My Inquiry
My Account
Diodes Incorporated APX803S05-44SA-7
- Part No.:
- APX803S05-44SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX803S05-44SA-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
APX803S05-44SA-7 from Diodes Incorporated is a 3-pin microprocessor reset supervisor IC with open-drain active-low RESET output, precision 4.38V (typ) reset threshold, 50ms (typ) reset timeout, and guaranteed operation down to VCC = 1V. It monitors 5.0V power rails in embedded microcontroller systems and asserts reset during power-up, brownout, or supply glitches.
For engineers reviewing the APX803S05-44SA-7 datasheet, APX803S05-44SA-7 pinout, APX803S05-44SA-7 application, or APX803S05-44SA-7 equivalent, key selection factors include reset threshold tolerance (±0.07V), low 10µA supply current, SOT23-3 SA package compatibility, and open-drain interface suitability for bidirectional µP reset pins.
Technical Context
The APX803S05-44SA-7 implements a precision bandgap-based voltage comparator with 30ppm/°C tempco and internal timer logic that initiates a fixed 50ms (typ) reset pulse after VCC rises above 4.38V. Its open-drain output requires an external pull-up and sinks up to 3.5mA at 0.4V low-level voltage.
It operates across –40°C to +85°C, guarantees valid reset assertion for VCC ≥ 1V, and rejects fast transients via dVCC/dt immunity up to 100V/µs. The device draws only 10µA (typ) supply current at 3.3V, enabling use in battery-powered instrumentation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.38V (typ), ±0.07V tolerance - ensures reliable detection of 5.0V rail undervoltage before µP instability occurs |
| Reset Timeout | 50ms (typ), 20–70ms (min–max) - provides sufficient hold time for full µP initialization after power recovery |
| Supply Current | 10µA (typ) at +25°C - enables multi-year operation in coin-cell–powered portable devices |
| VCC Operating Range | 1.0V to 5.5V - supports reset assertion even during deep brownout conditions where µP is nonfunctional |
| RESET Output Type | Open-drain active-low - allows wired-OR configuration with other supervisors and direct interface to bidirectional µP reset pins |
| Tempco | 30ppm/°C - maintains threshold stability over industrial temperature range without calibration |
| ESD Protection | HBM ±3kV - enhances robustness during board handling and system integration |
Pinout & Package
SOT23-3 (SA package), surface-mount, 2.9mm × 1.3mm footprint, 0.95mm height, thermal resistance θJA = 232°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal comparator and timer; must be low-impedance connection to system ground plane |
| 2 | VCC | Power supply input; monitors local 5.0V rail; powers internal circuitry down to 1.0V |
| 3 | RESET | Open-drain active-low output; requires external pull-up resistor to monitored or host supply; sinks ≤3.5mA |
Key Features
| Feature | Design Value |
|---|---|
| Precision 4.38V threshold | Guaranteed ±0.07V accuracy over temperature eliminates need for external trimming in 5V systems |
| 50ms reset timeout | Fixed delay ensures µP completes internal clock stabilization and register initialization before release |
| 10µA supply current | Reduces standby power budget impact in always-on monitoring applications such as smart sensors |
| VCC = 1V reset validity | Ensures deterministic reset state even during severe brownout-no floating output below operational voltage |
| Open-drain RESET | Enables level-shifting and shared reset bus architectures without logic contention or voltage translation ICs |
Applications
| Industrial PLC Controllers | Portable Medical Monitors |
|---|---|
|
Use Scenario: Microcontroller-based programmable logic controllers operating from unregulated 5V DC inputs subject to line fluctuations and transient dropouts. IC Role / Device Role / Timing Role: Supervises main 5V supply and asserts active-low reset to ARM Cortex-M4 core during brownout events lasting >100µs. Use Value: Prevents corrupted I/O state and firmware lockup by guaranteeing 50ms minimum reset hold time after VCC recovers above 4.38V. |
Use Scenario: Battery-powered ECG data loggers requiring ultra-low-power supervision during sleep mode and wake-up sequencing. IC Role / Device Role / Timing Role: Monitors regulated 5.0V rail derived from Li-ion battery; triggers reset if voltage sags below 4.38V due to high-current sensor activation. Use Value: 10µA quiescent current extends battery life beyond 3 years; open-drain output interfaces directly with MSP430F5xx bidirectional reset pin. |
| Automotive Body Control Modules | Networked Smart Sensors |
|
Use Scenario: CAN-connected BCMs powered from vehicle 5V rail exposed to load-dump and cold-crank transients. IC Role / Device Role / Timing Role: Provides glitch-immune reset assertion during dVCC/dt events up to 100V/µs; holds reset for 50ms after recovery. Use Value: Eliminates need for RC filter networks and reduces BOM count while meeting AEC-Q100 Class 2 temperature requirements. |
