Data Sheet

© 2007 Fairchild Semiconductor Corporation www.fairchildsemi.com
FSSD07 Rev. 1.0.2 3
FSSD07 — 1-Bit / 4-Bit SD/SDIO and MMC Dual-Host Multiplexer
Typical Application
Figure 4. Typical Application Diagram
CMD, DAT[3:0]
5
1.65V to 3.6V
Processor #1
VDDC
GND
OE
S
FSSD07
CLK
1.65V to 3.6V
WiFi,
Bluetooth,
MMC or SD
Peripheral
VDDH1
5
1CMD, 1DAT[3:0]
1CLK
R
CMD
, R
DAT[3:0]
VDDH2
5
2CMD, 2DAT[3:0]
2CLK
Secure Data/
Multi Media Card
Dual Host Selector
SD Card
R
1CMD, 2CMD
= 10k to 100k ohm
R
1DAT[3:0]
,
2DAT[3:0]
= 10k to 100k ohm
MMC Card
R
1CMD, 2CMD
= 4.7k to 100k ohm
R
1DAT[3:0], 2DAT[3:0]
= 50k to 100k ohm
1.65V to 3.6V
Processor #2
CMD, DAT[3:0]
5
1.65V to 3.6V
Processor #1
VDDC
GND
OE
S
FSSD07
CLK
1.65V to 3.6V
WiFi,
Bluetooth,
MMC or SD
Peripheral
VDDH1
5
1CMD, 1DAT[3:0]
1CLK
R
CMD
, R
DAT[3:0]
VDDH2
5
2CMD, 2DAT[3:0]
2CLK
Secure Data/
Multi Media Card
Dual Host Selector
SD Card
R
1CMD, 2CMD
= 10k to 100k ohm
R
1DAT[3:0]
,
2DAT[3:0]
= 10k to 100k ohm
MMC Card
R
1CMD, 2CMD
= 4.7k to 100k ohm
R
1DAT[3:0], 2DAT[3:0]
= 50k to 100k ohm
1.65V to 3.6V
Processor #2