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Diodes Incorporated APX809S-46SA-7
- Part No.:
- APX809S-46SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX809S-46SA-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:4,320
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Product details
Overview
APX809S-46SA-7 from Diodes Incorporated is a microprocessor supervisory IC that monitors +4.63V power supplies and asserts an active-low reset signal when VCC drops below threshold, maintaining reset for ≥240ms after recovery. It features 7µA typical supply current, guaranteed operation down to VCC = 1V, and push-pull output in SOT23-3 (SA) package. Used in portable battery-powered microcontroller systems requiring reliable power-on reset.
For engineers reviewing the APX809S-46SA-7 datasheet, APX809S-46SA-7 pinout, APX809S-46SA-7 application, or APX809S-46SA-7 equivalent, key selection criteria include reset threshold accuracy (4.57–4.69V), temperature coefficient (30ppm/°C), low ICC (7µA typ), guaranteed reset validity to 1V, and SOT23-3 footprint compatibility with space-constrained embedded designs.
Technical Context
The APX809S-46SA-7 integrates a precision voltage comparator with hysteresis and a fixed 240ms reset timeout timer. Its reset assertion logic is triggered only when VCC falls below 4.63V (typ), with ±0.06V tolerance over -40°C to +125°C and 30ppm/°C drift.
It uses a push-pull output stage capable of sinking 1.2mA at VOL ≤0.3V and sourcing 500µA at VOH ≥0.8×VCC, ensuring robust interface with µP reset inputs across full 1.0–5.5V operating range - including valid reset state down to VCC = 1V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V (typ), 4.57–4.69V (min/max); ensures reliable detection of +5V rail brownout before µP instability. |
| Reset Timeout | 240ms (typ), 140–280ms (min/max); guarantees sufficient hold time for full microprocessor initialization. |
| Supply Current | 7µA (typ), ≤16µA (max); enables multi-year battery life in always-on portable monitoring systems. |
| Operating Voltage | 1.0–5.5V; supports reset assertion integrity even during deep brownout or ultra-low-power wake-up sequences. |
| Output Type | Active-low push-pull; eliminates need for external pull-up resistor and reduces BOM count. |
| Temp Coefficient | 30ppm/°C; maintains <±1.5% threshold drift over full industrial temperature range (-40°C to +125°C). |
| VOL / VOH | ≤0.3V @ 1.2mA sink / ≥0.8×VCC @ 500µA source; ensures TTL/CMOS-compatible reset signaling without level-shifting. |
Pinout & Package
SOT23-3 (SA) package: 2.9mm × 1.3mm × 1.0mm body, gull-wing leads, RoHS-compliant "Green" molding compound (Br/Cl <900ppm, Sb <1000ppm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground Reference | Return path for internal comparator and output driver; must be low-impedance connection to system ground plane. |
| 2 (RESET) | Active-Low Push-Pull Output | Drives µP reset input directly; sinks current during reset, floats high when released - no external pull-up required. |
| 3 (VCC) | Supply Input | Monitored voltage rail input; also powers internal circuitry; valid down to 1.0V for fail-safe reset assertion. |
Key Features
| Feature | Design Value |
|---|---|
| Precision 4.63V threshold | Guaranteed 4.57–4.69V window over -40°C to +125°C enables accurate +5V rail supervision without calibration. |
| 240ms reset timeout | Fixed delay ensures µP completes power stabilization and internal register initialization before release. |
| 7µA supply current | Enables integration into energy-harvesting or coin-cell-powered devices with >5-year shelf life. |
| Reset valid to 1V | Prevents spurious release during deep undervoltage events - critical for battery-fail-safe operation. |
| No external components | Eliminates discrete resistors, capacitors, or diodes traditionally needed for reset generation circuits. |
Applications
| Battery-Powered IoT Sensor Node | Industrial PLC Controller |
|---|---|
Use Scenario: A wireless environmental sensor operates on a CR2032 coin cell and wakes every 10 minutes to sample and transmit data. IC Role / Device Role / Timing Role: Supervisory IC asserting active-low reset to MSP430F5xx during power-up and brownout, ensuring deterministic boot sequence. Use Value: 7µA quiescent current extends battery life beyond 7 years; 240ms reset pulse prevents firmware lockup during weak-cell voltage sag. | Use Scenario: Modular I/O rack in factory automation requires guaranteed reset on 5V backplane supply fluctuations. IC Role / Device Role / Timing Role: Power monitor generating clean, glitch-immune reset signal to ARM Cortex-M7-based controller during line transients. Use Value: 30ppm/°C threshold stability maintains reset accuracy across -25°C to +70°C cabinet temperatures; push-pull output drives long PCB traces without signal degradation. |
| Medical Handheld Diagnostic Device | Automotive Body Control Module (BCM) |
