74ACT1284MSAX

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The 74ACT1284MSAX is a Logic - Specialty Logic device from Texas Instruments. This integrated circuit provides 6 buffered outputs, with user-selectable input logic levels appropriate for TTL logic families. Its features make it very suitable for applications like clock distribution, scanning and logic expansion.

The 74ACT1284MSAX is designed to operate over the extended temperature range of -55°C to +125°C. The chip is available in 13-pin small-outline MSA (thin shrink small-outline package) and 14-pin plastic shrink small outline packages, providing a thermally enhanced mechanical footprint.

The device can be used in a variety of applications, including clocking problems in frequency multiplication, arbitration, sequencing, logic expansion, and I/O Expander. It is also well-suited for many industrial, embedded and consumer applications, including automotive, medical devices, mobile devices, and communication systems. The device is ideal for applications that require high speed and power conservation.

The 74ACT1284MSAX extends the range of input logic levels from TTL levels to the more extended range of 3.3V (ESD) levels. This allows more options for board-level design. Each output is buffered by two inverters connected in a Schmitt-trigger configuration. This provides improved logic noise immunity and extended logic input levels for improved noise rejection.

The device works on the following principle. Each pair of buffered outputs are independently controlled by a selectable input logic level. Outputs may be enabled at the logic “1” voltage level, or at a user-selected TTL or 3.3V logic voltage level. The output logic levels can be changed individually or simultaneously with a single command. For example, if input logic level of 3.3V is enabled, output logic level of “1” will be at 3.3V. This design concept allows the users to operate the device with different logic levels, providing improved noise immunity and increased system flexibility.

The 74ACT1284MSAX was designed with low power consumption in mind. Its power requirements are typically 12 mA at 5V and 27µA in power-down mode. The device also features active-low Cascade enable pins (AEN and BEN) to enable bulk power-down of the device whenever desired. Since the device is powered by the 3.3V supply, it includes ESD protection for the main supply, which enables safe and reliable power management.

The 74ACT1284MSAX provides an ideal solution for a variety of applications that require low-power and/or multiple logic level operations. It is a versatile device that provides enhanced signal integrity, extended logic input levels, improved noise immunity, and extended temperature range. It is an ideal choice for high-performance applications such as clocks, counters, logic expansion, and I/O extenders.

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