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Diodes Incorporated APX809S00-26SA-7
- Part No.:
- APX809S00-26SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX809S00-26SA-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,550
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Product details
Overview
APX809S00-26SA-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory functions in digital systems powered by +2.5V to +5V rails. It provides active-low push-pull reset assertion when VCC drops below 2.63V (typical threshold), maintains reset for ≥240ms after VCC recovery, and operates reliably down to VCC = 1.0V - enabling robust power monitoring in battery-powered controllers and embedded instrumentation.
For engineers reviewing the APX809S00-26SA-7 datasheet, APX809S00-26SA-7 pinout, APX809S00-26SA-7 application, or APX809S00-26SA-7 equivalent, key selection criteria include reset threshold accuracy (±0.04V), 7µA typical supply current, guaranteed operation at 1V VCC, and SOT23-3 SA package compatibility with space-constrained PCB layouts.
Technical Context
The device implements a precision bandgap-based voltage comparator with internal hysteresis and temperature-compensated reference (30 ppm/°C max drift). Its reset timing circuit uses an internal RC network to generate a fixed 240ms minimum timeout after VCC exceeds the threshold - independent of external components.
Logic behavior is strictly defined: RESET output remains low until VCC rises ≥1.02×VTH and sustains low state for ≥240ms post-threshold crossing; output is guaranteed valid down to 1.0V VCC, and fast transient immunity prevents false triggering on sub-20µs supply dips.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.63V (typical); precise detection for +2.5V–+3.3V system rails |
| Reset Timeout | 240ms (min); ensures µP completes full power-up initialization before release |
| Supply Current | 7µA (typ); enables multi-year operation in coin-cell–powered devices |
| VCC Operating Range | 1.0V to 5.5V; guarantees functional reset assertion even during brownout |
| Output Type | Active-low push-pull; eliminates need for external pull-up resistor |
| Temp. Coefficient | 30 ppm/°C (max); maintains threshold stability across –40°C to +125°C |
| Reset Response Delay | 20µs (max); detects rapid VCC dips without missing critical faults |
Pinout & Package
APX809S00-26SA-7 is housed in a RoHS-compliant, halogen-free SOT23-3 (SA) package with 1.3mm × 2.4mm footprint and 0.95mm height - optimized for high-density portable PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal comparator and output stage |
| 2 | RESET | Active-low push-pull output; sinks ≥1.2mA at 0.3V max VOL |
| 3 | VCC | Power supply input; also serves as monitored rail for threshold comparison |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Integrated reference, comparator, and timing circuit eliminate discrete R/C networks and reduce BOM count |
| Guaranteed reset validity to 1V | Enables reliable brownout detection in Li-ion or supercapacitor backup systems where VCC decays slowly |
| Push-pull active-low output | Drives µP RESET# directly without pull-up resistor - saves board area and reduces leakage paths |
| 240ms minimum reset pulse width | Meets JEDEC JESD8-12B requirements for microprocessor power-on reset timing |
| SOT23-3 "Green" packaging | Lead-free, Br/Sb-free molding compound compliant with RoHS 3 and Diodes' halogen-free definition |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Battery-powered glucose monitors and ECG patches requiring fail-safe startup after cold boot or battery insertion. IC Role / Device Role / Timing Role: Voltage detector asserting µP reset until regulated 3.3V rail stabilizes and remains asserted ≥240ms. Use Value: Prevents firmware execution on marginal supply; 7µA quiescent current extends single-CR2032 life beyond 5 years. |
Use Scenario: DIN-rail mounted programmable logic controller modules operating in wide-temperature industrial environments. IC Role / Device Role / Timing Role: Supervisory circuit monitoring 24V-to-3.3V DC-DC output, asserting reset during line transients or undervoltage events. Use Value: 30 ppm/°C threshold stability ensures consistent trip point from –40°C to +85°C ambient; 1V operation supports hold-up during brief AC mains dips. |
| Smart Energy Meters | Automotive Body Control Units |
Use Scenario: ANSI C12.20-compliant electricity meters with dual-supply (battery + mains) and tamper-detection logic. IC Role / Device Role / Timing Role: Monitors 3.0V LDO output feeding metrology SoC; generates clean reset pulse upon battery switchover. Use Value: 2.63V threshold matches 3.0V rail tolerance; 240ms timeout satisfies ANSI requirement for secure boot sequence duration. |
