74FCT2244CTSOG

Series:	74FCT
Packaging:	Tube
Part Status:	Active
Logic Type:	Buffer, Non-Inverting
Number of Elements:	2
Number of Bits per Element:	4
Input Type:	--
Output Type:	3-State
Current - Output High, Low:	15mA, 12mA
Voltage - Supply:	4.75 V ~ 5.25 V
Operating Temperature:	-40°C ~ 85°C (TA)
Mounting Type:	Surface Mount
Package / Case:	20-SOIC (0.295", 7.50mm Width)
Supplier Device Package:	20-SOIC
Base Part Number:	74FCT2244

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The 74FCT2244CTSOG is a high-speed 4-bit noninverting bus transceiver that is designed specifically for high-performance memory and logic-level translation applications. The device has two separate buffers with direction ports that enable the receivers and drivers to be independently enabled. Each transmitter features a high-current output driver whose outputs source or sink up to 24 mA. The transmitters may also be used as 3-STATE buffers.The 74FCT2244CTSOG is constructed with advanced CMOS process technology as a multi-complemented design, which provides inherent bus-hold and bus-tie capabilities. This device is pin and function-compatible with the AM79C074 which is the equivalent part number in the FC series.The 74FCT2244CTSOG offers low power consumption, enhanced noise immunity and speed performance. It operates from a single +3.3V supply or from dual +5V/+3.3V supplies. The logic thresholds are CMOS compliant, and the device can be used tointerface 5V/TTL systems to 3.3V systems.The 74FCT2244CTSOG can be assigned to a wide range of applications, including memory and logic-level translation. Other applications include bus-hold assertion in multiplexers, bus management in state machines and parity checking in networks.Working PrincipleThe working principle behind the 74FCT2244CTSOG is fairly straightforward. It consists of two 4-bit non-inverting, complementary bus transceivers. The device has two independent ports, each port providing eight pins (direction control and data lines). The device uses direction control pins in order to control the direction of data flow through the transceivers, with one port enabling data to flow from the “A” side of the device and the other port enabling data to flow from the “B” side of the device.The four data lines for each port can be individually configured as either input or output, depending on the direction control signal. When the direction control signal is “low”, the port is configured as an input port, and incoming data is stored in the respective flip-flops associated with the port. When the direction control signal is “high”, the port is configured as output, and any changes to the data lines are then driven out to the pins connected to the port.The 74FCT2244CTSOG utilizes a CMOS process technology, which provides low-power operation and improved noise immunity. The device also provides bus-hold and bus-tie capabilities. The bus-hold circuit provides an active pull-up current when the port is configured as an input, ensuring that the stored data is not stored in the input port will remain valid even when held in an unknown state for long periods of time. The bus-tie circuitry allows multiple devices to be tied together using a single shared line.In summary, the 74FCT2244CTSOG is an ideal device for applications that require fast data transfer and logic-level and memory-level translation between digital buses. Its low power consumption, high-speed operation and improved noise immunity make it a valuable solution for many different applications.

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