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Diodes Incorporated APX803L20-29SR-7
- Part No.:
- APX803L20-29SR-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX803L20-29SR-7.pdf
- Description:
- RESET GENERATOR SOT23 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
APX803L20-29SR-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, providing precise 2.9V threshold detection with ±1.5% accuracy, 1µA typical supply current, 220ms reset timeout, and open-drain active-low RESET output in SOT23R package. It monitors VCC in battery-powered embedded systems to assert reset during brownout conditions.
For engineers reviewing the APX803L20-29SR-7 datasheet, APX803L20-29SR-7 pinout, APX803L20-29SR-7 application, or APX803L20-29SR-7 equivalent, key selection criteria include threshold voltage tolerance, reset delay stability over temperature, low-quiescent-current operation in sleep mode, and compatibility with 1.02×VTH release hysteresis in µC power sequencing.
Technical Context
The APX803L20-29SR-7 implements a precision bandgap-based voltage reference with internal hysteresis (0.01×VTH) to prevent oscillation near threshold. Its comparator drives an open-drain NMOS output stage capable of sinking ≥3.5mA at 0.4V drop.
Reset assertion occurs within 20µs of VCC falling below 2.9V, and remains active until VCC exceeds 2.929V (1.02×VTH), with guaranteed 220ms minimum timeout across –40°C to +85°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Threshold Voltage | 2.9V ±1.5% - ensures reliable µP reset initiation at defined supply rail margin |
| Supply Current | 1.0µA typical - enables multi-year battery life in always-on monitoring applications |
| Reset Timeout | 220ms (min) - provides sufficient hold time for full µC initialization and clock stabilization |
| Output Type | Open-drain, active-low - allows wired-OR reset bus configuration and flexible pull-up voltage selection |
| Response Time | 20µs max - guarantees rapid fault capture before system state corruption occurs |
| Operating Temp | –40°C to +85°C - supports industrial-grade deployment without derating |
| Hysteresis | 0.01×VTH - prevents chatter during slow-rising/falling supply transitions |
Pinout & Package
SOT23R (3-pin, 1.3mm × 2.9mm, 0.95mm height) with gull-wing leads; RoHS-compliant, halogen-free, lead-free construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Reference ground return path for internal comparator and output stage |
| 2 | RESET | Open-drain output; pulled low when VCC < 2.9V, high-impedance otherwise |
| 3 | VCC | Power input; supplies internal reference, comparator, and output driver |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 2.9V threshold | Eliminates external resistor network, reducing BOM count and layout area |
| 220ms factory-programmed delay | Guarantees consistent reset duration without timing capacitor tolerance drift |
| ±1.5% threshold accuracy | Enables tight VCC margining for low-voltage µPs (e.g., 3.0V nominal rails) |
| 1µA supply current | Minimizes standby power draw in IoT sensor nodes with 10-year battery targets |
| No external components | Reduces design validation effort and eliminates capacitor aging/leakage concerns |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Continuous glucose monitor operating on coin-cell battery with 2.9V LiMnO₂ supply. IC Role / Device Role / Timing Role: Voltage supervisor asserting RESET to MSP430FR59xx MCU during battery depletion. Use Value: 220ms timeout ensures complete ADC calibration and EEPROM write completion before shutdown. | Use Scenario: DIN-rail mounted analog input module powered by isolated 3.3V DC-DC converter. IC Role / Device Role / Timing Role: Power-on reset generator for STM32H743VI MCU during cold start after field wiring. Use Value: ±1.5% threshold accuracy prevents false resets caused by 3.3V rail ripple (±50mV). |
| Smart Home Hub Controllers | Automotive Body Control Modules |
Use Scenario: Wi-Fi-enabled HVAC controller using 3.0V LDO with transient load steps. IC Role / Device Role / Timing Role: Brownout detector triggering controlled firmware recovery sequence. Use Value: 20µs response time captures sub-millisecond dips induced by RF transceiver bursts. | Use Scenario: 12V-to-3.3V converted supply for LIN gateway MCU in door module. IC Role / Device Role / Timing Role: Supervisory watchdog ensuring safe state entry during ignition cycle transitions. Use Value: –40°C to +85°C rating maintains reset integrity across automotive under-hood thermal profiles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G29DBVR | 2.9V threshold, 250ms fixed delay, 1.6µA supply current, SOT23-6 package | Requires external pull-up; larger footprint; higher quiescent current | Select if longer timeout or dual-supply monitoring required |
| MAX809SEUR+T | 2.93V threshold, 140ms min delay, 12µA supply current, SOT23-3 package | Higher ICC reduces battery life; looser ±2.5% threshold tolerance | Select only for cost-sensitive legacy designs where 12µA is acceptable |
Compared with TPS3808G29DBVR and MAX809SEUR+T, the APX803L20-29SR-7 delivers superior battery efficiency (1µA vs. ≥12µA), tighter threshold accuracy (±1.5% vs. ±2.5%), and identical SOT23-3 footprint-making it optimal for space-constrained, long-life portable electronics.
Availability
APX803L20-29SR-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 extended production lifecycles.
Supply support for APX803L20-29SR-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 devices for power management, signal integrity, and protection applications.
The APX803L series belongs to Diodes' µP supervisory product line, engineered specifically for ultra-low-power, high-accuracy reset generation in battery-operated and energy-sensitive embedded systems.
FAQ
What is the exact reset threshold voltage and its tolerance for APX803L20-29SR-7?
The APX803L20-29SR-7 has a nominal reset threshold of 2.90V with a guaranteed tolerance of ±1.5% over temperature (–40°C to +85°C), meaning the actual trip point falls between 2.8565V and 2.9435V under all operating conditions.
Does APX803L20-29SR-7 require an external pull-up resistor on the RESET pin?
Yes - the RESET pin is open-drain and requires an external pull-up resistor to a valid logic-high voltage (e.g., VCC or another supply rail). Typical values range from 10kΩ to 100kΩ depending on bus capacitance and rise-time requirements.
Can APX803L20-29SR-7 operate with supply voltages below 2.9V?
Yes - the device operates down to 0.9V supply (per Recommended Operating Conditions), but reset assertion only occurs when VCC drops below 2.9V. Below ~1.0V, internal circuitry may cease functioning, though the output remains latched low until power is fully removed.
How does the 220ms reset timeout behave across temperature and supply voltage variations?
The 220ms timeout is factory-trimmed and specified as minimum value across –40°C to +85°C and 0.9V–5.5V VCC range. Measured data shows variation from 220ms to 297ms (max) at +85°C, ensuring robust hold time under worst-case conditions.
APX803L20-29SR-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:
- Voltage Detector
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.9V
- 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:
- SOT23R
APX803L20-29SR-7 FAQ
1.How can I place an order for APX803L20-29SR-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803L20-29SR-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 APX803L20-29SR-7 reliable?
The price and inventory of APX803L20-29SR-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803L20-29SR-7 is usually 5 days.
3.What payment methods are accepted for APX803L20-29SR-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L20-29SR-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803L20-29SR-7?
APX803L20-29SR-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803L20-29SR-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 APX803L20-29SR-7?
For technical support, including APX803L20-29SR-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L20-29SR-7 requirements.
6.How does Aetrix verify that APX803L20-29SR-7 is sourced from the original manufacturer or authorized distributors?
All APX803L20-29SR-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 APX803L20-29SR-7 meets industry standards.
7.What is the process for return or replacement of APX803L20-29SR-7?
All APX803L20-29SR-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L20-29SR-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 APX803L20-29SR-7 part is unused and in its original packaging.
Return procedure for APX803L20-29SR-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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