SN74CB3Q3244

The SN74CB3Q3244 is a high-speed, low-power octal bus switch from Texas Instruments designed for signal routing in digital systems. It features eight independent channels, each capable of transmitting data between two buses or circuits with minimal signal degradation. The device operates over a supply voltage range of 1.65 V to 3.6 V, making it compatible with both low-voltage and mixed-voltage environments commonly found in modern portable electronics and embedded systems. This bus switch incorporates advanced CMOS technology, offering ultra-low static power consumption—typically less than 1 µA at 3.3 V—and fast propagation delays under 3 ns at 3.3 V. Its high drive capability allows it to interface efficiently with various logic families, including TTL, LVTTL, and LVCMOS, ensuring robust performance across diverse system architectures. Each channel includes a built-in level shifter that enables seamless communication between different voltage domains without external components. The SN74CB3Q3244 supports bidirectional signal flow, allowing data transmission in either direction depending on the control input state. It features an active-low enable (OE) pin that provides global control over all eight channels, enabling system-level power management and reducing unnecessary switching activity during idle periods. This functionality enhances overall system efficiency and reduces electromagnetic interference (EMI). Designed for reliability and ease of integration, the device uses a compact 32-pin TSSOP package, minimizing board space while maintaining excellent thermal performance. It is qualified for operation across a wide temperature range—from -40°C to +85°C—making it suitable for industrial, automotive, and consumer applications where environmental conditions may vary significantly. Common applications include data path multiplexing in microcontroller-based systems, memory address routing in embedded processors, and signal isolation in multi-voltage designs such as those found in smartphones, tablets, and IoT devices. Its ability to handle high-frequency signals with minimal skew and crosstalk makes it ideal for use in high-speed interfaces like USB, HDMI, and PCIe when used as a configurable buffer or selector. In summary, the SN74CB3Q3244 delivers a combination of speed, flexibility, and low power consumption, making it a versatile solution for complex digital signal routing tasks in contemporary electronic systems.