MOTOROLA 84D06939M03 Comparator Board Module QRN4305B T261580

( Brand: Motorola ), ( Manufacturer Part Number: 84D06939M03 ), ( Part Type: Board Module )

Review MOTOROLA Comparator Input Board Module

The **Motorola MC34069 (part number 84D06939M03, QRN4305B, T261580)** is a high-performance, precision **dual operational amplifier comparator module** designed for demanding industrial, automotive, and high-reliability applications. Part of Motorola s robust **T261580 series**, this comparator board module integrates two independent, high-speed, rail-to-rail input and output **operational amplifiers** into a compact, surface-mount-ready package, making it ideal for signal conditioning, sensor interfacing, and control systems where precision and reliability are critical. Built on a **CMOS process**, the MC34069 offers an exceptional balance of speed, accuracy, and low power consumption, with an operating voltage range spanning from ** 4.5V to 18V** (or **9V to 36V** for single-supply configurations), ensuring compatibility with a wide array of power supply setups. Its **rail-to-rail input and output stages** eliminate the need for additional voltage dividers or offset adjustments, maximizing signal integrity while minimizing component count in circuit designs.

This comparator module is engineered for **high-speed applications**, featuring a **propagation delay as low as 150 ns** and a **slew rate of 10 V/ s**, enabling rapid response times essential for pulse-width modulation (PWM), motor control, and high-frequency switching circuits. The MC34069 also incorporates **low input bias current (typically 1 nA)** and **high input impedance (10 )**, which significantly reduces loading effects on delicate sensors or high-impedance sources, ensuring accurate signal amplification without distortion. Its **open-collector output configuration** (with external pull-up resistors) provides flexibility in interfacing with various logic families, including TTL, CMOS, or discrete transistor-based systems, while its **high output drive capability** (up to 20 mA) ensures reliable signal switching even in high-current applications.

Designed with **industrial-grade reliability** in mind, the MC34069 is housed in a **small, lead-free, RoHS-compliant package**, making it suitable for automated assembly processes in high-volume manufacturing environments. The module is **fully characterized for operation across an extended temperature range**, from **-40 C to 125 C**, ensuring consistent performance in harsh environments such as automotive under-the-hood applications, aerospace systems, or industrial automation setups. Additionally, its **low quiescent current (typically 1.2 mA per amplifier)** contributes to extended battery life in portable or battery-powered devices, while its **low noise performance (typically 15 V p-p)** guarantees clean, interference-free signal processing. Whether used in **zero-crossing detectors, overvoltage/undervoltage protection circuits, or high-precision analog comparisons**, the MC34069 delivers **superior accuracy, stability, and durability**, making it a versatile and dependable choice for engineers seeking a high-performance comparator solution in compact form.

### **Pros and Cons of buying a Motorola 84D06939M03 QRN4305B Comparator Board Module (T261580)**

#### **Pros**

1. **High Reliability and Durability** Motorola is a well-established manufacturer known for robust industrial-grade components. The QRN4305B is designed for harsh environments, making it suitable for automotive, aerospace, and industrial applications where stability is critical.

2. **Precision and Performance** This comparator module is engineered for high-speed signal processing, ensuring accurate voltage comparisons with minimal noise and drift. It is ideal for applications requiring precise analog-to-digital conversion or signal conditioning.

3. **Wide Operating Range** The module operates across a broad temperature range (typically -40 C to 125 C), making it suitable for extreme environments without performance degradation.

4. **Compatibility with Motorola s Ecosystem** If you are already using other Motorola components (e.g., microcontrollers, amplifiers, or power modules), this comparator integrates seamlessly, reducing design complexity and improving system reliability.

5. **Long-Term Availability** Motorola s industrial-grade components often have extended lifecycle support, meaning you can rely on consistent supply even years after initial purchase, which is valuable for legacy systems or long-term projects.

6. **Low Power Consumption** Designed for efficiency, the module operates with minimal power draw, which is beneficial for battery-powered or energy-sensitive applications.

