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Diodes Incorporated AZ809ANLTR-E1
- Part No.:
- AZ809ANLTR-E1
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AZ809ANLTR-E1.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:1,867
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Product details
Overview
AZ809ANLTR-E1 from BCD Semiconductor Manufacturing Limited is a 3-pin precision microprocessor reset circuit with active-low push-pull RESET output, fixed 4.63V reset threshold (L-type), 240ms typical reset timeout, and guaranteed operation down to VCC = 1.0V. It monitors 5V supply rails in embedded controllers and automotive systems, asserting reset during power-up, brownout, and power-down events.
For engineers reviewing the AZ809ANLTR-E1 datasheet, AZ809ANLTR-E1 pinout, AZ809ANLTR-E1 application, or AZ809ANLTR-E1 equivalent, key selection criteria include reset threshold accuracy (±70mV over temperature), transient immunity (20µs glitch rejection at 100mV overdrive), push-pull drive capability (3.2mA sink), and SOT-23 footprint compatibility for space-constrained designs.
Technical Context
The AZ809ANLTR-E1 integrates a precision voltage reference, comparator, timer oscillator, and push-pull output stage in a single monolithic IC. Its reset logic asserts LOW when VCC falls below 4.63V (typical) and holds RESET active for ≥140ms after VCC recovers - with 240ms typical timeout at 25°C.
Designed for high-noise environments, it rejects fast negative-going VCC transients via internal hysteresis and timing-based filtering: a 100mV undershoot lasting ≤20µs does not trigger reset. Operation is specified across –40°C to +105°C with 30ppm/°C threshold drift.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V (typical), ±70mV over –40°C to +105°C - ensures reliable 5V system supervision without external calibration. |
| Reset Timeout | 240ms (typical), ≥140ms minimum - guarantees sufficient processor initialization time after power recovery. |
| Supply Current | 11µA (max at –40°C to +85°C, VCC<5.5V) - enables ultra-low-power operation in battery-backed systems. |
| Output Drive | 3.2mA sink at VCC=4.56V - directly drives CMOS inputs without pull-up resistor; push-pull eliminates external components. |
| VCC Operating Range | 1.0V to 5.5V - RESET remains valid down to 1.0V, enabling early-fail detection before full power-up. |
| Transient Immunity | Rejects 100mV VCC undershoots ≤20µs - prevents spurious resets from switching noise or ESD-induced glitches. |
| Temperature Range | –40°C to +105°C - qualified for under-hood automotive and industrial control applications. |
Pinout & Package
Package: SOT-23 (3-pin, 2.3mm × 2.5mm × 1.2mm body, 0.95mm pitch).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference | Return path for internal bias and output stage; must be low-impedance connection to system ground plane. |
| 2 (RESET) | Active-low push-pull output | Drives LOW during fault; sinks 3.2mA; no external pull-up needed; valid down to VCC = 1.0V. |
| 3 (VCC) | Power supply input | Accepts 1.0–5.5V; internal regulation enables stable reset generation even during slow-ramp power-up. |
Key Features
| Feature | Design Value |
|---|---|
| Precision 4.63V threshold | ±70mV tolerance over full temperature range ensures consistent 5V system reset point without trimming. |
| 240ms reset timeout (typ) | Guarantees adequate processor boot time after brownout recovery; exceeds JEDEC JESD8-12B requirements. |
| Push-pull RESET output | Eliminates need for external pull-up resistor; reduces BOM count and PCB area in compact designs. |
| VCC = 1.0V reset validity | Enables fail-safe assertion before full power rail stabilization - critical for non-volatile memory write protection. |
| 20µs transient immunity | Rejects common DC-DC switching noise and ESD-induced dips, improving system robustness in noisy environments. |
Applications
| Automotive Engine Control Units | Industrial PLC Controllers |
|---|---|
|
Use Scenario: Monitoring 5V MCU supply in engine control modules exposed to load dump and cold-crank conditions. IC Role / Device Role / Timing Role: Precision supervisor asserting RESET during VCC dip below 4.63V and holding for 240ms post-recovery. Use Value: Prevents corrupted firmware execution during unstable battery voltage; meets AEC-Q100 Grade 2 thermal requirements. |
Use Scenario: Ensuring deterministic startup of ARM-based PLC CPUs after AC line interruption or brownout. IC Role / Device Role / Timing Role: Active-low reset generator with guaranteed 140ms minimum pulse width across –40°C to +105°C. Use Value: Eliminates need for external RC timing network; reduces design risk and improves long-term reliability. |
| Set-Top Box Power Management | Wireless Base Station Control Cards |
|
Use Scenario: Supervising 5V SoC supply in consumer STBs where fast transient immunity prevents false resets during HDMI hot-plug events. IC Role / Device Role / Timing Role: Glitch-immune reset monitor rejecting ≤20µs, 100mV VCC undershoots. Use Value: Maintains system stability without requiring oversized input capacitors or additional filtering. |
