My Inquiry
My Account
Diodes Incorporated APX803S-26SR-7
- Part No.:
- APX803S-26SR-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX803S-26SR-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
APX803S-26SR-7 from Diodes Incorporated is a 3-pin SOT23 open-drain microprocessor reset supervisor IC with 2.63 V reset threshold (typ.), 240 ms minimum reset timeout, 10 µA supply current (typ.), and guaranteed operation down to VCC = 1 V. It monitors 3.3 V digital systems and asserts active-low reset during power-up, brownout, or supply glitches in embedded controllers and portable equipment.
For engineers reviewing the APX803S-26SR-7 datasheet, APX803S-26SR-7 pinout, APX803S-26SR-7 application, or APX803S-26SR-7 equivalent, key selection criteria include reset threshold accuracy (±0.04 V), open-drain output compatibility with bidirectional µP reset pins, fixed 240 ms timeout, low-voltage validity (1 V), and SOT23-SR package footprint.
Technical Context
The APX803S-26SR-7 implements a precision bandgap-based voltage comparator with 30 ppm/°C tempco and internal timer logic that initiates a fixed 240 ms reset pulse after VCC rises above 2.63 V. Its open-drain RESET output requires an external pull-up and sinks up to 3.5 mA at 0.4 V.
It ignores fast transients on VCC (dVCC/dt ≤ 100 V/µs) and guarantees valid reset assertion for VCC ≥ 1 V. The device operates across –40°C to +85°C and draws only 10 µA typical supply current at 3.3 V, enabling battery-powered use.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.63 V (typ.), ±0.04 V tolerance - ensures reliable detection of 3.3 V supply brownout before µP instability |
| Reset Timeout | 240 ms (typ.) - provides sufficient hold time for full µP initialization and peripheral stabilization |
| Supply Current | 10 µA (typ.) - enables multi-year operation in coin-cell–powered IoT sensors and wearables |
| VCC Validity Range | 1.0 V to 5.5 V - supports reset assertion even during deep brownout, before system logic fails |
| Output Type | Open-drain, active-low - allows wired-OR reset bus sharing and level-shifting across supply domains |
| ESD Protection | 3 kV HBM - meets industrial IEC 61000-4-2 system-level robustness requirements |
| Operating Temp | –40°C to +85°C - qualified for automotive under-hood and industrial control cabinet environments |
Pinout & Package
SOT23-3 (SR variant) surface-mount package with 2.9 mm × 1.3 mm footprint, 0.95 mm height, and gull-wing leads. RoHS-compliant, halogen-free "Green" construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for comparator and timer; must be low-impedance connection to system ground plane |
| 2 | VCC | Power input monitored for reset condition; also powers internal circuitry; accepts 1.0–5.5 V |
| 3 | RESET | Open-drain active-low output; requires external pull-up resistor to host supply; sinks ≥1.2 mA at 0.3 V |
Key Features
| Feature | Design Value |
|---|---|
| Precision 2.63 V threshold | ±0.04 V tolerance over temperature ensures consistent 3.3 V rail monitoring without calibration |
| Fixed 240 ms timeout | Guaranteed minimum delay prevents premature µP release before clock stabilization and memory initialization |
| 1 V VCC validity | Resets remain asserted until VCC exceeds 1 V, covering full discharge recovery in battery-backed systems |
| Open-drain output | Enables shared reset bus with multiple supervisors or µP-initiated reset assertion via same line |
| 10 µA supply current | Reduces quiescent load on primary power rails in always-on subsystems like real-time clocks or wake-on-event logic |
Applications
| Industrial PLC Controllers | Portable Medical Monitors |
|---|---|
|
Use Scenario: Power sequencing and brownout recovery in DIN-rail mounted programmable logic controllers with dual 24 V DC and 5 V logic supplies. IC Role / Device Role / Timing Role: Supervises 5 V logic rail; asserts RESET until stable post-power-up and holds for 240 ms to allow FPGA configuration and I/O initialization. Use Value: Prevents spurious relay actuation or communication loss during factory floor voltage sags by guaranteeing deterministic reset timing. |
Use Scenario: Battery-powered ECG and SpO₂ monitors requiring ultra-low standby current and reliable wake-from-sleep reset. IC Role / Device Role / Timing Role: Monitors 3.3 V LDO output powering ARM Cortex-M0+ MCU; resets on battery voltage drop below 3.0 V. Use Value: Enables >3-year shelf life with CR2032 cell by drawing only 10 µA while maintaining fail-safe reset coverage down to 1 V. |
| Automotive Body Control Modules | Smart Home Hub Gateways |
|
Use Scenario: Reset supervision for microcontrollers managing door locks, lighting, and window controls in 12 V vehicle electrical systems. IC Role / Device Role / Timing Role: Tracks 3.3 V domain derived from buck converter; triggers reset during cold-crank (6 V dips) or load-dump transients. Use Value: Avoids firmware lockup during engine start by asserting reset for 240 ms after VCC recovers above 2.63 V. |
