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| MC74LVXC3245DTRG Datasheet, PDF (6/9 Pages) ON Semiconductor – Configurable Dual Supply Octal Transceiver | |||
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MC74LVXC3245
VCCA
VCCB
SD(0:15)
LVXC3245
PCMCIA 2.0
JEIDA 4.1
COMPATIBLE
CONTROLLER
POWER
SWITCHES
SLOT 0
SLOT 1
5V
3V
VCC
VCC
SD(0:15)
LVXC3245
LVXC3245
SLOT 0
SLOT 1
LVXC3245
Figure 3. Block Diagram
OPTIONAL
Configurable I/O Application for PCMCIA Cards
The 74LVXC3245 is a dualâsupply 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
railâtoârail 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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