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Diodes Incorporated AZ809ANRTR-E1
- Part No.:
- AZ809ANRTR-E1
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AZ809ANRTR-E1.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:3,363
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Product details
Overview
AZ809ANRTR-E1 from BCD Semiconductor Manufacturing Limited is a precision 3-pin microprocessor reset circuit with active-low push-pull output, designed to monitor 3.0V supply rails in embedded systems. It asserts RESET when VCC falls below 2.63V (typical), holds reset for 240ms after recovery, and operates down to VCC = 1.0V - enabling reliable power-up sequencing in battery-powered microcontroller applications.
For engineers reviewing the AZ809ANRTR-E1 datasheet, AZ809ANRTR-E1 pinout, AZ809ANRTR-E1 application, or AZ809ANRTR-E1 equivalent, key selection criteria include reset threshold accuracy (±30 ppm/°C tempco), transient immunity (20µs glitch rejection at 100mV overdrive), guaranteed reset validity at low VCC, and SOT-23 footprint compatibility with space-constrained PCB layouts.
Technical Context
The AZ809ANRTR-E1 integrates a precision voltage reference, comparator, timer oscillator, and push-pull output stage in a single monolithic IC. Its reset logic triggers on VCC falling below a fixed 2.63V threshold (R-version), with hysteresis minimized to ensure clean release at threshold crossing.
Reset timeout is generated by an internal RC-based timer with 240ms typical duration (140ms min, 560ms max over temperature), independent of external components. The device rejects fast negative-going VCC transients up to 20µs at 100mV undershoot due to optimized comparator response and internal filtering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.63V (typical) - precisely monitors 3.0V systems with ±70mV tolerance over -40°C to +105°C |
| Reset Timeout | 240ms (typical) - ensures sufficient processor initialization time before release |
| Supply Current | 6µA (typical at 3.3V, 25°C) - enables ultra-low-power operation in battery-backed systems |
| Operating Voltage Range | 1.0V to 5.5V - guarantees valid RESET output even during brownout down to 1.0V VCC |
| Output Type | Push-pull active-low - eliminates need for external pull-up resistor and reduces BOM count |
| Transient Immunity | Rejects 20µs, 100mV VCC undershoot - prevents false resets from noise or switching glitches |
| Temp Range | -40°C to +105°C - qualified for automotive and industrial ambient environments |
Pinout & Package
Package: SOT-23 (3-pin, surface-mount, 2.3mm × 2.5mm footprint).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal comparator and output stage; must be low-impedance connection to system ground plane |
| 2 | RESET | Active-low push-pull output; sinks ≥1.2mA at VCC ≥ VTH(min); remains valid down to VCC = 1.0V |
| 3 | VCC | Power input for monitoring; accepts 1.0–5.5V; internal circuitry functional even below 2.63V |
Key Features
| Feature | Design Value |
|---|---|
| Precision 2.63V threshold | Fixed reset point optimized for 3.0V logic families with ±3% initial accuracy and 30 ppm/°C tempco |
| No external components required | Integrated timer and push-pull driver eliminate pull-up resistors, capacitors, or timing networks |
| Valid reset down to 1.0V VCC | Ensures deterministic processor reset state during deep brownout or battery depletion |
| Fast transient immunity | Rejects sub-20µs VCC glitches without false triggering - critical for noisy DC-DC converter outputs |
| Full-temperature operation | Guaranteed functionality across -40°C to +105°C ambient - suitable for under-hood and industrial enclosures |
Applications
| Microprocessor Power Sequencing | Battery-Powered IoT Sensors |
|---|---|
Use Scenario: Ensuring safe boot of ARM Cortex-M0+ MCU after Li-ion battery voltage recovers from deep discharge. IC Role / Device Role / Timing Role: System supervisor that holds RESET until VCC stabilizes above 2.63V and sustains 240ms timeout for flash initialization. Use Value: Prevents corrupted firmware execution by guaranteeing minimum reset assertion time independent of supply ramp rate. |
Use Scenario: Maintaining deterministic wake-up behavior in BLE beacon modules powered by coin-cell batteries. IC Role / Device Role / Timing Role: Low-current (6µA) reset generator that remains functional down to 1.0V VCC during battery sag. Use Value: Eliminates need for external reset supervisor IC or discrete RC network, reducing size and leakage path count. |
| Automotive Body Control Module | Industrial PLC I/O Subsystem |
Use Scenario: Monitoring 3.3V rail derived from automotive 12V supply in door module ECUs exposed to load-dump transients. IC Role / Device Role / Timing Role: Reset circuit immune to 20µs, 100mV VCC dips caused by relay switching or alternator ripple. Use Value: Avoids spurious resets during engine cranking or accessory load switching - improves ASIL-B functional safety compliance. |
Use Scenario: Supervising isolated 3.0V digital supply in DIN-rail mounted programmable logic controller I/O card. IC Role / Device Role / Timing Role: Precision reset source with -40°C to +105°C qualification and 240ms timeout for FPGA configuration lock. Use Value: Enables reliable field-replaceable unit (FRU) hot-swap without risk of partial configuration or metastability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD1T1G | 2.93V threshold, 140ms min timeout, 1.2µA quiescent current | Optimized for 3.3V systems; lower IQ but narrower VCC operating range (1.2–5.5V) | Select when lowest possible supply current is critical and 3.3V rail stability is prioritized over 3.0V compatibility |
| TPS3808G12DBVR | 1.2V adjustable threshold via external resistor divider, 200ms timeout, 1.1µA IQ | Requires external components; supports custom thresholds but increases layout complexity and BOM count | Choose when system requires non-standard reset voltage or multi-rail supervision with shared timing |
Compared with MAX809TRD1T1G and TPS3808G12DBVR, the AZ809ANRTR-E1 offers tighter 2.63V threshold matching for 3.0V logic, guaranteed reset validity at 1.0V VCC, and zero external component requirement - making it optimal for cost-sensitive, space-constrained 3.0V embedded designs where deterministic low-voltage behavior is essential.
