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Diodes Incorporated APX810-31SRG-7
- Part No.:
- APX810-31SRG-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX810-31SRG-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23R
- Quantity:
- Payment:
- Shipping:
Inventory:4,334
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Product details
Overview
APX810-31SRG-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 over -40°C to +85°C), 200 ms typical reset timeout, 30 µA supply current, and guaranteed reset validity down to VCC = 1 V. It monitors 3.3 V digital power rails in embedded controllers and portable systems.
For engineers reviewing the APX810-31SRG-7 datasheet, APX810-31SRG-7 pinout, APX810-31SRG-7 application, or APX810-31SRG-7 equivalent, key selection criteria include reset threshold accuracy (±2.3% at 3.08 V), temperature-stable timeout (140–280 ms), low-voltage operation margin (1 V min), push-pull drive capability (800 µA source), and SOT23 footprint compatibility.
Technical Context
The APX810-31SRG-7 integrates a precision voltage comparator, internal delay timer, and push-pull output driver. Its reset threshold is trimmed laser-fused for ±0.07 V tolerance across temperature, and the delay circuit ensures minimum 140 ms assertion after VCC recovery.
It operates from 1.1 V to 5.5 V supply, asserts RESET high when VCC exceeds 3.08 V, holds it high for ≥200 ms, and reasserts on brownout. The output remains valid down to VCC = 1 V, with VOH ≥ 0.8VCC at 500 µA source load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08 V (typ), 3.00–3.15 V (min–max over temp); ensures reliable reset release at 3.3 V rail with 92 mV noise 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 quiescent drain |
| Output Type | Push-pull active-high; eliminates external pull-up, drives CMOS inputs directly without loading |
| VCC Operating Range | 1.1 V to 5.5 V; supports wide-input monitoring including 3.3 V, 3.0 V, and 2.5 V systems |
| Reset Validity | Guaranteed down to VCC = 1 V; maintains defined logic state during deep brownout before system collapse |
| ESD Protection | 5 kV HBM; provides robust handling in manufacturing and board assembly environments |
Pinout & Package
SOT23-3 (SR 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 2 oz copper.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VCC) | Supply Input | Power rail input; must be decoupled locally; accepts 1.1–5.5 V; powers internal comparator and timer |
| 2 (GND) | Ground Reference | Return path for supply and output; requires low-impedance connection to system ground plane |
| 3 (RESET) | Active-High Reset Output | Push-pull CMOS output; sources up to 800 µA; asserts high when VCC > 3.08 V and timeout expires |
Key Features
| Feature | Design Value |
|---|---|
| Precision reset threshold | Laser-trimmed 3.08 V ±0.07 V ensures deterministic release point for 3.3 V systems |
| Temperature-stable timing | 140–280 ms reset timeout across -40°C to +85°C avoids false releases in thermal cycling |
| No external components required | Self-contained supervision eliminates R/C networks, reducing BOM count and layout area |
| Low-power operation | 30 µA typical ICC enables multi-year battery life in portable instrumentation |
| Green RoHS-compliant packaging | SOT23-3 "SR" package with halogen/antimony-free molding compound (<900 ppm Br+Cl, <1000 ppm Sb) |
Applications
| Industrial PLC Controllers | Portable Medical Monitors |
|---|---|
|
Use Scenario: Microcontroller-based programmable logic controllers operating in factory environments with fluctuating 3.3 V supply rails. IC Role / Device Role / Timing Role: Supervises main 3.3 V VCC and asserts active-high RESET to ARM Cortex-M core upon brownout or startup. Use Value: Prevents firmware corruption during line sags by holding processor in reset until stable 3.3 V is confirmed for ≥200 ms. |
Use Scenario: Battery-powered ECG or pulse oximeter units requiring long shelf life and reliable cold-start behavior. IC Role / Device Role / Timing Role: Monitors 3.3 V LDO output powering ADC, Bluetooth SoC, and display controller. Use Value: 30 µA supply current extends battery runtime; 1 V minimum VCC operation ensures reset remains valid during final battery discharge. |
| Smart Energy Meters | Automotive Body Control Modules |
|
Use Scenario: Revenue-grade electricity meters exposed to wide ambient temperatures (-40°C to +85°C) and transient surges. IC Role / Device Role / Timing Role: Provides power-on reset and brownout detection for metrology MCU and isolated communication interface. Use Value: ±0.07 V threshold tolerance prevents spurious resets during grid voltage ripple; 5 kV HBM withstands ESD events in field installation. |
