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Diodes Incorporated APX809S00-23SR-7
- Part No.:
- APX809S00-23SR-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX809S00-23SR-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:4,957
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Product details
Overview
APX809S00-23SR-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory functions in digital systems. It monitors +2.25V supply rails, asserts an active-low reset signal when VCC drops below 2.25V (±30 ppm/°C drift), maintains reset for ≥240ms after recovery, and operates down to VCC = 1.0V with only 7µA typical supply current. Used in portable battery-powered equipment requiring reliable power-on reset.
For engineers reviewing the APX809S00-23SR-7 datasheet, APX809S00-23SR-7 pinout, APX809S00-23SR-7 application, or APX809S00-23SR-7 equivalent, key selection criteria include reset threshold accuracy (2.25V ±0.03V), guaranteed operation at 1V VCC, push-pull output drive capability (1.2mA sink), temperature-stable timeout (240ms typ.), and SOT23-SR package compatibility.
Technical Context
The APX809S00-23SR-7 implements a precision bandgap-based voltage comparator with hysteresis-free threshold detection at 2.25V, coupled to a monostable timer that guarantees minimum 240ms reset assertion after VCC recovery. Its internal reference is trimmed during wafer sort to achieve ±1.3% initial accuracy over temperature.
It features a push-pull output stage capable of sinking 1.2mA at 0.3V (VCC = VTH − 0.2V) and sourcing 500µA while maintaining VOH ≥ 0.8×VCC - enabling direct interface to CMOS inputs without pull-up resistors. The device ignores fast transients on VCC via internal filtering and remains functional across −40°C to +125°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.25V ±0.03V - ensures reliable detection of +2.25V supply brownout with minimal false triggering |
| Reset Timeout | 240ms typ. - provides sufficient hold time for µP initialization before release |
| Supply Current | 7µA typ. - enables multi-year battery life in always-on monitoring applications |
| Operating VCC Range | 1.0V to 5.5V - supports valid reset assertion even during deep brownout or partial power-up |
| Output Type | Active-low push-pull - eliminates need for external pull-up resistor and reduces board space |
| Temp Coefficient | 30 ppm/°C - maintains threshold stability across industrial temperature range |
| VCC Transient Immunity | 20µs min. rejection - suppresses noise spikes without external RC filtering |
Pinout & Package
SOT23-SR (3-pin) surface-mount package with 2.4mm × 1.3mm footprint, 0.95mm height, and gull-wing leads. RoHS-compliant, halogen-free "Green" molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal comparator and output stage; must be low-impedance connection |
| 2 | RESET | Active-low push-pull reset output; sinks up to 1.2mA at 0.3V, no external pull-up required |
| 3 | VCC | Power supply input; powers internal circuitry and defines reset threshold reference point |
Key Features
| Feature | Design Value |
|---|---|
| Precision 2.25V threshold | Factory-trimmed to ±0.03V at 25°C with <30 ppm/°C drift - eliminates manual calibration |
| 1V minimum operating VCC | Guaranteed RESET assertion integrity down to 1.0V - supports ultra-low-voltage brownout detection |
| Push-pull active-low output | Drives CMOS inputs directly without pull-up resistor - saves PCB area and BOM cost |
| No external components | Self-contained supervision - removes need for RC timing networks or external comparators |
| 240ms reset timeout | Monostable delay ensures µP completes power stabilization and internal reset before release |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Battery-powered wearable ECG sensor continuously monitors supply voltage during intermittent BLE transmission bursts. IC Role / Device Role / Timing Role: Voltage detector asserting active-low RESET to halt MCU execution until stable 2.25V rail is confirmed post-wake. Use Value: 7µA quiescent current extends coin-cell lifetime beyond 3 years; 240ms timeout prevents premature MCU wake-up during rail settling. | Use Scenario: DIN-rail mounted I/O module powered from 3.3V DC-DC converter in harsh factory environment. IC Role / Device Role / Timing Role: Supervisory IC monitoring 3.3V rail for undervoltage events caused by transient load surges or aging power supplies. Use Value: 30 ppm/°C threshold stability ensures consistent trip point across −40°C to +85°C operating range; push-pull output drives optocoupler input directly. |
| Smart Metering Endpoints | Automotive Body Control Units |
