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Diodes Incorporated APX803L05-34SA-7
- Part No.:
- APX803L05-34SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX803L05-34SA-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:3,388
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Product details
Overview
APX803L05-34SA-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, providing precise 3.4V threshold detection with ±1.5% accuracy, 1µA typical supply current, open-drain active-low reset output, and 55ms reset timeout delay. It monitors VCC in battery-powered embedded systems such as portable medical devices, IoT edge sensors, and low-power microcontroller units.
For engineers reviewing the APX803L05-34SA-7 datasheet, APX803L05-34SA-7 pinout, APX803L05-34SA-7 application, or APX803L05-34SA-7 equivalent, this device delivers verified low-current supervision with fixed internal threshold, fast 20µs reset assertion, and SOT23-3 package compatibility for space-constrained PCB layouts.
Technical Context
The APX803L05-34SA-7 implements a precision bandgap-based voltage reference with hysteresis (0.01×VTH) to prevent oscillation during power-up/down transitions. Its internal comparator continuously monitors VCC against a factory-trimmed 3.4V threshold and asserts RESET when VCC drops below that level.
Reset remains active until VCC exceeds the release voltage (VTH_H = VTH_L + VHYS), then holds for the selected 55ms timeout before releasing - a fixed delay implemented via on-chip RC timing, independent of external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Threshold Voltage | 3.4V ±1.5% - factory-trimmed fixed detection level, eliminating need for external resistor divider |
| Supply Current | 1.0µA typical - enables multi-year operation from coin-cell batteries in always-on monitoring applications |
| Reset Timeout Delay | 55ms - ensures stable processor initialization after brown-out recovery without external timing capacitor |
| Reset Response Time | 20µs - guarantees rapid fault detection and system halt before logic corruption occurs |
| Output Type | Open-drain, active-low - supports wired-OR reset bus architectures and flexible pull-up voltage selection (up to 5.5V) |
| Operating Voltage Range | 0.9V to 5.5V - supports supervision of 1.2V–3.3V logic rails and wide-input PMIC outputs |
| Temperature Range | -40°C to +85°C - qualified for industrial-grade embedded environments including automotive cabin electronics |
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 circuitry; must be connected directly to system ground plane for accurate threshold stability |
| 2 (RESET) | Open-Drain Reset Output | Active-low signal asserted when VCC < 3.4V; requires external pull-up to define logic-high level and sink capability |
| 3 (VCC) | Supply Input | Powers internal reference and comparator; also the monitored rail - no separate sense input required |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Internal voltage reference, comparator, and timing network eliminate BOM cost and layout area for discrete supervision circuits |
| High threshold accuracy | ±1.5% over temperature ensures reliable reset assertion across -40°C to +85°C without calibration |
| Ultra-low quiescent current | 1.0µA typ. enables integration into energy-harvesting nodes where µA-level leakage is critical |
| Fast reset assertion | 20µs response time prevents metastability in high-speed µP clock domains during supply dips |
| Multiple delay options | 55ms timeout matches common µP reset hold requirements for flash memory initialization sequences |
Applications
| Portable ECG Monitors | Smart Home Sensor Nodes |
|---|---|
Use Scenario: Continuous battery-powered acquisition of biopotential signals with real-time anomaly detection. IC Role / Device Role / Timing Role: Voltage supervisor ensuring MCU resets cleanly upon Li-ion cell voltage sag below 3.4V during peak transmit bursts. Use Value: Prevents corrupted ADC sampling or firmware lockup by enforcing deterministic restart before analog front-end bias drifts. |
Use Scenario: Zigbee/Thread-enabled temperature/humidity sensor operating on CR2032 coin cell for 5+ years. IC Role / Device Role / Timing Role: Power-on and brown-out detector triggering controlled shutdown and non-volatile state save prior to deep sleep entry. Use Value: Eliminates data loss during gradual battery depletion by asserting reset at precisely 3.4V, matching MCU's minimum operating voltage. |
| Industrial PLC I/O Modules | Automotive Body Control Units |
Use Scenario: DIN-rail mounted remote I/O module powered from 24VDC supply with local 3.3V LDO regulation. IC Role / Device Role / Timing Role: Supervises 3.3V rail feeding FPGA configuration memory and CAN transceiver logic supply. Use Value: Guarantees FPGA reconfiguration only after stable 3.3V is confirmed, avoiding partial bitstream load failures. |
