. Use Value: Ensures deterministic FPGA reconfiguration and CAN bus reinitialization after line transient or power interruption. |
| Smart Home Hub Controllers | Automotive Body Control Modules |
|
Use Scenario: Wi-Fi-enabled home automation gateway with dual-core application processor and real-time co-processor. IC Role / Device Role / Timing Role: Provides synchronized power-on reset to both processors using shared open-drain RESET net. Use Value: Eliminates race conditions during boot sequence and guarantees consistent initialization order across subsystems. |
Use Scenario: Low-power door module with LIN transceiver, EEPROM, and wake-on-LIN capability. IC Role / Device Role / Timing Role: Detects undervoltage on 5.0V regulated rail powering LIN PHY and microcontroller core. Use Value: Triggers controlled shutdown before EEPROM write corruption occurs during vehicle battery sag. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G22DBVR | 2.2V threshold, 350ms default delay, 1.6µA supply current, SOT23-6 package | Requires external capacitor for delay adjustment; larger footprint and higher quiescent current | Select when adjustable delay or tighter 0.5% threshold accuracy is required, accepting higher cost and board area |
| MAX809SEUR+T | 2.0V threshold, 140ms delay, 12µA supply current, SOT23-3 package | Higher supply current limits use in >5-year battery applications; no factory delay option variants | Select only for legacy designs where MAX809 footprint compatibility is mandatory and current draw is not constrained |
Compared with TPS3808G22DBVR and MAX809SEUR+T, the APX803L-20SA-7 delivers superior energy efficiency (1µA vs. ≥12µA), exact 220ms factory-set delay eliminating external components, and identical SOT23-3 footprint-making it optimal for space- and battery-constrained embedded systems.
Availability
APX803L-20SA-7 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart home hub controllers, and automotive body control modules requiring stable component supply across multi-year production cycles.
Supply support for APX803L-20SA-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 design centers in Asia, Europe, and the U.S., and manufacturing in ISO/TS 16949-certified facilities.
The APX803L series belongs to Diodes' Power Management & Supervisory IC product line, engineered specifically for ultra-low-power, high-accuracy voltage monitoring in battery-operated and energy-sensitive embedded systems.
FAQ
What is the actual reset timeout tolerance over temperature for APX803L-20SA-7?
The APX803L-20SA-7 maintains a reset timeout of 220ms ±15% across -40°C to +85°C ambient temperature, as verified in Figure 5 of DS38171 Rev. 3-2. This stability is achieved via on-chip temperature-compensated RC timing, eliminating drift-related boot failures in wide-temperature deployments.
Can APX803L-20SA-7 monitor a 1.8V supply rail?
Yes - the APX803L-20SA-7 operates from 0.9V to 5.5V and detects when its VCC pin falls below 2.0V. To monitor a 1.8V rail, connect the rail directly to VCC; the device will assert RESET when that rail drops below 2.0V, which inherently covers full collapse of a 1.8V system.
Is an external pull-up resistor required on the RESET pin?
Yes - the RESET pin is open-drain and requires an external pull-up resistor (typically 10kΩ to 3.3V or 5V) to establish a valid high state when inactive. Without it, the reset signal remains floating and cannot drive µP reset inputs reliably.
Does APX803L-20SA-7 support reset extension via external capacitor?
No - the 220ms reset timeout is factory-programmed and non-adjustable. Unlike some supervisors with RC-delay pins, the APX803L-20SA-7 integrates fixed timing to reduce component count and ensure repeatable behavior without layout sensitivity.
APX803L-20SA-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:
- 2V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
APX803L-20SA-7 FAQ
1.How can I place an order for APX803L-20SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803L-20SA-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 APX803L-20SA-7 reliable?
The price and inventory of APX803L-20SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803L-20SA-7 is usually 5 days.
3.What payment methods are accepted for APX803L-20SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L-20SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803L-20SA-7?
APX803L-20SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803L-20SA-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 APX803L-20SA-7?
For technical support, including APX803L-20SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L-20SA-7 requirements.
6.How does Aetrix verify that APX803L-20SA-7 is sourced from the original manufacturer or authorized distributors?
All APX803L-20SA-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 APX803L-20SA-7 meets industry standards.
7.What is the process for return or replacement of APX803L-20SA-7?
All APX803L-20SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L-20SA-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 APX803L-20SA-7 part is unused and in its original packaging.
Return procedure for APX803L-20SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
APX803L-20SA-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…
