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Diodes Incorporated AZ7045RTR-E1
- Part No.:
- AZ7045RTR-E1
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-243AA
- Datasheet:
-
AZ7045RTR-E1.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT89
- Quantity:
- Payment:
- Shipping:
Inventory:2,410
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Product details
Overview
AZ7045RTR-E1 from BCD Semiconductor Manufacturing Limited is a precision voltage detector IC with 4.5 V detection threshold, open-collector output, and SOT-89 package. It monitors supply rails in embedded systems, provides reset signaling during brownout events, and operates down to 0.8 V supply while consuming only 30 µA typical quiescent current at 5.25 V. Designed for CPU reset generation and low-battery indication in industrial and home appliance power management.
For engineers reviewing the AZ7045RTR-E1 datasheet, AZ7045RTR-E1 pinout, AZ7045RTR-E1 application, or AZ7045RTR-E1 equivalent, this page delivers verified electrical parameters, validated SOT-89 terminal mapping, real-world use cases including processor reset and battery backup control, and two confirmed alternative parts with documented functional differences.
Technical Context
The AZ7045RTR-E1 integrates a precision on-chip voltage reference and comparator to detect falling VCC below 4.5 V (±0.15 V tolerance), triggering an active-low open-collector output after 10 µs propagation delay. Hysteresis of 50 mV typical prevents noise-induced false resets during marginal supply conditions.
It functions across -40°C to +85°C, supports minimum operating voltage of 0.8 V, and maintains output sink capability of 16 mA over full temperature range. The device requires no external components and relies solely on internal reference accuracy and comparator response for deterministic reset assertion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Detect Voltage | 4.5 V ±0.15 V - precise threshold for 5 V rail monitoring with guaranteed trip point |
| Hysteresis Voltage | 50 mV typical - prevents oscillation during slow-rising/falling supply transitions |
| Quiescent Current (ICCH) | 30 µA typical at 5.25 V - enables long-term battery operation without significant drain |
| Minimum Operating Voltage | 0.8 V typical - ensures valid output behavior even during deep brownout recovery |
| Output Sink Current | 16 mA over -40°C to +85°C - drives standard pull-up resistors and logic inputs directly |
| Propagation Delay (tpHL) | 10 µs - fast response to supply collapse, critical for reliable CPU reset timing |
| Temperature Range | -40°C to +85°C - qualified for industrial and consumer appliance environments |
Pinout & Package
The AZ7045RTR-E1 is housed in a 3-pin SOT-89 surface-mount package with gull-wing leads, thermal pad on underside, and JEDEC-standard footprint (4.4–4.6 mm × 2.3–2.6 mm × 1.5 mm height). Pin 1 = VCC, Pin 2 = GND, Pin 3 = OUT (open-collector).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (VCC) | Supply Input | Power rail input; must exceed 0.8 V for valid operation and 4.5 V to maintain high-Z output state |
| Pin 2 (GND) | Ground Reference | Return path for internal circuitry and output sink current; shared with system ground plane |
| Pin 3 (OUT) | Open-Collector Output | Active-low reset signal; requires external pull-up resistor to define logic-high level and sink up to 16 mA |
Key Features
| Feature | Design Value |
|---|---|
| Precision Detect Threshold | 4.5 V ±0.15 V with ±0.01 %/°C tempco - eliminates need for external trimming in 5 V systems |
| Ultra-Low Quiescent Current | 30 µA typical at 5.25 V - extends battery life in portable and backup power applications |
| Built-in Hysteresis | 50 mV typical - removes requirement for external hysteresis network in noisy supply environments |
| Robust Output Drive | 16 mA sink capability over full temperature range - interfaces directly with microcontroller reset pins |
| Wide Supply Range | Operates from 0.8 V to 18 V - supports both low-voltage monitoring and high-side rail supervision |
Applications
| Processor Reset Generator | Low Battery Voltage Detector |
|---|---|
|
Use Scenario: Microcontroller-based embedded system requiring clean power-on and brownout reset signaling. IC Role / Device Role / Timing Role: Voltage detector asserting active-low reset until VCC rises above 4.5 V + 50 mV hysteresis. Use Value: Guarantees CPU remains held in reset until stable 5 V supply is established, preventing erratic boot behavior. |
Use Scenario: Portable medical device powered by dual AA batteries discharging from 3.2 V to 2.4 V. IC Role / Device Role / Timing Role: Monitors main supply rail and triggers LED warning when voltage drops below 4.5 V threshold. Use Value: Provides early alert before critical undervoltage condition, enabling graceful shutdown or user notification. |
| Power Fail Indicator | Battery Backup Control |
|
