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Diodes Incorporated AP1702BWL-7
- Part No.:
- AP1702BWL-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AP1702BWL-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC59-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,292
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Product details
Overview
AP1702BWL-7 from Diodes Incorporated is a 3-pin active-high microprocessor reset supervisor IC in SC59 package, monitoring +4.38V supply with ±1.5% threshold accuracy, 240ms minimum reset timeout, 20µA typical supply current, and guaranteed valid reset output down to VCC = +1V. It serves as a power-on/brownout detector for embedded microcontrollers in portable and industrial systems.
For engineers reviewing the AP1702BWL-7 datasheet, AP1702BWL-7 pinout, AP1702BWL-7 application, or AP1702BWL-7 equivalent, key selection criteria include reset threshold tolerance, push-pull output drive capability, transient immunity, low-VCC reset validity, and RoHS-compliant SC59 packaging for space-constrained PCB layouts.
Technical Context
The AP1702BWL-7 implements a precision voltage comparator with internal reference and a monostable delay circuit to generate a minimum 240ms active-high RESET pulse upon VCC recovery above 4.38V. Its push-pull output drives CMOS inputs directly without external pull-up resistors.
Designed for immunity to fast VCC transients, it ignores negative glitches ≤100mV/100µs and guarantees correct logic state for VCC ≥1V. The reset threshold exhibits only 30ppm/°C tempco, ensuring stability across –40°C to +105°C operating junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.38V ±1.5% - precisely matches +4.5V nominal rails with margin for brownout detection before system failure |
| Reset Timeout | 240ms min - ensures µP completes full power stabilization before release from reset |
| Supply Current | 20µA typ. - enables use in battery-powered devices with multi-year standby life |
| VCC Validity Range | 1.0V to 5.5V - maintains defined RESET logic state even during deep brownout or partial power loss |
| Output Type | Push-pull active-high - eliminates need for external pull-up resistor and supports direct CMOS interface |
| Transient Immunity | 100mV/100µs glitch rejection - prevents false resets from switching noise or ESD-induced supply dips |
| Tempco | 30ppm/°C - limits threshold drift to <±15mV over full –40°C to +105°C range |
Pinout & Package
AP1702BWL-7 is housed in a lead-free SC59-3L (SOT-23 compatible) surface-mount package measuring 2.90–3.10mm × 1.50–1.70mm × 1.00–1.30mm, optimized for automated placement and reflow soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal comparator and output stage; must be low-impedance connection to system ground plane |
| 2 | VCC | Power supply input; monitors voltage level and powers internal circuitry; requires local 0.1µF bypass capacitor |
| 3 | RESET | Active-high push-pull reset output; sinks/source up to 1.2mA/0.8VCC respectively; connects directly to µP reset pin |
Key Features
| Feature | Design Value |
|---|---|
| Precision reset threshold | 4.38V ±1.5% at 25°C with 30ppm/°C tempco - eliminates manual calibration and supports tight supply-margin designs |
| No external components required | Self-contained supervisory function - reduces BOM count, PCB area, and qualification effort versus discrete RC reset solutions |
| Guaranteed reset validity to VCC = 1V | Ensures deterministic µP behavior during undervoltage conditions where core logic may still be active but unstable |
| Push-pull output architecture | Drives high-impedance CMOS inputs without pull-up resistors - simplifies layout and avoids weak-drive timing uncertainty |
| Lead-free & RoHS-compliant | SC59-3L package with green finish per EU Directive Annex Notes 5 and 7 - meets global environmental compliance requirements |
Applications
| Industrial PLC Controllers | Portable Medical Monitors |
|---|---|
Use Scenario: Power sequencing and brownout protection in DIN-rail mounted programmable logic controllers exposed to 24VDC field supply fluctuations. IC Role / Device Role / Timing Role: Voltage supervisor asserting active-high RESET to ARM Cortex-M7 MCU during VCC dip below 4.38V, holding reset for ≥240ms after recovery. Use Value: Prevents corrupted I/O register writes and firmware lockup during factory floor voltage sags, improving system MTBF by eliminating uncontrolled restarts. |
Use Scenario: Battery-backed vital signs monitor requiring reliable cold-start and low-power sleep/wake cycles. IC Role / Device Role / Timing Role: Reset generator ensuring MSP430F5xx MCU enters known state on Li-ion battery wake-up from <10µA shutdown mode. Use Value: 20µA quiescent current extends battery life >3 years; 1V VCC validity enables early reset assertion before analog front-end becomes unstable. |
| Automotive Body Control Modules | Smart Energy Meters |
Use Scenario: Supervision of 5V domain powering CAN transceivers and microcontroller in non-safety-critical body electronics. IC Role / Device Role / Timing Role: Monitoring switched 5V rail derived from vehicle battery; asserts RESET on ignition-on voltage ramp and during load-dump transients. Use Value: Push-pull output withstands automotive EMI; 100µs glitch immunity prevents spurious resets from alternator ripple or relay switching noise. |
