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Diodes Incorporated APX810-44SAG-7
- Part No.:
- APX810-44SAG-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX810-44SAG-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,964
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Product details
Overview
APX810-44SAG-7 from Diodes Incorporated is a 3-pin SOT23 microprocessor supervisory IC with active-high push-pull RESET output, 4.38 V reset threshold (±0.09 V), 200 ms typical reset timeout, and guaranteed operation down to VCC = 1 V. It monitors 5 V power rails in embedded controllers and portable systems, asserting reset during brownout or power-up sequencing.
For engineers reviewing the APX810-44SAG-7 datasheet, APX810-44SAG-7 pinout, APX810-44SAG-7 application, or APX810-44SAG-7 equivalent, key selection criteria include reset threshold accuracy (±0.09 V at 4.38 V), low 30 µA supply current, push-pull drive capability (1.2 mA sink), and guaranteed reset validity over –40°C to +85°C ambient.
Technical Context
The APX810-44SAG-7 integrates a precision voltage comparator, internal timing circuit, and push-pull output driver. Its reset threshold is trimmed to 4.38 V (min 4.29 V, max 4.47 V) across –40°C to +85°C, with tempco ≤30 ppm/°C. The internal delay circuit ensures ≥140 ms (typ. 200 ms, max 280 ms) reset assertion after VCC rises above threshold.
No external components are required: the device operates standalone with only VCC, GND, and RESET connections. Reset output remains valid for VCC ≥1 V; below 1 V, the output enters high-impedance state-requiring external pull-down only in zero-voltage-critical applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.38 V (min 4.29 V, max 4.47 V); ensures reliable reset assertion before 5 V rail drops below 4.29 V |
| Reset Timeout | 200 ms typical; guarantees µP reset hold time exceeds boot initialization requirements |
| Supply Current | 30 µA typical at +25°C; enables use in battery-powered devices with multi-year standby life |
| Output Type | Push-pull active-high RESET; eliminates need for external pull-up resistor and supports direct CMOS interface |
| VCC Operating Range | 1.1 V to 5.5 V; allows valid reset assertion even during deep brownout or partial power loss |
| Reset Validity | Guaranteed down to VCC = 1 V; ensures deterministic logic state during power ramp-down |
Pinout & Package
SOT23-3 (SA package) surface-mount package with 2.4 mm × 1.3 mm footprint, 0.95 mm height, and JEDEC-standard thermal pad layout. RoHS-compliant, halogen-free "Green" molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VCC) | Power supply input | Accepts 1.1–5.5 V; powers internal comparator and timer; must be decoupled locally |
| 2 (GND) | Ground reference | Return path for all internal currents; requires low-impedance connection to system ground plane |
| 3 (RESET) | Active-high reset output | Push-pull driver asserts logic HIGH when VCC ≥ threshold; sinks 1.2 mA minimum at VOL ≤0.3 V |
Key Features
| Feature | Design Value |
|---|---|
| Precision 4.38 V threshold | ±0.09 V tolerance over temperature ensures consistent reset point across industrial range |
| 200 ms typ. reset timeout | Exceeds typical µP boot initialization windows without external timing components |
| 30 µA supply current | Reduces quiescent load on 3.3 V/5 V rails in always-on subsystems |
| Push-pull active-high output | Directly drives CMOS inputs without pull-up; compatible with modern µP reset pins requiring HIGH-active assertion |
| Valid reset down to VCC = 1 V | Prevents metastability during power collapse; avoids undefined µP state in low-VCC conditions |
Applications
| Industrial PLC Controllers | Portable Medical Monitors |
|---|---|
Use Scenario: Power monitoring in DIN-rail mounted programmable logic controllers with 5 V backplane rails. IC Role / Device Role / Timing Role: Supervisory IC asserting active-high reset to ARM Cortex-M7 MCU during AC line sags or DC-DC converter transients. Use Value: Prevents firmware corruption by holding reset until 5 V rail stabilizes ≥200 ms post-recovery, matching controller boot ROM timing requirements. |
Use Scenario: Battery-backed vital signs monitor with dual 3.3 V/5 V LDOs powering sensor front-end and display subsystem. IC Role / Device Role / Timing Role: Active-high reset supervisor ensuring clean startup of MSP432 host MCU after Li-ion voltage recovery from deep discharge. Use Value: 30 µA quiescent current extends battery life; 4.38 V threshold aligns with 5 V LDO dropout margin to avoid premature reset during load transients. |
| Smart Energy Meters | Automotive Body Control Modules |
Use Scenario: Revenue-grade electricity meter with isolated 5 V auxiliary supply derived from mains. IC Role / Device Role / Timing Role: Brownout detector triggering reset of metrology SoC (e.g., ADE7953 + ARM core) during grid voltage dips. Use Value: ±0.09 V threshold tolerance prevents nuisance resets during nominal 5 V ripple; 200 ms timeout accommodates transformer-based supply recovery latency. |
