74LCX244MSA

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The 74LCX244MSA is a low voltage integrated circuit (IC) buffer/line driver. It is an 8-bit to 3-state buffer/line driver with Octal bus-hold circuitry and an active low output enable control input making it a perfect device for a wide variety of digital or mixed-signal applications requiring increased drive and low-voltage operation. This low-level device has four input signals, four output signals, and an enable input. It is designed to improve system performance and reduce propagation delays. In addition, the device is designed to enhance system noise immunity and reduce EMI.

Application Field

The 74LCX244MSA device has a wide variety of applications in digital and mixed-signal systems, including communication systems, audio systems, point-of-sale systems, medical systems, industrial control systems, and automotive electronics. Some of its more common applications are data bus applications, bus repeaters, bus switches, memory address/data buses, clock/data/strobe buses, logic latches, multiplexers/demultiplexers, address/data latch, and transceivers.

Working Principle

The 74LCX244MSA has a tri-state output capability designed to enhance system level noise immunity and reduce EMI. The device is organized as eight 3-state buffers. The outputs can be independently enabled or disabled by the active-low Output Enable (OE )input. When OE is low, the output at each buffer is disabled and the output goes to a high-impedance state.

The 74LCX244MSA uses the Octal Bus-Hold feature which isolates the buffer inputs from the bus when the inputs are at a High level. This feature eliminates the need for external pull-up or pull-down resistors and also reduces power consumption.

The 74LCX244MSA also features a bus-hold circuitry on the data input. This function allows switches driven by external bus inputs to remain in their last state when the bus is at a high or low condition. The device can also be used as a transparent latch that passes data from the input to the output when enabled.

The 74LCX244MSA also features a low-power stand-by mode for improved power efficiency. When enabled, the device switches to stand-by mode and the outputs enter into a high-impedance state and reduce power consumption. The device is also designed to meet the requirements of Level 1 (-1) HBM and Latch-up Free.

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