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Diodes Incorporated AP1703BWG-7
- Part No.:
- AP1703BWG-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AP1703BWG-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC59-3
- Quantity:
- Payment:
- Shipping:
Inventory:6,000
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Product details
Overview
AP1703BWG-7 from Diodes Incorporated is a 3-pin microprocessor reset supervisor IC with active-low push-pull RESET output, 4.38 V reset threshold (±0.09 V), 240 ms minimum reset timeout, 20 µA typical supply current, and guaranteed operation down to VCC = 1 V. 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 AP1703BWG-7 datasheet, AP1703BWG-7 pinout, AP1703BWG-7 application, or AP1703BWG-7 equivalent, key selection criteria include reset threshold accuracy (±2%), immunity to sub-100 µs VCC transients, push-pull output drive capability (1.2 mA sink), SC59 package compatibility, and legacy design support where APX809/810 migration is not yet feasible.
Technical Context
The AP1703BWG-7 integrates a precision voltage comparator with internal reference (30 ppm/°C tempco), a 240 ms reset timeout timer, and a push-pull output stage. Its reset assertion logic is triggered when VCC falls below 4.38 V and held active for ≥240 ms after VCC rises above threshold.
Designed for single-supply monitoring of +3.3 V systems, it operates across –40°C to +105°C, tolerates VCC down to 1.0 V with valid RESET state, and rejects fast transients via built-in glitch immunity-no external RC network required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.38 V ±0.09 V - matches nominal +3.3 V rail with 32% headroom for brownout detection |
| Reset Timeout | 240 ms min - ensures µP initialization completes before release |
| Supply Current | 20 µA typ. - enables battery longevity in portable equipment |
| VCC Operating Range | 1.0 V to 5.5 V - guarantees RESET validity even during deep brownout |
| Output Type | Push-pull active-low - drives CMOS inputs directly without pull-up resistor |
| Transient Immunity | 100 µs max at 100 mV overdrive - suppresses common power-rail noise |
| Tempco | 30 ppm/°C - maintains threshold stability across industrial temperature range |
Pinout & Package
AP1703BWG-7 is housed in an SC59-3L (SOT-23 compatible) surface-mount package measuring 2.90–3.10 mm × 1.50–1.70 mm × 1.00–1.30 mm, with gull-wing leads and lead-free/RoHS-compliant finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal comparator and output driver |
| 2 | VCC | Power input; device functions only when ≥1.0 V applied |
| 3 | RESET | Active-low push-pull output; sinks 1.2 mA minimum when asserted |
Key Features
| Feature | Design Value |
|---|---|
| Precision reset threshold | 4.38 V ±2% - eliminates need for external trimming in +3.3 V systems |
| No external components required | Integrated reference, timer, and driver - reduces BOM count and PCB area |
| Guaranteed RESET validity to VCC = 1 V | Ensures deterministic behavior during deep undervoltage, unlike open-drain alternatives |
| Low quiescent current | 20 µA typical - extends battery life in always-on monitoring applications |
| SC59-3L RoHS-compliant package | Compatible with standard SOT-23 reflow profiles and automated assembly |
Applications
| Industrial Controllers | Portable Medical Devices |
|---|---|
Use Scenario: PLC I/O modules powered by regulated +3.3 V supplies subject to intermittent brownouts during factory floor voltage sags. IC Role / Device Role / Timing Role: Microprocessor reset supervisor asserting active-low signal to ARM Cortex-M4 reset pin during undervoltage events. Use Value: Prevents firmware corruption by holding µP in reset until supply stabilizes for ≥240 ms post-recovery. | Use Scenario: Handheld glucose meters using coin-cell batteries where supply voltage decays gradually from 3.3 V to 2.0 V during discharge. IC Role / Device Role / Timing Role: Power-on and brownout detector triggering controlled shutdown sequence before critical data loss. Use Value: 20 µA supply current extends usable battery life; 1.0 V VCC operation ensures reset remains valid through full discharge curve. |
| Automotive Body Control Modules | Smart Energy Meters |