Use Scenario: Door module controlling window lift, mirror fold, and interior lighting using 12V battery input. IC Role / Device Role / Timing Role: Monitors 5V logic rail derived from buck converter; asserts reset during engine cranking-induced dips. Use Value: Enables safe rollback to last-known-good state within 55ms, preventing erratic actuator behavior during cold starts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803EA34DBVR | 3.4V threshold, ±2.5% accuracy, 350nA supply current, 200ms default delay | Lower current but longer fixed delay; requires external capacitor for adjustable timing | Select when ultra-low power dominates timing flexibility; verify 200ms delay aligns with host MCU boot sequence |
| MAX809SEUR+T | 3.4V threshold, ±2.0% accuracy, 12µA supply current, 240ms delay | Higher quiescent current and longer delay; SOT23-3 pinout identical | Choose only if legacy MAX809 footprint compatibility is mandatory and 12µA drain is acceptable |
Compared with TLV803EA34DBVR and MAX809SEUR+T, the APX803L05-34SA-7 offers tighter threshold accuracy (±1.5% vs. ±2.0–2.5%) and lower supply current than MAX809 while retaining the exact 55ms delay needed for modern low-power MCUs - making it optimal for next-generation portable and automotive edge nodes.
Availability
APX803L05-34SA-7 is available at Aetrix Electronics and suitable for portable medical devices, smart sensor nodes, industrial I/O modules, and automotive body electronics requiring stable component supply with guaranteed long-term manufacturability.
Supply support for APX803L05-34SA-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 design centers across Asia, Europe, and the US and manufacturing in IATF 16949-certified facilities.
The APX803L series belongs to Diodes' precision power management portfolio, engineered specifically for ultra-low-power microprocessor supervision in battery-critical and space-constrained applications.
FAQ
What is the exact reset threshold voltage for APX803L05-34SA-7?
The APX803L05-34SA-7 has a factory-trimmed nominal reset threshold of 3.4V with ±1.5% accuracy over -40°C to +85°C ambient temperature. This value is fixed internally and does not require external resistors or calibration. The hysteresis is 0.01×VTH (34mV), ensuring clean release above 3.434V.
Can APX803L05-34SA-7 monitor a 5V rail?
Yes - the device operates with VCC from 0.9V to 5.5V and monitors that same rail. When used on a 5V system, it asserts reset if the 5V rail drops below 3.4V. Its open-drain output supports pull-up to 5.5V, enabling direct interface with 5V logic without level-shifting.
Is the 55ms reset timeout adjustable?
No - the 55ms delay is fixed and implemented via internal RC timing. The "05" in the part number denotes the 55ms option; other variants offer 0ms, 220ms, or 450ms. No external capacitor or resistor can modify this timing, ensuring consistent behavior across production lots.
Does APX803L05-34SA-7 require a bypass capacitor?
Yes - a 100nF ceramic capacitor between VCC and GND, placed as close as possible to the device pins, is required per the datasheet to suppress high-frequency noise and ensure stable internal reference operation. Omission may cause false resets or delayed assertion.
APX803L05-34SA-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:
- 3.4V
- 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
APX803L05-34SA-7 FAQ
1.How can I place an order for APX803L05-34SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803L05-34SA-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 APX803L05-34SA-7 reliable?
The price and inventory of APX803L05-34SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803L05-34SA-7 is usually 5 days.
3.What payment methods are accepted for APX803L05-34SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L05-34SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803L05-34SA-7?
APX803L05-34SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803L05-34SA-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 APX803L05-34SA-7?
For technical support, including APX803L05-34SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L05-34SA-7 requirements.
6.How does Aetrix verify that APX803L05-34SA-7 is sourced from the original manufacturer or authorized distributors?
All APX803L05-34SA-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 APX803L05-34SA-7 meets industry standards.
7.What is the process for return or replacement of APX803L05-34SA-7?
All APX803L05-34SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L05-34SA-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 APX803L05-34SA-7 part is unused and in its original packaging.
Return procedure for APX803L05-34SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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