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Diodes Incorporated AP1703CWG-7
- Part No.:
- AP1703CWG-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AP1703CWG-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC59-3
- Quantity:
- Payment:
- Shipping:
Inventory:6,000
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Product details
Overview
AP1703CWG-7 from Diodes Incorporated is a 3-pin active-low microprocessor reset supervisor IC in SC59 package, with 4.00V reset threshold, 240ms minimum reset timeout, 20µA typical supply current, and guaranteed reset validity down to VCC = +1V. It monitors +3.3V/+3.0V digital power rails in embedded controllers and portable equipment to prevent erroneous code execution during brownout.
For engineers reviewing the AP1703CWG-7 datasheet, AP1703CWG-7 pinout, AP1703CWG-7 application, or AP1703CWG-7 equivalent, key selection criteria include reset threshold accuracy (±0.08V), push-pull output drive capability (1.2mA sink), transient immunity (100µs/100mV), and operation over –40°C to +105°C junction temperature.
Technical Context
The AP1703CWG-7 integrates a precision voltage comparator with internal reference (2.25V), delay timer circuit, and push-pull output stage. Its reset assertion is triggered when VCC falls below 4.00V (typ.), with hysteresis of 0.1V and tempco of 30ppm/°C - ensuring stable trip point across industrial temperature range.
It features glitch immunity via internal set-up time (100µs) and ignores transients ≤100µs at 100mV overdrive. The RESET output remains valid (logic low) for VCC ≥1V and asserts for ≥240ms after VCC recovers above threshold, meeting µP power-on reset timing requirements without external RC components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.00V (typ.), ±0.08V tolerance - matches +3.3V system supply with 21% headroom before reset activation |
| Reset Timeout | 240ms (min.) - satisfies Intel-compatible µP power-on reset hold time requirement |
| Supply Current | 20µA (typ.) - enables multi-year battery life in portable monitoring devices |
| VCC Validity Range | 1.0V to 5.5V - ensures functional reset assertion even during deep brownout conditions |
| Output Type | Push-pull active-low - eliminates need for external pull-up resistor and supports direct CMOS input drive |
| Tempco | 30ppm/°C - limits threshold drift to ±0.012V over –40°C to +105°C operating range |
| Transient Immunity | 100µs max duration at 100mV overdrive - suppresses common switching noise without false resets |
Pinout & Package
AP1703CWG-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, with gull-wing leads and 0.95mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal comparator and output driver; must be low-impedance connection to system ground plane |
| 2 | VCC | Power supply input; accepts 1.0V–5.5V; bypass capacitor (0.1µF) required adjacent to pin for transient immunity |
| 3 | RESET | Active-low push-pull reset output; sinks 1.2mA minimum at VCC ≥ VTH; logic low until 240ms after VCC > 4.00V |
Key Features
| Feature | Design Value |
|---|---|
| Precision reset threshold | 4.00V ±0.08V at 25°C - eliminates manual calibration and supports tight-tolerance +3.3V rail monitoring |
| No external components required | Integrated delay timer and reference - reduces BOM count and PCB area vs. discrete RC reset solutions |
| Guaranteed reset validity to VCC = 1V | Output remains logic-low down to 1V supply - ensures deterministic state during deep undervoltage recovery |
| High noise immunity | 100µs glitch rejection at 100mV overdrive - prevents spurious resets from DC-DC switching noise |
| Lead-free & RoHS compliant | SC59-3L package with green finish per EU Directive Annex Notes 5 and 7 - meets industrial environmental compliance |
Applications
| Industrial PLC Controllers | Portable Medical Monitors |
|---|---|
|
Use Scenario: Power sequencing and brownout detection in programmable logic controller CPU modules operating on 3.3V rails. IC Role / Device Role / Timing Role: Active-low reset supervisor asserting synchronous reset to ARM Cortex-M7 core during VCC dip below 4.00V. Use Value: Prevents firmware corruption by holding processor in reset for ≥240ms after supply recovery - meeting IEC 61000-4-11 immunity requirements. |
Use Scenario: Battery-powered ECG data loggers requiring reliable startup and low-power supervision. IC Role / Device Role / Timing Role: Reset generator monitoring 3.0V LDO output; triggers MCU reset if battery voltage drops below safe operating level. Use Value: 20µA quiescent current extends single-CR2032 battery life beyond 5 years in sleep mode while maintaining reset integrity. |
| Automotive Body Control Modules | Smart Energy Meters |
|
Use Scenario: Cold-cranking voltage monitoring in 12V-to-3.3V converted systems during engine start. IC Role / Device Role / Timing Role: Supervises post-regulation 3.3V domain; asserts reset during <1.0V dropout events caused by alternator load dump transients. Use Value: Valid reset output down to VCC = 1V ensures deterministic MCU behavior even during severe under-voltage - critical for ASIL-B functional safety paths. |
