74AC257MTCX

Signal Switches, Multiplexers, Decoders Overview

The onsemi 74AC257MTCX is a quad 2-input multiplexer with 3-STATE outputs, housed in a 16-lead Thin Shrink Small Outline Package (TSSOP). It selects four bits of data from two sources using a common Data Select input. The device operates within a supply voltage range of 2.0V to 6.0V and supports an operating temperature range of -40°C to +85°C. Outputs are noninverting and can source or sink up to 24 mA. Propagation delays vary by voltage; at 5.0V, typical delays for In-to-Zn transitions are 4.0 ns (high-to-low) and 4.0 ns (low-to-high).

Signal Switches, Multiplexers, Decoders Feature Summary

• Quad 2-input multiplexing capability with a single common select line.
• Noninverting 3-STATE outputs allowing direct bus-oriented system interfacing.
• Outputs capable of sourcing and sinking 24 mA current.
• Reduced quiescent supply current and output leakage compared to previous generations.

Signal Switches, Multiplexers, Decoders Applications

• Bus-oriented systems requiring high-impedance state isolation.
• Multiplexer expansion by tying outputs together.
• Data selection between two sources for four-bit parallel transmission.

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific ordering code suffix 'X' confirms tape and reel packaging. Confirm the manufacturer designation as Fairchild Semiconductor or onsemi based on the datasheet revision date. Ensure the TSSOP package width matches the JEDEC MO-153 standard for your PCB layout requirements.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when a quad multiplexer with 3-STATE outputs is required for bus applications. The AC series supports a wide voltage range of 2.0V to 6.0V. Verify that the 24 mA output drive current meets the load requirements. Consider the ACT variant if TTL-compatible inputs are necessary for 5V logic levels.

Signal Switches, Multiplexers, Decoders Part Context

This part belongs to the 74AC family of CMOS logic devices. It is functionally similar to the 74ACT257 but differs in input threshold characteristics. The MTCX suffix indicates the 16-lead TSSOP package configuration supplied in tape and reel format for automated assembly processes.

Signal Switches, Multiplexers, Decoders Replacement Considerations

The 74ACT257MTCX serves as a compatible alternative with TTL-compatible inputs. Other packages such as SOIC (SC), SOP (SJ), and PDIP (PC) offer the same logical functionality in different physical form factors.