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Diodes Incorporated APX803L20-46SA-7
- Part No.:
- APX803L20-46SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX803L20-46SA-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:4,397
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Product details
Overview
APX803L20-46SA-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, providing precise 4.6V threshold detection with ±1.5% accuracy, 1µA typical supply current, 220ms reset timeout, and open-drain active-low RESET output in SOT23 package. It monitors VCC in battery-powered IoT sensors and portable medical devices to prevent system malfunction during brownout.
For engineers reviewing the APX803L20-46SA-7 datasheet, APX803L20-46SA-7 pinout, APX803L20-46SA-7 application, or APX803L20-46SA-7 equivalent, key selection criteria include threshold voltage tolerance, reset delay stability over temperature, open-drain sink capability (3.5mA @ 0.4V), and compatibility with low-voltage microcontrollers requiring clean power-up sequencing.
Technical Context
The APX803L20-46SA-7 implements a precision bandgap-based voltage reference with hysteresis (0.01×VTH) to prevent oscillation near threshold. Its internal comparator continuously compares VCC against the fixed 4.6V detection level and asserts RESET when VCC drops below VTH–100mV.
Reset assertion is synchronized to VCC crossing the falling threshold; recovery requires VCC to exceed the rising threshold (VTH + VHYS) before RESET deasserts. The 220ms timeout is factory-trimmed and stable across –40°C to +85°C ambient range, with <50ppm/°C temperature coefficient on VTH.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Threshold Voltage | 4.6V ±1.5% - ensures reliable detection of 4.8V nominal rails dropping to 4.6V under load |
| Supply Current | 1.0µA typ., 2.5µA max - enables >10-year battery life in coin-cell–powered wearables |
| Reset Timeout | 220ms (min–max: 143–297ms) - provides sufficient hold time for slow-ramping power supplies |
| Output Type | Open-drain, active-low - allows wired-OR configuration and flexible pull-up voltage selection |
| Response Time | 20µs max - guarantees fast fault capture before µP executes invalid instructions |
| Operating Voltage | 0.9V to 5.5V - supports operation down to near-threshold VCC for last-gasp supervision |
| Temp Range | –40°C to +85°C - qualified for industrial-grade embedded control environments |
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 | Reference ground return path for internal comparator and bandgap circuitry |
| 2 | RESET | Open-drain output; sinks up to 3.5mA at 0.4V drop - requires external pull-up for logic-level signaling |
| 3 | VCC | Power input; supplies internal reference and comparator - must be decoupled with ≥100nF capacitor |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 4.6V threshold | Factory-trimmed without external resistors - eliminates BOM cost and layout sensitivity |
| 220ms reset timeout | Internally generated delay - removes need for external RC timing network and associated drift |
| ±1.5% VTH accuracy | Guaranteed over full temperature range - reduces margining requirements in power-rail validation |
| 1µA supply current | Enables direct connection to always-on battery rails without significant discharge penalty |
| Open-drain RESET | Supports mixed-voltage systems (e.g., 3.3V µP with 5V I/O) via independent pull-up selection |
Applications
| Wearable Health Monitor | Industrial PLC I/O Module |
|---|---|
Use Scenario: Continuous ECG sensing powered by CR2032 coin cell with intermittent BLE transmission. IC Role / Device Role / Timing Role: Voltage supervisor asserting RESET until regulated 3.3V rail stabilizes post-power-on and holds µC in reset during brownout events. Use Value: Prevents corrupted sensor data writes and BLE stack crashes by ensuring µC only exits reset after stable VDD ≥4.6V × 0.98. | Use Scenario: DIN-rail mounted controller with 24V DC input converted to 5V/3.3V for logic and analog front-end. IC Role / Device Role / Timing Role: Monitors 5V supply rail to detect undervoltage caused by aging power supply or cable voltage drop. Use Value: Triggers controlled shutdown sequence via FPGA before ADC reference collapse, preserving calibration integrity. |
| Smart Home Sensor Hub | Automotive Cabin Controller |