Use Scenario: Tamper-resistant metering ICs powered from supercapacitor backup during mains failure. IC Role / Device Role / Timing Role: Resets计量 SoC when supercapacitor voltage decays below 4.00V, preventing invalid energy accumulation during brownout. Use Value: 30ppm/°C tempco maintains threshold stability across –25°C to +70°C meter enclosure temperatures - avoiding false resets in outdoor deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| APX809S24T-7 | 2.4V fixed reset threshold; SOT23-3 package; 140ms reset timeout | Designed for lower-voltage systems (e.g., 2.5V FPGA banks); shorter timeout may not satisfy legacy µP requirements | Select when supervising 2.5V domains and board space permits SOT23 footprint |
| TPS3808G12DBVR | 1.2V threshold; adjustable timeout (200ms–3.2s); higher ICC (2.5µA typ.) | Supports ultra-low-voltage ASICs; programmable delay enables custom reset sequencing | Choose for designs requiring timeout flexibility or sub-1.8V supply monitoring |
Compared with AP1703CWG-7, APX809S24T-7 offers tighter threshold tolerance but lacks industrial temp range support, while TPS3808G12DBVR provides configurability at cost of higher complexity and reduced integration - making AP1703CWG-7 optimal for cost-sensitive, fixed-threshold +3.3V applications.
Availability
AP1703CWG-7 is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical monitors, and automotive body control modules requiring stable component supply and long-term lifecycle continuity.
Supply support for AP1703CWG-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 and automotive markets.
The AP170X series was designed specifically for cost-effective, single-function microprocessor reset supervision in space-constrained embedded systems - prioritizing precision threshold, low quiescent current, and robust transient immunity over programmability.
FAQ
What is the exact reset threshold voltage for AP1703CWG-7?
The AP1703CWG-7 has a nominal reset threshold of 4.00V at 25°C, with a guaranteed range of 3.92V to 4.08V across temperature and process variation. This value is laser-trimmed during manufacturing and specified in the Electrical Characteristics table of the official datasheet Rev. 2 (January 2007), page 3.
Can AP1703CWG-7 be used with a 5V microcontroller?
Yes - AP1703CWG-7 operates with VCC from 1.0V to 5.5V and asserts reset when VCC falls below 4.00V, making it suitable for 5V µPs where reset must trigger before supply drops into marginal logic-high range. Its push-pull output drives standard CMOS inputs directly without external pull-up.
Is there a recommended bypass capacitor for AP1703CWG-7?
A 0.1µF ceramic capacitor is explicitly recommended in the datasheet (page 4, Typical Application Circuit) and must be placed as close as possible to the VCC pin. This minimizes impedance path and enhances immunity to fast transients - critical for achieving the specified 100µs/100mV glitch rejection performance.
Why is AP1703CWG-7 marked "Not Recommended for New Design"?
Diodes Incorporated issued this notice because the newer APX809/810 series offers improved specifications: tighter threshold tolerance (±0.5%), wider temperature range (–40°C to +125°C), and enhanced ESD robustness. However, AP1703CWG-7 remains fully qualified and supported for existing designs and legacy production programs.
AP1703CWG-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:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4V
- 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
AP1703CWG-7 FAQ
1.How can I place an order for AP1703CWG-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1703CWG-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 AP1703CWG-7 reliable?
The price and inventory of AP1703CWG-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1703CWG-7 is usually 5 days.
3.What payment methods are accepted for AP1703CWG-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1703CWG-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1703CWG-7?
AP1703CWG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1703CWG-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 AP1703CWG-7?
For technical support, including AP1703CWG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1703CWG-7 requirements.
6.How does Aetrix verify that AP1703CWG-7 is sourced from the original manufacturer or authorized distributors?
All AP1703CWG-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 AP1703CWG-7 meets industry standards.
7.What is the process for return or replacement of AP1703CWG-7?
All AP1703CWG-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP1703CWG-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 AP1703CWG-7 part is unused and in its original packaging.
Return procedure for AP1703CWG-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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