Availability
AZ809ANRTR-E1 is available at Aetrix Electronics and suitable for microprocessor power sequencing, battery-powered IoT sensors, and automotive body control modules requiring stable component supply with RoHS-compliant lead-free packaging.
Supply support for AZ809ANRTR-E1 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
BCD Semiconductor Manufacturing Limited is a Shanghai-based analog and mixed-signal IC designer specializing in high-reliability power management and system supervision solutions for industrial and automotive markets.
The AZ809A series was developed specifically for cost-effective, no-component-required reset supervision in resource-constrained embedded systems - emphasizing precision threshold accuracy, ultra-low IQ, and robust transient immunity in compact SOT-23 packaging.
FAQ
What is the exact reset threshold voltage for AZ809ANRTR-E1?
The AZ809ANRTR-E1 has a nominal reset threshold of 2.63V, with a guaranteed range of 2.59V to 2.66V at 25°C and 2.50V to 2.76V across the full -40°C to +105°C operating temperature range. This R-version variant is specifically calibrated for 3.0V system monitoring, not 3.3V or 5.0V rails.
Does AZ809ANRTR-E1 require an external pull-up resistor on the RESET pin?
No. The AZ809ANRTR-E1 features a push-pull output stage that actively drives RESET low during assertion and high during release - eliminating the need for an external pull-up resistor. This reduces component count, board area, and potential leakage paths in low-power designs.
Can AZ809ANRTR-E1 operate reliably when VCC drops below 2.63V but remains above 1.0V?
Yes. The device guarantees valid RESET output down to VCC = 1.0V. Below 1.0V, the output enters high-impedance state and may float; for systems operating near this limit, a 100kΩ pull-down resistor is recommended to maintain known logic state during deep brownout.
How does AZ809ANRTR-E1 handle fast voltage transients on the VCC line?
The AZ809ANRTR-E1 rejects fast negative-going VCC transients up to 20µs duration when undershoot is ≤100mV below the 2.63V threshold. Its internal comparator architecture and optimized response time prevent false resets from switching noise, load-dump events, or DC-DC converter ripple without external filtering.
AZ809ANRTR-E1 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:
- Obsolete
- 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 ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
AZ809ANRTR-E1 FAQ
1.How can I place an order for AZ809ANRTR-E1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AZ809ANRTR-E1 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 AZ809ANRTR-E1 reliable?
The price and inventory of AZ809ANRTR-E1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AZ809ANRTR-E1 is usually 5 days.
3.What payment methods are accepted for AZ809ANRTR-E1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AZ809ANRTR-E1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AZ809ANRTR-E1?
AZ809ANRTR-E1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AZ809ANRTR-E1 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 AZ809ANRTR-E1?
For technical support, including AZ809ANRTR-E1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AZ809ANRTR-E1 requirements.
6.How does Aetrix verify that AZ809ANRTR-E1 is sourced from the original manufacturer or authorized distributors?
All AZ809ANRTR-E1 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 AZ809ANRTR-E1 meets industry standards.
7.What is the process for return or replacement of AZ809ANRTR-E1?
All AZ809ANRTR-E1 units undergo pre-shipment inspection (PSI). If there is an issue with AZ809ANRTR-E1, 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 AZ809ANRTR-E1 part is unused and in its original packaging.
Return procedure for AZ809ANRTR-E1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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