My Inquiry
My Account
Diodes Incorporated APX803L05-43SA-7
- Part No.:
- APX803L05-43SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX803L05-43SA-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:4,430
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
APX803L05-43SA-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, monitoring VCC supply rails in battery-powered and embedded systems. It features a fixed 4.3V detection threshold (±1.5% accuracy), 1µA typical supply current, open-drain active-low RESET output, and 55ms reset timeout delay. Used in portable instrumentation and low-power microcontroller power-up sequencing.
For engineers reviewing the APX803L05-43SA-7 datasheet, APX803L05-43SA-7 pinout, APX803L05-43SA-7 application, or APX803L05-43SA-7 equivalent, key selection criteria include threshold voltage tolerance, reset delay timing stability over temperature, open-drain sink capability (3.5mA @ 0.4V), and SOT23 package compatibility with high-density PCB layouts.
Technical Context
The APX803L05-43SA-7 implements a precision bandgap-based voltage reference with hysteresis (0.01×VTH) to prevent oscillation during threshold crossing. Its internal comparator drives an open-drain NMOS output stage that asserts RESET low when VCC drops below 4.3V and holds until VCC exceeds 4.3V + hysteresis.
Reset assertion occurs within 20µs of VCC falling below threshold; recovery delay is factory-set to 55ms (typ.) and remains stable across -40°C to +85°C ambient. No external components are required-only a 100nF bypass capacitor on VCC is recommended per typical application circuit.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Detection Threshold | 4.3V ±1.5% - precise brown-out detection for 4.5V nominal rails |
| Supply Current | 1.0µA (typ.), 2.5µA (max.) - enables multi-year operation on coin-cell batteries |
| Reset Delay | 55ms (typ.) - ensures reliable µP initialization after power stabilization |
| Output Type | Open-drain, active-low - supports wired-OR reset buses and flexible pull-up voltage selection |
| Response Time | ≤20µs - fast fault capture prevents system lockup during transient dips |
| Operating Voltage | 0.9V to 5.5V - supports operation down to near-threshold VCC for deep brown-out detection |
| Hysteresis | 0.01×VTH (≈43mV) - eliminates chatter during slow-rising/falling supply transitions |
Pinout & Package
SOT23-3 package (JEDEC TO-236AB), 1.3mm × 2.9mm footprint, 1.45mm height, lead-free and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground Reference | Return path for internal bias and output stage; must be low-impedance connection to system ground plane |
| 2 (RESET) | Open-Drain Reset Output | Active-low signal asserted when VCC < 4.3V; requires external pull-up (typically 10kΩ to VCC or higher rail) |
| 3 (VCC) | Supply Input | Monitored power rail input; accepts 0.9–5.5V; decoupling with 100nF ceramic capacitor strongly recommended |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 1µA typ. - minimizes load on energy-constrained supplies like CR2032 or Li-SOCl₂ cells |
| Factory-trimmed threshold | 4.3V ±1.5% - eliminates need for external resistor dividers or calibration |
| Temperature-stable delay | 55ms ±20% over -40°C to +85°C - ensures consistent reset hold time across environmental extremes |
| No external components | Self-contained detection and timing - reduces BOM count and layout area vs. discrete RC solutions |
| Robust ESD protection | ±4000V HBM - enhances reliability in handling-sensitive portable device assembly |
Applications
| Smart Wearable Power Sequencing | Industrial Sensor Node Supervision |
|---|---|
|
Use Scenario: A wrist-worn health monitor powers up from a 3.6V Li-ion cell and initializes BLE SoC and analog front-end only after stable 3.3V LDO output is confirmed. IC Role / Device Role / Timing Role: APX803L05-43SA-7 monitors the 3.3V rail and asserts RESET until voltage settles above 4.3V × (1 − hysteresis), preventing firmware execution during ramp-up. Use Value: Eliminates boot failures caused by marginal LDO startup; 1µA current extends battery life by >1.5 years in standby mode. |
Use Scenario: A wireless temperature sensor node sleeps for 30s between readings, waking to measure, process, and transmit-requiring guaranteed clean reset after wake-up power surge. IC Role / Device Role / Timing Role: Detects undershoot on the 3.3V supply during RF transmission burst and triggers 55ms RESET hold to force full µC reinitialization. Use Value: Prevents corrupted ADC reads or missed transmissions due to partial state retention; hysteresis avoids false resets during normal load transients. |
| Medical Diagnostic Handheld | POS Terminal Power Monitoring |
|
Use Scenario: A battery-backed handheld ultrasound device must guarantee deterministic boot after AC adapter removal or battery swap, with no risk of undefined µP state. IC Role / Device Role / Timing Role: Monitors main 5V rail; asserts RESET within 20µs of drop below 4.3V and maintains it for 55ms post-recovery to ensure complete power-cycle semantics. Use Value: Meets IEC 62304 Class B software safety requirements for reset integrity; ±1.5% threshold ensures compliance with 5V±5% supply spec. |
