CD74HC257E

The CD74HC257E from Texas Instruments is a high-speed CMOS logic IC featuring quad 2-input multiplexers with non-inverting 3-state outputs. This device selects four bits of data from two sources under the control of a common Select Input (S), with an active-low Output Enable input (OE\).

Key electrical specifications include an operating voltage range of 2V to 6V and a wide operating temperature range from -55°C to 125°C. The typical propagation delay is 12ns at VCC = 5V with a 15pF load capacitance. Standard outputs support a fanout of 10 LSTTL loads, while bus driver outputs support 15 LSTTL loads.

This multiplexer is available in a 16-PDIP package and is designed for through-hole mounting. Its configuration allows for moving data from two groups of registers to four common output buses, making it suitable for various digital logic applications. The high noise immunity and significant power reduction compared to LSTTL logic ICs are characteristic of the HC types.

The CD74HC257E is part of the HC family, offering 2V to 6V operation and high noise immunity. It is suitable for applications requiring reliable digital signal routing and selection.