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Diodes Incorporated APX810S05-31SR-7
- Part No.:
- APX810S05-31SR-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX810S05-31SR-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:1,644
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Product details
Overview
APX810S05-31SR-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory functions in 3.3V digital systems. It provides active-high push-pull reset output with 3.08V threshold, 50ms typical reset timeout, 7µA supply current, and guaranteed operation down to VCC = 1.0V - deployed in battery-powered controllers and portable instrumentation.
For engineers reviewing the APX810S05-31SR-7 datasheet, APX810S05-31SR-7 pinout, APX810S05-31SR-7 application, or APX810S05-31SR-7 equivalent, key selection criteria include reset threshold accuracy (±0.04V), temperature coefficient (30ppm/°C), low-voltage validity (1.0V), push-pull drive capability (1.2mA sink), and SOT23-SR package compatibility with space-constrained PCB layouts.
Technical Context
The APX810S05-31SR-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 immunity to fast transients via built-in noise filtering.
Designed for single-supply operation from 1.0V to 5.5V, it delivers rail-to-rail output logic states: VOH ≥ 0.8×VCC at 500µA source, VOL ≤ 0.4V at 3.2mA sink. The device operates across –40°C to +125°C ambient, with reset threshold drift limited to ±0.5% over temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08V (typical); ensures reliable reset assertion for 3.3V systems during brownout |
| Reset Timeout | 50ms (typical); guarantees sufficient processor initialization time before release |
| Supply Current | 7µA (typical); enables multi-year battery life in always-on monitoring applications |
| Output Type | Push-pull active-high; eliminates external pull-up resistor and reduces BOM count |
| VCC Validity Range | 1.0V to 5.5V; supports reset assertion even during deep discharge or cold-start conditions |
| Temp Coefficient | 30ppm/°C; maintains ±0.5% threshold stability across industrial temperature range |
| ESD Rating | HBM ±6kV; protects against handling damage in automated assembly environments |
Pinout & Package
APX810S05-31SR-7 is housed in a RoHS-compliant, halogen-free SOT23-3 (SR) package with 1.3mm × 2.9mm footprint and 0.95mm height - optimized for high-density portable PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal comparator and output stage; must be low-impedance connection |
| 2 | RESET | Active-high push-pull reset output; drives µP RESET pin directly without external components |
| 3 | VCC | Power supply input; powers internal circuitry and defines reset threshold reference point |
Key Features
| Feature | Design Value |
|---|---|
| Precision 3.08V threshold | ±0.04V tolerance at 25°C ensures accurate detection of 3.3V rail collapse |
| 50ms reset timeout | Guaranteed minimum pulse width meets ARM Cortex-M and PIC MCU reset timing requirements |
| 1.0V VCC operation | Enables valid reset signaling during battery voltage sag below 1.2V LDO dropout |
| No external components | Reduces bill-of-materials cost and layout area versus discrete reset circuits |
| SOT23-SR green package | Lead-free, antimony-free, <900ppm Br/Cl; compliant with RoHS 3 and automotive ELV directives |
Applications
| Battery-Powered Instrumentation | Industrial Microcontroller Supervision |
|---|---|
Use Scenario: Handheld multimeter with Li-ion battery and low-power µC that must retain calibration data during power interruption. IC Role / Device Role / Timing Role: Voltage detector asserts active-high RESET to halt firmware execution and preserve SRAM contents until stable 3.3V rail resumes. Use Value: 7µA quiescent current extends battery life beyond 5 years in sleep mode; 1.0V validity prevents spurious resets during battery recovery. | Use Scenario: Programmable logic controller (PLC) I/O module operating in factory environments with noisy 3.3V supply rails. IC Role / Device Role / Timing Role: Monitors VCC and triggers system-wide reset when voltage dips below 3.08V due to load switching transients. Use Value: 30ppm/°C threshold stability maintains accuracy across –40°C to +85°C operating range; 6kV HBM ESD rating improves field reliability. |
| Embedded Edge Sensor Node | USB-Powered Peripheral Controller |
Use Scenario: Wireless temperature sensor node powered by energy-harvesting circuitry with intermittent 3.3V output. IC Role / Device Role / Timing Role: Ensures clean boot sequence by holding µC in reset until harvested energy stabilizes above 3.08V for ≥50ms. Use Value: Push-pull output eliminates need for external pull-up, reducing component count and leakage paths in ultra-low-power design. | Use Scenario: USB-C audio adapter with integrated DAC and 3.3V LDO supplying digital core logic. IC Role / Device Role / Timing Role: Detects LDO output collapse during USB port negotiation glitches and forces controlled restart. Use Value: 50ms reset pulse exceeds USB 2.0 enumeration timing requirements; SOT23-SR footprint fits tight 8mm × 8mm PCB area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| APX810S05-31SA-7 | SOT23-3 (SA) variant with identical electrical specs but different pinout: Pin 1 = RESET, Pin 2 = GND, Pin 3 = VCC | Requires PCB layout revision; not drop-in compatible with SR footprint | Select SA only when redesigning board for standardized SOT23 pin mapping |
| TPS3808G33DBVR | TI part with 3.3V threshold, 200ms default timeout, higher 12µA ICC, and enable input | Supports programmable delay and external enable control; larger SOT23-6 package | Choose for designs requiring configurable timeout or system-level enable coordination |
Compared with APX810S05-31SA-7, the SR variant offers direct pin compatibility with legacy SOT23 layouts using Pin 1 = GND; versus TPS3808G33DBVR, it trades configurability for lower ICC and smaller footprint - ideal for cost-sensitive, space-constrained 3.3V supervisors.