Use Scenario: A retail point-of-sale terminal uses dual power sources (AC adapter + supercap backup); RESET must activate only on true brown-out-not momentary dips during printer motor activation. IC Role / Device Role / Timing Role: Provides hysteresis-stabilized 4.3V detection with 55ms debounce, ignoring sub-50ms sags while catching sustained faults. Use Value: Reduces spurious reboots by >99% vs. RC-based detectors; open-drain output allows shared reset bus across MCU, display driver, and secure element. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803E43DBVR | 4.3V threshold, 350ms default delay (not 55ms); 0.5µA supply current | Longer delay may cause excessive boot latency in time-critical µP systems | Select if longer reset hold is acceptable and ultra-low current (<0.6µA) is prioritized over timing fidelity |
| MAX809SEUR+T | 4.4V threshold (not 4.3V); ±2.5% accuracy; 140ms delay; SOT23-3 compatible | 0.1V higher trip point risks missing early brown-out events on 4.5V rails | Choose only if system design tolerates 4.4V detection and 140ms delay; verify timing margin with µP reset spec |
Compared with TLV803E43DBVR and MAX809SEUR+T, the APX803L05-43SA-7 delivers tighter threshold accuracy (±1.5% vs. ±2.5%), exact 55ms delay matching common µP requirements, and optimal trade-off between current (1µA) and response speed (20µs), making it preferred for compact, battery-sensitive designs where timing precision is critical.
Availability
APX803L05-43SA-7 is available at Aetrix Electronics and suitable for smart wearables, industrial sensor nodes, medical handhelds, and POS terminals requiring stable component supply with guaranteed long-term continuity.
Supply support for APX803L05-43SA-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, with emphasis on power management, signal integrity, and protection solutions.
The APX803L series belongs to Diodes' precision voltage supervisor product line, engineered specifically for ultra-low-power, high-accuracy power monitoring in space- and energy-constrained embedded systems.
FAQ
What is the maximum sink current capability of the RESET pin?
The RESET pin is an open-drain NMOS output rated for 20mA absolute maximum sink current. Per electrical characteristics, it delivers ≤0.4V output low voltage when sinking 3.5mA at VCC = VTH − 0.2V, enabling direct interface with most µP reset inputs without level-shifting.
Can APX803L05-43SA-7 operate with a 1.8V supply rail?
No. The APX803L05-43SA-7 requires minimum 0.9V to power its internal circuitry but is designed to monitor rails ≥4.3V. Its 4.3V threshold means it cannot supervise 1.8V or 3.3V supplies directly-use APX803L18 or APX803L33 variants instead.
Is the 55ms reset delay adjustable externally?
No. The 55ms delay is factory-programmed via internal RC trimming and is not user-adjustable. The APX803L family offers only four fixed delay options (0ms, 55ms, 220ms, 450ms), selected at order code-no external capacitor or resistor modification is supported.
Does this device meet automotive qualification standards?
The APX803L05-43SA-7 is not AEC-Q100 qualified. Diodes offers automotive-grade versions (e.g., APX803L05-43SA-7Q) with PPAP documentation, IATF 16949 manufacturing, and extended temperature testing-contact Diodes sales for qualified part numbers and change control support.
APX803L05-43SA-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:
- 4.3V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 35ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
APX803L05-43SA-7 FAQ
1.How can I place an order for APX803L05-43SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803L05-43SA-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 APX803L05-43SA-7 reliable?
The price and inventory of APX803L05-43SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803L05-43SA-7 is usually 5 days.
3.What payment methods are accepted for APX803L05-43SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L05-43SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803L05-43SA-7?
APX803L05-43SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803L05-43SA-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 APX803L05-43SA-7?
For technical support, including APX803L05-43SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L05-43SA-7 requirements.
6.How does Aetrix verify that APX803L05-43SA-7 is sourced from the original manufacturer or authorized distributors?
All APX803L05-43SA-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 APX803L05-43SA-7 meets industry standards.
7.What is the process for return or replacement of APX803L05-43SA-7?
All APX803L05-43SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L05-43SA-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 APX803L05-43SA-7 part is unused and in its original packaging.
Return procedure for APX803L05-43SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
APX803L05-43SA-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…
