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MC74LVXC3245DWRG bảng dữ liệu(PDF) 6 Page - ON Semiconductor |
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MC74LVXC3245DWRG bảng dữ liệu(HTML) 6 Page - ON Semiconductor |
6 / 9 page MC74LVXC3245 http://onsemi.com 6 Figure 3. Block Diagram SLOT 0 LVXC3245 LVXC3245 SLOT 1 LVXC3245 LVXC3245 SLOT 0 SLOT 1 VCCB VCCA OPTIONAL 5 V VCC 3 V VCC POWER SWITCHES PCMCIA 2.0 JEIDA 4.1 COMPATIBLE CONTROLLER SD(0:15) SD(0:15) Configurable I/O Application for PCMCIA Cards The 74LVXC3245 is a dual−supply device well suited for PCMCIA configurable I/O applications. The LVXC3245 consumes less than 1mW of quiescent power in all modes of operation, making it ideal for low power notebook designs. The LVXC3245 meets all PCMCIA I/O voltage requirements at 5.0 V and 3.3 V operation. By tying the VCCB pin to the card voltage supply, the PCMCIA card will always have rail−to−rail output swings, maximizing the reliability of the interface. The VCCA pin must always be tied to a 3.3 V power supply. This voltage connection provides internal references needed to account for variations in VCCB. When connected as in the figure above, the LVXC3245 meets all the voltage and current requirements of the ISA bus standard (IEEE P996). |
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