74ACT138SJX

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The 74ACT138SJX is a high-speed, low-power (1.6 W maximum) CMOS device from Texas Instruments, designed for use in logic-signal switches, multiplexers, and decoders. It contains 3 address inputs defining 8 mutually exclusive outputs, in addition to a complementary output which enables simple expansion to 16 outputs.

The device has an input voltage range of 2V to 6V, ideal for low power digital systems where both slow and fast power-saving designs are required. It has high speed, tri-state outputs which can be switched from a low to high state in less than 10 n Sec, and can keep switching at speeds of up to 600 MHz. It has a wide supply range of 2V-5.5V and an operating temperature range of 0°C to 70°C.

The 74ACT138SJX works by using three address inputs (A0-A2) to generate 8 data outputs that are mutually exclusive and active low. The data outputs are connected to the active low and active high complement outputs which allows for easy expansion of the device from 8 to 16 outputs. The device can be enabled and disabled via the common input (G). When G is high, the outputs are enabled and when G is low, the outputs are disabled and will go into a high-impedance state.

The device is commonly used in applications such as: data buses and memory decoding, address decoding and selection, and code conversion. It can also be utilized in multiplexers, input/output ports, and applications that require more than four outputs at a single address. It is most commonly used in low power digital systems because it requires little current to operate and can work at speeds of up to 600MHz.

In summary, the 74ACT138SJX is a high-speed, low-power CMOS device which is designed for use in logic-signal switches, multiplexers, and decoders. It has a wide supply range and an operating temperature range of 0°C to 70°C. It is commonly used in low-power digital systems where both slow and fast power-saving designs are required. It works by using three address inputs (A0-A2) to generate 8 data outputs, which can be further expanded to 16 outputs with the help of the complementary outputs.

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