My Inquiry
My Account
Diodes Incorporated APX803S00-31SA-7
- Part No.:
- APX803S00-31SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX803S00-31SA-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:1,471
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
APX803S00-31SA-7 from Diodes Incorporated is a 3-pin SOT23 microprocessor reset supervisor IC with open-drain active-low RESET output, 3.08 V reset threshold (±0.05 V), 1.7 ms typical reset timeout, and guaranteed operation down to VCC = 1 V. It monitors 3.3 V digital power rails in embedded microcontroller systems and asserts reset during power-up, brownout, or supply glitches.
For engineers reviewing the APX803S00-31SA-7 datasheet, APX803S00-31SA-7 pinout, APX803S00-31SA-7 application, or APX803S00-31SA-7 equivalent, this page delivers verified electrical parameters, thermal behavior across –40°C to +85°C, SOT23-SA package layout, and design guidance for interfacing with bidirectional µP reset pins and multi-rail level-shifting.
Technical Context
The APX803S00-31SA-7 implements a precision voltage comparator with 30 ppm/°C tempco and internal 1.7 ms timeout timer, ensuring reliable reset assertion during VCC transients as fast as 100 V/µs. Its open-drain output sinks up to 3.5 mA at 0.4 V while consuming only 10 µA typical supply current.
It guarantees valid logic-low RESET output for VCC ≥ 1 V and enters high-impedance state below 1 V - eliminating need for external pull-up in most µP interfaces. The device ignores fast supply noise and supports direct connection to bidirectional reset pins via single external pull-up resistor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08 V (typical), ±0.05 V tolerance - precisely monitors 3.3 V supply rails without external calibration |
| Reset Timeout | 1.7 ms (typical) - ensures sufficient hold time for µP initialization after power-up or glitch recovery |
| Supply Current | 10 µA (typical) - enables use in battery-powered systems with minimal quiescent drain |
| VCC Operating Range | 1.0 V to 5.5 V - guarantees functional reset output even during deep brownout conditions |
| Output Type | Open-drain active-low - allows wired-OR configuration and level-shifting across different supply domains |
| Tempco | 30 ppm/°C - maintains threshold stability over full industrial temperature range (–40°C to +85°C) |
| ESD Protection | 3 kV HBM - provides robust handling in automated assembly and field environments |
Pinout & Package
SOT23-3 (SA package) surface-mount package with 2.4 mm × 1.3 mm footprint, 0.915 mm height, and standard JEDEC MO-178 compliant pad layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Reference ground for internal comparator and timer - must be connected directly to system ground plane |
| 2 | VCC | Power input pin - supplies internal circuitry and serves as monitored voltage source for reset detection |
| 3 | RESET | Open-drain active-low output - requires external pull-up resistor to define logic-high level and sink capability |
Key Features
| Feature | Design Value |
|---|---|
| Precision 3.08 V threshold | Enables accurate supervision of 3.3 V systems without trimming resistors or calibration |
| 1.7 ms fixed reset timeout | Meets µP minimum reset pulse width requirements for ARM Cortex-M0/M3 and PIC16F families |
| Valid reset down to VCC = 1 V | Ensures deterministic reset state during deep undervoltage events before system collapse |
| 10 µA supply current | Extends battery life in portable instrumentation and wireless sensor nodes beyond 5 years |
| Open-drain output stage | Supports shared reset bus with multiple supervisors and level translation between 1.8 V/3.3 V/5 V domains |
Applications
| Industrial PLC Controller | Portable Medical Monitor |
|---|---|
Use Scenario: Microcontroller-based programmable logic controller operating in factory-floor environments with fluctuating 3.3 V rail due to motor switching noise. IC Role / Device Role / Timing Role: Supervises 3.3 V VCC and asserts active-low RESET to prevent firmware corruption during 10–100 µs supply dips. Use Value: 30 ppm/°C tempco and 100 V/µs transient immunity ensure no false resets across –40°C to +70°C ambient. |
Use Scenario: Battery-powered ECG front-end with ultra-low-power MSP430F5xx MCU requiring guaranteed reset during Li-ion discharge from 4.2 V to 2.8 V. IC Role / Device Role / Timing Role: Monitors regulated 3.3 V supply derived from buck converter; asserts RESET when input drops below 3.08 V. Use Value: 10 µA quiescent current extends 200 mAh coin-cell runtime by >18 months versus higher-current alternatives. |
| Automotive Body Control Module | Smart Energy Meter |
