FST34X245QSPX

Overview

The FST34X245QSPX is a 32-bit bus switch manufactured by onsemi, formerly Fairchild Semiconductor. It provides high-speed CMOS and TTL-compatible bus switching in a standard flow-through mode. The device features a low on-resistance of 4 ohms typical at VCC = 4.5V, allowing inputs to connect to outputs without adding propagation delay or generating additional ground bounce noise. It operates within a supply voltage range of 4.0V to 5.5V and supports an operating temperature range from -40°C to +85°C.

Feature Summary

• Provides 32-bits of high-speed bus switching with minimal propagation delay.
• Features low on-resistance to prevent ground bounce noise generation.
• Control inputs are compatible with TTL logic levels.
• Operates in zero-bounce flow-through mode.

Applications

• High-speed data bus interconnects
• TTL-to-CMOS level translation interfaces
• Low-noise signal routing applications

Procurement Notes

Verify the specific ordering code suffix 'QSP' against current manufacturer documentation to confirm package type and tape/reel specifications. Ensure compatibility with the required 80-lead QVSOP package dimensions. Confirm that the component meets the necessary environmental standards for the intended application environment before finalizing procurement orders.

Selection Notes

Select this component when a 32-bit wide bus interface is required with minimal signal distortion. The low on-resistance makes it suitable for applications sensitive to ground bounce. Ensure the system design accommodates the 80-lead package size and that the control logic aligns with the specified TTL input voltage thresholds for reliable operation.

Part Context

This part belongs to the FST34X245 series of 32-bit bus switches. It serves as a 32-bit version of the FST3245 device. The product line focuses on providing high-speed switching capabilities while maintaining compatibility with standard logic families. The series is designed for applications requiring efficient data transfer across multiple parallel lines.

Replacement Considerations

The datasheet identifies the FST3245 as a related device, noting that the FST34X245 is its 32-bit version. Verify pinout and electrical characteristics when substituting with other 32-bit bus switches from different manufacturers to ensure functional equivalence.