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Global Mixed-mode Technology Inc.

G574

Dual-Slot PCMCIA/CardBus Power Controller

Features

Backward Compatible with 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

30 Pin SSOP

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

Low R

DS(on)

(180-m惟 5V V

CC

Switch;

130 m惟 3.3V V

CC

Switch)

Break-Before-Make Switching

Internal power-On Reset

Standby mode: 60mA current limit (TYP)

Description

The G574 PC Card power-interface switch provides an

integrated power-management solution for two PC

Cards. All of the discrete power MOSFETs, a logic sec-

tion, current limiting, and thermal protection for PC Card

control are combined on a single integrated circuit (IC).

The circuit allows the distribution of 3.3V, 5V, and/or

12V card power by means of the Serial interface. The

current-limiting feature eliminates the need for fuses,

which reduces component count and improves reliabil-

ity.

The G574 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 G574 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 V

CC

and V

PP

(flash-memory programming voltage) outputs, which

discharges residual card voltage.

This device also has the ability to program the xVpp

outputs independent of the xVCC outputs. A standby

mode that changes all output-current limits to 50mA

(typical) has been incorporated.

End equipment for the G574 includes notebook com-

puters, desktop computers, personal digital assistants

(PDAs), digital cameras and bar-code scanners

.

The G574 is backward-compatible with the G570.

Application

Notebook PC

Electronic Dictionary

POS

Ordering Information

ORDER

NUMBER

G574SA

ORDER NUMBER

(Pb free)

G574SAf

TEMP.

RANGE

-40擄C to +85擄C

PACKAGE

SSOP-30

Pin Configuration

G574

5V

5V

DATA

CLOCK

LATCH

RESET

12V

AVPP

AVCC

AVCC

AVCC

GND

NC

RESET

3.3V

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

30

29

28

27

26

25

24

23

22

21

20

19

18

17

16

5V

MODE

NC

NC

NC

NC

12V

BVPP

BVCC

BVCC

BVCC

STBY

OC

3.3V

3.3V

SSOP-30

Ver: 1.2

Jul 28, 2006

TEL: 886-3-5788833

http://www.gmt.com.tw

1

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