G570

Fully Integrated V_CC and V_pp Switching for Dual Slot PC Card^TM  Interface

3-Lead Serial Interface Compatible With  CardBus^TM  Controllers

3.3V Low Voltage Mode

Meets PC Card Standards

RESET for System Initialization of PC Cards

12V Supply Can Be Disabled Except During  12V Flash Programming

Short Circuit and Thermal Protection

28 Pin and 30 Pin SSOP 

Compatible With 3.3V, 5V and 12V PC Cards

Low RDS(on) (225-m 5V VCC Switch; 200 m  3.3V VCC Switch)

Break-Before-Make Switching Internal power-On Reset

Notebook PC

Electronic Dictionary

Personal Digital Assistance

Digital still Camera

Input voltage range for card power:
  V_I(3.3V)...................................................................-0.3V to 7V
  V_I(5V)....................................................................-0.3V to 7V
  V_I(12V) ............................................................ -0.3V to 14V
Logic input voltage..............................................................-0.3V to 7V

Output current (each card):
 I_{O (xVCC)}...............................................internally limited
 I_O(xVPP).................................................................... internally limited
Operating virtual junction temperature range, T_J  ...-40°C to 150°C
Operating free-air temperature range, T_A .................-40°C to 85°C
Storage temperature range, T_STG............................-55°C to 150°C

The G570 PC Card power-interface switch provides an integrated power-management solution for two PC Cards. All of the discrete power MOSFETs, a logic section, current limiting, and thermal protection for PC Card control are combined on a single integrated cir-cuit (IC). The circuit allows the distribution of 3.3V, 5V, and/or 12V card power by means of the Serial inter-face. The current-limiting feature of G570 eliminates the need for fuses, which reduces component count and im-proves reliability. 

The G570 features a 3.3V low voltage mode that allows for 3.3V switching without the need for 5V supply. This facilitates low power system designs such as sleep mode and pager mode where only 3.3V is available. The G570 incorporates a reset function, selectable by one of two inputs, to help alleviate system errors. The reset function enables PC card initialization concurrent with host platform initialization, allowing a system reset. Reset is accomplished by grounding the VCC and VPP (flash-memory programming voltage) outputs, which discharges residual card voltage. 

End equipment for the G570 includes notebook com-puters, desktop computers, personal digital assistants (PDAs), digital cameras and bar-code scanners.