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Diodes Incorporated APX803-26SRG-7
- Part No.:
- APX803-26SRG-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX803-26SRG-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23R
- Quantity:
- Payment:
- Shipping:
Inventory:2,900
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Product details
Overview
APX803-26SRG-7 from Diodes Incorporated is a 3-pin SOT23 open-drain microprocessor reset supervisor IC with 2.63V ±0.04V precision reset threshold, 200ms typical reset timeout, and guaranteed operation down to VCC = 1V. It monitors 3.3V/3.0V digital power rails in embedded controllers and portable systems, asserting an active-low RESET signal during power-up, brownout, or supply glitches.
For engineers reviewing the APX803-26SRG-7 datasheet, APX803-26SRG-7 pinout, APX803-26SRG-7 application, or APX803-26SRG-7 equivalent, key selection criteria include reset threshold accuracy over temperature (±30 ppm/°C), low 30µA supply current, open-drain output compatibility with bidirectional µP reset pins, and SOT23-SR package footprint.
Technical Context
The APX803-26SRG-7 implements a precision bandgap-based voltage comparator with 40mV hysteresis to reject fast VCC transients, coupled to a temperature-stable internal oscillator that controls the 200ms reset timeout period. Its open-drain N-channel output stage sinks up to 3.5mA at VCC ≥ 2.63V – 0.2V while maintaining VOL ≤ 0.4V.
Designed for single-supply monitoring, it requires no external components and guarantees valid reset assertion across -40°C to +85°C ambient, with reset threshold drift limited to ±30 ppm/°C and full functionality maintained down to VCC = 1V - enabling reliable reset hold during deep brownout conditions before system shutdown.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.63V ±0.04V at +25°C; enables precise supervision of 3.0V/3.3V rails without external calibration |
| Reset Timeout | 200ms typical; ensures µP completes full initialization before release from reset |
| Supply Current | 30µA typical; supports battery-powered applications with multi-year standby life |
| VCC Operating Range | 1.1V to 5.5V; allows use with 1.2V–5V logic families and brownout detection down to 1V |
| Output Type | Open-drain active-low; interfaces directly with bidirectional µP reset pins using single pull-up resistor |
| Reset Hysteresis | 40mV; prevents oscillation during slow VCC recovery near threshold |
| Tempco | ±30 ppm/°C; maintains threshold stability across industrial temperature range |
Pinout & Package
SOT23-3 (SR package) surface-mount package with 2.4mm × 1.3mm footprint, 0.95mm height, and standard JEDEC MO-178 leadframe. RoHS-compliant, halogen-free "Green" molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference | Return path for internal comparator and output driver; must connect to system ground plane |
| 2 (VCC) | Supply input | Monitored power rail input; powers internal circuitry and defines reset threshold reference |
| 3 (RESET) | Open-drain output | Active-low reset signal; requires external pull-up to monitored or target supply; sinks up to 3.5mA |
Key Features
| Feature | Design Value |
|---|---|
| Precision voltage monitoring | 2.63V threshold with ±0.04V tolerance and ±30 ppm/°C drift ensures accurate 3.0V/3.3V rail supervision |
| Guaranteed reset validity to 1V | Enables fail-safe reset assertion during deep brownout, preventing µP execution below safe operating voltage |
| No external components required | Reduces BOM count and PCB area; eliminates calibration resistors or timing capacitors |
| Transient-immune comparator | 40mV hysteresis and internal filtering reject <20µs VCC glitches, avoiding false resets |
| Low-power open-drain output | 30µA supply current and 3.5mA sink capability support portable designs with minimal power overhead |
Applications
| Industrial PLC Controllers | Portable Medical Monitors |
|---|---|
Use Scenario: Supervising 3.3V main logic supply in programmable logic controller CPU modules exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: Microprocessor reset supervisor ensuring deterministic boot after cold start or line interruption. Use Value: 200ms timeout guarantees full FPGA configuration and peripheral initialization before software execution begins. | Use Scenario: Monitoring 3.0V battery-backed supply in handheld ECG devices requiring >5-year shelf life and reliable wake-from-sleep reset. IC Role / Device Role / Timing Role: Low-current reset generator maintaining valid reset state during battery voltage sag between charge cycles. Use Value: 30µA quiescent current extends battery runtime; 1V minimum VCC operation prevents premature release during end-of-life discharge. |
| Automotive Body Control Modules | Smart Energy Meters |
Use Scenario: Reset supervision for 3.3V microcontroller in door module subjected to load dump and cold crank conditions. IC Role / Device Role / Timing Role: Brownout detector asserting reset when 12V-to-3.3V DC/DC output dips below 2.63V during cranking. Use Value: 40mV hysteresis prevents chatter during slow VCC recovery; open-drain output interfaces with automotive-grade µP reset pins. | Use Scenario: Power-on reset generation for metrology SoC in DIN-rail mounted electricity meters operating continuously for 15+ years. IC Role / Device Role / Timing Role: Precision reset supervisor ensuring clean boot after AC mains interruption or capacitor hold-up decay. Use Value: ±30 ppm/°C tempco maintains threshold accuracy across -25°C to +70°C enclosure temperatures without recalibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| APX809-26SA-7 | Push-pull (not open-drain) RESET output; same 2.63V threshold and 200ms timeout | Requires no external pull-up; incompatible with bidirectional µP reset pins | Select when driving CMOS inputs directly without level-shifting or shared reset bus |
| MAX809TRD2T1G | 2.63V threshold, 140ms min timeout, 20µA ICC, SOT23-3 package | Shorter timeout may not meet µP initialization requirements; lower supply current | Select for ultra-low-power applications where 140ms timeout suffices and 10µA ICC reduction is critical |
Compared with APX809-26SA-7, the APX803-26SRG-7's open-drain output enables flexible pull-up to different voltage domains and shared reset busing, while MAX809TRD2T1G trades timeout margin for lower ICC - making APX803-26SRG-7 optimal for robust industrial boot sequencing.
Availability
APX803-26SRG-7 is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical monitors, automotive body control modules, and smart energy meters requiring stable component supply and long-term lifecycle support.
Supply support for APX803-26SRG-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 APX803 series belongs to Diodes' supervisory IC product line, engineered specifically for cost-sensitive, space-constrained microprocessor reset applications requiring precision threshold accuracy, low quiescent current, and robust transient immunity.
FAQ
What is the exact reset threshold voltage and tolerance for APX803-26SRG-7?
The APX803-26SRG-7 has a nominal reset threshold of 2.63V with a guaranteed tolerance of ±0.04V (2.59V to 2.66V) at +25°C, and ±30 ppm/°C temperature coefficient over -40°C to +85°C ambient. This matches the 3.0V/3.3V supply rails commonly used in microcontrollers and FPGAs.
Does APX803-26SRG-7 require an external pull-up resistor on the RESET pin?
Yes - the APX803-26SRG-7 features an open-drain active-low RESET output and requires an external pull-up resistor to a valid logic supply (typically the same VCC or target µP supply). The datasheet specifies a maximum sink current of 3.5mA at VCC ≥ 2.43V, supporting standard 4.7kΩ–10kΩ pull-ups.
Can APX803-26SRG-7 operate reliably during deep brownout conditions?
Yes - the device guarantees valid reset assertion down to VCC = 1V, and its internal comparator remains functional across the full 1.1V–5.5V operating range. Below 1V, the output transitions to high-impedance, but this aligns with µP inactivity at such voltages, preserving system safety.
What is the difference between SR and SA package suffixes in APX803-26SRG-7?
The SR and SA suffixes denote two mechanical variants of the SOT23-3 package: SR uses a gull-wing leadform optimized for automated optical inspection and reflow, while SA uses a slightly different lead geometry per Diodes' package outline drawings. Both share identical electrical specs, thermal resistance (θJA = 201°C/W), and 3000-unit tape-and-reel packaging (-7).
APX803-26SRG-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:
- 2.63V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT23R
APX803-26SRG-7 FAQ
1.How can I place an order for APX803-26SRG-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803-26SRG-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 APX803-26SRG-7 reliable?
The price and inventory of APX803-26SRG-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803-26SRG-7 is usually 5 days.
3.What payment methods are accepted for APX803-26SRG-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803-26SRG-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803-26SRG-7?
APX803-26SRG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803-26SRG-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 APX803-26SRG-7?
For technical support, including APX803-26SRG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803-26SRG-7 requirements.
6.How does Aetrix verify that APX803-26SRG-7 is sourced from the original manufacturer or authorized distributors?
All APX803-26SRG-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 APX803-26SRG-7 meets industry standards.
7.What is the process for return or replacement of APX803-26SRG-7?
All APX803-26SRG-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803-26SRG-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 APX803-26SRG-7 part is unused and in its original packaging.
Return procedure for APX803-26SRG-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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