MIC2557 Datasheet | Micrel Semiconductor

Micrel PCMCIA Card Socket VPP Switching Matrix General Description The MIC2557 switches the four voltages required by PCMCIA (Personal puter 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 120m A. 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 less than 1µA. The MIC2557 is available in an 8-pin SOIC and an 8-pin plastic DIP. Features - - - - - - - - - - plete PCMCIA V Switch Matrix in a Single IC PP No External ponents Required Digital Selection of 0V, VCC, VPP, or High Imped- ance Output No VPP OUT Overshoot or Switching Transients Break-Before-Make Switching Low Power Consumption 120m A V (12V) Output Current PP Optional Active Source Clamp for Zero Volt Condition 3.3V or 5V Supply Operation 8-Pin SOIC Package Applications - - - PCMCIA V Ordering Information Part Number MIC2557BM MIC2557BM T&R Temperature Range - 40°C to +85°C - 40°C to +85°C Package 8-pin SOIC 8-SOIC Tape & Reel- Pin Voltage Switch Power Supply Management Power Analog Switch - 2,500 Parts per reel. Typical Application VCC +3.3V or +5V VPP IN +12V VDD +5V Pin Configuration VPP IN VPP OUT +VCC 0.1µF 8 2 7 MIC2557 3 6 4 5 VDD Hi-Z/Low EN0 EN1 Hi-Z/ Low Control EN0 EN1 VPP(n) OUT 0.1µF 1µF 1µF 2 7 MIC2557 3 6 4...