Use Scenario: Portable ultrasound probe powered by Li-ion battery with dynamic load switching between analog front-end and Bluetooth radio. IC Role / Device Role / Timing Role: Reset supervisor validating 4.63V LDO output before enabling FPGA configuration and ADC biasing. Use Value: Valid reset assertion down to VCC = 1V prevents partial initialization during rapid battery discharge; SOT23-3 footprint saves space in compact enclosure. | Use Scenario: BCM microcontroller (Infineon TC375) requires robust reset during cold-crank (battery dip to 6V) and load-dump (transient spikes). IC Role / Device Role / Timing Role: Primary voltage detector for 5V domain, interfacing directly with µC's nRST pin via short trace. Use Value: Immunity to fast VCC transients ensures no false resets during alternator switching; RoHS/Green compliance meets automotive material requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809SEUR+T | 4.63V threshold, 140ms reset timeout, 10µA ICC, SOT23-3 | Lacks guaranteed reset validity below 1.2V; less suitable for deep-brownout battery systems | Prefer APX809S-46SA-7 where sub-1.2V reset integrity is required. |
| TPS3808G33DBVR | 3.3V threshold (not 4.63V), adjustable timeout, 1.1µA ICC, SOT23-6 | Different threshold and 6-pin package; requires external timing capacitor for timeout setting | Select only if system uses 3.3V supply and programmable delay is needed; not drop-in compatible. |
Compared with MAX809SEUR+T and TPS3808G33DBVR, the APX809S-46SA-7 uniquely combines 4.63V precision threshold, 240ms fixed timeout, 7µA ultra-low ICC, and guaranteed 1V operation - making it optimal for space-constrained +5V battery-powered systems demanding fail-safe reset behavior.
Availability
APX809S-46SA-7 is available at Aetrix Electronics and suitable for battery-powered IoT nodes, industrial PLC controllers, medical handheld diagnostics, and automotive BCMs requiring stable component supply with full lifecycle support.
Supply support for APX809S-46SA-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, low-power, and green-packaged components for industrial, computing, and consumer markets.
The APX809S/810S series targets cost-sensitive, space-constrained microprocessor supervision - delivering precision voltage monitoring, fixed reset timing, and ultra-low power in minimal SOT23-3 footprint for portable and embedded systems.
FAQ
What is the exact reset threshold voltage for APX809S-46SA-7?
The APX809S-46SA-7 has a nominal reset threshold of 4.63V, with guaranteed minimum of 4.57V and maximum of 4.69V across -40°C to +125°C ambient temperature. This is confirmed in the Electrical Characteristics table of DS39140 Rev. 2–2, specifying the -46 variant under the APX809SXX-46 column.
Does APX809S-46SA-7 require an external pull-up resistor on the RESET pin?
No. The APX809S-46SA-7 features a push-pull output stage that actively drives LOW during reset and HIGH when released, eliminating the need for an external pull-up resistor. This is explicitly stated in the Description section and verified in the Pin Descriptions and Electrical Characteristics (VOH/VOL) tables of DS39140.
Can APX809S-46SA-7 operate reliably at VCC = 1.2V?
Yes. The device guarantees correct reset logic state down to VCC = 1.0V, as specified in both the Recommended Operating Conditions (VCC min = 1.0V) and Electrical Characteristics (reset valid to 1V). At 1.2V, it fully satisfies all functional and timing specifications including 240ms timeout and 7µA supply current.
Is the SOT23-3 (SA) package of APX809S-46SA-7 lead-free and halogen-free?
Yes. The SA package uses Diodes Incorporated's "Green" molding compound: fully RoHS-compliant (2015/863/EU), lead-free, and halogen/antimony-free (<900ppm Br, <900ppm Cl, <1000ppm Sb), as documented in Notes 1–3 of DS39140 Rev. 2–2 and the Package Outline section.
APX809S-46SA-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:
- 4.63V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
APX809S-46SA-7 FAQ
1.How can I place an order for APX809S-46SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX809S-46SA-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 APX809S-46SA-7 reliable?
The price and inventory of APX809S-46SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX809S-46SA-7 is usually 5 days.
3.What payment methods are accepted for APX809S-46SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX809S-46SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX809S-46SA-7?
APX809S-46SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX809S-46SA-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 APX809S-46SA-7?
For technical support, including APX809S-46SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX809S-46SA-7 requirements.
6.How does Aetrix verify that APX809S-46SA-7 is sourced from the original manufacturer or authorized distributors?
All APX809S-46SA-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 APX809S-46SA-7 meets industry standards.
7.What is the process for return or replacement of APX809S-46SA-7?
All APX809S-46SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX809S-46SA-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 APX809S-46SA-7 part is unused and in its original packaging.
Return procedure for APX809S-46SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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