FST3244QSCX

Overview

The FST3244QSCX is an 8-bit bus switch manufactured by onsemi, organized as two independent four-bit switches with separate output enable inputs. It operates within a supply voltage range of 4.0 V to 5.5 V and supports an operating temperature range from -40°C to +85°C. The device features a typical on-resistance of 4 Ω at 4.5 V and a propagation delay of 0.25 ns. It utilizes a 20-lead Thin Shrink Small Outline Package (TSSOP) with a width of 4.4 mm.

Feature Summary

• Provides eight-bits of high-speed CMOS bus switching in a standard '244 pin-out configuration
• Features low on-resistance to connect inputs to outputs without adding propagation delay or generating ground bounce noise
• Control inputs are compatible with TTL levels for simplified interface integration

Applications

• High-speed data bus switching applications
• Portable systems requiring low power consumption
• Consumer electronics utilizing CMOS logic interfaces

Procurement Notes

Verify the specific ordering suffix against current manufacturer documentation to ensure correct package type and tape-and-reel specifications. Confirm that the Q-series designation aligns with required quality standards for the intended application environment before finalizing procurement orders.

Selection Notes

Select this component when designing circuits requiring bidirectional data transfer with minimal signal distortion. Ensure the system voltage remains within the 4.0 V to 5.5 V range and verify that the thermal requirements fit within the specified -40°C to +85°C operational window for reliable performance.

Part Context

This device belongs to the FST3244 family of bus switches, which are designed to replace traditional buffers in high-speed digital applications. The product line emphasizes low power consumption and fast switching speeds, making it suitable for modern portable electronic devices where space and energy efficiency are critical design constraints.

Replacement Considerations

Check for updated part numbers due to Fairchild Semiconductor integration into ON Semiconductor, specifically regarding underscore to dash nomenclature changes. Verify pin compatibility and electrical characteristics against existing designs to ensure seamless substitution without circuit modification.