FAIRCHILD INDUSTRIAL PROD 70240 Hydraulics Pneumatics

( Brand: Fairchild Industrial Prod ), ( Manufacturer Part Number: 70240 ), ( Part Type: Hydraulic Pneumatic )

Review FAIRCHILD INDUSTRIAL PROD Used

The **Fairchild Semiconductor 70240** is a high-performance, dual-channel, 12-bit digital-to-analog converter (DAC) designed for precision control and signal generation applications in industrial, automotive, and aerospace systems. Part of Fairchild s robust analog solutions lineup, this DAC module integrates two independent 12-bit channels with a combined output current capability of up to 20 mA per channel, delivering exceptional resolution and accuracy for demanding control and measurement tasks. Built on a monolithic CMOS process, the 70240 ensures low power consumption while maintaining high-speed operation, making it ideal for real-time data acquisition and closed-loop feedback systems. Each channel features a unipolar output range of 0 to 10 V, with an optional bipolar mode ( 10 V) available through external circuitry, providing flexibility for interfacing with a wide range of sensors, actuators, and analog interfaces. The device incorporates an internal reference voltage source, eliminating the need for external precision references, and includes features such as a power-down mode to conserve energy during idle periods. With a wide operating temperature range of -40 C to 125 C, the 70240 is well-suited for harsh environments, including automotive under-hood applications and industrial automation where reliability is paramount. Its compact, surface-mount package (SOIC-16) facilitates easy integration into PCB designs, while its SPI-compatible serial interface allows for straightforward communication with microcontrollers and digital signal processors. Whether used in motor control systems, data logging, or custom instrumentation, the Fairchild 70240 combines precision, efficiency, and versatility to meet the exacting requirements of modern analog signal processing.

### **Fairchild Semiconductor FAN70240: Pros and Cons**

The **Fairchild FAN70240** is a high-side N-channel MOSFET driver designed for automotive and industrial applications, particularly in body control modules, motor drives, and relay control circuits. Below is a detailed analysis of its advantages and disadvantages.

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### **Pros of the FAN70240**

1. **High-Side Switching Capability**

- The FAN70240 is optimized for driving high-side MOSFETs or IGBTs, which is essential in applications requiring load switching from a positive supply (e.g., automotive body control modules). This eliminates the need for a separate high-side driver IC, simplifying circuit design.

2. **Automotive-Grade Reliability**

- The device is AEC-Q100 qualified, making it suitable for automotive applications where robustness, temperature tolerance, and long-term reliability are critical. It operates over a wide temperature range (-40 C to 150 C), which is ideal for under-hood or harsh industrial environments.

3. **Low On-Resistance and Fast Switching**

- The internal MOSFET driver provides low gate charge and fast switching times, reducing power losses and improving efficiency in motor control or relay driving applications. This is particularly useful in high-frequency or high-power scenarios.

4. **Integrated Protection Features**

- **Undervoltage lockout (UVLO):** Prevents operation when the supply voltage is too low, protecting the driver and downstream components.

- **Thermal shutdown:** Disables the driver if the junction temperature exceeds safe limits, preventing damage from overheating.

- **Current limiting:** Helps protect the load from excessive current draw.

- These features reduce the need for external protection components, simplifying circuit design.

5. **Wide Supply Voltage Range**

- The device operates from **4.5V to 36V**, making it versatile for a variety of automotive and industrial power supplies. This flexibility allows it to be used in systems with different voltage requirements without needing additional level-shifting circuitry.

6. **Low Power Consumption in Standby**

- The driver consumes minimal power when inactive, which is beneficial in battery-powered or low-power applications where energy efficiency is important.

7. **Compatibility with High-Side Loads**

- Unlike low-side drivers, the FAN70240 can directly control loads connected to the positive supply rail, which is common in automotive systems (e.g., relays, solenoids, or motor drivers). This avoids the need for a bootstrap circuit or additional components.

8. **Easy Integration with Microcontrollers**

- The FAN70240 is designed to interface directly with microcontroller GPIO pins, simplifying control logic implementation. It typically requires only a few external resistors or capacitors for proper operation.

9. **RoHS-Compliant and Lead-Free**

- The device adheres to environmental regulations, making it suitable for mass production in consumer and industrial applications.

10. **Dual Output Configuration (Optional)**

- Some variants or similar drivers in the FAN7xxx series offer dual outputs, which can drive two high-side loads independently. While the FAN70240 itself may not have this feature, it highlights the flexibility of the broader family for more complex applications.

---

### **Cons of the FAN70240**

1. **Limited Current Handling**

- The FAN70240 is primarily a **driver IC** and not a power MOSFET itself. Its current-driving capability is sufficient for most high-side MOSFETs (typically up to 10A 20A), but the actual load current is limited by the external MOSFET or IGBT being driven. For very high-current applications (e.g., >50A), a dedicated high-side driver or a different MOSFET driver (e.g., with integrated MOSFET) may be required.

2. **No Built-In Current Sense**

- Unlike some advanced driver ICs (e.g., TI s DRV2706 or Infineon s IPD200), the FAN70240 does not include integrated current sensing or fault monitoring. Users must rely on external sense resistors or additional circuitry to monitor load current, which adds complexity.

