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Home Products Integrated Circuits (ICs)Specialized ICs~~CAT809SEUR-T~~

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CAT809SEUR-T - AMI Semiconductor/onsemi

Name: AMI Semiconductor/onsemi CAT809SEUR-T
Brand: AMI Semiconductor/onsemi
SKU: CAT809SEUR-T
Availability: InStock
Rating: 5 (10 reviews)

Manufacturer Part Number: CAT809SEUR-T

Manufacturer: onsemi

Allelco Part Number: 32D-CAT809SEUR-T

Warranty: 1 Year Allelco Warranty - Find out more

Stock Status:: 9,520 pcs available, New & Original

Parts Description: DAC91001

Data sheet: -

Category: Integrated Circuits (ICs) > Specialized ICs

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In stock: 9520

Specifications

CAT809SEUR-T Tech Specifications
AMI Semiconductor/onsemi - CAT809SEUR-T technical specifications, attributes, parameters and parts with similar specifications to AMI Semiconductor/onsemi - CAT809SEUR-T

Product Attribute	Attribute Value
Part Number	CAT809SEUR-T
Package	DAC91001
Description	DAC91001
Stock Condition	Get 9520 pcs available quantity at Allelco
Payment	PayPal / TT / Credit Card / Western Union
Allelco Certifications	ESD / ISO 9001 / ISO 13485 / ISO 28000

Product Attribute	Attribute Value
Manufacturer	onsemi
RoHs Status	-
Warranty	100% Perfect Functions
Transport port	Hong Kong
Shipping by	DHL / FedEx / UPS / TNT / SF Express
RFQ Email	info@allelco.com

Frequently Asked Questions(FAQ)

How does the CAT809SEUR-T compare to the CAT810SEUR-T in terms of reset threshold voltage and power supply range, and which would be more suitable for a 3.3V microcontroller system with potential brown-out conditions?: The CAT809SEUR-T features a fixed 2.93V reset threshold, while the CAT810SEUR-T offers a slightly higher 3.03V threshold. Both devices support an operating voltage range from 1.6V to 5.5V, making them compatible with 3.3V systems. For a 3.3V microcontroller application, the CAT810SEUR-T may provide better noise margin since its threshold is closer to the nominal supply voltage, reducing the risk of false resets during transient dips. However, if the system experiences significant voltage sag below 3.0V (such as during motor startup or inductive load switching), the CAT809SEUR-T’s lower threshold could offer earlier intervention, potentially improving reliability in harsh power environments.

What are the key differences between the CAT809SEUR-T and other similar supervisor ICs like the MAX809T in terms of package type, response time, and suitability for space-constrained PCB designs?: Unlike the MAX809T, which is available in an 8-pin SOIC package, the CAT809SEUR-T uses a compact SOT23-6 footprint, enabling higher board integration density. The CAT809SEUR-T has a typical reset delay of 200ms, comparable to many standard supervisor ICs, but its ultra-small form factor allows placement near the microcontroller without requiring additional signal routing layers. This makes it particularly advantageous in portable or compact embedded systems where board real estate is limited. The SOT23-6 also supports automated assembly processes, aligning well with high-volume manufacturing workflows.

Can the CAT809SEUR-T be used in battery-powered IoT edge devices that operate at 1.8V and experience frequent voltage fluctuations due to load transients? What design precautions should be taken?: Yes, the CAT809SEUR-T operates reliably down to 1.6V, making it suitable for 1.8V systems common in low-power IoT applications. However, given its 2.93V threshold, it will not trigger during sub-3V operation, so it cannot protect against undervoltage conditions at 1.8V. Therefore, it must be used in conjunction with a dedicated low-voltage regulator or another supervisory circuit capable of monitoring voltages below 2.93V. Additionally, ensure adequate decoupling capacitance near the device input to prevent false triggering from high-frequency noise superimposed on the power rail.

How does the power consumption of the CAT809SEUR-T impact battery life in a wearable health monitor that runs on a coin cell and wakes up periodically for sensor sampling?: The CAT809SEUR-T draws only 1.5µA typical quiescent current, which is negligible compared to most microcontrollers and sensors. In a wearable device waking every 10 seconds for 50ms sampling cycles, the average current contribution from the supervisor IC is approximately 0.75µAh per day—insignificant relative to the main system’s milliamp-level draw. Thus, it does not compromise battery life significantly. Its ultra-low power characteristic actually complements the energy-efficient design strategy, allowing reliable brown-out protection without accelerating discharge rates.

Is the CAT809SEUR-T suitable for automotive-grade applications requiring AEC-Q100 qualification, and what limitations exist regarding temperature range and long-term reliability?: No, the CAT809SEUR-T is not specified for automotive use and lacks AEC-Q100 certification. It is rated for industrial temperature ranges (-40°C to +85°C), which may be insufficient for extreme ambient conditions in engine compartments or outdoor units. While it meets standard commercial reliability benchmarks, extended exposure beyond +85°C could degrade performance due to semiconductor aging effects. For automotive or high-reliability industrial systems, a qualified variant such as the CAT809SAUR-T (with enhanced specs) or an alternative AEC-compliant part should be considered instead.

When selecting between the CAT809SEUR-T and a programmable voltage supervisor with adjustable thresholds, what trade-offs arise in terms of BOM cost, calibration effort, and system flexibility?: The CAT809SEUR-T offers significant advantages in bill-of-materials simplicity and reduced calibration overhead due to its fixed 2.93V threshold, eliminating the need for external resistors or programming logic. This reduces component count by one or two parts compared to adjustable supervisors. However, programmable alternatives allow fine-tuning to match specific MCU tolerances or non-standard supply rails. If the system requires multiple voltage monitoring points or dynamic threshold adjustment, the added complexity of an adjustable supervisor justifies its marginal cost premium. For single-supply, fixed-voltage designs, the CAT809SEUR-T provides optimal balance of cost, accuracy, and ease of implementation.

