My Inquiry
My Account
Diodes Incorporated APX803S-46SR-7
- Part No.:
- APX803S-46SR-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX803S-46SR-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:1,782
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
APX803S-46SR-7 from Diodes Incorporated is a 3-pin SOT23 open-drain microprocessor reset supervisor IC with 4.63V ±0.07V reset threshold, 240ms minimum reset timeout, 10µA typical supply current, and guaranteed operation down to VCC = 1V. It monitors 5.0V power rails in embedded controllers and portable systems to prevent erroneous microprocessor startup during brownout or power-up transients.
For engineers reviewing the APX803S-46SR-7 datasheet, APX803S-46SR-7 pinout, APX803S-46SR-7 application, or APX803S-46SR-7 equivalent, key selection criteria include precise 4.63V threshold tolerance, open-drain active-low RESET output compatibility with bidirectional µP reset pins, 240ms timeout duration, low 10µA quiescent current for battery operation, and SOT23-SR package pin mapping.
Technical Context
The APX803S-46SR-7 implements a precision voltage comparator with 30ppm/°C tempco and internal timer circuitry that asserts RESET low when VCC falls below 4.63V and holds it for ≥240ms after VCC rises above threshold. Its open-drain output requires an external pull-up and supports level-shifting across supply domains.
Designed for single-supply monitoring, it ignores fast VCC transients and guarantees valid logic state (RESET = low) for VCC ≥ 1V. The device draws only 10µA at 3.3V and maintains reset assertion even during slow-rising VCC ramps (dVCC/dt ≤ 100 V/µs).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V (min 4.56V, max 4.70V) - precisely matches 5.0V rail monitoring with ±1.5% tolerance at +25°C |
| Reset Timeout | 240ms (min 140ms, max 280ms) - ensures sufficient hold time for full µP initialization after power recovery |
| Supply Current | 10µA (typical) - enables multi-year battery life in portable instrumentation and remote sensors |
| Operating Voltage Range | 1.0V to 5.5V - guarantees reset validity down to 1V VCC, supporting brownout detection before system collapse |
| Output Type | Open-drain active-low - allows wired-OR configuration, bidirectional µP reset pin interfacing, and flexible pull-up voltage selection |
| Tempco | 30ppm/°C - maintains threshold stability across -40°C to +85°C industrial temperature range |
| ESD Protection | 3kV HBM - provides robust handling margin during PCB assembly and field service |
Pinout & Package
SOT23-3 (SR variant) surface-mount package with 2.9mm × 1.3mm footprint, 0.95mm height, and gull-wing leads. RoHS-compliant, halogen-free, lead-free construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Reference ground return path for internal comparator and timer; must be connected to system ground plane |
| 2 | VCC | Primary power input; supplies internal circuitry and serves as monitored voltage source |
| 3 | RESET | Open-drain active-low output; sinks current when asserted, requires external pull-up resistor to target logic rail |
Key Features
| Feature | Design Value |
|---|---|
| Precision 4.63V threshold | ±0.07V tolerance ensures reliable detection of 5.0V rail undervoltage without false triggering |
| 240ms reset timeout | Guaranteed minimum hold time exceeds typical µP reset requirement specs (e.g., ARM Cortex-M, PIC18) |
| 10µA supply current | Enables direct integration into ultra-low-power wake-on-event architectures without burdening battery sources |
| VCC = 1V reset validity | Prevents metastable reset release during deep brownout, eliminating race conditions in low-VCC logic |
| Open-drain output | Supports mixed-voltage systems: e.g., monitor 5V rail while resetting 3.3V µP via shared pull-up to 3.3V |
Applications
| Industrial PLC Controllers | Portable Medical Monitors |
|---|---|
|
Use Scenario: Power sequencing in DIN-rail mounted programmable logic controllers with dual 5V/24V supplies. IC Role / Device Role / Timing Role: Monitors 5V logic rail and asserts reset to ARM-based controller until stable; 240ms timeout accommodates slow-start DC-DC converters. Use Value: Prevents firmware corruption during factory floor voltage sags by ensuring µP remains held in reset until all peripherals are fully powered. |
Use Scenario: Battery-powered ECG and SpO₂ devices requiring >5-year shelf life and instant-on capability. IC Role / Device Role / Timing Role: Supervises main 5V LDO output; triggers controlled shutdown and cold boot on battery voltage decay. Use Value: 10µA quiescent current extends battery runtime; 4.63V threshold aligns with end-of-discharge detection for Li-ion cells. |
| Network Edge Routers | Smart Energy Meters |
|
Use Scenario: Multi-rail power management in fanless enterprise switches with PoE+ backplane interfaces. IC Role / Device Role / Timing Role: Resets MIPS-based packet processor on 5V auxiliary rail failure; open-drain output interfaces with 3.3V FPGA reset domain. Use Value: Enables cross-rail reset coordination without level translators; 30ppm/°C tempco maintains accuracy across chassis thermal gradients. |