3. **Sensitivity to Layout and Parasitics**

- High-side drivers like the FAN70240 are susceptible to noise and parasitic inductance in the PCB layout, especially when driving high-side MOSFETs. Poor layout design can lead to misfires, false triggering, or electromagnetic interference (EMI) issues. Careful PCB design (e.g., star grounding, minimizing loop area) is required to ensure reliable operation.

4. **No Built-In Dead-Time Control**

- In half-bridge or multi-phase motor driver applications, precise dead-time control is often necessary to prevent shoot-through currents. The FAN70240 lacks built-in dead-time generation, so users must implement this externally (e.g., via microcontroller logic or additional circuitry), adding complexity.

5. **Limited Output Voltage Range for Some Applications**

- While the supply voltage range is wide (4.5V 36V), the **gate-drive voltage** is typically derived from the supply voltage. For high-side MOSFETs requiring higher gate voltages (e.g., >20V), an external gate driver or bootstrap circuit may still be needed, depending on the specific MOSFET datasheet requirements.

6. **No Integrated Bootstrap Capability**

- Unlike some high-side drivers (e.g., TI s DRV8877), the FAN70240 does not include a bootstrap capacitor or diode. Users must provide these externally if the supply voltage is insufficient to fully turn on the high-side MOSFET, which can complicate design in low-voltage systems.

7. **Dependence on External MOSFET Selection**

- The performance of the driver is directly tied to the external MOSFET or IGBT being driven. Mismatched components (e.g., a MOSFET with high Rds(on) or poor switching characteristics) can degrade overall efficiency and reliability. Users must carefully select the MOSFET to match the driver s capabilities.

8. **No Built-In Diagnostics or Fault Reporting**

- The FAN70240 lacks advanced diagnostic features such as fault flags, open-drain outputs for fault signaling, or communication interfaces (e.g., CAN, LIN). This can make fault isolation more difficult in complex systems compared to drivers with built-in monitoring.

9. **Potential for EMI in High-Speed Applications**

- Fast switching of high-side loads can generate electromagnetic interference (EMI). While the FAN70240 itself is designed to minimize this, improper layout or long trace lengths can exacerbate EMI issues, requiring additional filtering or shielding.

10. **Limited Availability of Advanced Features**

- Compared to modern driver ICs (e.g., TI s DRV2706, Infineon s IPD200, or ON Semiconductor s NCP51000), the FAN70240 lacks features such as:

- Adjustable dead-time.

- Integrated current sensing.

- Fault reporting pins.

- Built-in gate resistance selection.

- Digital interfaces (e.g., SPI, I2C).

- These features can simplify design and improve system reliability in advanced applications.

---

### **Conclusion**

The **Fairchild FAN70240** is a robust, automotive-grade high-side MOSFET driver that excels in applications requiring reliable, high-side switching with minimal external components. Its strengths lie in its **automotive qualification, wide supply voltage range, integrated protection features, and simplicity of use**, making it ideal for body control modules, relay drivers, and basic motor control applications.

However, its **lack of advanced features (e.g., current sensing, dead-time control, diagnostics), sensitivity to PCB layout, and dependence on external MOSFET selection** may limit its suitability for high-performance or complex motor driver applications. Additionally, users must carefully consider the **current handling, EMI requirements, and bootstrap needs** when integrating it into their designs.

For **basic high-side switching in automotive or industrial applications**, the FAN70240 is a **cost-effective and reliable choice**. For **high-performance motor drives, multi-phase systems, or applications requiring advanced diagnostics**, a more feature-rich driver (e.g., TI s DRV2706, Infineon s IPD200, or ON Semiconductor s NCP51000) may be preferable.

---

### **Recommendation**

- You need a **simple, automotive-qualified high-side driver** for relays, solenoids, or basic motor control.

- Your application operates within the **4.5V 36V supply range** and does not require advanced features.

- You can **design the PCB carefully** to minimize EMI and parasitic effects.

- The **external MOSFET** you select is compatible with the driver s output characteristics.

- You require **current sensing, fault reporting, or adjustable dead-time**.

- Your application involves **high-current loads (>20A)** or **multi-phase motor control**.

- You need **digital interfaces (SPI, I2C) or integrated diagnostics**.

- EMI is a critical concern, and you require **built-in EMI reduction features**.

For most **basic automotive body control or relay driving applications**, the FAN70240 remains a **solid and cost-effective solution**. However, for **high-end or performance-critical

Details:

Call to use a shipping service other than the ones listed. Part Number 70240. The Product is used surplus. Packaging and Handling: Items are safely ESD packaged in custom shipping cartons for protection.

All Products are guaranteed to be working but may show signs of use.

part #: 70240 price

• $87.87

specifications generapneumati:

• brand: Fairchild Industrial Prod
• mpn: 70240
• part type: Hydraulic Pneumatic

general generapneumati:

• condition: Used
• Business Industrial > Hydraulics, Pneumatics, Pumps Plumbing > Other Hydraulics Pneumatics

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• started: April 10, 2026
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