G574 Datasheet, PDF (1/14 Pages) Global Mixed-mode Technology Inc – Dual-Slot PCMCIA/CardBus Power Controller

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)
Application
„Notebook PC
„Electronic Dictionary
„POS
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 section, cur-
rent limiting, and thermal protection for PC Card control
are combined on a single integrated circuit (IC). The cir-
cuit 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 re-
duces component count and improves reliability.
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.
Ordering Information
PART NUMBER TEMP. RANGE
G574SA
-40°C to +85°C
PACKAGE
30 SSOP
Pin Configuration
5V 1
5V ²
DATA 3
CLOCK 4
LATCH 5
RESET 6
12V 7
AVPP ⁸
AVCC ⁹
AVCC 10
AVCC ¹¹
GND 12
NC 13
RESET 14
3.3V 15
G574
30Pin SSOP
30 5V
29 MODE
28 NC
27 NC
26 NC
25 NC
24 12V
23 BVPP
22 BVCC
21 BVCC
20 BVCC
19 STBY
18 OC
17 3.3V
16 3.3V
Ver: 1.0
Jan 23, 2003
TEL: [phone]
http://www.gmt.com.tw
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