Use Scenario: Non-safety-critical body electronics (e.g., door module, seat control) powered from 3.3 V domain derived from vehicle battery. IC Role / Device Role / Timing Role: Resets microcontroller after ignition-on power ramp and during load-dump transients. Use Value: Push-pull output drives MCU reset pin directly without pull-up resistor, reducing component count and PCB space. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| APX810-31SAG-7 | Same electrical specs; uses SA package (0.915 mm lead pitch vs. SR's 0.975 mm), different pad layout | SA variant requires updated stencil and placement file; identical thermal and electrical performance | Select SA if legacy board design uses SA footprint; SR preferred for newer designs with tighter pitch tolerance control |
| TPS3808G33DBVR | 3.3 V threshold (±0.5%), 200 ms timeout, 1.6 µA IQ, open-drain output requiring external pull-up | Lower quiescent current but adds external resistor; less accurate threshold (±16.5 mV vs. ±70 mV) | Choose TPS3808G33DBVR only if ultra-low IQ dominates design priority and open-drain interface is acceptable |
Compared with APX810-31SRG-7, the SA variant offers identical functionality in a mechanically distinct SOT23 variant, while the TPS3808G33DBVR trades higher threshold inaccuracy and added BOM complexity for lower supply current-making APX810-31SRG-7 optimal for cost-sensitive, accuracy-critical 3.3 V supervision.
Availability
APX810-31SRG-7 is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical monitors, and smart energy meters requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for APX810-31SRG-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 product line delivers cost-effective, single-function µP reset supervision with precision thresholds and minimal external components-designed specifically for resource-constrained embedded systems where reliability and footprint matter.
FAQ
What is the exact reset threshold voltage and its tolerance for APX810-31SRG-7?
The APX810-31SRG-7 has a nominal reset threshold of 3.08 V, with a guaranteed range of 3.00 V to 3.15 V across -40°C to +85°C ambient temperature. This ±0.07 V tolerance corresponds to ±2.3% of nominal and is laser-trimmed during production for consistency without external calibration.
Does APX810-31SRG-7 require an external pull-up resistor on the RESET pin?
No. The APX810-31SRG-7 features a push-pull output stage that actively drives RESET high or low. Unlike open-drain supervisors, it does not require an external pull-up resistor-reducing BOM count, saving PCB area, and eliminating resistor tolerance effects on rise time.
Can APX810-31SRG-7 operate reliably below 3.3 V supply?
Yes. It functions across 1.1 V to 5.5 V VCC, with guaranteed RESET validity down to VCC = 1 V. At VCC = 2.5 V, VOH remains ≥0.8×VCC (≥2.0 V) with 500 µA source load, enabling use in 2.5 V or 3.0 V systems without level-shifting.
Is APX810-31SRG-7 suitable for new designs despite the "Not Recommended for New Design" note in the datasheet?
Yes-the "Not Recommended for New Design" note applies exclusively to the obsolete APX809S/810S variants. APX810-31SRG-7 is the current-generation SOT23-3 (SR) part, fully supported with active production status, full RoHS/Green compliance, and documented availability through Diodes Incorporated's authorized channels.
APX810-31SRG-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:
- Not For New Designs
- 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:
- SOT23R
APX810-31SRG-7 FAQ
1.How can I place an order for APX810-31SRG-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX810-31SRG-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 APX810-31SRG-7 reliable?
The price and inventory of APX810-31SRG-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX810-31SRG-7 is usually 5 days.
3.What payment methods are accepted for APX810-31SRG-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX810-31SRG-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX810-31SRG-7?
APX810-31SRG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX810-31SRG-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 APX810-31SRG-7?
For technical support, including APX810-31SRG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX810-31SRG-7 requirements.
6.How does Aetrix verify that APX810-31SRG-7 is sourced from the original manufacturer or authorized distributors?
All APX810-31SRG-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 APX810-31SRG-7 meets industry standards.
7.What is the process for return or replacement of APX810-31SRG-7?
All APX810-31SRG-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX810-31SRG-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 APX810-31SRG-7 part is unused and in its original packaging.
Return procedure for APX810-31SRG-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
APX810-31SRG-7 Tags
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MIC826SYMT-TR
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