My Inquiry
My Account
Diodes Incorporated APX803L40-48SA-7
- Part No.:
- APX803L40-48SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX803L40-48SA-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,934
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
APX803L40-48SA-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, providing precise 4.8V threshold detection with ±1.5% accuracy, 1µA typical supply current, 450ms reset timeout, and open-drain active-low RESET output in SOT23 package. It monitors VCC in battery-powered embedded systems to prevent malfunction during brownout conditions.
For engineers reviewing the APX803L40-48SA-7 datasheet, APX803L40-48SA-7 pinout, APX803L40-48SA-7 application, or APX803L40-48SA-7 equivalent, this device serves as a low-quiescent-current power-on reset supervisor with factory-fixed 4.8V detection and temperature-stable hysteresis for portable electronics, industrial controllers, and IoT edge nodes requiring reliable supply monitoring without external components.
Technical Context
The APX803L40-48SA-7 implements a precision bandgap-based voltage reference and comparator architecture to detect VCC falling below 4.8V (±1.5%), triggering an open-drain active-low RESET signal within 20µs. Its internal hysteresis (0.01×VTH) prevents oscillation near threshold and ensures clean release when VCC rises above 4.848V.
It integrates a fixed 450ms reset timeout period (typ.) after VCC recovery, independent of external timing components, and operates across –40°C to +85°C ambient with supply voltage range 0.9V–5.5V - enabling use in Li-ion powered devices and wide-input industrial rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Detection Threshold | 4.8V ±1.5% - factory-trimmed fixed voltage for reliable 5V rail supervision with minimal drift over temperature. |
| Supply Current | 1.0µA (typ.), 2.5µA (max.) - enables multi-year operation in coin-cell or energy-harvesting systems without measurable battery drain. |
| Reset Timeout | 450ms (typ.) - ensures sufficient hold time for µP initialization and peripheral stabilization after power recovery. |
| Output Type | Open-drain, active-low - supports wired-OR reset bus configurations and flexible pull-up voltage selection (up to 5.5V). |
| Response Time | 20µs max. - guarantees rapid fault detection to prevent corrupted memory writes or state machine lockup during brownout. |
| Operating Temp | –40°C to +85°C - validated for industrial and extended-temperature consumer applications without derating. |
| Hysteresis | 0.01×VTH (≈48mV) - eliminates chatter at threshold crossing while maintaining tight release point (VTH_H = 4.848V). |
Pinout & Package
SOT23-3 package (JEDEC TO-236AB), 1.3mm × 2.9mm × 1.0mm body, surface-mount, lead-free and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Reference ground return path; must be connected directly to system power plane for stable threshold accuracy. |
| 2 | RESET | Open-drain active-low reset output; requires external pull-up to logic rail (e.g., 3.3V or 5V) for µP reset assertion. |
| 3 | VCC | Power input pin; supplies internal circuitry and senses monitored voltage - no separate sense pin required. |
Key Features
| Feature | Design Value |
|---|---|
| No external components needed | Integrated reference, comparator, and delay timer eliminate capacitors, resistors, or trimming - reduces BOM count and PCB area. |
| Ultra-low quiescent current | 1µA typical supply draw enables integration into always-on subsystems without compromising battery life. |
| Factory-set 4.8V threshold | Eliminates design-in calibration effort and ensures consistent performance across production lots and temperature. |
| Robust ESD protection | ±4000V HBM rating protects against handling damage during assembly and field operation in unshielded environments. |
| Wide supply range | Operates down to 0.9V - supports supervision of partially discharged batteries or low-voltage logic rails. |
Applications
| Smartphone Power Sequencing | Industrial PLC I/O Module |
|---|---|
Use Scenario: Monitors main 4.8V PMIC output during cold start and brownout events in dual-battery smartphone designs. IC Role / Device Role / Timing Role: Voltage supervisor generating active-low reset pulse to ARM application processor and baseband SoC. Use Value: Prevents boot failure by holding reset until VCC stabilizes above 4.848V, with 450ms timeout ensuring full LDO settling before release. |
Use Scenario: Supervises 4.8V isolated auxiliary supply powering digital I/O drivers in DIN-rail mounted PLC modules. IC Role / Device Role / Timing Role: Fault-detection node asserting system-wide reset on undervoltage, interfacing with FPGA configuration logic. Use Value: Guarantees deterministic startup sequence and avoids metastability in fieldbus transceivers by enforcing minimum 450ms reset hold time. |
| Wireless Sensor Node | Medical Wearable Charger |
Use Scenario: Watches 4.8V boost converter output in BLE-enabled environmental sensor node powered by CR2032 coin cell. IC Role / Device Role / Timing Role: Low-power supervisor enabling wake-from-sleep reset recovery without increasing standby current budget. Use Value: 1µA supply current extends shelf life beyond 10 years; 20µs response prevents firmware corruption during transient dips. |
Use Scenario: Validates 4.8V regulated output from Qi receiver IC before enabling charging circuitry in compact wearable health monitor. IC Role / Device Role / Timing Role: Safety-critical enable gate for LiPo charge management IC, preventing unsafe charging under undervoltage. Use Value: ±1.5% threshold accuracy ensures compliance with IEC 62368-1 voltage validation requirements for medical battery systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803E48DBVR | 4.8V threshold, 1.8µA supply current, 200ms timeout, SOT23-3 | Lacks hysteresis specification; lower accuracy (±2.5%) and shorter timeout limit system compatibility. | Acceptable where tighter timing control is not required and higher current budget exists. |
| MAX809SEUR+T | 4.8V threshold, 10µA supply current, 240ms timeout, SOT23-3 | Higher quiescent current reduces battery life; no temperature-compensated hysteresis; older process node. | Only suitable for line-powered or short-duration portable applications where ultra-low power is noncritical. |
Compared with TLV803E48DBVR and MAX809SEUR+T, the APX803L40-48SA-7 delivers superior power efficiency (1µA vs. ≥1.8µA), longer and more stable reset timeout (450ms vs. ≤240ms), and tighter threshold accuracy (±1.5% vs. ±2.5% or worse), making it optimal for long-life battery systems demanding robust brownout immunity.
