SN74AXC4T774BQBR

### Overview of the Texas Instruments SN74AXC4T774BQBR

The SN74AXC4T774BQBR from Texas Instruments is a high-speed, low-voltage, quad-channel bus switch designed to provide efficient signal routing and switching for a wide range of digital applications. This device belongs to the AXC family of logic devices and is specifically engineered for use in systems requiring fast, high-fidelity signal transfer with low power consumption. The SN74AXC4T774BQBR offers excellent performance in terms of speed, noise immunity, and signal integrity, making it suitable for applications in automotive, industrial, and consumer electronics.

The device is a quad-channel multiplexer, which means it is capable of switching multiple signals in parallel, providing a versatile solution for systems requiring signal routing or multiplexing between different buses. It operates at low voltage levels, making it suitable for modern, energy-efficient designs.

### Key Features

1. High-Speed Operation
The SN74AXC4T774BQBR supports a high-speed switching rate, with a maximum data rate of 400 Mbps. This makes it ideal for systems that require fast data transfer with minimal delay, such as communication systems, data acquisition, and high-speed signal routing applications.

2. Low-Voltage Operation
The device operates across a voltage range of 1.65 V to 3.6 V, making it compatible with modern low-voltage logic systems. This ensures that it is suitable for battery-powered, portable devices, and energy-efficient applications.

3. Low Power Consumption
With low quiescent current consumption, typically around 0.01 µA, the SN74AXC4T774BQBR is highly power-efficient, making it an excellent choice for low-power applications. This is especially important in portable devices, where battery life is a critical factor.

4. Bus Switch Functionality
The device functions as a bus switch, allowing for the bidirectional transfer of signals between connected buses. This feature is useful in applications such as multiplexing, signal routing, and high-speed switching between various circuits within a system.

5. Automatic Direction Control
The SN74AXC4T774BQBR automatically detects and switches between input and output signals without the need for an external control signal. This automatic direction control feature simplifies system design by eliminating the need for additional control logic.

6. Low ON Resistance
The device offers a low ON resistance (typically 5 Ω) when the bus switch is enabled, which minimizes signal loss and ensures high-fidelity signal transmission, particularly important in high-speed or high-frequency applications.

7. High Noise Immunity
The SN74AXC4T774BQBR is designed to provide robust performance even in electrically noisy environments. Its differential signaling and excellent noise immunity make it suitable for industrial automation systems, automotive applications, and other environments where noise can degrade signal integrity.

8. Wide Temperature Range
The device is capable of operating across an extended temperature range from -40°C to +125°C, making it ideal for automotive, industrial, and other harsh environments where temperature extremes are common.

9. Protection Features
The SN74AXC4T774BQBR includes built-in protection against overvoltage conditions and short circuits, ensuring long-term reliability and durability in demanding applications. This is essential for systems where maintaining signal integrity and protecting sensitive components is critical.

10. Multiple Channels
The device provides four channels for signal routing, allowing it to handle multiple buses or signals simultaneously. This is particularly useful in applications where multiple devices or signal paths need to be switched or multiplexed at the same time.

### Electrical Specifications

* Operating Voltage (Vcc):
The SN74AXC4T774BQBR operates within a voltage range of 1.65 V to 3.6 V, ensuring compatibility with a wide variety of modern low-voltage logic systems.

* Input Voltage (V\_in):
The input voltage range for the SN74AXC4T774BQBR is 0 V to Vcc, allowing it to handle logic signals without the risk of over-voltage damage.

* ON Resistance (R\_on):
The ON resistance of the switch is typically 5 Ω at Vcc = 3.3 V, which ensures minimal signal degradation and high fidelity in signal transmission.

* Switching Time (t\_pd):
The propagation delay time for the device is typically 0.7 ns, enabling it to switch signals at very high speeds with minimal latency, ideal for high-performance systems.

* Maximum Data Rate:
The maximum data rate supported by the SN74AXC4T774BQBR is 400 Mbps, making it suitable for fast data communication and real-time signal switching.

* Quiescent Current (I\_q):
The typical quiescent current in the OFF state is 0.01 µA, which minimizes power consumption in idle or standby modes, making it ideal for battery-powered applications.

* Capacitance (C\_l):
The capacitance between the channels is typically 3 pF, ensuring low signal attenuation and minimal impact on high-frequency signals.

* Output Voltage Swing (V\_oh / V\_ol):
The output voltage swing is typically Vcc - 0.4 V for high-level output (V\_oh) and 0.4 V for low-level output (V\_ol), ensuring clear and reliable signal transitions.

* Operating Temperature Range:
The device is designed to operate within a temperature range of -40°C to +125°C, making it suitable for automotive and industrial environments with extreme temperature fluctuations.

### Applications

1. Signal Multiplexing and Routing
The SN74AXC4T774BQBR is ideal for use in signal multiplexing applications, where multiple buses or signals need to be switched between different devices or subsystems. This is commonly seen in communication systems, test equipment, and industrial control systems.

2. High-Speed Communication Systems
With its high-speed switching capabilities and low ON resistance, the device is well-suited for high-speed communication systems, including serial communication, Ethernet, and data bus systems where fast, reliable switching is required.

3. Automotive Applications
The SN74AXC4T774BQBR is perfect for automotive systems that require signal routing between ECUs (Electronic Control Units) or sensors. Its wide temperature range and high noise immunity make it a reliable solution for automotive communication networks.

4. Industrial Automation
In industrial automation systems, the SN74AXC4T774BQBR provides efficient signal routing between various control systems, sensors, and communication buses. Its robustness against electrical noise ensures stable operation in harsh industrial environments.

5. Consumer Electronics
The device is used in consumer electronics, such as audio/video systems, where signal switching between different devices is required. Its low power consumption and small package size make it a great fit for portable electronics.

6. Data Acquisition and Measurement Systems
The SN74AXC4T774BQBR is suitable for data acquisition systems where fast signal switching and multiplexing are needed to route signals from sensors or measurement equipment to processors or data storage systems.

### Package and Availability

The SN74AXC4T774BQBR is available in a TSSOP-16 package, which provides a compact, space-efficient solution for various systems, particularly where space constraints are a concern. The device is available from authorized distributors and Texas Instruments directly.

### Conclusion

The SN74AXC4T774BQBR is a versatile, high-performance bus switch designed for high-speed signal routing and multiplexing applications. Its low-voltage operation, low power consumption, high switching speed, and excellent noise immunity make it an ideal choice for systems requiring efficient, reliable signal transmission in automotive, industrial, and consumer electronics. With its wide operating temperature range and built-in protection features, it ensures long-term reliability and stable performance in harsh environments. Whether used in automotive communication, industrial automation, or high-speed data systems, the SN74AXC4T774BQBR provides an optimal solution for high-performance signal switching.