Use Scenario: Multi-protocol smart home hubs (Zigbee, Thread, Matter) with always-on Wi-Fi coexistence and OTA update capability. IC Role / Device Role / Timing Role: Ensures clean boot of dual-core application processor after power restoration following grid outage or UPS switchover. Use Value: Guarantees NAND flash controller and RF stack initialization completes before network rejoin attempts begin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| APX803S-26SA-7 | Same reset threshold (2.63 V) and timeout (240 ms), but SOT23-SA pinout (GND/RESET/VCC vs. GND/VCC/RESET) | Requires PCB layout revision due to swapped pin 2 and 3; incompatible with SR-footprint designs | Select SA only when redesigning board for alternate routing or legacy SA inventory reuse |
| TPS3808G26DBVR | 2.63 V threshold, 200 ms timeout, push-pull output, higher 15 µA ICC, wider –40°C to +125°C range | Eliminates external pull-up but cannot share reset bus; better for high-temp automotive under-hood use | Choose for push-pull simplicity and extended temperature, if open-drain bus sharing is not required |
Compared with APX803S-26SA-7, the SR variant offers identical electrical behavior with validated SOT23-SR footprint compatibility; versus TPS3808G26DBVR, it trades push-pull convenience for open-drain flexibility and lower quiescent current at the cost of requiring a pull-up resistor.
Availability
APX803S-26SR-7 is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical monitors, automotive body control modules, and smart home hub gateways requiring stable component supply and long-term production continuity.
Supply support for APX803S-26SR-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-sensitive, space-constrained microprocessor reset applications requiring precision voltage monitoring and guaranteed timing without external components.
FAQ
What is the exact reset threshold voltage for APX803S-26SR-7?
The APX803S-26SR-7 has a nominal reset threshold of 2.63 V at +25°C, with guaranteed min/max values of 2.59 V and 2.67 V across –40°C to +85°C. This value is laser-trimmed during production and specified with 30 ppm/°C temperature coefficient, ensuring stability across operating conditions without external calibration.
Can APX803S-26SR-7 drive a reset line shared with other devices?
Yes - its open-drain RESET output supports wired-OR configuration. Multiple APX803S-26SR-7 units or other open-drain reset sources (e.g., watchdog timers) can share one reset bus with a single pull-up resistor. This enables coordinated system-wide reset assertion without contention or voltage conflict.
Does APX803S-26SR-7 require an external capacitor for timing?
No - the 240 ms reset timeout is generated by an internal RC timer and requires no external components. Unlike adjustable reset ICs, the APX803S-26SR-7 achieves precise, repeatable timing with zero external parts, reducing BOM count and PCB area in compact designs.
How does APX803S-26SR-7 behave when VCC drops below 1 V?
Below 1 V, the internal circuitry ceases operation and the RESET pin transitions to high-impedance (open-circuit). It no longer actively pulls low, but this is intentional: most µPs are non-functional below 1 V, so reset assertion is no longer needed. External pull-up maintains defined logic state during deep undervoltage.
APX803S-26SR-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:
- 2.63V
- 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-26SR-7 FAQ
1.How can I place an order for APX803S-26SR-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803S-26SR-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-26SR-7 reliable?
The price and inventory of APX803S-26SR-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-26SR-7 is usually 5 days.
3.What payment methods are accepted for APX803S-26SR-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803S-26SR-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803S-26SR-7?
APX803S-26SR-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803S-26SR-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-26SR-7?
For technical support, including APX803S-26SR-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803S-26SR-7 requirements.
6.How does Aetrix verify that APX803S-26SR-7 is sourced from the original manufacturer or authorized distributors?
All APX803S-26SR-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-26SR-7 meets industry standards.
7.What is the process for return or replacement of APX803S-26SR-7?
All APX803S-26SR-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803S-26SR-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-26SR-7 part is unused and in its original packaging.
Return procedure for APX803S-26SR-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
APX803S-26SR-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…