Availability
APX810S05-31SR-7 is available at Aetrix Electronics and suitable for battery-powered instrumentation, industrial microcontroller supervision, and embedded edge sensor nodes requiring stable component supply and long-term lifecycle support.
Supply support for APX810S05-31SR-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 consumer markets.
The APX809S/810S series belongs to Diodes' µP supervisory product line, engineered specifically for low-cost, low-power reset generation in 1.0V–5.5V digital systems where minimal BOM count and guaranteed voltage validity are critical.
FAQ
What is the exact reset threshold voltage for APX810S05-31SR-7?
The APX810S05-31SR-7 has a nominal reset threshold of 3.08V at +25°C, with guaranteed min/max values of 3.04V and 3.12V respectively. This value is laser-trimmed during production and exhibits ±0.5% variation over the full –40°C to +125°C operating range due to its 30ppm/°C temperature coefficient.
Can APX810S05-31SR-7 operate with a 1.8V supply?
Yes - APX810S05-31SR-7 functions correctly with VCC as low as 1.0V, including at 1.8V. However, its 3.08V reset threshold means it will assert RESET continuously when supplied from 1.8V, since VCC never exceeds VTH. It is intended for monitoring 3.3V rails, not powering from sub-threshold voltages.
Does this device require an external capacitor for reset timing?
No. APX810S05-31SR-7 uses an internal RC timing network to generate its 50ms reset timeout - no external capacitor is needed. This eliminates timing drift due to capacitor tolerance/aging and reduces PCB area versus discrete RC-based supervisors.
Is the RESET output truly push-pull, and what are its drive strengths?
Yes - the RESET pin is a true push-pull output. It sources up to 500µA while maintaining VOH ≥ 0.8×VCC, and sinks up to 3.2mA while holding VOL ≤ 0.4V. This allows direct interfacing with standard CMOS inputs without pull-up resistors, supporting fan-out to multiple µP reset pins in some configurations.
APX810S05-31SR-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
APX810S05-31SR-7 FAQ
1.How can I place an order for APX810S05-31SR-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX810S05-31SR-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 APX810S05-31SR-7 reliable?
The price and inventory of APX810S05-31SR-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX810S05-31SR-7 is usually 5 days.
3.What payment methods are accepted for APX810S05-31SR-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX810S05-31SR-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX810S05-31SR-7?
APX810S05-31SR-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX810S05-31SR-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 APX810S05-31SR-7?
For technical support, including APX810S05-31SR-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX810S05-31SR-7 requirements.
6.How does Aetrix verify that APX810S05-31SR-7 is sourced from the original manufacturer or authorized distributors?
All APX810S05-31SR-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 APX810S05-31SR-7 meets industry standards.
7.What is the process for return or replacement of APX810S05-31SR-7?
All APX810S05-31SR-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX810S05-31SR-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 APX810S05-31SR-7 part is unused and in its original packaging.
Return procedure for APX810S05-31SR-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
APX810S05-31SR-7 Tags
-
MIC826SYMT-TR
Microchip Technology
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APX803S-31SA-7
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