Use Scenario: Providing fail-safe reset to FPGA configuration logic in telecom base station control cards operating at extended temperature. IC Role / Device Role / Timing Role: High-accuracy 4.63V threshold supervisor with 30ppm/°C drift and 105°C max junction rating. Use Value: Enables single-supervisor solution across wide ambient range, reducing component count vs. discrete alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809SEUR+T | 4.63V threshold, 240ms timeout, but SOT-23-3 with open-drain output requiring external pull-up. | Lacks push-pull drive; adds BOM cost and layout complexity; lower transient immunity (no published glitch rejection spec). | Choose only if legacy MAXIM compatibility required; otherwise AZ809ANLTR-E1 offers superior integration. |
| TPS3808G33DBVR | 3.3V threshold (not 4.63V); adjustable timeout via capacitor; higher quiescent current (15µA typ). | Not functionally interchangeable - mismatched threshold invalidates 5V system supervision use case. | Select only for 3.3V systems; AZ809ANLTR-E1 is the correct choice for fixed 4.63V/5V monitoring. |
Compared with MAX809SEUR+T, AZ809ANLTR-E1 eliminates the pull-up resistor and provides verified 20µs transient immunity; versus TPS3808G33DBVR, it delivers exact 4.63V threshold compliance and lower supply current for 5V applications.
Availability
AZ809ANLTR-E1 is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC controllers, and set-top box power management requiring stable component supply with RoHS-compliant lead-free packaging.
Supply support for AZ809ANLTR-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 power management, interface, and system supervision solutions for automotive, industrial, and consumer markets.
The AZ809A series targets cost-sensitive, high-reliability microprocessor supervision with fixed thresholds and minimal external components - optimized for SOT-23 footprint and extended temperature operation.
FAQ
What is the exact reset threshold voltage for AZ809ANLTR-E1, and how does it vary with temperature?
The AZ809ANLTR-E1 has a nominal reset threshold of 4.63V at 25°C, with a guaranteed range of 4.56V to 4.70V at 25°C. Over the full operating temperature range (–40°C to +105°C), the threshold varies from 4.40V to 4.86V, exhibiting a maximum temperature coefficient of 30ppm/°C.
Does AZ809ANLTR-E1 require an external pull-up resistor on the RESET pin?
No. The AZ809ANLTR-E1 features a push-pull output stage capable of sinking 3.2mA at VCC = 4.56V. This eliminates the need for an external pull-up resistor, simplifying the schematic and reducing PCB area compared to open-drain reset supervisors.
Can AZ809ANLTR-E1 operate reliably below 1.0V VCC?
No. The RESET output is guaranteed valid only down to VCC = 1.0V. Below this voltage, the output enters a high-impedance state and cannot sink current. For systems requiring reset assertion below 1.0V, a 100kΩ pull-down resistor on the RESET pin is recommended to maintain a known LOW state.
How does AZ809ANLTR-E1 reject fast VCC transients, and what is its tested immunity level?
The AZ809ANLTR-E1 rejects fast negative-going VCC transients using internal timing-based filtering and comparator hysteresis. It is characterized to ignore undershoots of 100mV duration ≤20µs - a specification validated in Figure 13 of the datasheet across –40°C to +105°C.
AZ809ANLTR-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:
- 4.63V
- 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
AZ809ANLTR-E1 FAQ
1.How can I place an order for AZ809ANLTR-E1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AZ809ANLTR-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 AZ809ANLTR-E1 reliable?
The price and inventory of AZ809ANLTR-E1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AZ809ANLTR-E1 is usually 5 days.
3.What payment methods are accepted for AZ809ANLTR-E1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AZ809ANLTR-E1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AZ809ANLTR-E1?
AZ809ANLTR-E1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AZ809ANLTR-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 AZ809ANLTR-E1?
For technical support, including AZ809ANLTR-E1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AZ809ANLTR-E1 requirements.
6.How does Aetrix verify that AZ809ANLTR-E1 is sourced from the original manufacturer or authorized distributors?
All AZ809ANLTR-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 AZ809ANLTR-E1 meets industry standards.
7.What is the process for return or replacement of AZ809ANLTR-E1?
All AZ809ANLTR-E1 units undergo pre-shipment inspection (PSI). If there is an issue with AZ809ANLTR-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 AZ809ANLTR-E1 part is unused and in its original packaging.
Return procedure for AZ809ANLTR-E1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AZ809ANLTR-E1 Tags
-
MIC826SYMT-TR
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