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Diodes Incorporated APX810-31SAG-7
- Part No.:
- APX810-31SAG-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX810-31SAG-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
APX810-31SAG-7 from Diodes Incorporated is a 3-pin SOT23 microprocessor supervisory IC with active-high push-pull RESET output, 3.08 V reset threshold (±0.07 V), 200 ms typical reset timeout, and 30 µA supply current. It monitors 3.3 V digital power rails in embedded controllers and portable systems to prevent erroneous code execution during brownout or power-up.
For engineers reviewing the APX810-31SAG-7 datasheet, APX810-31SAG-7 pinout, APX810-31SAG-7 application, or APX810-31SAG-7 equivalent, key selection criteria include reset threshold accuracy (±0.07 V at −40°C to +85°C), guaranteed valid reset assertion down to VCC = 1 V, push-pull drive capability (800 µA source), and SOT23 footprint compatibility for space-constrained PCBs.
Technical Context
The APX810-31SAG-7 integrates a precision voltage comparator with internal reference and a monostable timer to generate a fixed-duration active-high reset pulse. Its reset threshold is trimmed to 3.08 V with ±0.07 V tolerance over −40°C to +85°C and exhibits ≤30 ppm/°C tempco.
It features a push-pull output stage that sources up to 800 µA when high and sinks up to 3.2 mA when low, eliminating external pull-up resistors. The device asserts RESET high only after VCC rises above 3.08 V and sustains it for ≥140 ms (min) - 280 ms (max) - with 200 ms typical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08 V (typ), 3.00–3.15 V (min–max); ensures reliable reset assertion before 3.3 V rail drops below system operational margin |
| Reset Timeout | 200 ms (typ), 140–280 ms (min–max); guarantees sufficient processor initialization time after power stabilization |
| Supply Current | 30 µA (typ) at +25°C; enables battery-powered operation with negligible standby drain |
| Output Type | Push-pull active-high; drives CMOS inputs directly without external pull-up resistor |
| VCC Validity Range | 1.1–5.5 V operating; reset output guaranteed valid down to VCC = 1 V for robust low-voltage detection |
| ESD Protection | 5 kV HBM; withstands handling and board-level electrostatic events without latch-up or damage |
Pinout & Package
SOT23-3 (SA package) surface-mount package with 2.4 mm × 1.3 mm footprint, 0.95 mm height, and thermal resistance θJA = 201°C/W on FR-4 with minimum pad layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Ground reference | Return path for internal comparator and output driver; must be connected to system ground plane for noise immunity |
| RESET | Active-high reset output | Push-pull CMOS output asserted high when VCC ≥ 3.08 V and timeout complete; sinks 3.2 mA max when low |
| VCC | Supply input | Power rail monitoring input; supplies internal bandgap reference and logic; operates from 1.1 V to 5.5 V |
Key Features
| Feature | Design Value |
|---|---|
| Precision reset threshold | 3.08 V ±0.07 V over full temperature range ensures deterministic reset timing across industrial environments |
| No external components required | Integrated reference, comparator, and timer eliminate discrete resistors, capacitors, or RC networks for BOM simplification |
| Guaranteed reset validity to 1 V | Output remains logically defined down to VCC = 1 V, enabling safe reset assertion during deep brownout recovery |
| Low quiescent current | 30 µA typical supply draw extends battery life in portable instrumentation and handheld devices |
Applications
| Industrial PLC Controllers | Portable Medical Monitors |
|---|---|
Use Scenario: Power sequencing in programmable logic controller I/O modules during AC line fluctuations or backup battery switchover. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-high RESET to halt CPU execution until 3.3 V rail stabilizes post-brownout. Use Value: Prevents firmware corruption by ensuring ≥140 ms reset hold time even under −40°C to +85°C ambient conditions. | Use Scenario: Battery-powered ECG monitor entering low-power sleep mode and recovering from brief voltage sag during sensor activation. IC Role / Device Role / Timing Role: Active-high reset generator tied to 3.3 V LDO output, triggering MCU reboot only after stable rail recovery. Use Value: 30 µA supply current minimizes standby drain; push-pull output avoids leakage-induced false wakeups. |
| Smart Energy Meters | Automotive Body Control Modules |
