FST34X2245QSPX

Overview

The FST34X2245QSPX is a 32-bit high-speed CMOS bus switch designed for TTL-compatible applications. It features integrated 25/Ω series resistors in the output path to reduce signal reflection noise, eliminating the need for external terminating components. The device operates within a supply voltage range of 4.0V to 5.5V and supports an operating temperature range from -40°C to +85°C. It utilizes a flow-through architecture where the On Enable (OEn) pin controls connectivity between Port A and Port B.

Feature Summary

• Integrates 25/Ω series resistors to minimize signal reflection noise without requiring external termination
• Provides minimal propagation delay through the switch with zero bounce in flow-through mode
• Features low quiescent supply current and control inputs compatible with TTL logic levels

Applications

• High-speed data bus switching in digital systems
• Signal routing between TTL-compatible ports
• Data transmission lines requiring controlled impedance matching

Procurement Notes

Verify that the component matches the MQA80A package designation for the 80-lead QVSOP form factor. Confirm the specific ordering suffix corresponds to the required lead finish configuration. Ensure the device meets the specified electrical characteristics for your target operating voltage and temperature conditions before finalizing procurement.

Selection Notes

Select this component when a 32-bit bus switch with built-in series resistance is required to dampen signal reflections. It is suitable for applications needing TTL-compatible control signals and low power consumption. Consider the 80-lead package constraints and ensure the board layout accommodates the physical dimensions of the QVSOP package.

Part Context

This part belongs to the FST34X family of bus switches, which are engineered for high-speed data transfer. The FST34X2245 serves as a 32-bit variant within this lineup, offering expanded channel count compared to narrower bit-width versions while maintaining the same core switching technology and interface compatibility standards.

Replacement Considerations

The datasheet identifies the FST32245 as a related 32-bit version within the product family. Verify functional equivalence regarding pinout and electrical parameters before substituting.