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Diodes Incorporated AZ7045ZTR-E1
- Part No.:
- AZ7045ZTR-E1
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Datasheet:
-
AZ7045ZTR-E1.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL TO92
- Quantity:
- Payment:
- Shipping:
Inventory:3,141
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Product details
Overview
AZ7045ZTR-E1 from BCD Semiconductor Manufacturing Limited is a precision under-voltage detector IC with fixed 4.5 V detection threshold, open-collector output, and low-power operation (30 µA typical quiescent current at 5.25 V). It monitors supply rails in microcontroller-based systems, provides reset signaling during power-on and brownout events, and features built-in 50 mV hysteresis to suppress noise-induced false triggering - used in battery backup control and home appliance power supervision.
For engineers reviewing the AZ7045ZTR-E1 datasheet, AZ7045ZTR-E1 pinout, AZ7045ZTR-E1 application, or AZ7045ZTR-E1 equivalent, this device serves as a cost-optimized, lead-free voltage monitor for industrial and consumer embedded systems requiring stable reset generation across -40°C to +85°C.
Technical Context
The AZ7045ZTR-E1 employs an on-chip precision voltage reference and comparator architecture to compare VCC against a trimmed 4.5 V threshold (±0.15 V tolerance). Its open-collector output requires external pull-up and sinks up to 16 mA over temperature while maintaining ≤0.4 V low-level output voltage at 200 Ω load.
Operation relies on two distinct thresholds: VDET− = 4.35 V (falling edge detection) and VDET+ = 4.45 V (rising edge release), yielding 100 mV max hysteresis. Minimum operating voltage is 0.8 V, enabling valid output behavior even during deep brownout recovery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Detect Voltage | 4.35 V (min) to 4.65 V (max); ensures reliable reset assertion when main supply drops below 4.5 V nominal |
| Hysteresis Voltage | 30–100 mV; prevents oscillation during noisy or slowly varying supply conditions |
| Quiescent Current | 30 µA typical at 5.25 V; enables long-term battery monitoring without significant drain |
| Output Type | Open-collector; supports flexible logic-level translation and wired-OR reset bus configurations |
| Operating Temp | −40°C to +85°C; validated for use in consumer appliances and industrial control enclosures |
| Min Operating Voltage | 0.8 V typical; guarantees defined output state down to near-dead-battery levels |
| Reset Delay | 10 µs (falling), 15 µs (rising); fast enough for modern MCU reset timing requirements |
Pinout & Package
AZ7045ZTR-E1 is supplied in TO-92 package (ammo packing format), with 3-pin through-hole configuration and JEDEC-standard mechanical dimensions. Pin 1 = Output (open-collector), Pin 2 = Ground, Pin 3 = VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (OUT) | Open-collector output | Sinks current when VCC < VDET−; requires external pull-up resistor for logic-high state |
| Pin 2 (GND) | Ground reference | Return path for internal circuitry and output sink current; must be low-impedance |
| Pin 3 (VCC) | Supply input | Monitored voltage rail; powers internal reference and comparator; operates from 0.8 V to 18 V |
Key Features
| Feature | Design Value |
|---|---|
| Low-power operation | 30 µA typical supply current at 5.25 V enables multi-year battery life in portable detectors |
| Precision threshold | 4.5 V ±3% detection with ±0.01 %/°C tempco ensures stable trip point across operating range |
| Noise-immune hysteresis | 50 mV typical hysteresis eliminates chatter during marginal supply transitions |
| Robust output drive | 16 mA sink capability at −40°C to +85°C supports direct interface to TTL/CMOS inputs |
| Wide supply range | Operates from 0.8 V to 18 V VCC - compatible with Li-ion, alkaline, and regulated 5 V/3.3 V rails |
Applications
| Low Battery Voltage Detector | Power Fail Indicator |
|---|---|
Use Scenario: Monitoring single-cell Li-ion or 3×AA alkaline battery packs in portable medical devices. IC Role / Device Role / Timing Role: Voltage supervisor asserting active-low reset when battery falls below 4.5 V, preventing data corruption during shutdown. Use Value: Enables graceful firmware save-and-halt before brownout, leveraging 0.8 V minimum operating voltage for final-state capture. |
Use Scenario: Detecting AC mains loss in uninterruptible power supplies for smart home hubs. IC Role / Device Role / Timing Role: Generates immediate power-fail flag to trigger backup capacitor discharge and safe state storage. Use Value: 10 µs response time ensures no instruction loss during sub-cycle grid interruptions. |
| Processor Reset Generator | Battery Backup Control |
Use Scenario: Providing clean power-on reset to ARM Cortex-M0+ microcontrollers in industrial sensors. IC Role / Device Role / Timing Role: Monitors 3.3 V LDO output and asserts reset until VCC exceeds 4.5 V × (1 + hysteresis), ensuring stable core voltage. Use Value: Built-in hysteresis eliminates reset bounce during LDO startup overshoot or ripple. |
