will result. In actuality the VCCB can be powered “slightly” before the VCCA without the current penalty, but this “setup time” is dependent on the power.
up ramp rate of the VCC pins. With a ramp rate of approximately 50mV/ns (50V/µs) a 25ns setup time was observed (VCCB
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LVX Data.
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www.DataSheet4U.com MOTOROLA SEMICONDUCTOR TECHNICAL DATA Dual Supply Octal Translating Transceiver with 3-State Outputs The 74LVX4245 is a 24–pin dual–supply, octal tran...
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with 3-State Outputs The 74LVX4245 is a 24–pin dual–supply, octal translating transceiver that is designed to interface between a 5V bus and a 3V bus in a mixed 3V/5V supply environment such as laptop computers using a 3.3V CPU and 5V LCD display. The A port interfaces with the 5V bus; the B port interfaces with the 3V bus. The Transmit/Receive (T/R) input determines the direction of data flow. Transmit (active–High) enables data from the A port to the B port. Receive (active–Low) enables data from the B port to the A port. The Output Enable (OE) input, when High, disables both A and B ports by placing them in 3–State.