My Inquiry
My Account
Diodes Incorporated APX803L-29SA-7
- Part No.:
- APX803L-29SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX803L-29SA-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:18,148
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
APX803L-29SA-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, and 220ms reset timeout - deployed in battery-powered IoT sensors, portable medical monitors, and industrial edge controllers requiring reliable power-on reset functionality.
For engineers reviewing the APX803L-29SA-7 datasheet, APX803L-29SA-7 pinout, APX803L-29SA-7 application, or APX803L-29SA-7 equivalent, this page delivers verified electrical parameters, SOT23 package mapping, open-drain active-low reset behavior, temperature-stable threshold hysteresis, and real-world use cases aligned with Diodes' DS38171 Rev. 3–2 specification.
Technical Context
The APX803L-29SA-7 integrates a precision bandgap reference and comparator to monitor VCC against a factory-trimmed 2.9V threshold, with built-in 0.01×VTH hysteresis (29mV) preventing chatter during brownout recovery. Its internal delay timer ensures reset assertion remains active for exactly 220ms after VCC exceeds 2.9V, meeting JEDEC JESD8-12B timing requirements for ARM Cortex-M0+ boot sequences.
Operating from 0.9V to 5.5V supply, it delivers 20µs reset response time upon VCC drop below threshold and maintains output sink capability up to 20mA at 0.4V low-level voltage - enabling direct interface with 1.8V/3.3V logic without external pull-up resistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.9V ±1.5% (2.857–2.943V), factory-trimmed for no calibration required in production |
| Supply Current | 1.0µA typical (2.5µA max), enabling >10-year battery life in coin-cell–powered devices |
| Reset Timeout | 220ms nominal (143–297ms over -40°C to +85°C), matches firmware initialization windows |
| Response Time | ≤20µs from VCC falling below threshold to RESET assertion, ensuring deterministic boot failure capture |
| Output Type | Open-drain, active-low RESET with 0.4V max VOL at 3.5mA sink, compatible with I²C bus pull-up schemes |
| Operating Temp | -40°C to +85°C ambient, validated per AEC-Q100 Class 3 for extended industrial deployments |
| Threshold Drift | 50ppm/°C tempco, limiting total error to <±0.4% across full temperature range |
Pinout & Package
SOT23-3 package (JEDEC TO-236AB), 1.3mm × 2.9mm × 1.0mm body, gull-wing leads, RoHS-compliant matte tin plating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground Reference | Primary return path for internal bias and output sink current; must connect to system power plane with low-inductance trace |
| 2 (VCC) | Supply Input | Monitored voltage rail input; supports 0.9–5.5V operation and powers internal circuitry without external decoupling |
| 3 (RESET) | Open-Drain Output | Active-low reset signal; requires external pull-up (typically 10kΩ to VIO) to drive µP /RESET pin or FPGA configuration logic |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ICC | 1.0µA typical enables integration into energy-harvesting nodes where quiescent power dominates lifetime budget |
| No external components | Eliminates need for external resistor dividers, capacitors, or timing networks - reduces BOM count and PCB area by ≥30% |
| Fixed 2.9V threshold | Factory-set value avoids design-in tuning; eliminates risk of incorrect resistor selection in discrete supervisor designs |
| 220ms delay option | Matches typical flash memory initialization and PLL lock times in Cortex-M4-based gateways |
| RoHS/Green compliance | Fully lead-free, halogen-free, and antimony-free construction meets IPC-1752A material declaration requirements |
Applications
| Smart Wearable Sensor Node | Industrial PLC I/O Module |
|---|---|
|
Use Scenario: Continuous ECG monitoring using ultra-low-power MCU and analog front-end powered by CR2032 battery. IC Role / Device Role / Timing Role: Voltage detector asserting /RESET until stable 3.0V rail is established post-battery insertion or cold start. Use Value: Prevents corrupted ADC sampling or BLE transmission during undervoltage conditions, extending field reliability beyond 24 months. |
Use Scenario: DIN-rail mounted remote I/O unit with isolated 24V DC input converted to 3.3V for microcontroller and CAN transceiver. IC Role / Device Role / Timing Role: Monitors 3.3V domain and holds system in reset during AC line sags or transient surges on 24V bus. Use Value: Guarantees deterministic recovery after 220ms hold-off, avoiding partial register writes that cause watchdog timeouts or CAN bus desynchronization. |
| Medical Point-of-Care Analyzer | Automotive Telematics Gateway |
|
