STMicroelectronics M74HC151B1R Multiplexer

The M74HC151B1R is a high-speed CMOS 8-channel multiplexer manufactured by STMicroelectronics, a leader in semiconductor solutions. This device is designed to select one bit of data from up to eight sources under the control of three binary selection inputs (S0, S1, and S2). It is particularly suitable for implementing logic functions and increases the flexibility and performance of a digital system by allowing different signal lines to be shared.

The M74HC151B1R operates like a standard 8-to-1 multiplexer, but its CMOS technology ensures reduced power consumption, high noise immunity, and a wide operating voltage range. It is compatible with LSTTL outputs, which allows for easy integration into digital systems that utilize both CMOS and TTL logic. With its low on-resistance, it is capable of driving heavy loads without significant signal degradation.

Featuring a 3-state output (Y) that can be either active or in a high impedance state, the M74HC151B1R allows for direct connection to a bus-organized system without the need for interface or pull-up components. This 3-state feature also facilitates the use of multiple multiplexers on the same output line, greatly expanding system capabilities without requiring additional hardware.

The M74HC151B1R is offered in a DIP-16 package, making it convenient for breadboard prototyping and for use in traditional through-hole PCB designs. The robust design of this multiplexer ensures it can operate over a broad temperature range, making it suitable for industrial applications.

Key features of the M74HC151B1R include:

• High-speed operation: TPD = 16 ns (typ) at VCC = 5 V
• Low power dissipation: ICC = 4 µA (max) at TA = 25 °C
• Wide operating voltage range: VCC (operational) = 2 V to 6 V
• High noise immunity: VNIH = VNIL = 28% VCC (min)
• Low noise: VOLP = 0.8 V (max) at VCC = 4.5 V
• Latch-up performance exceeds 300 mA
• ESD performance: HBM > 2000 V, MM > 200 V

Whether for use in multiplexing digital or analog signals, the M74HC151B1R from STMicroelectronics offers a high-performance and reliable solution for designers and engineers looking to optimize their digital systems.