My Inquiry
My Account
Diodes Incorporated APX809-26SRG-7
- Part No.:
- APX809-26SRG-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX809-26SRG-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23R
- Quantity:
- Payment:
- Shipping:
Inventory:923
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
APX809-26SRG-7 from Diodes Incorporated is a 3-pin SOT23 microprocessor supervisory IC with active-low push-pull RESET output, precision 2.63V reset threshold (±0.04V over -40°C to +85°C), 200ms typical reset timeout, 30µA supply current, and guaranteed reset validity down to VCC = 1V. It monitors 3.0V/3.3V digital power rails in embedded controllers and portable equipment.
For engineers reviewing the APX809-26SRG-7 datasheet, APX809-26SRG-7 pinout, APX809-26SRG-7 application, or APX809-26SRG-7 equivalent, key selection criteria include reset threshold accuracy, push-pull drive capability, low quiescent current, brownout immunity, and SOT23 footprint compatibility for space-constrained µP reset circuits.
Technical Context
The APX809-26SRG-7 integrates a precision voltage comparator with internal reference, delay timer, and push-pull output driver. Its reset assertion is triggered when VCC falls below 2.63V and held for ≥240ms after VCC rises above threshold.
Designed for single-supply monitoring, it operates from 1.1V to 5.5V, ignores fast VCC transients, and maintains valid logic state across full industrial temperature range (-40°C to +85°C) without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.63V ±0.04V at -40°C to +85°C - ensures reliable reset activation before 3.0V/3.3V supply collapse |
| Reset Timeout | 200ms typical (140–280ms min–max) - guarantees sufficient µP initialization time after power recovery |
| Supply Current | 30µA typical at +25°C - enables battery longevity in portable systems |
| Output Type | Push-pull active-low RESET - eliminates need for external pull-up resistor and supports direct µP reset input |
| VCC Validity Range | Reset asserted correctly down to VCC = 1V - provides deterministic behavior during deep brownout |
| ESD Protection | 5kV HBM - enhances robustness in handling and board assembly |
| Operating Temp | -40°C to +85°C ambient - meets industrial-grade environmental requirements |
Pinout & Package
SOT23-3 (SR package) surface-mount package with 2.4mm × 1.3mm footprint, 0.95mm height, and thermal resistance θJA = 201°C/W on FR-4 PCB with 2oz copper.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VCC) | Power supply input | Accepts 1.1V–5.5V; powers internal comparator and timer; must be decoupled locally |
| 2 (GND) | Ground reference | Return path for all internal circuitry; requires low-impedance connection to system ground plane |
| 3 (RESET) | Active-low push-pull reset output | Drives µP reset pin directly; sinks ≥1.2mA at 0.3V; no external pull-up needed |
Key Features
| Feature | Design Value |
|---|---|
| Precision reset threshold | 2.63V ±0.04V over full temperature range - eliminates margin uncertainty in 3.0V/3.3V systems |
| No external components required | Self-contained supervision - reduces BOM count, PCB area, and qualification effort |
| Guaranteed reset validity to VCC = 1V | Ensures deterministic reset state during severe brownout - prevents µP lockup or undefined execution |
| Push-pull active-low output | Direct interface to standard µP reset inputs - avoids weak pull-up limitations and timing skew |
| Green RoHS-compliant packaging | SOT23 with halogen- and antimony-free molding compound (<900ppm Br/Cl, <1000ppm Sb) - satisfies modern environmental compliance |
Applications
| Industrial Controllers | Portable Medical Devices |
|---|---|
|
Use Scenario: PLC I/O modules powered by 3.3V DC-DC converters subject to load transients and thermal cycling. IC Role / Device Role / Timing Role: Monitors 3.3V rail and asserts active-low RESET to ARM Cortex-M4 microcontroller during undervoltage events. Use Value: Prevents firmware corruption by ensuring clean restart after 200ms minimum reset pulse, even with 100µs VCC rise times. |
Use Scenario: Battery-powered glucose meter with Li-ion supply and LDO-regulated 3.0V logic rail. IC Role / Device Role / Timing Role: Supervises 3.0V rail and triggers reset if battery voltage drops below 3.0V × 0.875 = 2.63V threshold. Use Value: Extends usable battery life by enabling operation down to 2.63V while guaranteeing safe µC reboot before data loss. |
| Network Edge Routers | Smart Energy Meters |
|
Use Scenario: Fanless edge router with 5V-to-3.3V conversion and transient-sensitive packet processing ASIC. IC Role / Device Role / Timing Role: Provides brownout detection and 200ms reset hold-off to prevent partial register writes during power sag. Use Value: Eliminates need for external RC network, reducing layout sensitivity to noise and improving long-term reliability. |
Use Scenario: DIN-rail mounted electricity meter with isolated 3.3V MCU supply and EMI-prone AC line coupling. IC Role / Device Role / Timing Role: Detects 3.3V rail collapse due to surge-induced LDO dropout and holds reset until stable recovery. Use Value: Push-pull output drives reset pin without pull-up leakage, critical for >10-year field deployment under wide temperature swings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD3T | 2.63V threshold, 240ms min timeout, open-drain output requiring external pull-up | Lacks push-pull drive; adds component count and timing uncertainty in high-noise environments | Choose only if legacy MAXIM footprint compatibility is required and pull-up resistor placement is feasible |
| TPS3808G12DBVR | 2.63V threshold, 200ms typical timeout, but 1.8V–6.0V VCC range and higher 12µA ICC | Wider supply range enables dual-rail monitoring; lower current benefits ultra-low-power designs | Select when monitoring 1.8V logic rails or extending battery life beyond APX809's 30µA baseline |
Compared with MAX809TRD3T and TPS3808G12DBVR, the APX809-26SRG-7 delivers identical threshold accuracy and timing while offering integrated push-pull drive-reducing design complexity and improving noise immunity without sacrificing industrial temperature support or green compliance.
