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HomeProductsIntegrated Circuits (ICs)Specialized ICsCAT809MTBI
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CAT809MTBI - AMI Semiconductor/onsemi

Manufacturer Part Number
CAT809MTBI
Manufacturer
onsemi
Allelco Part Number
32D-CAT809MTBI
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
7,950 pcs available, New & Original
Parts Description
DAC91001
Data sheet
-
Category
Integrated Circuits (ICs) > Specialized ICs
RoHs Status
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In stock: 7950

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Specifications

CAT809MTBI Tech Specifications
AMI Semiconductor/onsemi - CAT809MTBI technical specifications, attributes, parameters and parts with similar specifications to AMI Semiconductor/onsemi - CAT809MTBI

Product Attribute Attribute Value
Part Number CAT809MTBI
Package DAC91001
Description DAC91001
Stock Condition Get 7950 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 CAT809MTBI voltage monitor respond to supply voltage fluctuations, and what is its typical hysteresis behavior for reliable reset signaling?
The CAT809MTBI operates as a precision low-voltage detection circuit with a fixed 4.65V threshold. When the VCC supply rises above this level, the open-drain output asserts low, indicating normal operation. Upon power-down or undervoltage conditions, the output releases when VCC drops below approximately 4.45V due to internal hysteresis—this 200mV window prevents chatter near the trip point. In real-world applications, this hysteresis ensures stable reset assertion during transient dips without requiring external filtering, making it suitable for systems sensitive to glitches.
What are the key differences between the CAT809MTBI and the CAT809LTBIT in terms of electrical characteristics and application suitability?
While both devices share identical core functionality—4.65V threshold with 200mV hysteresis—the CAT809LTBIT features a 1.5ms active-low pulse width on power-up instead of the CAT809MTBI’s 240ms delay. This makes the LTBIT better suited for applications needing faster system initialization after brief power interruptions, whereas the MTBI provides longer hold-off time for slower-ramping supplies. Both maintain the same SOT-23 package and operate over -40°C to +85°C, but their timing behaviors lead to divergent use cases in brownout recovery scenarios.
Can the CAT809MTBI be used in battery-powered IoT edge devices where minimizing current draw is critical during deep sleep modes?
Yes, the CAT809MTBI supports ultra-low power operation with a typical quiescent current of just 1.2µA. Its open-drain architecture allows direct connection to microcontrollers without pull-up resistors if desired, reducing component count. However, designers must ensure the pull-up resistor value balances response speed against leakage current. For sub-1mA average current budgets, pairing the CAT809MTBI with a low-leakage MCU can enable multi-year battery life in intermittent-wake sensor nodes.
What layout considerations are essential when placing the CAT809MTBI near high-speed digital signals or switching regulators to avoid false resets?
Proximity to noisy power rails or fast-edge signals demands careful PCB planning. Place the CAT809MTBI close to the microcontroller’s reset pin with short traces, and route its VCC trace directly from a well-bypassed bulk capacitor near the load rather than cascading from other ICs. A 0.1µF ceramic capacitor within 1mm of the device minimizes inductance-induced overshoot. Avoid parallel routing with clock lines; if unavoidable, use ground guard traces or orthogonal placement to suppress coupled noise that could trigger premature assertion.
How does temperature variation affect the accuracy of the CAT809MTBI’s 4.65V reference, and is compensation needed in extreme environments?
The CAT809MTBI exhibits excellent thermal stability with a maximum reference drift of ±1.5% from -40°C to +85°C. At worst-case extremes, the threshold could shift by up to 70mV, which remains within acceptable bounds for most embedded systems unless operating near brownout margins. No active compensation is required, but designers should verify worst-case thresholds during qualification testing. For precision applications exceeding 1% tolerance needs, additional feedback loops may be necessary despite the part’s inherent stability.
What happens if the CAT809MTBI’s output is pulled high externally while the VCC input falls below the reset threshold?
The open-drain output will actively sink current when asserted, regardless of the external pull-up state. If VCC drops below 4.45V (after hysteresis), the transistor turns on, pulling the output low regardless of any applied high voltage at the pin. This ensures valid logic levels even under fault conditions. However, excessive pull-up currents during prolonged faults may stress the output stage—designers should limit pull-up resistance to values compatible with the device’s sink capability (typically <10kΩ).
Is the CAT809MTBI suitable for automotive-grade systems requiring ISO 16750 compliance, or are there limitations in harsh environments?
The CAT809MTBI meets industrial temperature range (-40°C to +85°C) but lacks AEC-Q100 certification. While it functions reliably in non-automotive harsh environments like industrial controls or outdoor sensors, it is not qualified for full automotive applications per ISO 16750-3 surge and load dump requirements. For automotive use, consider alternative parts explicitly rated to AEC-Q100 Grade 2 or higher. In non-automotive systems with similar thermal stresses, however, the CAT809MTBI offers robust performance without additional derating.
How should one interpret the 240ms delay specification of the CAT809MTBI, and when would this parameter significantly impact system boot sequencing?
The 240ms delay ensures sufficient time for the main supply to stabilize before deasserting reset, preventing premature CPU startup during slow-ramp conditions. In battery-backed systems with long wake cycles (>2 seconds), this delay has negligible impact. However, in fast-boot applications like wearables or always-on sensors where power sequencing must minimize latency, the delay introduces measurable latency—potentially delaying user-perceived responsiveness by up to 240ms. Designers should model total system wake time including this margin when optimizing energy profiles.

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Customer Reviews

Evaluation: 10 Articles

  • 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.

  • Dani***alkerTech
    Jun 1, 2026

    Product works, but setup took more effort than expected. Once configured the MCU ran reliably, although documentation support felt older compared with newer platforms. Fine for maintenance projects.

  • Yuki***aka88
    May 26, 2026

    信号通信プロジェクトでこのRS-485トランシーバーを使用しました。設置は簡単で、長距離ケーブルでも通信は安定していました。消費電力も、以前使用していたものより低くなっています。

  • Stev***aker
    May 20, 2026

    Solid diode for power rectification. Works well in switching circuits.

  • Bran***Lewis
    May 11, 2026

    Compact FPGA with good performance. Suitable for basic signal processing tasks.

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Common Countries Logistic Time Reference
Region Country Logistic Time(Day)
America United States 5
Brazil 7
Europe Germany 5
United Kingdom 4
Italy 5
Oceania Australia 6
New Zealand 5
Asia India 4
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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AMI Semiconductor/onsemi

CAT809MTBI

AMI Semiconductor/onsemi
32D-CAT809MTBI

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