How does the reset output behavior of the CAT809SEUR-T change under cold-start conditions when power ramps slowly from 0V to 3.3V, and how can this affect microcontroller initialization?: Upon cold start, the CAT809SEUR-T monitors VCC continuously and asserts its open-drain reset output as long as VCC remains below 2.93V. As power gradually rises through this threshold, the device begins releasing the reset line after a typical 200ms delay. If the microcontroller starts executing code before VCC stabilizes above 2.93V, it may enter an undefined state. To ensure robust boot-up, designers should either use a soft-start regulator or add a small hold-up capacitor at the supervisor input to maintain VCC above the threshold during slow ramp phases, ensuring clean, synchronous system reset.

What considerations apply when cascading multiple power domains using the CAT809SEUR-T to supervise both core and I/O rails in a mixed-signal FPGA-based design?: In mixed-signal systems, different rails often have distinct sequencing requirements. The CAT809SEUR-T can independently monitor each rail, but its open-drain output must be wire-ORed across all supervisors, requiring careful attention to propagation delays and drive characteristics. Since the CAT809SEUR-T has a 200ms reset delay, ensure all downstream circuits remain held in reset until all critical rails exceed their respective thresholds. Additionally, avoid connecting outputs directly to noisy digital lines; use pull-up resistors close to the FPGA to minimize crosstalk. Proper layout and isolation between analog and digital grounds further enhance stability in such multi-supervisor configurations.

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Customer Reviews

Evaluation: 10 Articles

Nikh***ech

Aug 13, 2026

Great low-power MCU for portable equipment. Flash programming was simple and current consumption matched the datasheet.
Embe***dMotion

Aug 5, 2026

Purchased this DSP controller for a motor control application. Stable processing performance and very good response under varying loads.
FPGA***dio

Jul 30, 2026

This FPGA handled our logic design without any surprises. Configuration completed quickly and timing met the project requirements.
Nord***mbedded

Jul 20, 2026

Reliable FPGA with predictable behavior. Configuration and testing went smoothly, making development faster than expected.
Arch***ct

Jul 15, 2026

Used this device in a communication signal processing board. Stable timing and no unexpected issues during implementation.
FPGA***lorer88

Jul 7, 2026

The FPGA works properly and all functions operate as expected. Documentation required some additional research, but overall it is a usable device for smaller signal processing projects.
Nath***oleman

Jun 29, 2026

Used this sensor component in an industrial automation setup. Detection accuracy was consistent and installation was straightforward.
Emil***rperTech

Jun 23, 2026

Works exactly as described. I used it as a USB-to-SPI bridge in a small MCU development project and communication was stable from the first setup.
Liam***terTech

Jun 15, 2026

Used this CPLD in a logic control project. Programming was straightforward and signal timing matched the design requirements.
Nath***rooks

Jun 11, 2026

Installed this power component in a converter board. Output remained stable under different load conditions and thermal performance was better than expected.

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Common Countries Logistic Time Reference
Region	Country	Logistic Time(Day)
America	United States	5
America	Brazil	7
Europe	Germany	5
	United Kingdom	4
	Italy	5
Oceania	Australia	6
Oceania	New Zealand	5
Asia	India	4
Asia	Japan	4
Middle East	Israel	6

DHL & FedEx Shipment Charges Reference
Shipment charges(KG)	Reference DHL(USD$)
0.00kg-1.00kg	USD$30.00 - USD$60.00
1.00kg-2.00kg	USD$40.00 - USD$80.00
2.00kg-3.00kg	USD$50.00 - USD$100.00

Note:: The above table is for reference only. There may have some data bias for the uncontrollable factors.
Contact us if you have any questions.

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Electrostatic Discharge Protection and Handling

All electrostatic-sensitive components are handled in accordance with electrostatic discharge control procedures. The products are hermetically sealed in anti-static safe packaging to prevent electrostatic damage. Appropriate labeling is also applied for identification and traceability. This ensures product integrity during storage, handling and transportation.

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Third-party certified, strict quality control. Our certification

ISO 9001: 2015
ISO 13485: 2016
ISO 14001: 2015
ISO 28000: 2007
ISO 45001: 2018
GB/T 27922-2011

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CAT809SEUR-T

AMI Semiconductor/onsemi
32D-CAT809SEUR-T

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Please refer to the English Version as our Official Version.Return

CAT809SEUR-T - AMI Semiconductor/onsemi

Specifications

Frequently Asked Questions(FAQ)

Customers Also Interested in

Recommended Products

Customer Reviews

Evaluation: 10 Articles

Great low-power MCU for portable equipment. Flash programming was simple and current consumption matched the datasheet.

Purchased this DSP controller for a motor control application. Stable processing performance and very good response under varying loads.

This FPGA handled our logic design without any surprises. Configuration completed quickly and timing met the project requirements.

Reliable FPGA with predictable behavior. Configuration and testing went smoothly, making development faster than expected.

Used this device in a communication signal processing board. Stable timing and no unexpected issues during implementation.

The FPGA works properly and all functions operate as expected. Documentation required some additional research, but overall it is a usable device for smaller signal processing projects.

Used this sensor component in an industrial automation setup. Detection accuracy was consistent and installation was straightforward.

Works exactly as described. I used it as a USB-to-SPI bridge in a small MCU development project and communication was stable from the first setup.

Used this CPLD in a logic control project. Programming was straightforward and signal timing matched the design requirements.

Installed this power component in a converter board. Output remained stable under different load conditions and thermal performance was better than expected.