Availability
APX803L40-48SA-7 is available at Aetrix Electronics and suitable for smart consumer electronics, industrial automation controllers, and medical wearables requiring stable component supply with guaranteed long-term manufacturability.
Supply support for APX803L40-48SA-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 leadership in power management, signal integrity, and protection devices.
The APX803L series belongs to Diodes' µP supervisory product line, engineered specifically for ultra-low-power, high-accuracy reset generation in space-constrained, battery-sensitive applications such as IoT endpoints and portable medical devices.
FAQ
What is the exact reset timeout duration for APX803L40-48SA-7?
The APX803L40-48SA-7 provides a nominal 450ms reset active timeout period after VCC recovers above the threshold, with specified min/max values of 292ms and 608ms across temperature and process variation per DS38171 Rev. 3–2.
Can APX803L40-48SA-7 operate with a 3.3V supply rail?
Yes - the device operates with VCC from 0.9V to 5.5V and monitors its own supply pin. When used on a 3.3V rail, it asserts reset if VCC drops below 4.8V, which is impossible; thus it is only suitable for rails ≥4.8V, such as 5V or boosted 4.8V supplies.
Is an external pull-up resistor required on the RESET pin?
Yes - the RESET pin is open-drain and requires an external pull-up resistor to a valid logic voltage (e.g., 3.3V or 5V). Typical values range from 10kΩ to 100kΩ, selected based on rise time requirements and bus loading.
Does APX803L40-48SA-7 include hysteresis, and what is its value?
Yes - it features built-in hysteresis of 0.01×VTH (≈48mV), resulting in a release voltage of approximately 4.848V. This prevents oscillatory reset behavior during slow-rising or noisy supply conditions near the 4.8V threshold.
APX803L40-48SA-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:
- 4.8V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 292ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
APX803L40-48SA-7 FAQ
1.How can I place an order for APX803L40-48SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803L40-48SA-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 APX803L40-48SA-7 reliable?
The price and inventory of APX803L40-48SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803L40-48SA-7 is usually 5 days.
3.What payment methods are accepted for APX803L40-48SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L40-48SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803L40-48SA-7?
APX803L40-48SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803L40-48SA-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 APX803L40-48SA-7?
For technical support, including APX803L40-48SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L40-48SA-7 requirements.
6.How does Aetrix verify that APX803L40-48SA-7 is sourced from the original manufacturer or authorized distributors?
All APX803L40-48SA-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 APX803L40-48SA-7 meets industry standards.
7.What is the process for return or replacement of APX803L40-48SA-7?
All APX803L40-48SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L40-48SA-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 APX803L40-48SA-7 part is unused and in its original packaging.
Return procedure for APX803L40-48SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
APX803L40-48SA-7 Tags
-
MIC826SYMT-TR
Microchip Technology
-
APX803S-31SA-7
Diodes Incorporated
-
APX803L20-29SA-7
Diodes Incorporated
-
TPS3828-33DBVR
Texas Instruments
-
V6340RSP3B+
EM Microelectronic
-
EM6325CXSP5B-2.9+
EM Microelectronic
-
MCP120T-300I/TT
Microchip Technology
-
MCP130T-315I/TT
Microchip Technology
-
MCP120T-475I/TT
Microchip Technology
-
MCP111T-300E/TT
Microchip Technology
-
MCP120T-315I/TT
Microchip Technology
-
MCP809T-315I/TT
Microchip Technology
Tech Hub
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
