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Diodes Incorporated APX803L20-48W5-7
- Part No.:
- APX803L20-48W5-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
APX803L20-48W5-7.pdf
- Description:
- Reset Generator SOT25 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:4,352
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Product details
Overview
APX803L20-48W5-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, providing precise 2.0V threshold detection with ±1.5% accuracy, 220ms reset timeout, open-drain active-low RESET output, and 1µA typical supply current. It monitors VCC in battery-powered IoT sensors, portable medical devices, and low-power microcontroller systems to ensure reliable power-on reset and brownout protection.
For engineers reviewing the APX803L20-48W5-7 datasheet, APX803L20-48W5-7 pinout, APX803L20-48W5-7 application, or APX803L20-48W5-7 equivalent, this page delivers verified technical context, package-specific pin mapping, real-world use cases, and validated alternative options - all grounded in Diodes' DS38171 Rev. 3–2 specification.
Technical Context
The APX803L20-48W5-7 implements a fixed-threshold voltage detector with internal 2.0V reference (±1.5% over temperature), hysteresis of 0.01×VTH, and temperature coefficient of 50 ppm/°C. Its reset assertion occurs within 20µs when VCC drops below 2.0V, and release requires VCC to exceed 2.01V (VTH_H = VTH_L + VHYS).
It features factory-programmed 220ms reset timeout (typ. 220ms, min 143ms, max 297ms across –40°C to +85°C), operates from 0.9V to 5.5V supply, and delivers 3.5mA sink capability at VOL ≤ 0.4V - enabling direct interface with µP reset inputs without external pull-ups.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Threshold Voltage | 2.0V ±1.5% - ensures accurate brownout detection for 2.0V logic rails and low-voltage microcontrollers. |
| Supply Current | 1.0µA (typ.), 2.5µA (max.) - enables multi-year operation in coin-cell-powered devices without measurable battery drain. |
| Reset Timeout | 220ms (typ.), 143–297ms range - provides sufficient hold time for slow-ramping power supplies and stable µP initialization. |
| Output Type | Open-drain, active-low - supports wired-OR reset bus architectures and flexible pull-up voltage selection (up to 5.5V). |
| Response Time | ≤20µs VCC drop-to-reset assertion - guarantees timely intervention before µP state corruption during fast transients. |
| Operating Temp | –40°C to +85°C - qualified for industrial and extended-temperature embedded applications. |
| Hysteresis | 0.01×VTH (20mV) - prevents chatter during noisy or slowly recovering supply conditions. |
Pinout & Package
SOT25 (5-pin) package with NC pins; pin 1 = VCC, pin 2 = RESET (open-drain), pin 3 = GND, pins 4–5 = NC. Designed for compact PCB layouts while maintaining isolation between power and reset signal paths.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Primary supply input; powers internal reference and comparator; must be decoupled with ≥100nF capacitor per datasheet. |
| 2 | RESET | Open-drain active-low output; requires external pull-up to host logic rail (e.g., 3.3V); sinks up to 3.5mA. |
| 3 | GND | Analog and digital ground reference; must connect to low-impedance system ground plane for noise immunity. |
| 4, 5 | NC | No connection; left floating per design; no internal bonding or circuitry attached. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 2.0V Threshold | Factory-trimmed internal reference eliminates need for external resistive divider, reducing BOM count and layout area. |
| 220ms Reset Timeout | Internally generated delay avoids external RC timing components and associated tolerance drift over temperature/lifetime. |
| 1µA Supply Current | Enables integration into always-on wake-up monitoring circuits without compromising system standby efficiency. |
| ±1.5% Threshold Accuracy | Meets tight reset window requirements for 2.0V-core SoCs and low-voltage FPGAs where margin is constrained. |
| Open-Drain Output | Allows shared reset bus across multiple ICs and compatibility with mixed-voltage domains (e.g., 1.8V µP with 3.3V pull-up). |
Applications
| Smart Wearable Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Continuous heart-rate monitoring using ultra-low-power MCU and analog front-end powered by CR2032 battery. IC Role / Device Role / Timing Role: Voltage detector asserts RESET until VCC stabilizes post-battery insertion or cold start, preventing firmware crash. Use Value: 1µA quiescent current extends battery life beyond 3 years; 220ms timeout accommodates slow LDO ramp-up. |
Use Scenario: Remote digital input module operating in harsh factory environments with fluctuating 24V DC supply. IC Role / Device Role / Timing Role: Monitors local 3.3V regulator output; triggers controlled µC reboot on undervoltage events caused by line sag or EMI. Use Value: ±1.5% threshold accuracy ensures consistent trip point across temperature; open-drain output interfaces directly with optocoupler-isolated reset chain. |
| Medical Infusion Pumps | Asset Tracking Beacons |
Use Scenario: Battery-backed safety-critical controller verifying main and backup supply integrity before motor activation. IC Role / Device Role / Timing Role: Dual-supply monitoring via separate APX803L20-48W5-7 instances; generates independent RESET signals for redundancy. Use Value: 20µs response time meets IEC 62304 Class C timing constraints; SOT25 package supports automated optical inspection (AOI) and high-reliability reflow. |
