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-mΩ 5V V
CC
Switch;
130 mΩ 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°C to +85°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
GMT [ GLOBAL MIXED-MODE TECHNOLOGY INC ]
