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Diodes Incorporated AP1704BWG-7
- Part No.:
- AP1704BWG-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AP1704BWG-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC59-3
- Quantity:
- Payment:
- Shipping:
Inventory:6,000
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Product details
Overview
AP1704BWG-7 from Diodes Incorporated is a 3-pin active-high microprocessor reset supervisor IC in SC59 package, with 4.38V reset threshold, 240ms minimum reset timeout, 20µA typical supply current, and guaranteed reset validity down to VCC = +1V. It monitors +5V/+3.3V digital power rails in embedded controllers and portable equipment.
For engineers reviewing the AP1704BWG-7 datasheet, AP1704BWG-7 pinout, AP1704BWG-7 application, or AP1704BWG-7 equivalent, key selection criteria include reset threshold accuracy (±0.09V), push-pull output drive capability (800µA source), transient immunity (100µs/100mV glitch rejection), and operation over –40°C to +105°C junction temperature.
Technical Context
The AP1704BWG-7 implements a precision voltage comparator with internal bandgap reference and a monostable delay circuit to generate a minimum 240ms active-high RESET pulse after VCC rises above 4.38V. Its push-pull output eliminates external pull-up resistors and ensures defined logic states across full VCC range (1.0–5.5V).
Designed for brownout detection, it ignores fast VCC transients ≤100µs when undershooting the threshold by ≤100mV. The reset comparator's 30ppm/°C tempco maintains threshold stability across industrial temperature range without calibration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.38V ±0.09V at 25°C - ensures reliable reset assertion before +5V system brownout reaches 4.29V |
| Reset Timeout | 240ms min - guarantees µP initialization completes before firmware execution begins |
| Supply Current | 20µA typ. - enables multi-year battery life in portable monitoring devices |
| VCC Operating Range | 1.0V to 5.5V - supports valid reset output even during deep brownout recovery |
| Output Drive | 800µA source / 3.2mA sink - directly interfaces with CMOS µP reset inputs without external buffering |
| Transient Immunity | 100µs max glitch duration at 100mV undershoot - prevents false resets from switching noise |
| Tempco | 30ppm/°C - limits threshold drift to ±12mV over –40°C to +105°C |
Pinout & Package
AP1704BWG-7 uses the SC59-3L (SOT-23 compatible) 3-pin surface-mount package with gull-wing leads, 2.90–3.10mm body length, and 1.90mm width per JEDEC MO-178AB.
| 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 | RESET | Active-high push-pull output; drives high to VCC–1.5V at 800µA, low to 0.4V at 3.2mA sink |
| 3 | VCC | Power input; supplies internal reference and output driver; bypass with 0.1µF capacitor adjacent to pin |
Key Features
| Feature | Design Value |
|---|---|
| Precision reset threshold | 4.38V ±0.09V - eliminates need for external resistor divider calibration in +5V systems |
| Guaranteed reset validity to VCC = 1V | Ensures deterministic µP state during partial power collapse, avoiding undefined boot behavior |
| No external components required | Integrates reference, comparator, timer, and push-pull driver - reduces BOM count and PCB area |
| Lead-free and RoHS-compliant | Meets EU Directive Annex exemptions for high-temp solder; green package marking per Diodes Inc. spec |
| Industrial temperature range | –40°C to +105°C operation - qualified for automotive under-hood and industrial control environments |
Applications
| Computers | Portable/Battery Powered Equipment |
|---|---|
Use Scenario: Desktop motherboard power sequencing during cold start and AC loss recovery. IC Role / Device Role / Timing Role: Active-high reset supervisor asserting RESET for ≥240ms after +5V rail stabilizes above 4.38V. Use Value: Prevents CPU instruction corruption by ensuring clock and memory initialization complete before firmware fetch. | Use Scenario: Handheld medical monitor operating on single Li-ion cell with buck-boost regulator. IC Role / Device Role / Timing Role: Monitors regulated +3.3V supply; asserts RESET if voltage sags below 4.38V × (3.3/5.0) ≈ 2.89V due to battery depletion. Use Value: 20µA quiescent current extends battery runtime; 1V VCC operation allows reset assertion until battery drops below 2.8V. |
| Controllers | Automotive |