Availability
APX809-26SRG-7 is available at Aetrix Electronics and suitable for industrial controllers, portable medical devices, and smart energy meters requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.
Supply support for APX809-26SRG-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, engineered specifically for cost-sensitive, space-constrained applications requiring precision reset control without external passive components.
FAQ
What is the exact reset threshold voltage and tolerance for APX809-26SRG-7?
The APX809-26SRG-7 has a nominal reset threshold of 2.63V, with a guaranteed range of 2.59V to 2.69V across -40°C to +85°C ambient temperature. This specification is confirmed in the Electrical Characteristics table of DS31322 Rev. 5–3, and applies under standard test conditions with VCC rising at ≤100µs.
Does APX809-26SRG-7 require an external pull-up resistor on the RESET pin?
No. The APX809-26SRG-7 features a push-pull output stage that actively drives RESET low and high, eliminating the need for an external pull-up resistor. This is explicitly stated in the device description and functional block diagram of DS31322, and verified by its VOL/VOH specifications under load.
Can APX809-26SRG-7 operate reliably below 1.1V VCC?
No. The recommended operating VCC range is 1.1V to 5.5V per the datasheet's Recommended Operating Conditions table. While the RESET output remains valid down to VCC = 1V, operation below 1.1V is outside specification and not characterized for timing, threshold accuracy, or reliability.
Is APX809-26SRG-7 pin-compatible with APX809-26SAG-7?
Yes. Both APX809-26SRG-7 and APX809-26SAG-7 use the same SOT23 package outline and identical pin assignments (VCC, GND, RESET). The "SR" and "SA" suffixes denote different mold compound variants within the same mechanical footprint, with no electrical or pinout differences.
APX809-26SRG-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:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT23R
APX809-26SRG-7 FAQ
1.How can I place an order for APX809-26SRG-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX809-26SRG-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 APX809-26SRG-7 reliable?
The price and inventory of APX809-26SRG-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX809-26SRG-7 is usually 5 days.
3.What payment methods are accepted for APX809-26SRG-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX809-26SRG-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX809-26SRG-7?
APX809-26SRG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX809-26SRG-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 APX809-26SRG-7?
For technical support, including APX809-26SRG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX809-26SRG-7 requirements.
6.How does Aetrix verify that APX809-26SRG-7 is sourced from the original manufacturer or authorized distributors?
All APX809-26SRG-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 APX809-26SRG-7 meets industry standards.
7.What is the process for return or replacement of APX809-26SRG-7?
All APX809-26SRG-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX809-26SRG-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 APX809-26SRG-7 part is unused and in its original packaging.
Return procedure for APX809-26SRG-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
APX809-26SRG-7 Tags
-
MIC826SYMT-TR
Microchip Technology
-
APX803S-31SA-7
Diodes Incorporated
-
APX803L20-29SA-7
Diodes Incorporated
-
TPS3828-33DBVR
Texas Instruments
-
V6340RSP3B+
EM Microelectronic
-
EM6325CXSP5B-2.9+
EM Microelectronic
-
MCP120T-300I/TT
Microchip Technology
-
MCP130T-315I/TT
Microchip Technology
-
MCP120T-475I/TT
Microchip Technology
-
MCP111T-300E/TT
Microchip Technology
-
MCP120T-315I/TT
Microchip Technology
-
MCP809T-315I/TT
Microchip Technology
Tech Hub
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