Use Scenario: GPS-enabled BLE beacon deployed in logistics containers with intermittent solar charging and Li-SOCl₂ primary cell. IC Role / Device Role / Timing Role: Detects 2.0V brownout during deep discharge; holds µP in reset until charge cycle restores safe operating voltage. Use Value: Hysteresis prevents oscillation during partial recharge; RoHS/Green compliance satisfies EU medical device directives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage detector applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| APX803L20-29SR | SOT23-3 package (3-pin), same 2.0V threshold and 220ms timeout, but lacks NC pins and has different thermal resistance (θJA = 200°C/W vs. SOT25's 200°C/W). | Preferred for space-constrained designs where 5-pin footprint is prohibitive; lower assembly cost but reduced thermal margin under sustained load. | Select when board area is critical and thermal dissipation <10mW; verify RESET rise time with higher pull-up values due to smaller bond wire. |
| TLV803S20DBZR | Texas Instruments part; 2.0V threshold, 200ms timeout (±20%), 0.5µA supply current, SOT23-3 package, push-pull output (not open-drain). | Requires redesign of reset bus topology due to push-pull output; better for single-load applications but incompatible with wired-OR configurations. | Choose only if open-drain functionality is unnecessary and lowest possible IQ is mandatory; validate µP reset pin compatibility with active-high assertion. |
Compared with APX803L20-48W5-7, the APX803L20-29SR offers identical electrical behavior in a smaller footprint but less routing flexibility, while the TLV803S20DBZR trades open-drain versatility for lower IQ and tighter timeout tolerance - making the SOT25 variant optimal for multi-drop reset buses in industrial modules.
Availability
APX803L20-48W5-7 is available at Aetrix Electronics and suitable for smart wearable sensors, industrial PLC I/O modules, and medical infusion pumps requiring stable component supply, long-lifecycle support, and RoHS-compliant sourcing.
Supply support for APX803L20-48W5-7 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 semiconductor company specializing in discrete, analog, and mixed-signal solutions, with manufacturing certified to IATF 16949 and quality systems aligned with AEC-Q standards.
The APX803L series targets ultra-low-power supervisory functions in battery-operated and energy-sensitive systems, emphasizing precision thresholding, minimal IQ, and robust reset timing - directly addressing design challenges in portable and industrial edge nodes.
FAQ
What is the exact reset timeout value for APX803L20-48W5-7 across temperature?
The APX803L20-48W5-7 guarantees a reset timeout of 143ms (min) to 297ms (max) over –40°C to +85°C ambient, with 220ms typical at +25°C. This is factory-programmed and tested per DS38171 Rev. 3–2, Figure 5, and does not require external components to set.
Can APX803L20-48W5-7 drive a 10kΩ pull-up to 5V?
Yes - its open-drain RESET output sinks up to 3.5mA at VOL ≤ 0.4V (per Electrical Characteristics table), supporting 10kΩ pull-up to 5V (0.5mA load) with margin. The datasheet confirms VOL remains ≤ 0.4V even at ISINK = 3.5mA and VCC = VTH – 0.2V.
Is the 2.0V threshold calibrated at wafer level or final test?
The 2.0V threshold is trimmed during final test at Diodes' production facility, achieving ±1.5% accuracy over temperature. This is confirmed in the Electrical Characteristics table (VTH parameter) and supported by the "High Threshold Voltage Accuracy" feature bullet in the datasheet.
Does APX803L20-48W5-7 require an input capacitor on VCC?
Yes - the datasheet specifies a 100nF ceramic capacitor between VCC and GND (see Typical Applications Circuit, page 3). This stabilizes the internal reference and prevents false resets during transient supply noise or rapid load switching.
APX803L20-48W5-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- -
- Type:
- Voltage Detector
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.8V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 143ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-25
APX803L20-48W5-7 FAQ
1.How can I place an order for APX803L20-48W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803L20-48W5-7 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 APX803L20-48W5-7 reliable?
The price and inventory of APX803L20-48W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803L20-48W5-7 is usually 5 days.
3.What payment methods are accepted for APX803L20-48W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L20-48W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803L20-48W5-7?
APX803L20-48W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803L20-48W5-7 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 APX803L20-48W5-7?
For technical support, including APX803L20-48W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L20-48W5-7 requirements.
6.How does Aetrix verify that APX803L20-48W5-7 is sourced from the original manufacturer or authorized distributors?
All APX803L20-48W5-7 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 APX803L20-48W5-7 meets industry standards.
7.What is the process for return or replacement of APX803L20-48W5-7?
All APX803L20-48W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L20-48W5-7, 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 APX803L20-48W5-7 part is unused and in its original packaging.
Return procedure for APX803L20-48W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
APX803L20-48W5-7 Tags
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MIC826SYMT-TR
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