STMicroelectronics M74HC138B1R - 3-to-8 Line Decoder/Demultiplexer

The M74HC138B1R is a high-speed CMOS 3-to-8 line decoder/demultiplexer fabricated by STMicroelectronics. This integrated circuit is designed to accept three binary weighted inputs (A0, A1, and A2) and, based on their value, activate one of the eight mutually exclusive outputs. The device features three enable inputs, two active-low (E1, E2) and one active-high (E3). The M74HC138B1R is capable of operating in a wide voltage range from 2V to 6V, making it suitable for a variety of applications across different logic families.

With its high noise immunity and low power consumption, the M74HC138B1R is optimized for use in systems where power efficiency and operational stability are crucial. The device's demultiplexing capability makes it an excellent choice for applications that require the distribution of a single input signal into multiple paths, such as in address decoding for memory modules, control signal routing, and data multiplexing.

The M74HC138B1R is offered in a 16-pin DIP (Dual In-line Package) making it easy to integrate into both prototyping and production environments. Its robust design ensures that it can withstand the rigors of both industrial and consumer applications. The device also features latch-up performance that exceeds 100mA per JESD 78, Class II, ensuring reliable operation even under stressful conditions.

Key features of the M74HC138B1R include:

• Low power dissipation: ICC = 4µA (max) at TA = 25°C
• High noise immunity: VNIH = VNIL = 28% VCC (min)
• Power down protection is provided on all inputs and outputs
• Pin and function compatible with 74 series 138
• Multiple package options for versatile design integration

Overall, the STMicroelectronics M74HC138B1R is a versatile and reliable component that can be utilized in a wide range of electronic systems. Its high functionality and compatibility with industry-standard logic levels make it an essential part of any digital logic designer's toolkit.