Use Scenario: AMI smart meter with dual-supply architecture uses 2.25V LDO output for real-time clock and secure element. IC Role / Device Role / Timing Role: Dedicated supervisor for 2.25V domain, generating clean reset pulse synchronized to main system reset. Use Value: Independent 240ms timeout avoids race conditions with main µP reset; 1V operation detects pre-failure rail collapse before catastrophic dropout. | Use Scenario: BCM sub-module powered from vehicle's 3.3V domain, subject to load-dump and cold-crank transients. IC Role / Device Role / Timing Role: Resets microcontroller upon detection of 2.25V rail sag during ignition sequence or alternator ripple. Use Value: 20µs transient immunity rejects cranking noise; push-pull output ensures robust drive into noisy automotive ground plane. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV809KDBZR | 2.63V fixed threshold, 200ms timeout, 0.9µA IQ, SOT23-3 | Higher threshold; lower IQ but shorter timeout - less margin for slow-rising rails | Select if system requires tighter 2.63V detection and ultra-low power dominates timing needs |
| MAX809SEUR+T | 2.93V threshold, 240ms timeout, 12µA IQ, SOT23-3 | Higher threshold; higher supply current - less suitable for long-life battery use | Select if 2.93V rail supervision is required and legacy MAX809 footprint compatibility is critical |
Compared with TLV809KDBZR and MAX809SEUR+T, the APX809S00-23SR-7 offers optimal balance of precise 2.25V detection, industry-standard 240ms timeout, and ultra-low 7µA supply current - making it uniquely suited for battery-backed 2.25V LDO monitoring where timing margin and energy efficiency are co-critical.
Availability
APX809S00-23SR-7 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart metering endpoints, and automotive body control units requiring stable component supply and long-term lifecycle support.
Supply support for APX809S00-23SR-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 APX809S/810S series belongs to Diodes' µP supervisory product line, engineered specifically for low-cost, low-power, single-threshold voltage monitoring in space-constrained embedded systems with stringent reliability requirements.
FAQ
What is the minimum VCC required for valid RESET assertion?
The APX809S00-23SR-7 guarantees correct RESET logic state down to VCC = 1.0V. Below this voltage, output behavior is not specified. This allows detection of deep brownout conditions before complete power loss, enabling controlled shutdown sequences in battery-powered devices.
Does the device require an external capacitor for reset timing?
No. The 240ms reset timeout is generated internally using a precision monostable circuit. No external capacitor or resistor is needed - reducing BOM count, PCB area, and assembly cost while improving timing consistency across temperature and voltage.
Can APX809S00-23SR-7 drive a standard CMOS input directly?
Yes. Its push-pull output sinks 1.2mA at ≤0.3V (VCC = VTH − 0.2V) and sources 500µA while maintaining VOH ≥ 0.8×VCC, fully meeting standard 3.3V and 5V CMOS input thresholds without external pull-up components.
How does the device handle fast VCC transients?
The APX809S00-23SR-7 incorporates internal noise filtering that rejects transients shorter than 20µs. This prevents false resets caused by switching noise or load-dump spikes, eliminating need for external RC snubbers in electrically noisy environments like automotive or industrial settings.
APX809S00-23SR-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:
- 2.25V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 1ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
APX809S00-23SR-7 FAQ
1.How can I place an order for APX809S00-23SR-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX809S00-23SR-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 APX809S00-23SR-7 reliable?
The price and inventory of APX809S00-23SR-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX809S00-23SR-7 is usually 5 days.
3.What payment methods are accepted for APX809S00-23SR-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX809S00-23SR-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX809S00-23SR-7?
APX809S00-23SR-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX809S00-23SR-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 APX809S00-23SR-7?
For technical support, including APX809S00-23SR-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX809S00-23SR-7 requirements.
6.How does Aetrix verify that APX809S00-23SR-7 is sourced from the original manufacturer or authorized distributors?
All APX809S00-23SR-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 APX809S00-23SR-7 meets industry standards.
7.What is the process for return or replacement of APX809S00-23SR-7?
All APX809S00-23SR-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX809S00-23SR-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 APX809S00-23SR-7 part is unused and in its original packaging.
Return procedure for APX809S00-23SR-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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