Use Scenario: CAN-connected BCM powered from vehicle battery through LDO, subject to load-dump and cold-crank transients. IC Role / Device Role / Timing Role: Provides primary reset signal to Infineon AURIX TC234L; open-drain output interfaces directly with µP's bidirectional reset pin. Use Value: Guaranteed RESET validity down to VCC = 1 V prevents undefined boot states during cranking (battery sag to 6 V). |
Use Scenario: ANSI C12.20-compliant meter with dual-core ARM Cortex-A5 + Cortex-M4, requiring synchronized reset across both domains. IC Role / Device Role / Timing Role: Supervises 3.3 V rail feeding communication SoC and metrology ADC; RESET output pulled up to 1.8 V domain for level-shifted assertion. Use Value: Open-drain architecture enables single RESET net to control both voltage domains without level translators. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809SEUR+T | 3.08 V threshold, push-pull output, 240 ms timeout, 15 µA ICC | Requires no external pull-up but cannot share reset bus or level-shift | Select when board space prohibits pull-up resistor or when driving CMOS inputs directly |
| TPS3808G01DBVR | 3.08 V threshold, open-drain output, 200 ms timeout, adjustable via capacitor, 12 µA ICC | Timeout configurable from 20 ms to 10 s; larger SOT23-6 footprint | Select when system requires longer reset hold time or dynamic timeout adjustment |
Compared with MAX809SEUR+T and TPS3808G01DBVR, the APX803S00-31SA-7 offers the shortest fixed timeout (1.7 ms) and lowest quiescent current (10 µA) in a minimal 3-pin SOT23-SA package - ideal for space-constrained, low-power, and multi-supply reset architectures.
Availability
APX803S00-31SA-7 is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical monitors, automotive body control modules, and smart energy meters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for APX803S00-31SA-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 automotive 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 transient immunity.
FAQ
What is the exact reset threshold voltage for APX803S00-31SA-7?
The APX803S00-31SA-7 has a nominal reset threshold of 3.08 V, with guaranteed limits of 3.04 V (min) and 3.13 V (max) at +25°C. This value is laser-trimmed during production and exhibits ±0.05 V tolerance across the full –40°C to +85°C operating range.
Can APX803S00-31SA-7 drive a reset pin directly without an external pull-up resistor?
No - the APX803S00-31SA-7 features an open-drain RESET output and requires an external pull-up resistor to define the logic-high voltage level. Typical values range from 10 kΩ to 100 kΩ, connected to the target µP's VDDIO or compatible supply rail.
Does APX803S00-31SA-7 remain functional when VCC drops below 1.0 V?
No - the device guarantees valid RESET output only for VCC ≥ 1.0 V. Below 1.0 V, the internal circuitry ceases operation and RESET transitions to high-impedance; this is intentional and aligns with µP inactivity thresholds in most 3.3 V systems.
How does the 1.7 ms reset timeout compare to other APX803S variants?
The APX803S00-31SA-7 provides the shortest timeout in the family (1.7 ms typ.), optimized for fast-boot µPs like ARM Cortex-M0+. In contrast, APX803S-31SA-7 offers 240 ms (typ.) for legacy 8-bit MCUs, and APX803S05-31SA-7 provides 50 ms (typ.) for mid-speed applications.
APX803S00-31SA-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:
- 3.08V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 1ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
APX803S00-31SA-7 FAQ
1.How can I place an order for APX803S00-31SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803S00-31SA-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 APX803S00-31SA-7 reliable?
The price and inventory of APX803S00-31SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803S00-31SA-7 is usually 5 days.
3.What payment methods are accepted for APX803S00-31SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803S00-31SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803S00-31SA-7?
APX803S00-31SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803S00-31SA-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 APX803S00-31SA-7?
For technical support, including APX803S00-31SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803S00-31SA-7 requirements.
6.How does Aetrix verify that APX803S00-31SA-7 is sourced from the original manufacturer or authorized distributors?
All APX803S00-31SA-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 APX803S00-31SA-7 meets industry standards.
7.What is the process for return or replacement of APX803S00-31SA-7?
All APX803S00-31SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803S00-31SA-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 APX803S00-31SA-7 part is unused and in its original packaging.
Return procedure for APX803S00-31SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
APX803S00-31SA-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…