Use Scenario: Wireless environmental sensors deployed in remote locations with intermittent solar charging and 5V LDO regulation. IC Role / Device Role / Timing Role: Detects under-voltage on 5V supply caused by low-light battery depletion; asserts reset to prevent flash write corruption. Use Value: Guaranteed reset validity down to VCC = 1V ensures safe shutdown even as battery decays below µP operational voltage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| APX809S44SA-7 | Push-pull (not open-drain) RESET output; same 4.38V threshold and 50ms timeout | Requires no external pull-up; incompatible with wired-OR or bidirectional reset buses | Select when driving single-load CMOS reset inputs and minimizing external components |
| MAX809SEUR+T | 4.63V reset threshold (±2.5%); 140ms min timeout; 20µA supply current | Higher threshold tolerates tighter 5V rail regulation; longer timeout suits slower µPs | Select when system requires higher trip point margin or extended reset hold for FPGA configuration |
Compared with APX803S05-44SA-7, APX809S44SA-7 simplifies layout but sacrifices bus-sharing capability, while MAX809SEUR+T trades lower quiescent current for reduced timing precision and higher threshold-making the APX803S05-44SA-7 optimal for cost-sensitive, low-power, multi-device reset architectures.
Availability
APX803S05-44SA-7 is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical monitors, and automotive body control modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for APX803S05-44SA-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, designed specifically for cost-effective, low-power microprocessor reset functions in space-constrained embedded systems with strict voltage-monitoring requirements.
FAQ
What is the exact reset threshold voltage and its tolerance for APX803S05-44SA-7?
The APX803S05-44SA-7 has a nominal reset threshold of 4.38V at +25°C, with a guaranteed range of 4.31V to 4.45V across temperature and process variation. This 3.2% total tolerance ensures robust detection of 5.0V rail collapse without false triggering during normal ripple.
Can APX803S05-44SA-7 drive a reset line shared among multiple microcontrollers?
Yes-the open-drain RESET output allows direct wired-OR connection with other open-drain reset sources. A single pull-up resistor suffices for the shared bus, and any device asserting low will hold the entire line in reset, enabling coordinated system-level restarts.
Does APX803S05-44SA-7 remain functional when VCC drops below 1.0V?
No-while the RESET output is guaranteed valid (low) for VCC ≥ 1.0V, the device ceases internal operation below that voltage. At VCC < 1.0V, RESET becomes high-impedance and may float; however, this aligns with µP inactivity at such voltages, avoiding unintended behavior.
What is the maximum sink current capability of the RESET pin?
The RESET pin can sink up to 3.5mA while maintaining VOL ≤ 0.4V at VCC = VTH − 0.2V. This supports standard 4.7kΩ pull-up to 5V (1.06mA) or 10kΩ to 3.3V (0.33mA), ensuring noise-immune logic levels across common interface configurations.
APX803S05-44SA-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:
- 4.38V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 20ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
APX803S05-44SA-7 FAQ
1.How can I place an order for APX803S05-44SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803S05-44SA-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 APX803S05-44SA-7 reliable?
The price and inventory of APX803S05-44SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803S05-44SA-7 is usually 5 days.
3.What payment methods are accepted for APX803S05-44SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803S05-44SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803S05-44SA-7?
APX803S05-44SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803S05-44SA-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 APX803S05-44SA-7?
For technical support, including APX803S05-44SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803S05-44SA-7 requirements.
6.How does Aetrix verify that APX803S05-44SA-7 is sourced from the original manufacturer or authorized distributors?
All APX803S05-44SA-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 APX803S05-44SA-7 meets industry standards.
7.What is the process for return or replacement of APX803S05-44SA-7?
All APX803S05-44SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803S05-44SA-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 APX803S05-44SA-7 part is unused and in its original packaging.
Return procedure for APX803S05-44SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
APX803S05-44SA-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…
