IDT74FCT257TP

Overview

The IDT74FCT257TP is a quad 2-input multiplexer belonging to the 74FCT logic series. It features TTL-compatible input and output levels, supporting non-inverting signal selection. The device operates within a supply voltage range of 2.7V to 3.6V or 4.5V to 5.5V. It is housed in a 48-pin DIP package with through-hole mounting. Key electrical parameters include a maximum propagation delay of 5ns at 50pF load, high drive capabilities with -32mA high-level and 64mA low-level output currents, and an operating temperature range from -40°C to +85°C.

Feature Summary

• Quad configuration providing four independent 2-to-1 data selectors
• TTL-compatible interface for direct integration with standard logic families
• High-current output drivers capable of driving heavy capacitive loads

Applications

• Data routing in digital communication systems
• Signal selection in microprocessor-based control circuits
• Address/data bus switching in embedded systems

Procurement Notes

Verify the specific suffix 'TP' confirms the 48-pin PDIP package and through-hole construction. Confirm the manufacturer source, as IDT assets are managed by Renesas Electronics. Ensure the component status is active if new production is required. Cross-reference pinout diagrams with the official datasheet to ensure compatibility with existing PCB footprints.

Selection Notes

Select this component when a quad multiplexer with TTL compatibility is required. The 48-pin DIP package suits prototyping and through-hole manufacturing processes. Consider the 5ns propagation delay and current drive specifications against system timing requirements. Verify that the dual voltage ranges (2.7-3.6V and 4.5-5.5V) align with the target power supply architecture.

Part Context

This part belongs to the 74FCT family, which combines Fast CMOS speed with TTL compatibility. The 74FCT257 specifically implements quad 2-input multiplexing functionality. Integrated Device Technology was acquired by Renesas Electronics, which now manages the product line. The device is designed for high-speed digital applications requiring reliable signal routing.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation.