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Diodes Incorporated AP1703FWG-7
- Part No.:
- AP1703FWG-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AP1703FWG-7.pdf
- Description:
- IC MPU RESET CIRC 2.63V SC59-3
- Quantity:
- Payment:
- Shipping:
Inventory:5,988
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Product details
Overview
AP1703FWG-7 from Diodes Incorporated is a 3-pin active-low microprocessor reset supervisor IC in SC59 package, with 2.25V reset threshold, 240ms minimum reset timeout, 20µA typical supply current, and guaranteed reset validity down to VCC = 1V. It monitors +2.5V/+3.0V/+3.3V/+5V power rails in embedded controllers and portable systems.
For engineers reviewing the AP1703FWG-7 datasheet, AP1703FWG-7 pinout, AP1703FWG-7 application, or AP1703FWG-7 equivalent, key selection criteria include reset threshold accuracy (±1.5% at 25°C), push-pull output drive capability (1.2mA sink), transient immunity (100µs/100mV glitch rejection), and RoHS-compliant green SC59 packaging.
Technical Context
The AP1703FWG-7 implements a precision bandgap-based voltage comparator with internal 240ms delay timer and push-pull output stage. Its reset assertion is triggered when VCC falls below 2.25V (±1.5%), and remains active for ≥240ms after VCC recovers above threshold.
Designed for brownout detection in low-power digital systems, it features 30ppm/°C temperature coefficient, operates from 1.0V to 5.5V supply, and maintains valid logic state on RESET pin down to VCC = 1V - critical for deterministic startup in battery-powered equipment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.25V ±1.5% - ensures reliable detection of 2.5V rail collapse before system instability |
| Reset Timeout | 240ms min - guarantees sufficient hold time for µP initialization sequences |
| Supply Current | 20µA typ. - enables multi-year operation in coin-cell–powered monitoring circuits |
| VCC Range | 1.0V to 5.5V - supports operation during deep brownout and full-rail conditions |
| Output Type | Push-pull active-low - eliminates external pull-up resistor, reduces BOM count |
| Tempco | 30ppm/°C - maintains threshold stability across -40°C to +105°C industrial range |
| Glitch Immunity | 100µs max at 100mV overdrive - rejects common switching noise without false resets |
Pinout & Package
AP1703FWG-7 is housed in a lead-free, green SC59-3L (SOT-23 compatible) surface-mount package measuring 2.90–3.10mm × 1.50–1.70mm × 1.00–1.30mm, optimized for automated assembly and thermal performance in space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal comparator and output driver; must be low-impedance connection |
| 2 | VCC | Power supply input; monitors rail voltage and powers internal circuitry |
| 3 | RESET | Active-low push-pull reset output; sinks 1.2mA minimum to assert reset on µP / µC |
Key Features
| Feature | Design Value |
|---|---|
| Precision 2.25V threshold | ±1.5% tolerance ensures accurate detection of 2.5V rail undervoltage without margin overlap |
| 240ms reset timeout | Guaranteed minimum duration satisfies ARM Cortex-M and PIC MCU power-on reset timing requirements |
| 1V valid reset operation | RESET remains logic-low down to VCC = 1V, preventing spurious release during deep brownout recovery |
| No external components | Self-contained supervision eliminates R/C network, reducing layout area and qualification effort |
| Lead-free & green compliant | Meets RoHS Directive Annex exemptions; suitable for automotive and industrial end-equipment |
Applications
| Industrial Controllers | Portable Medical Devices |
|---|---|
Use Scenario: PLC I/O modules powered by 3.3V DC-DC converters subject to load transients and EMI. IC Role / Device Role / Timing Role: Monitors 3.3V rail and asserts active-low reset to ARM-based controller upon >5% undervoltage. Use Value: Prevents firmware corruption during field-induced brownouts using 240ms guaranteed hold time and 30ppm/°C threshold stability. | Use Scenario: Battery-powered glucose meter with Li-ion cell discharging from 4.2V to 2.8V. IC Role / Device Role / Timing Role: Supervises 2.5V LDO output feeding MCU; triggers reset if voltage drops below 2.25V. Use Value: Enables safe shutdown before data loss using 20µA quiescent current and valid reset down to VCC = 1V. |
| Automotive Body Control Modules | Smart Energy Meters |
