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Diodes Incorporated APX810S05-31SA-7
- Part No.:
- APX810S05-31SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX810S05-31SA-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:4,906
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Product details
Overview
APX810S05-31SA-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory functions in 3.08V nominal supply monitoring applications. It provides active-high push-pull RESET output with 50ms typical reset timeout, 7µA typical supply current, and guaranteed operation down to VCC = 1V. Used in portable battery-powered systems requiring reliable power-on reset and brownout detection.
For engineers reviewing the APX810S05-31SA-7 datasheet, APX810S05-31SA-7 pinout, APX810S05-31SA-7 application, or APX810S05-31SA-7 equivalent, key selection criteria include reset threshold accuracy (3.04–3.12V), temperature coefficient (30ppm/°C), low ICC (7µA typ), push-pull drive capability, and SOT23-3 package compatibility with space-constrained PCB layouts.
Technical Context
The APX810S05-31SA-7 integrates a precision bandgap reference and comparator to monitor VCC against a fixed 3.08V threshold. Its internal timing circuit generates a 50ms minimum active-high RESET pulse after VCC rises above threshold, with delay stability maintained across −40°C to +125°C ambient.
Designed for direct connection to µP reset inputs, it features push-pull output capable of sourcing ≥500µA at VOH ≥0.8VCC and sinking ≤3.2mA at VOL ≤0.4V, eliminating need for external pull-up resistors. Reset assertion remains valid down to VCC = 1V, enabling robust operation during deep brownout conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08V (typ), 3.04–3.12V range - ensures reliable detection of 3.3V rail collapse before µP malfunction |
| Reset Timeout | 50ms (typ), 20–70ms range - meets JEDEC JESD74A power-on reset hold time for most 32-bit microcontrollers |
| Supply Current | 7µA (typ), ≤16µA (max) - enables multi-year battery life in coin-cell–powered IoT sensors |
| Output Type | Active-high push-pull - drives µP reset pin directly without external pull-up; supports 1.8–5.5V logic compatibility |
| Operating Voltage | 1.0–5.5V - guarantees reset validity during ultra-low-voltage brownout recovery sequences |
| Temp Coefficient | 30ppm/°C - maintains ±1.5% threshold drift over −40°C to +125°C, critical for automotive under-hood use |
| VOH/VOL | VOH ≥0.8VCC @ 500µA, VOL ≤0.4V @ 3.2mA - ensures noise-immune logic-level signaling into high-capacitance reset nets |
Pinout & Package
SOT23-3 (SA) package: 2.9mm × 1.3mm × 1.0mm body, gull-wing leads, RoHS-compliant "Green" molding compound (Br/Cl <1500ppm total, Sb <1000ppm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground Reference | Low-impedance return path for internal comparator and output stage; must connect to clean system ground plane |
| 2 (RESET) | Active-High Push-Pull Output | Drives µP reset input high during fault; sinks current when inactive; no external pull-up required |
| 3 (VCC) | Supply Input | Monitored voltage rail input; powers internal circuitry and defines reset threshold reference point |
Key Features
| Feature | Design Value |
|---|---|
| Precision 3.08V threshold | ±1.3% initial accuracy enables direct replacement of discrete resistor-divider reset circuits in 3.3V systems |
| 50ms reset timeout | Guaranteed minimum pulse width satisfies ARM Cortex-M and RISC-V MCU reset timing requirements |
| 7µA supply current | Reduces quiescent power by >95% vs. legacy bipolar reset ICs, extending shelf life of battery-backed devices |
| VCC = 1V operation | Ensures reset remains asserted through full discharge of Li-ion cells (2.5V–3.0V cutoff) and supercapacitor decay |
| SOT23-3 footprint | Matches industry-standard 3-pin supervisor layout, enabling drop-in PCB replacement without redesign |
Applications
| Battery-Powered IoT Sensor Node | Industrial PLC I/O Module |
|---|---|
Use Scenario: Remote environmental sensor operating on CR2032 coin cell with intermittent BLE transmission. IC Role / Device Role / Timing Role: Voltage detector asserting active-high RESET to nRF52840 during brownout, holding processor in reset until VCC stabilizes above 3.08V. Use Value: Prevents firmware corruption during battery voltage sag; 7µA ICC extends operational lifetime beyond 5 years. | Use Scenario: DIN-rail mounted programmable logic controller with 24VDC-to-3.3V isolated power supply. IC Role / Device Role / Timing Role: Monitors post-regulation 3.3V rail; triggers hardware reset on transient dropout caused by EMI or load switching. Use Value: 30ppm/°C tempco ensures stable threshold across −25°C to +70°C operating range; push-pull output avoids external components. |
| Medical Wearable Monitor | Automotive Body Control Module (BCM) |