Use Scenario: 12 V automotive system with local +3.3 V LDO powering MCU, exposed to load-dump and cold-crank transients. IC Role / Device Role / Timing Role: Reset supervisor immune to ≤100 µs negative VCC glitches, preventing spurious resets during ignition cycles. Use Value: Built-in transient rejection avoids false triggers without adding external RC filtering or TVS diodes. | Use Scenario: DIN-rail mounted electricity meter with isolated +3.3 V domain for metrology SoC and communication interface. IC Role / Device Role / Timing Role: Ensures reliable power-on initialization of dual-core metering ASIC after AC power restoration. Use Value: Push-pull output drives high-capacitance bus lines directly; no pull-up loading on sensitive analog supply rail. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| APX809S23-33 | 3.3 V fixed threshold, 140 ms reset timeout, 0.5 µA max IQ | Optimized for ultra-low-power IoT nodes; lacks 240 ms hold time for slower µPs | Select when lowest possible current dominates over timing margin |
| TPS3808G33DBVR | 3.3 V threshold, 200 ms timeout, 16 µA IQ, adjustable delay option | Higher cost, requires external capacitor for delay tuning; supports wider VCC range (1.3–6.8 V) | Choose when design flexibility or extended voltage range justifies premium |
Compared with APX809S23-33 and TPS3808G33DBVR, AP1703BWG-7 offers longer guaranteed reset hold time (240 ms vs. 140/200 ms) and higher VCC minimum (1.0 V vs. 0.8/1.3 V), making it preferable for legacy µPs requiring robust brownout recovery without redesign.
Availability
AP1703BWG-7 is available at Aetrix Electronics and suitable for industrial controllers, portable medical devices, automotive body electronics, and smart energy meters requiring stable component supply and long-term legacy support.
Supply support for AP1703BWG-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, communications, and consumer markets with high-reliability, cost-optimized components.
The AP170x series belongs to Diodes' microprocessor supervisory product line, designed specifically for low-cost, single-function reset monitoring in space-constrained embedded systems operating from 1.0 V to 5.5 V.
FAQ
What is the exact reset threshold voltage for AP1703BWG-7?
The AP1703BWG-7 has a nominal reset threshold of 4.38 V, with a guaranteed range of 4.29 V to 4.47 V at 25°C. This value is laser-trimmed during production and exhibits 30 ppm/°C temperature coefficient, ensuring stability across –40°C to +105°C.
Can AP1703BWG-7 drive a 10 kΩ pull-up resistor on its RESET pin?
No-AP1703BWG-7 features a push-pull output and does not require an external pull-up. Its RESET pin actively drives low (≤0.4 V at 3.2 mA sink) and high (≥0.8×VCC at 800 µA source), eliminating reliance on external resistors and reducing power waste and noise susceptibility.
Is AP1703BWG-7 pin-compatible with AP1703AWG-7?
Yes-both share identical SC59-3L package, pinout (GND-VCC-RESET), and electrical specifications. The "B" suffix denotes 4.38 V threshold (vs. "A" = 4.63 V); "W" indicates SC59 package; "-7" confirms 3,000-piece tape-and-reel packaging. Only threshold voltage differs between AP1703AWG-7 and AP1703BWG-7.
Why is AP1703BWG-7 marked "Not Recommended for New Design"?
Diodes Incorporated issued this notice because the newer APX809/810 series offers improved specs: lower IQ (0.5 µA), tighter threshold tolerance (±0.5%), and enhanced ESD performance. AP1703BWG-7 remains fully functional and supported for existing designs but is not promoted for new schematics where long-term roadmap alignment matters.
AP1703BWG-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:
- 4.38V
- 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
AP1703BWG-7 FAQ
1.How can I place an order for AP1703BWG-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1703BWG-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 AP1703BWG-7 reliable?
The price and inventory of AP1703BWG-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1703BWG-7 is usually 5 days.
3.What payment methods are accepted for AP1703BWG-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1703BWG-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1703BWG-7?
AP1703BWG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1703BWG-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 AP1703BWG-7?
For technical support, including AP1703BWG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1703BWG-7 requirements.
6.How does Aetrix verify that AP1703BWG-7 is sourced from the original manufacturer or authorized distributors?
All AP1703BWG-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 AP1703BWG-7 meets industry standards.
7.What is the process for return or replacement of AP1703BWG-7?
All AP1703BWG-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP1703BWG-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 AP1703BWG-7 part is unused and in its original packaging.
Return procedure for AP1703BWG-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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