Use Scenario: Enabling switchover from main supply to backup coin cell in real-time clock modules. IC Role / Device Role / Timing Role: Detects main rail collapse and triggers MOSFET gate control for seamless backup activation. Use Value: Open-collector output interfaces directly to level-shifting logic controlling backup power path. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803EB33DBZR | 3.3 V fixed threshold, SOT-23-3, 1.8 µA IQ, push-pull output | Lower threshold and ultra-low IQ suit always-on wearables; push-pull eliminates external pull-up | Select when system requires <3.5 V detection and minimal standby current |
| MAX809SEUR+T | 3.08 V threshold, SOT-23-3, 12 µA IQ, open-collector, ±1.5% accuracy | Narrower tolerance and higher accuracy support precision reset in telecom line cards | Select when tighter threshold tolerance (±1.5%) and industry-standard footprint are required |
Compared with TLV803EB33DBZR and MAX809SEUR+T, AZ7045ZTR-E1 offers higher detection voltage (4.5 V), TO-92 compatibility for legacy through-hole designs, and optimized hysteresis for noisy industrial environments - making it ideal for cost-sensitive, high-volume appliance reset circuits.
Availability
AZ7045ZTR-E1 is available at Aetrix Electronics and suitable for home electric appliances, battery-powered instrumentation, and industrial embedded controllers requiring stable component supply with RoHS-compliant lead-free packaging.
Supply support for AZ7045ZTR-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, protection, and sensing solutions for consumer, industrial, and automotive markets.
The AZ70XX series was developed to deliver high-accuracy, low-cost voltage supervision for cost-sensitive embedded systems - emphasizing robustness, wide supply range, and ease of integration in legacy and new designs.
FAQ
What is the recommended pull-up resistor value for the open-collector output?
For standard 5 V or 3.3 V logic interfacing, a 10 kΩ pull-up resistor is recommended. This ensures sufficient rise time (<100 ns with 10 pF load) while limiting current to <0.5 mA during output low state. Values between 4.7 kΩ and 100 kΩ are acceptable depending on speed and power trade-offs.
Can AZ7045ZTR-E1 operate from a 2.5 V supply?
No. The minimum operating voltage is 0.8 V, but the 4.5 V detection threshold requires VCC ≥ 4.5 V to assert valid output states. Below 4.35 V, the output pulls low; below 0.8 V, output behavior is undefined. It is not intended for 2.5 V rail monitoring.
Does AZ7045ZTR-E1 require an external capacitor on the VCC pin?
No external bypass capacitor is mandatory, but a 0.1 µF ceramic capacitor placed within 5 mm of the VCC and GND pins is strongly recommended to suppress high-frequency noise that could affect detection stability - especially in motor-driven or switching-power-supply environments.
Is AZ7045ZTR-E1 qualified for automotive applications?
No. AZ7045ZTR-E1 is specified for −40°C to +85°C operation and is not AEC-Q100 qualified. It lacks automotive-grade screening, extended temperature validation, and failure-in-time (FIT) data - intended for industrial and consumer equipment only.
AZ7045ZTR-E1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Packaging:
- Tape & Box (TB)
- 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:
- Through Hole
- Supplier Device Package:
- TO-92
AZ7045ZTR-E1 FAQ
1.How can I place an order for AZ7045ZTR-E1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AZ7045ZTR-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 AZ7045ZTR-E1 reliable?
The price and inventory of AZ7045ZTR-E1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AZ7045ZTR-E1 is usually 5 days.
3.What payment methods are accepted for AZ7045ZTR-E1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AZ7045ZTR-E1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AZ7045ZTR-E1?
AZ7045ZTR-E1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AZ7045ZTR-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 AZ7045ZTR-E1?
For technical support, including AZ7045ZTR-E1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AZ7045ZTR-E1 requirements.
6.How does Aetrix verify that AZ7045ZTR-E1 is sourced from the original manufacturer or authorized distributors?
All AZ7045ZTR-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 AZ7045ZTR-E1 meets industry standards.
7.What is the process for return or replacement of AZ7045ZTR-E1?
All AZ7045ZTR-E1 units undergo pre-shipment inspection (PSI). If there is an issue with AZ7045ZTR-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 AZ7045ZTR-E1 part is unused and in its original packaging.
Return procedure for AZ7045ZTR-E1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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