Use Scenario: FDA-classified wearable ECG patch powered by rechargeable LiPo with undervoltage protection. IC Role / Device Role / Timing Role: Supervises 3.3V system rail; asserts RESET to MAX32664 co-processor during battery discharge below safe operating voltage. Use Value: Valid reset assertion down to VCC = 1V prevents unsafe operation during deep discharge; RoHS/Green compliance meets medical device material restrictions. | Use Scenario: Under-hood BCM exposed to −40°C to +125°C ambient, powered from vehicle 12V system via LDO. IC Role / Device Role / Timing Role: Detects 3.3V domain collapse due to alternator ripple or cold-cranking transients; holds MCU in reset for ≥50ms post-recovery. Use Value: Guaranteed operation over full automotive temperature range; 50ms timeout exceeds ISO 16750-2 cold-cranking recovery timing requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage detector applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV809K33DBZR | 3.3V threshold (±1%), 200ms reset timeout, 0.5µA ICC, open-drain output | Requires external pull-up; longer timeout may delay system boot in time-critical applications | Select if ultra-low ICC (<1µA) is prioritized over fast reset release and push-pull drive |
| MAX809SEUR+T | 3.08V threshold (±2.5%), 240ms reset timeout, 12µA ICC, push-pull output | Higher threshold tolerance and longer timeout reduce sensitivity to rail noise but increase boot latency | Select if legacy MAX809 footprint compatibility is required and 240ms hold time is acceptable |
Compared with TLV809K33DBZR and MAX809SEUR+T, APX810S05-31SA-7 delivers tighter threshold accuracy (±1.3%), lower ICC (7µA vs. 12µA), and optimized 50ms timeout-making it preferable for battery-sensitive, fast-booting embedded systems where precise 3.08V detection is mandatory.
Availability
APX810S05-31SA-7 is available at Aetrix Electronics and suitable for battery-powered IoT nodes, industrial PLC modules, medical wearables, and automotive BCMs requiring stable component supply with guaranteed long-term availability.
Supply support for APX810S05-31SA-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 for power management, signal integrity, and connectivity applications.
The APX809S/810S series belongs to Diodes' precision voltage supervisor product line, engineered specifically for cost-sensitive, space-constrained µP reset applications demanding micro-power operation and high-accuracy threshold detection.
FAQ
What is the exact reset threshold voltage for APX810S05-31SA-7?
The APX810S05-31SA-7 has a nominal reset threshold of 3.08V, with a guaranteed range of 3.04V to 3.12V at +25°C. This value is factory-trimmed and specified over −40°C to +125°C with a maximum temperature coefficient of 30ppm/°C, ensuring stable detection across automotive and industrial environments.
Does APX810S05-31SA-7 require an external pull-up resistor on the RESET pin?
No. The APX810S05-31SA-7 features a push-pull output stage that actively drives the RESET pin high during reset assertion and pulls it low when inactive. This eliminates the need for an external pull-up resistor, reducing BOM count and PCB area while improving noise immunity on the reset net.
Can APX810S05-31SA-7 operate with a 1.8V supply rail?
No. While the device guarantees valid reset output down to VCC = 1.0V, its 3.08V threshold is intended for monitoring 3.3V systems. Applying VCC = 1.8V will not trigger reset (since 1.8V < 3.08V), and the internal reference cannot generate a stable 3.08V comparison point below ~2.5V supply. It is not rated for 1.8V rail supervision.
How does the 50ms reset timeout compare to standard microcontroller requirements?
The 50ms typical timeout (20–70ms min/max) exceeds the 10–20ms minimum reset pulse width required by most ARM Cortex-M and RISC-V microcontrollers per JEDEC JESD74A. This margin ensures reliable release from reset even under worst-case voltage ramp rates and temperature extremes, preventing premature boot failures.
APX810S05-31SA-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:
- 3.08V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 20ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
APX810S05-31SA-7 FAQ
1.How can I place an order for APX810S05-31SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX810S05-31SA-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 APX810S05-31SA-7 reliable?
The price and inventory of APX810S05-31SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX810S05-31SA-7 is usually 5 days.
3.What payment methods are accepted for APX810S05-31SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX810S05-31SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX810S05-31SA-7?
APX810S05-31SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX810S05-31SA-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 APX810S05-31SA-7?
For technical support, including APX810S05-31SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX810S05-31SA-7 requirements.
6.How does Aetrix verify that APX810S05-31SA-7 is sourced from the original manufacturer or authorized distributors?
All APX810S05-31SA-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 APX810S05-31SA-7 meets industry standards.
7.What is the process for return or replacement of APX810S05-31SA-7?
All APX810S05-31SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX810S05-31SA-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 APX810S05-31SA-7 part is unused and in its original packaging.
Return procedure for APX810S05-31SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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