Use Scenario: Battery-backed Zigbee gateway with dual-supply (3.3V logic, 1.8V RF) and wake-on-motion functionality. IC Role / Device Role / Timing Role: Supervises primary 3.3V domain; RESET signal feeds µC's NMI pin to force immediate firmware recovery on supply dip. Use Value: Eliminates spurious wakeups and flash corruption by enforcing minimum 220ms reset pulse width during transient dips. | Use Scenario: Non-safety-critical infotainment sub-module powered from vehicle's 12V-to-5V buck converter. IC Role / Device Role / Timing Role: Detects 5V rail collapse during cold-crank (battery sag to 6V) and asserts RESET to halt display driver initialization. Use Value: Avoids display artifacts and I²C bus lockup by preventing peripheral configuration until rail recovers fully. |
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 fixed threshold, 200ms timeout, 1.1µA IQ, SOT23-6 | Requires different threshold and occupies larger footprint; supports manual reset input | Select if system uses 2.2V rail or needs manual reset override capability |
| MAX809SEUR+T | 3.08V threshold, 140ms timeout, 10µA IQ, SOT23-3 | Higher quiescent current; no 4.6V option; same pinout but different VTH and tDELAY | Choose only if 3.08V supervision suffices and higher IQ is acceptable for cost-sensitive designs |
Compared with TPS3808G22DBVR and MAX809SEUR+T, the APX803L20-46SA-7 delivers exact 4.6V detection with lowest supply current and matching SOT23-3 footprint-making it optimal for space-constrained, ultra-low-power 4.5–5.0V rail monitoring where timing and accuracy are critical.
Availability
APX803L20-46SA-7 is available at Aetrix Electronics and suitable for wearable health monitors, industrial PLC I/O modules, smart home sensor hubs, and automotive cabin controllers requiring stable component supply across long production lifecycles.
Supply support for APX803L20-46SA-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 for power management, signal integrity, and connectivity applications.
The APX803L series belongs to Diodes' precision voltage supervisor product line, engineered specifically for ultra-low-power, high-accuracy power-rail monitoring in battery-operated and energy-sensitive embedded systems.
FAQ
What is the exact reset threshold voltage for APX803L20-46SA-7?
The APX803L20-46SA-7 has a factory-set detection threshold of 4.6V with guaranteed accuracy of ±1.5% over –40°C to +85°C ambient temperature. This value is trimmed during production and does not require external components or calibration.
Can APX803L20-46SA-7 drive a 10kΩ pull-up resistor to 5V?
Yes - its open-drain RESET output can sink ≥3.5mA at VOL ≤ 0.4V (tested at VCC = VTH – 0.2V), supporting a 10kΩ pull-up to 5V with VOL = 0.4V and logic-low margin of 4.6V. No additional buffering is required.
Is there a version with adjustable threshold voltage?
No - the APX803L series offers only factory-fixed thresholds from 1.2V to 5.0V in 0.1V steps. For adjustable supervision, Diodes recommends the APX811 series, which uses external resistor dividers to set VTH.
Does APX803L20-46SA-7 meet AEC-Q200 for automotive use?
No - this variant is rated for industrial temperature range (–40°C to +85°C) and is not AEC-Q200 qualified. For automotive applications, Diodes offers the APX803L-A series (e.g., APX803L20-46SA-7Q), which undergoes PPAP and is manufactured in IATF 16949-certified facilities.
APX803L20-46SA-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:
- 4.6V
- 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
APX803L20-46SA-7 FAQ
1.How can I place an order for APX803L20-46SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803L20-46SA-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 APX803L20-46SA-7 reliable?
The price and inventory of APX803L20-46SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803L20-46SA-7 is usually 5 days.
3.What payment methods are accepted for APX803L20-46SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L20-46SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803L20-46SA-7?
APX803L20-46SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803L20-46SA-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 APX803L20-46SA-7?
For technical support, including APX803L20-46SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L20-46SA-7 requirements.
6.How does Aetrix verify that APX803L20-46SA-7 is sourced from the original manufacturer or authorized distributors?
All APX803L20-46SA-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 APX803L20-46SA-7 meets industry standards.
7.What is the process for return or replacement of APX803L20-46SA-7?
All APX803L20-46SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L20-46SA-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 APX803L20-46SA-7 part is unused and in its original packaging.
Return procedure for APX803L20-46SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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