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Diodes Incorporated APX803L05-49SA-7
- Part No.:
- APX803L05-49SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX803L05-49SA-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,980
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Product details
Overview
APX803L05-49SA-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, providing precise 5.0 V threshold detection with ±1.5% accuracy, 1 µA typical supply current, and 55 ms reset timeout. It features open-drain active-low RESET output and operates across –40°C to +85°C in battery-powered instrumentation and portable electronics.
For engineers reviewing the APX803L05-49SA-7 datasheet, APX803L05-49SA-7 pinout, APX803L05-49SA-7 application, or APX803L05-49SA-7 equivalent, key selection criteria include threshold voltage tolerance, reset delay stability over temperature, low-quiescent-current impact on system battery life, and SOT23 package compatibility with high-density PCB layouts.
Technical Context
The APX803L05-49SA-7 implements a precision bandgap-based voltage reference with internal hysteresis (0.01 × VTH) to prevent oscillation during power-up/power-down transitions. Its comparator continuously monitors VCC against a fixed 5.0 V threshold and asserts RESET when VCC drops below that level.
Reset assertion is sustained until VCC exceeds the release threshold (VTH_H = VTH_L + VHYS), after which the open-drain output releases within 20 µs. The device requires no external components and supports direct connection to µP reset inputs with pull-up resistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Threshold Voltage | 5.0 V ±1.5% - ensures reliable reset initiation at nominal system supply rails without margin-induced false triggers. |
| Supply Current | 1.0 µA (typ.), 2.5 µA (max.) - enables multi-year operation in coin-cell–powered devices without measurable battery drain. |
| Reset Timeout | 55 ms - provides sufficient hold time for µP initialization while avoiding excessive system boot delays. |
| Response Time | 20 µs - guarantees rapid reset assertion during fast VCC collapse, critical for data integrity in volatile memory systems. |
| Operating Temp | –40°C to +85°C - validated for industrial and extended-temperature portable equipment environments. |
| Output Type | Open-drain, active-low - allows wired-OR configuration with multiple supervisors and flexible pull-up voltage selection. |
| Hysteresis | 0.01 × VTH (50 mV) - prevents chatter near threshold during noisy or slowly recovering supplies. |
Pinout & Package
SOT23-3 package (JEDEC TO-236AB), 1.3 mm × 2.9 mm × 1.0 mm body, gull-wing leads, RoHS-compliant matte tin lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Reference ground return path for internal comparator and voltage reference; must be connected to system power ground plane. |
| 2 | RESET | Open-drain active-low reset output; requires external pull-up resistor (typically 10 kΩ) to host logic rail (e.g., 3.3 V or 5 V). |
| 3 | VCC | Power supply input; monitors system rail directly; valid range 0.9 V to 5.5 V; powers internal circuitry and reference. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 5.0 V Threshold | Factory-trimmed internal reference eliminates need for external resistor dividers or calibration, reducing BOM count and layout area. |
| Low 1 µA Supply Current | Minimizes standby power draw in always-on monitoring applications such as IoT sensors and smart meters. |
| 55 ms Reset Timeout | Guarantees µP reset pulse meets minimum assertion time requirements of ARM Cortex-M and PIC microcontrollers. |
| ±1.5% Threshold Accuracy | Reduces design margin overhead versus looser-tolerance detectors, enabling tighter system supply regulation. |
| No External Components | Enables single-component solution for basic power-on reset, simplifying qualification and reducing failure modes. |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Battery-powered glucose monitor with BLE radio and LCD display requiring guaranteed reset on cold-start and brownout. IC Role / Device Role / Timing Role: Primary supervisor IC asserting active-low RESET to MSP430F5xx MCU upon VBAT drop below 5.0 V. Use Value: 1 µA quiescent current extends CR2032 battery life beyond 2 years; 55 ms timeout satisfies TI MCU reset timing spec. |
Use Scenario: DIN-rail mounted analog input module operating from 24 VDC supply with local 5 V LDO powering FPGA and ADC. IC Role / Device Role / Timing Role: Secondary supervisor monitoring 5 V rail downstream of LDO to detect regulator fault or load dump. Use Value: ±1.5% threshold accuracy avoids nuisance resets during normal 5 V ±3% ripple; SOT23 footprint fits constrained board space. |
| Smart Home Hub Controllers | Automotive Body Control Units |
Use Scenario: Wi-Fi–enabled home automation hub powered by USB-C PD (5 V) with dual-core application processor and PMIC. IC Role / Device Role / Timing Role: Dedicated 5 V supply monitor feeding reset input of NXP i.MX RT1060, independent of PMIC's internal reset generator. Use Value: Open-drain output allows co-location with other reset sources via wired-OR; 20 µs response prevents firmware lockup during transient dips. |