Use Scenario: Industrial PLC with redundant 24 V DC supply where loss of primary source must be flagged within 20 µs. IC Role / Device Role / Timing Role: Detects rapid VCC drop below 4.5 V and asserts fault signal via open-collector output. Use Value: Enables immediate switchover to secondary supply with sub-20 µs detection-to-alert latency. |
Use Scenario: Smart meter with main AC supply and lithium coin-cell backup maintaining RTC and memory during outages. IC Role / Device Role / Timing Role: Supervises main rail and disables backup switch when VCC exceeds 4.5 V, enabling automatic fallback. Use Value: Eliminates need for discrete MOSFET control logic; simplifies BOM and improves reliability of backup activation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage detector applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803SDBZR | 4.5 V threshold, 350 nA max IQ, SOT-23-3 package, push-pull output | Lower power but incompatible output type; requires redesign of pull-up network and load interface | Select when ultra-low IQ dominates design priority and output drive can be reconfigured |
| MAX809SEUR+T | 4.63 V threshold, ±2% accuracy, SOT-23-3, open-collector, 15 µA IQ | Higher threshold tolerance (±2% vs ±3.3%) and tighter tempco (±100 ppm/°C), but lower sink current (12 mA) | Select when higher accuracy and lower IQ are required, and 12 mA output drive suffices |
Compared with TLV803SDBZR and MAX809SEUR+T, AZ7045RTR-E1 offers superior output drive (16 mA) and wider operating voltage range (0.8–18 V), making it optimal for legacy 5 V systems with heavy reset loads or variable input rails.
Availability
AZ7045RTR-E1 is available at Aetrix Electronics and suitable for industrial control systems, home electric appliances, and battery-powered instrumentation requiring stable component supply and RoHS-compliant packaging.
Supply support for AZ7045RTR-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 and foundry partner specializing in power management, protection, and sensing solutions.
The AZ70XX series was developed specifically for cost-sensitive, high-volume voltage monitoring in consumer and industrial electronics, emphasizing low IQ, robust hysteresis, and compatibility with standard PCB assembly processes.
FAQ
What is the exact detect voltage tolerance for AZ7045RTR-E1?
The AZ7045RTR-E1 has a detect voltage of 4.5 V with a guaranteed range of 4.35 V to 4.65 V at 25°C, corresponding to ±0.15 V absolute tolerance. This specification is tested under RL = 200 Ω load with VOL ≤ 0.4 V, per the manufacturer's Electrical Characteristics table.
Can AZ7045RTR-E1 operate from a 3.3 V supply?
No - the AZ7045RTR-E1 is designed to monitor a 4.5 V threshold and requires VCC ≥ 4.5 V to hold its output high; however, it will assert reset if VCC falls below 4.35 V. It cannot supervise a 3.3 V rail because its detection point exceeds that rail's maximum voltage.
Is an external pull-up resistor required for the open-collector output?
Yes - the OUT pin is open-collector and must be pulled up to a logic-compatible voltage (e.g., 3.3 V or 5 V) via an external resistor. Typical values range from 10 kΩ to 100 kΩ depending on rise time and bus capacitance requirements.
Does AZ7045RTR-E1 support operation below -40°C?
No - the specified operating temperature range is strictly -40°C to +85°C. Performance outside this range is not characterized or guaranteed; junction temperature must remain within these limits for reliable reset timing and threshold accuracy.
AZ7045RTR-E1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-243AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Voltage Detector
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.5V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-89-3
AZ7045RTR-E1 FAQ
1.How can I place an order for AZ7045RTR-E1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AZ7045RTR-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 AZ7045RTR-E1 reliable?
The price and inventory of AZ7045RTR-E1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AZ7045RTR-E1 is usually 5 days.
3.What payment methods are accepted for AZ7045RTR-E1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AZ7045RTR-E1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AZ7045RTR-E1?
AZ7045RTR-E1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AZ7045RTR-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 AZ7045RTR-E1?
For technical support, including AZ7045RTR-E1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AZ7045RTR-E1 requirements.
6.How does Aetrix verify that AZ7045RTR-E1 is sourced from the original manufacturer or authorized distributors?
All AZ7045RTR-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 AZ7045RTR-E1 meets industry standards.
7.What is the process for return or replacement of AZ7045RTR-E1?
All AZ7045RTR-E1 units undergo pre-shipment inspection (PSI). If there is an issue with AZ7045RTR-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 AZ7045RTR-E1 part is unused and in its original packaging.
Return procedure for AZ7045RTR-E1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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