MIC2557 Micrel MIC2557 PCMCIA Card Socket VPP Switching Matrix General Description The MIC2557 switches the four voltages required by PCMCIA (Personal Computer Memory Card International Association) card VPP Pins.
The MIC2557 provides selectable 0V, 3.
3V, 5.
0V, or 12.
0V (± 5%) from the system power supply to VPP1 or VPP2.
Output voltage is selected by two digital inputs.
Output current ranges up to 120mA.
Four control states, VPP, VCC, high impedance, and active logic low are available.
An auxiliary control input determines whether the high impedance (open) state or low logic state is asserted.
In either quiescent mode or full operation, the device draws very little current, typically les...

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