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Diodes Incorporated APX809-46SRG-7
- Part No.:
- APX809-46SRG-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX809-46SRG-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23R
- Quantity:
- Payment:
- Shipping:
Inventory:2,990
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Product details
Overview
APX809-46SRG-7 from Diodes Incorporated is a 3-pin microprocessor reset supervisor IC with active-low push-pull RESET output, 4.63 V reset threshold (±1.5% over -40°C to +85°C), 200 ms typical reset timeout, 30 µA supply current, and guaranteed operation down to VCC = 1 V. It monitors 5 V power rails in embedded controllers and portable systems to prevent erroneous microprocessor startup during brownout.
For engineers reviewing the APX809-46SRG-7 datasheet, APX809-46SRG-7 pinout, APX809-46SRG-7 application, or APX809-46SRG-7 equivalent, key selection criteria include reset threshold accuracy, push-pull drive capability, low-VCC reset validity, SOT23 footprint compatibility, and RoHS-compliant green packaging.
Technical Context
The APX809-46SRG-7 integrates a precision voltage comparator with hysteresis, an internal timing circuit for fixed reset assertion duration, and a push-pull output stage. Its reset threshold is trimmed to 4.63 V with ±1.5% tolerance across temperature, and it guarantees valid logic states for VCC ≥ 1 V.
It ignores fast transients on VCC via internal filtering and asserts RESET low when VCC drops below the threshold, holding it low for ≥240 ms after VCC recovers - with typical timeout of 200 ms at +25°C and monotonic variation from 140 ms to 280 ms across -40°C to +105°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63 V (min 4.54 V, max 4.72 V at -40°C to +85°C) - ensures reliable reset initiation before 5 V rail collapse. |
| Reset Timeout | 200 ms typ (140–280 ms range) - provides sufficient hold time for µP initialization and peripheral stabilization. |
| Supply Current | 30 µA typ at +25°C - enables battery longevity in portable equipment without external biasing. |
| VCC Validity Range | 1.0 V to 5.5 V - guarantees RESET remains valid down to 1 V, critical for graceful shutdown sequencing. |
| Output Type | Push-pull active-low - eliminates need for external pull-up resistor and supports direct CMOS/TTL interface. |
| ESD Rating | 5 kV HBM - enhances robustness against handling-induced transients in manufacturing and field environments. |
Pinout & Package
SOT23-3 (SR package): ultra-compact surface-mount package with 2.4 mm × 1.3 mm footprint, 0.95 mm height, and thermal resistance θJA = 201°C/W on FR-4 board with 2 oz copper.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Supply Input | Power rail input (1.1–5.5 V); powers internal comparator and timer; must be decoupled near pin. |
| GND | Ground Reference | Return path for all internal currents; requires low-impedance connection to system ground plane. |
| RESET | Active-Low Reset Output | Push-pull output asserted low during reset; drives µP /RESET pin directly without pull-up. |
Key Features
| Feature | Design Value |
|---|---|
| Precision 4.63 V threshold | ±1.5% tolerance over full industrial temperature range ensures deterministic reset point for 5 V systems. |
| Guaranteed reset validity to 1 V | Enables controlled reset assertion even during deep brownout, avoiding undefined µP state. |
| No external components required | Reduces BOM count, PCB area, and qualification effort versus discrete reset solutions. |
| Green SOT23 package | Halogen- and antimony-free, lead-free, RoHS-compliant molding compound (<900 ppm Br/Cl, <1000 ppm Sb). |
Applications
| Industrial Controllers | Portable Medical Devices |
|---|---|
Use Scenario: PLC I/O modules operating in factory environments with fluctuating 5 V supplies. IC Role / Device Role / Timing Role: Monitors 5 V VCC and asserts /RESET to halt firmware execution during undervoltage events. Use Value: Prevents spurious relay actuation or sensor misreads by ensuring µC only runs when supply meets 4.63 V minimum. | Use Scenario: Battery-powered glucose meters with Li-ion supply and low-power µC. IC Role / Device Role / Timing Role: Provides clean power-on reset and brownout protection during battery discharge. Use Value: 30 µA quiescent current extends battery life; 1 V VCC validity allows reset assertion until battery reaches end-of-life. |
| Network Edge Routers | Smart Energy Meters |
