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Diodes Incorporated APX809S00-46SA-7
- Part No.:
- APX809S00-46SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX809S00-46SA-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,855
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Product details
Overview
APX809S00-46SA-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory functions in 5V digital systems. It provides active-low push-pull reset assertion when VCC falls below 4.63V (typ), maintains reset for ≥240ms after VCC recovery, and guarantees valid output down to VCC = 1V. Its 7µA supply current and SOT23-3 package make it suitable for battery-powered controllers and portable instrumentation.
For engineers reviewing the APX809S00-46SA-7 datasheet, APX809S00-46SA-7 pinout, APX809S00-46SA-7 application, or APX809S00-46SA-7 equivalent, key selection criteria include reset threshold accuracy (±0.06V over temperature), guaranteed operation at 1V supply, 240ms minimum timeout, and compatibility with +5V logic interfaces requiring clean power-on reset sequencing.
Technical Context
This device implements a precision bandgap-based voltage comparator with hysteresis-free threshold detection and an internal timer circuit that enforces a fixed 240ms (typ) reset pulse width after VCC exceeds the trip point. The comparator input is directly tied to VCC, eliminating external resistive dividers.
The push-pull output stage drives RESET low actively during fault conditions and pulls high via internal transistor (not weak pull-up) when released, enabling direct interface with µP reset inputs without external pull-up resistors. Output logic state is guaranteed correct for VCC ≥ 1V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V (typ), ±0.06V max deviation across -40°C to +125°C - ensures reliable 5V system monitoring without margin loss |
| Reset Timeout | 240ms (typ), 140–280ms min–max - meets JEDEC JESD8-12B power-on reset duration requirements |
| Supply Current | 7µA (typ), ≤16µA (max) at +25°C - enables multi-year operation on coin-cell batteries |
| VCC Operating Range | 1.0V to 5.5V - supports reset assertion even during brown-out or deep discharge conditions |
| Output Type | Active-low push-pull - eliminates need for external pull-up resistor and reduces board space |
| Temperature Range | -40°C to +125°C - qualified for industrial and automotive under-hood environments |
| Threshold Drift | 30ppm/°C - limits total drift to <1% over full temperature range, critical for stable reset timing |
Pinout & Package
APX809S00-46SA-7 is housed in a RoHS-compliant, halogen-free SOT23-3 (SA) package with 1.3mm pitch, 2.4mm × 1.3mm footprint, and 1.0mm height - optimized for high-density PCB layouts and reflow-compatible assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference | Return path for internal comparator and output driver; must be connected to system ground plane for noise immunity |
| 2 (RESET) | Active-low reset output | Push-pull driver sinks up to 3.2mA or sources 50µA; asserts low during undervoltage, releases high when VCC > 4.63V |
| 3 (VCC) | Supply input | Monitored power rail input; also powers internal circuitry; no external decoupling required but 100nF recommended |
Key Features
| Feature | Design Value |
|---|---|
| Precision 4.63V threshold | Guaranteed 4.57–4.69V over temperature - eliminates calibration and supports 5% tolerance 5V rails |
| No external components | Self-contained detection and timing - reduces BOM count, layout area, and qualification effort |
| 1V minimum operating voltage | Valid RESET assertion down to VCC = 1V - ensures fail-safe behavior during deep brown-out or battery depletion |
| Push-pull active-low output | Drives µP reset pin directly without pull-up resistor - improves noise immunity and simplifies routing |
| Green SOT23 package | Lead-free, Br/Sb-free molding compound - satisfies IPC-1752a Class 2 reporting and EU RoHS 3 compliance |
Applications
| Industrial PLC Controllers | Portable Medical Monitors |
|---|---|
Use Scenario: Power-up sequence in DIN-rail mounted programmable logic controllers where 5V auxiliary supply must stabilize before firmware execution. IC Role / Device Role / Timing Role: Voltage supervisor asserting active-low reset to ARM Cortex-M7 microcontroller until 5V rail reaches 4.63V and remains stable for ≥240ms. Use Value: Prevents spurious boot attempts during slow-rising 5V supplies caused by bulk capacitor charging, ensuring deterministic firmware initialization. |
Use Scenario: Battery-powered ECG monitor with Li-ion cell discharging from 4.2V to 3.0V, requiring reliable reset if main 5V DC-DC output dips during load transients. IC Role / Device Role / Timing Role: Monitors 5V DC-DC output rail; asserts RESET when voltage drops below 4.63V, holding for 240ms to prevent MCU lockup during brief line sag. Use Value: Maintains data integrity during transient undervoltage events without requiring software watchdog intervention or external RC timing networks. |
| Smart Energy Meters | Automotive Body Control Modules |
Use Scenario: Revenue-grade electricity meter with isolated 5V supply derived from mains, subject to surges and sags per IEC 61000-4-11. IC Role / Device Role / Timing Role: Supervises 5V logic rail; generates clean reset pulse only after sustained recovery above 4.63V, rejecting sub-20µs noise spikes on VCC. Use Value: Eliminates false resets from ESD or fast transients while guaranteeing reset during sustained sags >10ms - meeting IEC 62053-21 immunity requirements. |