Use Scenario: ANSI C12.20-certified electricity meters operating in outdoor enclosures (-40°C to +85°C). IC Role / Device Role / Timing Role: Supervises 5V meter SoC supply; guarantees reset assertion during lightning-induced AC line dips. Use Value: 3kV HBM ESD rating withstands field electrostatic discharge; guaranteed operation to 1V prevents premature release during brownouts. |
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-46SA-7 | Push-pull active-low RESET output; identical 4.63V threshold and 240ms timeout | Eliminates need for external pull-up resistor but cannot share reset bus with other open-drain devices | Select when board layout lacks space for pull-up or when driving high-capacitance reset lines directly |
| MAX809SEUR+T | 4.63V threshold, 240ms timeout, push-pull output, 1.2µA supply current, −40°C to +125°C rating | Higher temperature grade and lower ICC suit automotive under-hood applications; different pinout (SOT23-3 SA vs SR) | Select for extended temperature environments where Diodes' −40°C to +85°C range is insufficient |
Compared with APX803S-46SR-7, the APX809S-46SA-7 simplifies BOM by removing the pull-up resistor but sacrifices bus-sharing capability, while the MAX809SEUR+T offers superior temperature range and ultra-low ICC at the cost of non-drop-in pin compatibility and higher unit price.
Availability
APX803S-46SR-7 is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical monitors, and smart energy meters requiring stable component supply with guaranteed long-term continuity.
Supply support for APX803S-46SR-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 APX803S series belongs to Diodes' supervisory IC product line, engineered specifically for cost-sensitive, space-constrained microprocessor reset applications requiring precision voltage monitoring and robust brownout immunity.
FAQ
What is the exact reset threshold voltage for APX803S-46SR-7?
The APX803S-46SR-7 has a nominal reset threshold of 4.63V, with guaranteed limits of 4.56V (minimum) and 4.70V (maximum) at +25°C. This 4.63V specification targets 5.0V power rails, providing a 7.4% undervoltage margin before reset activation.
Can APX803S-46SR-7 drive a reset line directly without a pull-up resistor?
No - the APX803S-46SR-7 features an open-drain RESET output and requires an external pull-up resistor to a valid logic rail (e.g., 3.3V or 5.0V). Without this resistor, the RESET signal cannot achieve a defined high state, causing undefined microprocessor behavior during normal operation.
How does the 240ms reset timeout behave during repeated voltage dips?
Each time VCC falls below the 4.63V threshold, the internal timer resets and restarts the 240ms countdown. RESET remains low continuously if VCC oscillates near the threshold, ensuring the microprocessor stays held in reset until VCC stabilizes above threshold for the full timeout period.
Is APX803S-46SR-7 compatible with bidirectional microcontroller reset pins?
Yes - its open-drain architecture allows direct connection to bidirectional µP reset pins (e.g., Motorola 68HC11, STM32, PIC18). A single pull-up resistor enables either the APX803S-46SR-7 or the µP itself to assert reset, supporting coordinated system-level recovery sequences.
APX803S-46SR-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:
- 4.63V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
APX803S-46SR-7 FAQ
1.How can I place an order for APX803S-46SR-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803S-46SR-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 APX803S-46SR-7 reliable?
The price and inventory of APX803S-46SR-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803S-46SR-7 is usually 5 days.
3.What payment methods are accepted for APX803S-46SR-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803S-46SR-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803S-46SR-7?
APX803S-46SR-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803S-46SR-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 APX803S-46SR-7?
For technical support, including APX803S-46SR-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803S-46SR-7 requirements.
6.How does Aetrix verify that APX803S-46SR-7 is sourced from the original manufacturer or authorized distributors?
All APX803S-46SR-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 APX803S-46SR-7 meets industry standards.
7.What is the process for return or replacement of APX803S-46SR-7?
All APX803S-46SR-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803S-46SR-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 APX803S-46SR-7 part is unused and in its original packaging.
Return procedure for APX803S-46SR-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
APX803S-46SR-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…