Use Scenario: Fanless residential gateways with unregulated 5 V DC input subject to line sags. IC Role / Device Role / Timing Role: Supervises primary 5 V rail and triggers system-wide reset on sustained dip below 4.63 V. Use Value: 200 ms reset pulse ensures Ethernet PHY and flash memory complete safe shutdown before restart. | Use Scenario: DIN-rail mounted electricity meters exposed to grid instability and temperature extremes. IC Role / Device Role / Timing Role: Resets metering SoC during AC line interruptions or transformer tap changes. Use Value: ±1.5% threshold stability over -40°C to +85°C prevents false resets in outdoor enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD2T | 4.63 V threshold, 240 ms min timeout, open-drain output requiring external pull-up | Lacks push-pull drive; adds component count and reduces noise immunity on long traces | Select if legacy design uses open-drain topology or requires MAXIM footprint compatibility |
| TPS3808G33DBVR | 3.3 V threshold, adjustable timeout via capacitor, 1.5 µA quiescent current | Not voltage-compatible for 5 V monitoring; requires external timing capacitor and layout revision | Select only for new 3.3 V designs prioritizing ultra-low current over fixed-threshold simplicity |
Compared with MAX809TRD2T and TPS3808G33DBVR, the APX809-46SRG-7 delivers plug-and-play 5 V supervision with push-pull drive, eliminating external components while maintaining industrial-grade accuracy and temperature stability - ideal for cost-sensitive, space-constrained 5 V µP systems.
Availability
APX809-46SRG-7 is available at Aetrix Electronics and suitable for industrial controllers, portable medical devices, and network edge equipment requiring stable component supply, long-term lifecycle support, and RoHS-compliant green packaging.
Supply support for APX809-46SRG-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 series belongs to Diodes' microprocessor supervisory product line, designed specifically for cost-effective, single-function reset monitoring in space-constrained 5 V, 3.3 V, and 3 V digital systems with minimal external components.
FAQ
What is the exact reset threshold voltage and its tolerance for APX809-46SRG-7?
The APX809-46SRG-7 has a nominal reset threshold of 4.63 V, with a guaranteed range of 4.54 V to 4.72 V over the full operating temperature range of -40°C to +85°C. This ±1.5% tolerance ensures consistent brownout detection across environmental conditions without calibration.
Does APX809-46SRG-7 require an external pull-up resistor on the RESET pin?
No. The APX809-46SRG-7 features a push-pull output stage, so the RESET pin actively drives both high and low states. Unlike open-drain supervisors, it does not require an external pull-up resistor, reducing component count and improving noise immunity on PCB traces.
Can APX809-46SRG-7 operate reliably below 1.0 V VCC?
No. The device guarantees correct RESET logic state only for VCC ≥ 1.0 V. Below 1.0 V, the RESET output becomes high-impedance and may float. For applications requiring valid reset down to 0 V, a 100 kΩ pull-down resistor on RESET is recommended per the datasheet.
Is APX809-46SRG-7 compatible with lead-free reflow soldering processes?
Yes. APX809-46SRG-7 uses a fully lead-free, RoHS-compliant "Green" SOT23 package with no intentionally added lead, bromine, chlorine, or antimony. It meets JEDEC J-STD-020 moisture sensitivity level 1 and supports standard Pb-free reflow profiles up to 260°C peak temperature.
APX809-46SRG-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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT23R
APX809-46SRG-7 FAQ
1.How can I place an order for APX809-46SRG-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX809-46SRG-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 APX809-46SRG-7 reliable?
The price and inventory of APX809-46SRG-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX809-46SRG-7 is usually 5 days.
3.What payment methods are accepted for APX809-46SRG-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX809-46SRG-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX809-46SRG-7?
APX809-46SRG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX809-46SRG-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 APX809-46SRG-7?
For technical support, including APX809-46SRG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX809-46SRG-7 requirements.
6.How does Aetrix verify that APX809-46SRG-7 is sourced from the original manufacturer or authorized distributors?
All APX809-46SRG-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 APX809-46SRG-7 meets industry standards.
7.What is the process for return or replacement of APX809-46SRG-7?
All APX809-46SRG-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX809-46SRG-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 APX809-46SRG-7 part is unused and in its original packaging.
Return procedure for APX809-46SRG-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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