This part is a kind of semiconductor called 74LVX4245MTC.
Function of this product has 8-Bit Dual Supply Translating Transceiver with 3-STATE Outputs.
Manufacturers : Fairchild Semiconductor
Image and pinout :

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74LVX4245 8-Bit Dual Supply Translating Transceiver with 3-STATE Outputs January 1993 Revised July 1999 74LVX4245 8-Bit Dual Supply Translating Transceiver with 3-STATE Outputs General Description The LVX4245 is a dual-supply, 8-bit translating transceiver that is designed to interface between a 5V bus and a 3V bus in a mixed 3V/5V supply environment. The Transmit/ Receive (T/R) input determines the direction of data flow. Transmit (active-HIGH) enables data from A Ports to B Ports; Receive (active-LOW) enables data from B Ports to A Ports. The Output Enable input, when HIGH, disables both A and B Ports by placing them in a high impedance condition. The A Port interfaces with the 5V bus; the B Port interfaces with the 3V bus. The LVX4245 is suitable for mixed voltage applications such as [ ... ]
74LVX4245MTC PDF Datasheet Download