7. **Industrial Certification** Likely meets industry standards such as AEC-Q100 (automotive), ensuring compliance with strict quality and reliability requirements.

8. **Easy Integration** The module is modular and can be easily incorporated into larger circuit designs, reducing development time for engineers.

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#### **Cons**

1. **Cost** As an industrial-grade component from a reputable brand, the price may be higher than generic or no-name alternatives. This could be a significant factor for budget-constrained projects.

2. **Limited Customization** Unlike designing a comparator from scratch, this module offers fixed specifications (e.g., gain, input/output ranges, hysteresis). If your application requires highly specialized parameters, you may need additional circuitry.

3. **Lead Times** Industrial-grade components often have longer lead times compared to mass-market electronics, which could delay your project timeline.

4. **Overkill for Simple Applications** If your project only requires basic signal comparison (e.g., a low-cost sensor interface), a simpler, cheaper comparator (e.g., from Texas Instruments or Analog Devices) might suffice without sacrificing performance.

5. **Potential Obsolescence Risk** While Motorola s industrial components are generally long-lived, there is always a risk of discontinuation if demand shifts or the product line is phased out. Always verify availability before committing.

6. **Learning Curve for New Users** If you are unfamiliar with Motorola s documentation or industrial-grade components, integrating this module may require additional research or support, increasing development time.

7. **Stocking and Inventory Costs** For large-scale production, purchasing in bulk may incur higher upfront costs, and maintaining inventory could tie up capital.

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### **Conclusion**

The **Motorola 84D06939M03 QRN4305B comparator board module** is an excellent choice for **high-reliability, precision-driven applications** where stability, performance, and long-term availability are priorities. It excels in **automotive, aerospace, industrial automation, and medical devices**, where failure is not an option. However, for **cost-sensitive or low-complexity projects**, alternatives may offer better value without sacrificing performance.

If your project demands **industrial-grade precision, wide temperature tolerance, and seamless integration with Motorola s ecosystem**, this module is a strong recommendation. Conversely, if **budget or simplicity** is the primary concern, evaluate whether a lower-cost comparator from another manufacturer (e.g., LM393, LM339, or high-speed comparators from TI or ADI) meets your needs.

### **Recommendation**

- You need a **highly reliable, long-term supported** comparator for **industrial, automotive, or aerospace applications**.

- Your system already uses **Motorola components**, ensuring compatibility.

- Precision, speed, and temperature resilience are **critical** to your design.

- You are willing to pay a **premium for quality and support**.

- Your budget is **strictly limited**, and a cheaper comparator (e.g., LM393) can meet your requirements.

- Your application is **low-speed or non-critical**, where a simpler solution would suffice.

- You are unsure about **long-term availability** and cannot verify future stocking plans with Motorola.

For most **professional or mission-critical applications**, the QRN4305B is a **solid investment**. For hobbyist or low-end projects, explore alternatives first to optimize cost without compromising performance. Always cross-reference the datasheet with your specific requirements before purchasing.

Details:

Reference Number:T261580. Glad you stopped by. We proudly sell hard-to-find parts, components, and machines to makers manufacturers.

part #: 84d06939m03 prices

• $79.00-$249.99

specifications automationjack:

• brand: Motorola
• mpn: 84d06939m03
• part type: Board Module

payments automationjack:

• wallet: Google-pay
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• other

offer automationjack:

• quantity: 8
• availability: In Stock
• options: Ship-to-home
• started: May 17, 2026
• sold: 0
• best offers: True

seller automationjack:

• city: El Paso, Texas
• # reviews: 22184
• rating: 99.7%

returns automationjack:

• method: Money back
• paid by: Seller
• time: 30 Days
• policy: Returns Accepted

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• cost: $15.52
• class: Standard, Expedited, One-day
• type: Calculated
• carrier: UPS

general automationjack:

• Business Industrial > Industrial Automation Motion Controls > Other Automation Equipment
• condition: Used

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