Use Scenario: 12 V-to-5 V converted power domain in BCM controlling door locks, lighting, and HVAC interfaces. IC Role / Device Role / Timing Role: Primary reset source for Infineon AURIX TC2xx microcontroller during ignition cycling and load dump events. Use Value: Guaranteed reset validity down to VCC = 1 V ensures deterministic MCU state during cranking-induced 5 V collapse; SOT23 footprint enables compact PCB layout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809SEUR+T | 4.63 V reset threshold, 140 ms min timeout, 20 µA supply current, SOT23-3 | Higher threshold better suited for 5 V systems with tighter regulation; shorter timeout may require verification against µP spec | Select if system requires higher reset margin (≥4.6 V) and lower quiescent current is critical |
| TPS3808G33DBVR | 3.08 V threshold, adjustable timeout via capacitor, 12 µA supply current, SOT23-6 | Lower threshold targets 3.3 V rails; 6-pin package adds enable and manual reset pins not present in APX810 | Choose when design needs configurable timeout or manual reset functionality alongside 3.3 V supervision |
Compared with MAX809SEUR+T and TPS3808G33DBVR, the APX810-44SAG-7 provides optimal balance of 4.38 V threshold accuracy, fixed 200 ms timeout, and minimal BOM count for 5 V µP supervision-without requiring external timing components or additional control pins.
Availability
APX810-44SAG-7 is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical monitors, smart energy meters, and automotive body control modules requiring stable component supply and long-term production continuity.
Supply support for APX810-44SAG-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 APX809/810 series is part of Diodes' supervisory IC product line, designed specifically for cost-sensitive, space-constrained microprocessor reset applications where precision threshold, low quiescent current, and SOT23 integration are essential.
FAQ
What is the minimum VCC required for APX810-44SAG-7 to assert a valid RESET signal?
The APX810-44SAG-7 guarantees correct logic-level RESET output for VCC ≥1 V. Below 1 V, the output enters high-impedance state and no longer actively drives HIGH or LOW. This behavior is intentional and documented in the datasheet's Functional Description section under "Ensuring a Valid Reset Output Down to VCC = 0".
Does APX810-44SAG-7 require an external capacitor for reset timing?
No. The APX810-44SAG-7 uses an internal precision timing circuit to generate its 200 ms typical reset timeout. No external capacitor or resistor is needed-unlike adjustable supervisors such as the TPS3808 series. This simplifies layout and improves reliability in space-constrained designs.
Can APX810-44SAG-7 be used with a 3.3 V supply rail?
No. Its 4.38 V reset threshold is optimized for 5 V systems. Using it with 3.3 V would prevent reset assertion entirely, as VCC never reaches the threshold. For 3.3 V rails, Diodes offers APX810-31SAG-7 (3.08 V threshold) or APX810-29SAG-7 (2.93 V threshold), both in identical SOT23-3 packaging.
Is APX810-44SAG-7 pin-compatible with APX809-44SAG-7?
Yes-both share identical SOT23-3 pinout (VCC, GND, RESET). However, APX809-44SAG-7 has active-low RESET output, while APX810-44SAG-7 has active-high. Swapping them requires verifying µP reset polarity compatibility and may necessitate board-level logic inversion or firmware changes.
APX810-44SAG-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:
- 4.38V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
APX810-44SAG-7 FAQ
1.How can I place an order for APX810-44SAG-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX810-44SAG-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 APX810-44SAG-7 reliable?
The price and inventory of APX810-44SAG-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX810-44SAG-7 is usually 5 days.
3.What payment methods are accepted for APX810-44SAG-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX810-44SAG-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX810-44SAG-7?
APX810-44SAG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX810-44SAG-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 APX810-44SAG-7?
For technical support, including APX810-44SAG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX810-44SAG-7 requirements.
6.How does Aetrix verify that APX810-44SAG-7 is sourced from the original manufacturer or authorized distributors?
All APX810-44SAG-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 APX810-44SAG-7 meets industry standards.
7.What is the process for return or replacement of APX810-44SAG-7?
All APX810-44SAG-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX810-44SAG-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 APX810-44SAG-7 part is unused and in its original packaging.
Return procedure for APX810-44SAG-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
APX810-44SAG-7 Tags
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MIC826SYMT-TR
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