My Inquiry
My Account
Diodes Incorporated APX803S00-31SR-7
- Part No.:
- APX803S00-31SR-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX803S00-31SR-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,875
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
APX803S00-31SR-7 from Diodes Incorporated is a 3-pin SOT23 open-drain microprocessor reset supervisor IC designed for 3.08 V ±0.04 V supply monitoring with 1.7 ms typical reset timeout, guaranteed reset validity down to VCC = 1 V, and 10 µA typical supply current. It provides power-on and brownout reset assertion for embedded microcontrollers in portable and industrial systems.
For engineers reviewing the APX803S00-31SR-7 datasheet, APX803S00-31SR-7 pinout, APX803S00-31SR-7 application, or APX803S00-31SR-7 equivalent, key selection criteria include precise 3.08 V threshold tolerance (±0.04 V), open-drain active-low output compatibility with bidirectional µP reset pins, low 10 µA quiescent current for battery operation, and guaranteed reset assertion at VCC ≥ 1 V.
Technical Context
The APX803S00-31SR-7 integrates a precision voltage comparator with 30 ppm/°C tempco and an internal timer that asserts RESET low for ≥1 ms after VCC rises above 3.08 V, then holds for 1.7 ms typical timeout. Its open-drain output requires an external pull-up and sinks up to 3.5 mA at 0.4 V.
It operates across –40°C to +85°C ambient temperature, supports supply voltages from 1.0 V to 5.5 V, and ignores fast transients on VCC via built-in noise immunity. The device remains functional and guarantees correct logic state down to VCC = 1 V, with RESET floating when VCC < 1 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.04 V to 3.13 V (typ. 3.08 V) - ensures reliable reset assertion for 3.3 V systems with ±1.3% tolerance over temperature |
| Reset Timeout | 1 ms min / 1.7 ms typ / 3.3 ms max - provides sufficient hold time for µP initialization without excessive delay |
| Supply Current | 10 µA typ / 15 µA max - enables multi-year battery life in portable equipment |
| VCC Operating Range | 1.0 V to 5.5 V - supports operation during deep brownout and compatibility with 1.8 V–5 V logic domains |
| RESET Output Type | Open-drain active-low - allows wired-OR configuration and level-shifting across different supply rails |
| Reset Valid Down To | VCC = 1 V - guarantees deterministic reset behavior even as supply collapses |
| ESD Protection | 3 kV HBM - enhances robustness in handling and board assembly environments |
Pinout & Package
APX803S00-31SR-7 is housed in a RoHS-compliant, halogen-free SOT23-3 (SR package) with standard pinout: Pin 1 = GND, Pin 2 = VCC, Pin 3 = RESET (open-drain active-low).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Reference ground for internal comparator and timer; must be connected to system ground plane for stable threshold reference |
| 2 | VCC | Power input monitored by internal comparator; supplies bias current and powers internal circuitry |
| 3 | RESET | Open-drain active-low output; requires external pull-up resistor to target logic rail (e.g., µP VDD); sinks up to 3.5 mA |
Key Features
| Feature | Design Value |
|---|---|
| Precision 3.08 V threshold | ±0.04 V tolerance over –40°C to +85°C ensures consistent reset point across temperature for 3.3 V systems |
| 1.7 ms typical reset timeout | Guarantees minimum 1 ms assertion while avoiding unnecessary delays in fast-boot applications like portable instrumentation |
| 10 µA supply current | Enables >10-year battery life in coin-cell-powered devices such as smart sensors and wearables |
| Valid reset down to VCC = 1 V | Prevents metastability by maintaining defined logic state until supply fully collapses, improving system reliability |
| Open-drain output with 3.5 mA sink capability | Supports direct interface to bidirectional µP reset pins (e.g., Motorola 68HC11) and multi-rail level shifting |
Applications
| Industrial Controllers | Portable Medical Sensors |
|---|---|
Use Scenario: PLC I/O modules powered from 3.3 V rails subject to intermittent brownouts during factory line voltage fluctuations. IC Role / Device Role / Timing Role: Monitors VCC and asserts active-low RESET to halt firmware execution until stable 3.3 V is restored and held for ≥1.7 ms. Use Value: Prevents corrupted register writes and flash memory corruption during undervoltage events, reducing field failure rates. |
Use Scenario: Battery-powered glucose meters using CR2032 cells whose voltage drops from 3.3 V to 2.2 V over discharge cycle. IC Role / Device Role / Timing Role: Detects crossing below 3.08 V threshold and holds RESET low for 1.7 ms to force controlled shutdown before data loss. Use Value: Ensures complete EEPROM save of last measurement before power collapse, meeting ISO 13485 data integrity requirements. |
| Automotive Body Control Modules | Smart Home Hub Power Sequencing |