Use Scenario: PLC I/O module subjected to 12V bus transients during relay switching. IC Role / Device Role / Timing Role: Detects sustained undervoltage on +5V logic rail; rejects <100µs glitches from inductive kickback. Use Value: Push-pull output drives isolated gate driver reset input without pull-up resistor, reducing component count and EMI susceptibility. | Use Scenario: Infotainment head unit exposed to load-dump and cold-crank conditions. IC Role / Device Role / Timing Role: Supervises +5V MCU supply; maintains valid RESET signal down to VCC = 1V during cranking (battery dips to 6V). Use Value: 30ppm/°C tempco ensures reset threshold stays within ±12mV across under-hood temperatures, preventing spurious reboots. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| APX810S24-7 | 4.40V threshold, 140ms timeout, 1.6µA supply current, SOT23-3 | Lower power but shorter timeout; requires external pull-up for open-drain output | Select for ultra-low-power battery applications where 140ms reset suffices and board space permits pull-up resistor |
| TPS3808G125DBVR | 1.25V adjustable threshold via external resistor, 200ms timeout, 12µA supply, SOT23-6 | Requires two external resistors; supports custom thresholds not available in fixed-voltage AP170x series | Select when system requires non-standard reset voltage (e.g., 2.85V for +3.3V LDO with 15% tolerance) |
Compared with APX810S24-7 and TPS3808G125DBVR, AP1704BWG-7 offers higher reset timeout margin (240ms vs. 140/200ms) and integrated push-pull drive-eliminating external components-but consumes more quiescent current than APX810 and lacks adjustable threshold flexibility of TPS3808.
Availability
AP1704BWG-7 is available at Aetrix Electronics and suitable for computers, controllers, portable/battery powered equipment requiring stable component supply and long-term industrial availability.
Supply support for AP1704BWG-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, headquartered in Plano, Texas, with design centers across Asia and manufacturing in China, Taiwan, and the US.
The AP170x series belongs to Diodes' microprocessor supervisory product line, designed specifically for cost-sensitive, space-constrained embedded systems requiring precise, low-power reset functionality without external components.
FAQ
What is the function of the RESET pin on AP1704BWG-7?
The RESET pin is an active-high push-pull output that drives high (VCC–1.5V at 800µA) when VCC exceeds 4.38V and remains high for ≥240ms, then drives low (≤0.4V at 3.2mA) when VCC falls below 4.38V. It directly connects to the microprocessor's reset input without external pull-up resistors.
Can AP1704BWG-7 operate with a 3.3V supply?
No - AP1704BWG-7 has a fixed 4.38V reset threshold optimized for +5V systems. When used with 3.3V rails, it will assert reset continuously since VCC never reaches the threshold. For +3.3V systems, AP1703BWG-7 (3.08V threshold) or APX809S33-7 (3.08V) are appropriate alternatives.
How does AP1704BWG-7 handle power supply transients?
It rejects negative-going VCC transients ≤100µs duration when undershooting the 4.38V threshold by ≤100mV, per its glitch immunity specification. This is achieved via internal comparator hysteresis and timing circuitry - no external RC filtering is needed for typical digital switching noise.
Is AP1704BWG-7 pin-compatible with APX810S24-7?
No - AP1704BWG-7 uses SC59-3L (SOT-23 variant) with pin 1=GND, pin 2=RESET, pin 3=VCC; APX810S24-7 uses standard SOT23-3 with pin 1=VCC, pin 2=GND, pin 3=RESET. Layout redesign and netlist updates are required for substitution.
AP1704BWG-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
AP1704BWG-7 FAQ
1.How can I place an order for AP1704BWG-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1704BWG-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 AP1704BWG-7 reliable?
The price and inventory of AP1704BWG-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1704BWG-7 is usually 5 days.
3.What payment methods are accepted for AP1704BWG-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1704BWG-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1704BWG-7?
AP1704BWG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1704BWG-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 AP1704BWG-7?
For technical support, including AP1704BWG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1704BWG-7 requirements.
6.How does Aetrix verify that AP1704BWG-7 is sourced from the original manufacturer or authorized distributors?
All AP1704BWG-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 AP1704BWG-7 meets industry standards.
7.What is the process for return or replacement of AP1704BWG-7?
All AP1704BWG-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP1704BWG-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 AP1704BWG-7 part is unused and in its original packaging.
Return procedure for AP1704BWG-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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