Use Scenario: 12V automotive body control modules (BCM) with 5V/3.3V secondary rails powering CAN transceivers and microcontrollers. IC Role / Device Role / Timing Role: Detects 5V rail collapse during load-dump or cranking events; asserts reset to prevent CAN bus arbitration errors. Use Value: Immunity to <20µs transients avoids spurious resets during alternator switching; push-pull output drives heavy capacitive loads on µP RESET# net. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD1T1G | 2.93V threshold (fixed), 140ms min reset timeout, 1.2µA ICC | Higher threshold unsuitable for 2.5V/2.8V rails; shorter timeout may not meet µP spec | Select only if system uses ≥3.0V supply and requires ultra-low ICC |
| TPS3808G01DBVR | Adjustable threshold (via external resistor), 200ms typ timeout, 1.1µA ICC | Requires external resistor network; longer design cycle and BOM overhead vs. factory-trimmed APX809S | Prefer when flexible threshold tuning is mandatory and space permits extra passives |
Compared with MAX809TRD1T1G and TPS3808G01DBVR, APX809S00-26SA-7 delivers tighter threshold accuracy (±0.04V), guaranteed 240ms minimum timeout, and zero external components - making it optimal for cost-sensitive, space-constrained 2.5V–3.3V embedded systems where design simplicity and production consistency are prioritized.
Availability
APX809S00-26SA-7 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart energy meters, and automotive body control units requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for APX809S00-26SA-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.
APX809S/810S belongs to Diodes' µP supervisory product line - engineered specifically for low-cost, zero-component power monitoring in battery-powered and harsh-environment embedded systems.
FAQ
What is the exact reset threshold voltage for APX809S00-26SA-7?
The APX809S00-26SA-7 has a factory-trimmed reset threshold of 2.63V (typical), with guaranteed range 2.59V to 2.67V at +25°C. This value is laser-trimmed during production and remains stable within ±0.04V over –40°C to +125°C due to 30 ppm/°C temperature coefficient.
Does APX809S00-26SA-7 require an external pull-up resistor on the RESET pin?
No. The device features a push-pull output stage that actively drives RESET low during fault conditions and high (to VCC) during normal operation - eliminating the need for an external pull-up resistor and reducing PCB area and leakage risk.
Can APX809S00-26SA-7 operate with a 1.8V supply rail?
No. While the device guarantees functional reset assertion down to VCC = 1.0V, its specified reset threshold is 2.63V - meaning it will assert reset continuously when VCC < 2.59V. For 1.8V systems, use APX809SXX-23SA-7 (2.25V threshold) instead.
How does the 240ms reset timeout behave during temperature variation?
The 240ms minimum timeout is maintained across –40°C to +125°C ambient per datasheet specification. Characterization data shows timeout remains ≥240ms at all temperatures, with typical values ranging from 240ms to 280ms - ensuring µP reset compliance under worst-case thermal conditions.
APX809S00-26SA-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:
- 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
APX809S00-26SA-7 FAQ
1.How can I place an order for APX809S00-26SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX809S00-26SA-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 APX809S00-26SA-7 reliable?
The price and inventory of APX809S00-26SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX809S00-26SA-7 is usually 5 days.
3.What payment methods are accepted for APX809S00-26SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX809S00-26SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX809S00-26SA-7?
APX809S00-26SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX809S00-26SA-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 APX809S00-26SA-7?
For technical support, including APX809S00-26SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX809S00-26SA-7 requirements.
6.How does Aetrix verify that APX809S00-26SA-7 is sourced from the original manufacturer or authorized distributors?
All APX809S00-26SA-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 APX809S00-26SA-7 meets industry standards.
7.What is the process for return or replacement of APX809S00-26SA-7?
All APX809S00-26SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX809S00-26SA-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 APX809S00-26SA-7 part is unused and in its original packaging.
Return procedure for APX809S00-26SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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