74LS151N 8-to-1 TTL Multiplexer IC, DIP-16

74LS151N digital data selector

The 74LS151N is an 8-to-1 digital multiplexer in a DIP-16 through-hole package. Three select inputs determine which of eight digital data inputs is routed through the logic device. Complementary outputs provide opposite logic states for the selected signal.

This LS-family device suits compatible TTL logic projects, educational circuits and digital signal selection. It is not an analog multiplexer, analog-to-digital converter or memory device.

Listed IC specifications

• Part designation: 74LS151N.
• Function: eight-input digital data selector / multiplexer.
• Select inputs: three.
• Logic family: low-power Schottky TTL.
• Supply: nominal 5V; confirm permitted limits in the relevant datasheet.
• Package: 16-pin DIP.
• Control: active-low strobe input.

Check logic compatibility before connection

Use the pinout for the exact manufacturer marking on the supplied IC. Observe package orientation, supply polarity, input requirements and output loading. Strobe operation must be wired as specified; do not assume that disabling the device creates high-impedance outputs.

Nominal supply voltage alone does not establish compatibility with another circuit. Check input thresholds and output voltage limits before connecting a 3.3V microcontroller or other logic family, and use suitable level interfacing where required.

Manufacturer origin and a particular speed grade are not established here. For related parts, browse logic devices at EPRO.

Frequently asked questions

Can it switch an analog sensor voltage?

No. This is a digital TTL multiplexer, not an analog switch.

How many select lines does it use?

Three binary select lines choose among the eight data inputs.