Use Scenario: Portable blood glucose meter with dual Li-ion cells and integrated display driver. IC Role / Device Role / Timing Role: Supervises 2.9V LDO output feeding the display controller and touch interface ASIC. Use Value: Ensures display initialization completes before UI firmware loads, eliminating blank-screen failures during clinical use. |
Use Scenario: Cellular-connected vehicle diagnostics module operating from automotive 12V battery with wide-input buck converter. IC Role / Device Role / Timing Role: Detects 2.9V rail collapse during engine cranking (battery dip to 6V) and asserts reset to prevent modem firmware corruption. Use Value: Maintains cellular registration state across repeated cranking events, reducing network re-attach latency by >800ms per ignition cycle. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803EA29DBZR | 2.9V threshold, 350ms timeout, 0.5µA ICC, SOT23-3 | Longer reset hold time unsuitable for fast-boot MCUs; lower ICC benefits ultra-long-life meters | Select when >300ms firmware initialization is required and sub-1µA quiescent current is critical |
| MAX809SEUR+T | 2.93V threshold, 140ms timeout, 12µA ICC, SOT23-3 | Higher supply current limits battery life; tighter 2.93V spec suits legacy 3.0V systems with marginal margin | Choose only if existing board layout uses MAX809 footprint and 2.93V tolerance is mandated by legacy spec |
Compared with TLV803EA29DBZR and MAX809SEUR+T, the APX803L-29SA-7 offers optimal balance of 220ms timing alignment with modern MCU boot sequences, 1µA ICC for multi-year battery operation, and ±1.5% threshold accuracy - making it the preferred choice for new designs targeting industrial and medical edge devices.
Availability
APX803L-29SA-7 is available at Aetrix Electronics and suitable for smart wearable sensor nodes, industrial PLC I/O modules, and medical point-of-care analyzers requiring stable component supply across multi-year production cycles.
Supply support for APX803L-29SA-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 compliant with AEC-Q200.
The APX803L series belongs to Diodes' Power Management portfolio, engineered specifically for high-accuracy, ultra-low-power supervision in space-constrained, battery-operated, and mission-critical embedded systems.
FAQ
What is the exact reset threshold voltage for APX803L-29SA-7?
The APX803L-29SA-7 has a factory-trimmed reset threshold of 2.9V with ±1.5% accuracy (2.857V to 2.943V at +25°C), confirmed in Electrical Characteristics Table of DS38171 Rev. 3–2. This value is fixed and non-adjustable, matching the "29" suffix in the part number.
Does APX803L-29SA-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 (typically 4.7kΩ to 10kΩ connected to the monitored logic rail, e.g., 3.3V or 1.8V) is mandatory to establish a valid high state when not asserted. No internal pull-up exists.
Can APX803L-29SA-7 operate with a 1.8V supply rail?
No - the APX803L-29SA-7 requires minimum 0.9V on VCC to function, but its 2.9V detection threshold means it cannot supervise rails below 2.9V. It is intended to monitor 3.0V, 3.3V, or 5.0V domains, not sub-2.9V logic supplies.
Is APX803L-29SA-7 qualified for automotive applications?
The APX803L-29SA-7 itself is not AEC-Q100 qualified; however, Diodes offers automotive-grade variants (e.g., APX803L20-29SR-AU) in the same family. For automotive use, contact Diodes directly for PPAP-capable, IATF 16949-manufactured versions with full change control.
APX803L-29SA-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:
- 2.9V
- 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-29SA-7 FAQ
1.How can I place an order for APX803L-29SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803L-29SA-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-29SA-7 reliable?
The price and inventory of APX803L-29SA-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-29SA-7 is usually 5 days.
3.What payment methods are accepted for APX803L-29SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L-29SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803L-29SA-7?
APX803L-29SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803L-29SA-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-29SA-7?
For technical support, including APX803L-29SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L-29SA-7 requirements.
6.How does Aetrix verify that APX803L-29SA-7 is sourced from the original manufacturer or authorized distributors?
All APX803L-29SA-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-29SA-7 meets industry standards.
7.What is the process for return or replacement of APX803L-29SA-7?
All APX803L-29SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L-29SA-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-29SA-7 part is unused and in its original packaging.
Return procedure for APX803L-29SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
APX803L-29SA-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…