Use Scenario: 12 V automotive system with local 3.3 V LDO powering MCU; subjected to load-dump and cold-crank transients. IC Role / Device Role / Timing Role: Supervises 3.3 V rail and asserts RESET during dips below 3.08 V, ignoring sub-µs noise per dVCC/dt spec of 100 V/µs. Use Value: Eliminates false resets during engine cranking, improving ignition reliability and reducing warranty claims. |
Use Scenario: Multi-rail smart speaker hub with separate 3.3 V (MCU), 1.8 V (Wi-Fi SoC), and 5 V (USB) supplies requiring coordinated reset timing. IC Role / Device Role / Timing Role: Monitors primary 3.3 V rail and drives shared open-drain RESET net pulled up to 3.3 V, enabling synchronized boot across subsystems. Use Value: Avoids race conditions where Wi-Fi SoC boots before MCU configures its interface, eliminating connection retries and latency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| APX809S31-31SA-7 | Push-pull active-low RESET output; same 3.08 V threshold and 140–280 ms timeout (not 1.7 ms) | Requires no external pull-up; incompatible with wired-OR or level-shifted reset nets | Select when driving single-load µP with fixed 3.3 V rail and no need for multi-supply coordination |
| MAX809TRD3-T | 3.08 V threshold, push-pull output, 140 ms min timeout, 20 µA supply current | Lacks VCC = 1 V reset guarantee and has higher quiescent current; not suitable for ultra-low-power brownout detection | Select only if legacy MAXIM footprint compatibility is required and 1.7 ms timeout is not critical |
Compared with APX809S31-31SA-7 and MAX809TRD3-T, the APX803S00-31SR-7 uniquely delivers 1.7 ms timeout, open-drain flexibility, and guaranteed reset down to 1 V - making it optimal for portable, multi-rail, and fast-recovery systems where timing precision and interface versatility are essential.
Availability
APX803S00-31SR-7 is available at Aetrix Electronics and suitable for industrial controllers, portable medical sensors, automotive body control modules, and smart home hub power sequencing requiring stable component supply and long-term lifecycle support.
Supply support for APX803S00-31SR-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 demanding precision voltage monitoring and low-power operation across extended temperature ranges.
FAQ
What is the exact reset threshold voltage for APX803S00-31SR-7?
The APX803S00-31SR-7 has a guaranteed reset threshold range of 3.04 V to 3.13 V at +25°C, with a typical value of 3.08 V. This specification is maintained over the full operating temperature range (–40°C to +85°C) with a tempco of ≤30 ppm/°C, ensuring stable performance in varying thermal environments.
Does APX803S00-31SR-7 require an external pull-up resistor on the RESET pin?
Yes - the RESET pin is open-drain active-low and must be pulled up externally to the target logic rail (e.g., µP VDD). A typical value is 10 kΩ to 3.3 V. No internal pull-up exists; omission results in undefined logic state and failed reset assertion.
Can APX803S00-31SR-7 operate reliably below 1.0 V VCC?
No - the device guarantees correct RESET logic state only for VCC ≥ 1.0 V. Below 1.0 V, the internal circuitry ceases to function and RESET becomes high-impedance. This is intentional design behavior, as most µPs are nonfunctional below 1.0 V, eliminating risk of spurious release.
How does the 1.7 ms reset timeout differ from other APX803S variants?
The "00" suffix denotes the shortest timeout option: 1 ms minimum / 1.7 ms typical / 3.3 ms maximum. In contrast, standard APX803S variants (no suffix) provide ≥140 ms, and "05" variants offer ≥20 ms. This makes the "00" version ideal for fast-boot systems where prolonged reset delays impair user experience or real-time response.
APX803S00-31SR-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
APX803S00-31SR-7 FAQ
1.How can I place an order for APX803S00-31SR-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803S00-31SR-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 APX803S00-31SR-7 reliable?
The price and inventory of APX803S00-31SR-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803S00-31SR-7 is usually 5 days.
3.What payment methods are accepted for APX803S00-31SR-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803S00-31SR-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803S00-31SR-7?
APX803S00-31SR-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803S00-31SR-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 APX803S00-31SR-7?
For technical support, including APX803S00-31SR-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803S00-31SR-7 requirements.
6.How does Aetrix verify that APX803S00-31SR-7 is sourced from the original manufacturer or authorized distributors?
All APX803S00-31SR-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 APX803S00-31SR-7 meets industry standards.
7.What is the process for return or replacement of APX803S00-31SR-7?
All APX803S00-31SR-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803S00-31SR-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 APX803S00-31SR-7 part is unused and in its original packaging.
Return procedure for APX803S00-31SR-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
APX803S00-31SR-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…
