The SN74LS21D is a high-performance, dual 4-input AND gate integrated circuit from Texas Instruments, designed to operate with exceptional speed and reliability. This small-scale logic gate is a crucial component in digital electronics, offering the ability to perform logical conjunctions in a variety of applications such as computer systems, data processing, industrial controls, and more.

Key Features

• Logic Type: Dual 4-Input Positive-AND Gates
• Package: SOIC-14 (Small-Outline Integrated Circuit)
• Operating Voltage: 4.75 V to 5.25 V, compatible with TTL (Transistor-Transistor Logic) levels
• High-Speed Performance: Typical propagation delay as low as 15 ns
• Low Power Consumption: Power-saving LS (Low-Power Schottky) technology
• Drive Capability: Capable of driving two low-power Schottky loads
• Temperature Range: Suitable for operation between 0°C and 70°C

Product Description

The SN74LS21D is a member of the 74LS family, known for its low-power consumption and high-speed operation. This device contains two individual 4-input gates, each of which performs the logical AND function. The output of each gate is high only when all four inputs are high, allowing for complex gating functions in digital circuits.

Constructed with Bipolar Junction Transistor (BJT) technology, the SN74LS21D ensures fast switching times and a high degree of reliability. The SOIC-14 packaging is compact and suitable for surface-mount technology, making it easy to integrate into modern printed circuit boards (PCBs).

With its direct interface capability to TTL, NMOS, and CMOS, the SN74LS21D is highly versatile and can be used in various logic-level translation applications. Moreover, its low power consumption and high noise immunity make it an excellent choice for portable and noise-sensitive electronic devices.

Whether you're designing a complex digital system or looking for a reliable logic gate for simple conjunction operations, the SN74LS21D from Texas Instruments is an excellent choice that combines performance, efficiency, and ease of use.