Use Scenario: Tamper-resistant electricity meter with metrology SoC requiring deterministic boot after power interruption or RF interference. IC Role / Device Role / Timing Role: Detecting AC-DC converter output sag during grid flicker events and holding metrology processor in reset until stable 3.3V rail is confirmed. Use Value: 4.38V threshold aligns with 5V auxiliary supply derating; 240ms timeout exceeds EN50470-3 power-fail hold-up time requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| APX809S-43SA-7 | Same 4.3V threshold, SOT23-3 package, 140ms reset timeout, 1.6µA max ICC | Lower supply current but shorter timeout - insufficient for slow-ramping µP clocks or DDR memory initialization | Select when ultra-low power dominates timing margin; verify µP reset hold-time compliance |
| TPS3808G33DBVR | 4.32V threshold, 200ms timeout, 1.8µA ICC, enable input, higher cost | Enable pin allows software-controlled reset assertion; not drop-in due to pin 1 functional difference | Choose when system-level reset coordination (e.g., FPGA + µP sync) is required beyond basic power monitoring |
Compared with APX809S-43SA-7 and TPS3808G33DBVR, AP1702BWL-7 provides longer reset assertion (240ms vs. 140ms/200ms) critical for legacy µPs with slow clock startup, while maintaining industry-standard SC59 footprint and proven transient immunity in harsh environments.
Availability
AP1702BWL-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 production continuity.
Supply support for AP1702BWL-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 AP170x series belongs to Diodes' microprocessor supervisory product line, engineered specifically for cost-sensitive, space-constrained applications requiring precise, low-power reset functionality without external components.
FAQ
What is the exact reset threshold voltage for AP1702BWL-7 and how is it specified over temperature?
The AP1702BWL-7 has a nominal reset threshold of 4.38V at 25°C, with ±1.5% initial tolerance and a temperature coefficient of 30ppm/°C. Over the full –40°C to +105°C operating junction range, the threshold varies by less than ±15mV, ensuring consistent brownout detection across environmental extremes.
Can AP1702BWL-7 drive a standard CMOS microcontroller reset pin directly without external components?
Yes. Its push-pull active-high RESET output sources up to 800µA at VCC – 1.5V and sinks up to 1.2mA at 0.4V, meeting standard CMOS input drive requirements. No external pull-up resistor is needed, reducing component count and PCB area while guaranteeing clean logic transitions.
Is AP1702BWL-7 suitable for automotive applications despite being labeled "Not Recommended for New Design"?
While Diodes recommends APX809/810 for new designs, AP1702BWL-7 remains qualified for automotive body electronics per its –40°C to +105°C operating range, 100µs glitch immunity, and AEC-Q200-compatible SC59 package. It is used in production ECUs where legacy design validation and supply chain continuity are prioritized.
How does the 240ms reset timeout benefit system reliability compared to shorter alternatives?
The 240ms minimum timeout ensures the microcontroller's internal oscillators, PLLs, and memory interfaces fully stabilize before release from reset. This prevents race conditions during boot, especially in systems with slow-ramping power supplies or external clock sources, thereby eliminating intermittent startup failures observed with 140ms or 200ms alternatives.
AP1702BWL-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 High
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-59-3
AP1702BWL-7 FAQ
1.How can I place an order for AP1702BWL-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1702BWL-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 AP1702BWL-7 reliable?
The price and inventory of AP1702BWL-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1702BWL-7 is usually 5 days.
3.What payment methods are accepted for AP1702BWL-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1702BWL-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1702BWL-7?
AP1702BWL-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1702BWL-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 AP1702BWL-7?
For technical support, including AP1702BWL-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1702BWL-7 requirements.
6.How does Aetrix verify that AP1702BWL-7 is sourced from the original manufacturer or authorized distributors?
All AP1702BWL-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 AP1702BWL-7 meets industry standards.
7.What is the process for return or replacement of AP1702BWL-7?
All AP1702BWL-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP1702BWL-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 AP1702BWL-7 part is unused and in its original packaging.
Return procedure for AP1702BWL-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AP1702BWL-7 Tags
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MIC826SYMT-TR
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