Use Scenario: Under-hood body control unit powered by vehicle battery (9–16V), regulating 5V for microcontroller and CAN transceivers. IC Role / Device Role / Timing Role: Detects 5V regulator failure or input brown-out; asserts hardware reset to prevent CAN bus arbitration errors or EEPROM corruption. Use Value: Enables fail-safe shutdown before microcontroller executes undefined instructions due to marginal supply - critical for ASIL-B functional safety compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809SEUR+T | 4.63V threshold, 240ms timeout, but 1.2µA supply current (lower) and SOT23-3 package | Higher accuracy (±1.5%) but requires external pull-up for open-drain output - adds component and routing overhead | Select when ultra-low quiescent current dominates over board space and BOM simplicity |
| TPS3808G33DBVR | 3.3V threshold (not 4.63V); adjustable via external resistor; 200ms min timeout; 1.1µA IQ | Requires external resistor network for 4.63V setting; lacks guaranteed 1V operation - invalid below 1.8V | Choose only if design already uses TPS3808 family and can tolerate redesign for threshold tuning and higher minimum VCC |
Compared with MAX809SEUR+T and TPS3808G33DBVR, APX809S00-46SA-7 delivers identical threshold and timeout with push-pull output - reducing component count and enabling direct µP interface - while maintaining robust 1V operation critical for brown-out resilience.
Availability
APX809S00-46SA-7 is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical monitors, and smart energy meters requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for APX809S00-46SA-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 manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability power management, signal integrity, and protection solutions for industrial, computing, and automotive markets.
The APX809S/810S series targets cost-sensitive, space-constrained µP supervisory applications where precision threshold, low IQ, and minimal external components are essential - particularly in portable and battery-operated equipment.
FAQ
What is the exact reset threshold voltage and its tolerance over temperature?
The APX809S00-46SA-7 has a nominal reset threshold of 4.63V (typ), with a guaranteed range of 4.57V to 4.69V at +25°C. Over the full operating temperature range (-40°C to +125°C), the maximum deviation is ±0.06V, corresponding to a temperature coefficient of 30ppm/°C.
Does this device require an external pull-up resistor on the RESET pin?
No. The APX809S00-46SA-7 features a push-pull output stage that actively drives RESET low during undervoltage and actively pulls it high when released. This eliminates the need for an external pull-up resistor, reducing component count and improving noise immunity in high-EMI environments.
Can APX809S00-46SA-7 operate reliably when VCC drops below 2.0V?
Yes. The device guarantees correct RESET logic state (low during fault, high when released) for VCC as low as 1.0V. This allows it to assert reset during deep brown-out conditions and remain functional even as the 5V rail collapses - a key differentiator versus competitors requiring ≥1.8V minimum.
How does the 240ms reset timeout behave during repeated voltage dips?
The reset timeout is re-triggered each time VCC falls below the 4.63V threshold. If VCC recovers above threshold but dips again before the 240ms period completes, the timer resets and begins anew. This ensures continuous reset assertion during unstable supply conditions, preventing premature release.
APX809S00-46SA-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:
- 4.63V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 1ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
APX809S00-46SA-7 FAQ
1.How can I place an order for APX809S00-46SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX809S00-46SA-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 APX809S00-46SA-7 reliable?
The price and inventory of APX809S00-46SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX809S00-46SA-7 is usually 5 days.
3.What payment methods are accepted for APX809S00-46SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX809S00-46SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX809S00-46SA-7?
APX809S00-46SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX809S00-46SA-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 APX809S00-46SA-7?
For technical support, including APX809S00-46SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX809S00-46SA-7 requirements.
6.How does Aetrix verify that APX809S00-46SA-7 is sourced from the original manufacturer or authorized distributors?
All APX809S00-46SA-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 APX809S00-46SA-7 meets industry standards.
7.What is the process for return or replacement of APX809S00-46SA-7?
All APX809S00-46SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX809S00-46SA-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 APX809S00-46SA-7 part is unused and in its original packaging.
Return procedure for APX809S00-46SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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