Use Scenario: Voltage supervision of microcontroller supply during utility grid transients or capacitor discharge events. IC Role / Device Role / Timing Role: Precision 3.08 V threshold detector with 200 ms timeout, synchronized to metering SoC power-on sequence. Use Value: Tight ±0.07 V threshold tolerance prevents premature reset release during slow-rising 3.3 V rails in cold-temperature deployments. | Use Scenario: Reset management for infotainment MCU during vehicle ignition cycling and alternator load dump. IC Role / Device Role / Timing Role: Brownout detector monitoring 3.3 V domain derived from automotive DC-DC converter. Use Value: Push-pull output drives heavy capacitive loads (≥100 pF) without rise-time degradation, ensuring clean reset edge integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD2T | 3.08 V threshold, open-drain active-low output, 140 ms min timeout, 1.2 µA supply current | Requires external pull-up; unsuitable where active-high direct-drive is mandatory | Select only if system design accommodates active-low logic and ultra-low current is prioritized over drive strength |
| TPS3808G30DBVR | 3.0 V threshold, adjustable timeout via capacitor, 1.5 µA supply current, enable input | Timeout not fixed; requires external timing capacitor; adds enable control complexity | Choose when programmable delay or enable gating is needed; avoid if fixed 200 ms timeout and minimal BOM are critical |
Compared with MAX809TRD2T and TPS3808G30DBVR, the APX810-31SAG-7 delivers deterministic active-high push-pull drive without external components, making it optimal for cost-sensitive, space-constrained designs requiring guaranteed 3.08 V threshold and fixed 200 ms reset hold time.
Availability
APX810-31SAG-7 is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical monitors, and smart energy meters requiring stable component supply with consistent parametric performance across temperature.
Supply support for APX810-31SAG-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 APX809/810 series was designed specifically for cost-effective, space-efficient microprocessor reset supervision in battery-powered and embedded systems, emphasizing precision threshold stability, low quiescent current, and SOT23 integration.
FAQ
What is the exact reset threshold voltage of APX810-31SAG-7 and its tolerance over temperature?
The APX810-31SAG-7 has a nominal reset threshold of 3.08 V, with a guaranteed range of 3.00 V to 3.15 V over the full operating temperature range of −40°C to +85°C. This specification is confirmed in the DS31322 Rev. 5–3 datasheet Table 1, Electrical Characteristics, under "VTH Reset Threshold APX809/810-31".
Does APX810-31SAG-7 require an external pull-up resistor on the RESET pin?
No. The APX810-31SAG-7 features a push-pull output stage capable of sourcing up to 800 µA and sinking up to 3.2 mA, allowing direct connection to CMOS inputs without external pull-up resistors. This eliminates BOM items and improves noise immunity compared to open-drain alternatives.
Can APX810-31SAG-7 operate reliably below 1.1 V supply voltage?
No. The recommended operating VCC range is 1.1 V to 5.5 V. While the RESET output remains logically valid down to VCC = 1 V, the device is not specified or characterized for operation below 1.1 V. Below this voltage, internal reference and comparator functionality are not guaranteed per datasheet Section 5, Recommended Operating Conditions.
Is APX810-31SAG-7 RoHS compliant and halogen-free?
Yes. APX810-31SAG-7 uses a "Green" molding compound with no bromine, antimony, or lead, meeting EU RoHS Directive 2011/65/EU and halogen-free definitions (<900 ppm Br, <900 ppm Cl, <1000 ppm Sb). This is documented in the datasheet Features section and Notes 1–3.
APX810-31SAG-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:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
APX810-31SAG-7 FAQ
1.How can I place an order for APX810-31SAG-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX810-31SAG-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 APX810-31SAG-7 reliable?
The price and inventory of APX810-31SAG-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX810-31SAG-7 is usually 5 days.
3.What payment methods are accepted for APX810-31SAG-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX810-31SAG-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX810-31SAG-7?
APX810-31SAG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX810-31SAG-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 APX810-31SAG-7?
For technical support, including APX810-31SAG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX810-31SAG-7 requirements.
6.How does Aetrix verify that APX810-31SAG-7 is sourced from the original manufacturer or authorized distributors?
All APX810-31SAG-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 APX810-31SAG-7 meets industry standards.
7.What is the process for return or replacement of APX810-31SAG-7?
All APX810-31SAG-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX810-31SAG-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 APX810-31SAG-7 part is unused and in its original packaging.
Return procedure for APX810-31SAG-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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