PI74FCT3244QEX

Series:	74FCT
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
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:	24mA, 24mA
Voltage - Supply:	2.7 V ~ 3.6 V
Operating Temperature:	-40°C ~ 85°C (TA)
Mounting Type:	Surface Mount
Package / Case:	20-SSOP (0.154", 3.90mm Width)
Supplier Device Package:	20-QSOP
Base Part Number:	74FCT3244

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PI74FCT3244QEX application field and working principle

The PI74FCT3244QEX is an advanced high-speed, low-delay octal bus transceiver designed to provide simultaneous bi-directional data transfer among eight-bit buses. This device is designed to comply with JEDEC standard 2.5V-Preliminary Byte Controlled Transceiver Specification (JESD8-2b), which defines the operating considerations and waveform timing for low-voltage, fast-edge bus buffers.

Application Field

The PI74FCT3244QEX octal bus transceiver is suited for many applications where high-speed performance is required, such as network switching, HDMI receivers, and Mobile High Definition Link (MHL) for mobile phones and other multimedia applications. The PI74FCT3244QEX is a perfect choice for low-voltage, low-power, and low-skew applications that require a fully asynchronous, ultra-low-skew bus transceiver.The PI74FCT3244QEX is designed to reduce latency and provide improved timing accuracy. The eight separate bi-directional buffered connections are used to provide simultaneous data transfer along eight-bit buses. The device is capable of transferring data at data rates of up to 20Mbps. It also enables simultaneous bi-directional data transfers within a single device by using two full-duplex channels. Moreover, the PI74FCT3244QEX has one part per line write enable, allowing for greater flexibility in addressing and data communication. The device also supports many useful features such as programmable slew rates and hysteresis, programmable drive strength, and adjustable input and output impedance. The device also supports three different power modes: active, power-down, and standby.

Working Principle

The PI74FCT3244QEX octal bus transceiver is designed to transfer data between two separate eight-bit buses. It works by using two full duplex channels. Channel A transmits data from bus A to bus B and channel B transmits data from bus B to bus A. The make-before-break design eliminates runt pulses when multiple devices are connected. The PI74FCT3244QEX has four primary control pins: A_BEP (Bus-A/Bus-B Enable Input), A_DIR (Bus-A Data Direction Control Input), B_DIR (Bus-B Data Direction Control Input), and CE (Output Enable Control Input).A_BEP is the primary enable control for the device. When set to a "high" level, both channels are enabled and data can be transferred between the two buses. When A_BEP is set to "low," both channels are disabled and no data is transferred.The A_DIR and B_DIR pins are used to control the direction of data flow. When a pin is set to "high," data is transferred from the respective bus to the opposite bus. When the pin is set to "low," data is transferred from the opposite bus to the respective bus. The CE pin is used to enable or disable the outputs of the device. When set to "high," the outputs are enabled and the data on the respective buses is transferred. When the pin is set to "low," the outputs are disabled and no data is transferred. The PI74FCT3244QEX has a built-in reset feature that holds both channels in the high-impedance state and disables the outputs when the device starts up. The device also offers programmable slew rates and adjustable input and output impedances for improved performance. Overall, the PI74FCT3244QEX octal bus transceiver is suitable for many high-speed applications that require simultaneous bi-directional data transfer including network switching, HDMI receivers, and MHL for mobile phones and other multimedia applications. It is designed to provide high performance, low latency, and improved timing accuracy while also offering an array of features such as programmable slew rate and adjustable input and output impedance.

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