Use Scenario: 12V-to-3.3V converted supply in door module exposed to load dump and cold-crank conditions. IC Role / Device Role / Timing Role: Detects 3.3V rail collapse during cold-crank (battery dip to 6V) and holds reset for 240ms. Use Value: Ensures deterministic restart after engine cranking via push-pull output immune to 100µs/100mV transients. | Use Scenario: Three-phase electricity meter with isolated 3.3V supply powering metrology SoC. IC Role / Device Role / Timing Role: Provides power-on reset and brownout protection for real-time clock and flash memory subsystems. Use Value: Eliminates need for external RC network while meeting IEC 62056-21 reset timing compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| APX809S23-22 | 2.2V threshold, 140ms timeout, SOT23-3 package, 1.5µA IQ | Lower IQ suits ultra-low-power IoT sensors; shorter timeout may not meet legacy MCU specs | Select for new designs prioritizing energy efficiency over backward compatibility |
| TPS3808G12DBVR | 1.23V adjustable threshold via external resistor, 200ms timeout, 2.5µA IQ, higher cost | Configurable threshold supports custom rails; requires external component and layout area | Choose when non-standard supply voltages (e.g., 1.8V) require precise reset point tuning |
Compared with AP1703FWG-7, APX809S23-22 offers superior quiescent current but reduced reset hold time, while TPS3808G12DBVR provides design flexibility at the cost of BOM complexity and unit price - making AP1703FWG-7 optimal for cost-sensitive, fixed-threshold 2.5V system supervision.
Availability
AP1703FWG-7 is available at Aetrix Electronics and suitable for industrial controllers, portable medical devices, automotive body control modules, and smart energy meters requiring stable component supply and long-term production continuity.
Supply support for AP1703FWG-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, serving industrial, computing, consumer, and automotive markets with high-reliability, cost-optimized components.
The AP170x series belongs to Diodes' microprocessor supervisory product line, engineered specifically for deterministic power-on reset and brownout protection in resource-constrained embedded systems with fixed supply rails.
FAQ
What is the function of the RESET pin on AP1703FWG-7?
The RESET pin is an active-low push-pull output that drives logic-low when VCC falls below 2.25V, holding that state for ≥240ms after VCC rises above threshold. It sinks up to 1.2mA and requires no external pull-up, directly interfacing with standard CMOS reset inputs on microcontrollers and processors.
Can AP1703FWG-7 operate reliably during fast VCC transients?
Yes - the AP1703FWG-7 ignores negative-going VCC transients ≤100µs in duration when magnitude is ≤100mV below threshold, due to internal comparator hysteresis and glitch filtering. A 0.1µF ceramic capacitor placed near the VCC pin further enhances immunity to switching noise.
Is AP1703FWG-7 suitable for automotive applications?
Yes - it is qualified for operation from -40°C to +105°C, meets RoHS requirements with lead-free/green packaging, and provides robust reset behavior during cold-crank (low-VCC) and load-dump conditions. However, it is not AEC-Q100 qualified; for certified automotive use, consult Diodes' AEC-Q100 portfolio.
Why does AP1703FWG-7 specify "NOT RECOMMENDED FOR NEW DESIGN"?
This designation reflects Diodes' recommendation to adopt the newer APX809/810 series for new projects due to improved specifications (lower IQ, tighter threshold tolerance, enhanced ESD). AP1703FWG-7 remains fully supported for existing designs and legacy production, with no announced obsolescence.
AP1703FWG-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:
- Discontinued at Digi-Key
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.63V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-59-3
AP1703FWG-7 FAQ
1.How can I place an order for AP1703FWG-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1703FWG-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 AP1703FWG-7 reliable?
The price and inventory of AP1703FWG-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1703FWG-7 is usually 5 days.
3.What payment methods are accepted for AP1703FWG-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1703FWG-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1703FWG-7?
AP1703FWG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1703FWG-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 AP1703FWG-7?
For technical support, including AP1703FWG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1703FWG-7 requirements.
6.How does Aetrix verify that AP1703FWG-7 is sourced from the original manufacturer or authorized distributors?
All AP1703FWG-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 AP1703FWG-7 meets industry standards.
7.What is the process for return or replacement of AP1703FWG-7?
All AP1703FWG-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP1703FWG-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 AP1703FWG-7 part is unused and in its original packaging.
Return procedure for AP1703FWG-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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