Use Scenario: 12 V–to–5 V converted subsystem in BCM managing door locks, lighting, and CAN transceivers. IC Role / Device Role / Timing Role: Redundant voltage monitor verifying stable 5 V for microcontroller and LIN transceivers post-LDO. Use Value: –40°C to +85°C rating matches automotive cabin ambient; hysteresis prevents cycling during engine cranking transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803E50DBVR | 5.0 V threshold, ±2.5% accuracy, 350 ns propagation delay, 0.5 µA ICC, SOT23-3 | Higher speed but looser threshold tolerance; lacks factory-programmed 55 ms delay (requires external RC) | Prefer when ultra-fast reset response is prioritized over tight voltage margin control. |
| MAX809SEUR+T | 5.0 V threshold, ±2.0% accuracy, 140 ms reset timeout, 12 µA ICC, SOT23-3 | Higher supply current and longer timeout; wider temp range (–40°C to +125°C) | Choose only if extended temperature operation beyond +85°C is required and higher ICC is acceptable. |
Compared with TLV803E50DBVR and MAX809SEUR+T, the APX803L05-49SA-7 delivers superior threshold accuracy and lower quiescent current while offering a precisely trimmed 55 ms delay-making it optimal for cost-sensitive, battery-constrained designs where reset timing and voltage margin are tightly coupled.
Availability
APX803L05-49SA-7 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart home hub controllers, and automotive body control units requiring stable component supply across production lifecycles.
Supply support for APX803L05-49SA-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 ICs, with manufacturing certified to IATF 16949 and quality systems aligned with AEC-Q200 for automotive-grade reliability.
The APX803L series belongs to Diodes' µP Supervisory IC product line, engineered specifically for low-power, high-accuracy reset generation in space- and energy-constrained embedded systems.
FAQ
What is the exact reset threshold voltage for APX803L05-49SA-7?
The APX803L05-49SA-7 has a factory-trimmed reset threshold of 5.0 V with ±1.5% accuracy over temperature (–40°C to +85°C), meaning the actual trip point falls between 4.925 V and 5.075 V at +25°C and remains within ±1.5% across its full operating range.
Can APX803L05-49SA-7 drive a 10 kΩ pull-up resistor to 3.3 V?
Yes-the device's open-drain RESET output is rated for 20 mA sink current and guarantees VOL ≤ 0.4 V at ISINK = 3.5 mA. With a 10 kΩ pull-up to 3.3 V, sink current is ~330 µA, well within specification and ensuring robust low-level signaling.
Does APX803L05-49SA-7 require an external capacitor for stability?
No-APX803L05-49SA-7 is internally compensated and requires no external capacitors. The datasheet confirms "No External Components Required," and typical application circuits show only a 100 nF bypass capacitor on VCC for general noise suppression, not for device stability.
Is APX803L05-49SA-7 qualified for automotive use?
No-APX803L05-49SA-7 is specified for industrial temperature range (–40°C to +85°C) and is not AEC-Q100 qualified. Diodes offers automotive-grade variants (e.g., APX803L05-49SA-7Q) with PPAP documentation and IATF 16949 manufacturing, but this specific part number is for commercial/industrial applications only.
APX803L05-49SA-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:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.9V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 35ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
APX803L05-49SA-7 FAQ
1.How can I place an order for APX803L05-49SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803L05-49SA-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 APX803L05-49SA-7 reliable?
The price and inventory of APX803L05-49SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803L05-49SA-7 is usually 5 days.
3.What payment methods are accepted for APX803L05-49SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L05-49SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803L05-49SA-7?
APX803L05-49SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803L05-49SA-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 APX803L05-49SA-7?
For technical support, including APX803L05-49SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L05-49SA-7 requirements.
6.How does Aetrix verify that APX803L05-49SA-7 is sourced from the original manufacturer or authorized distributors?
All APX803L05-49SA-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 APX803L05-49SA-7 meets industry standards.
7.What is the process for return or replacement of APX803L05-49SA-7?
All APX803L05-49SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L05-49SA-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 APX803L05-49SA-7 part is unused and in its original packaging.
Return procedure for APX803L05-49SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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