FSSD06_08 Datasheet, PDF (1/14 Pages) Fairchild Semiconductor – SD/SDIO and MMC Two-Port Multiplexer

September 2008
FSSD06 — SD/SDIO and MMC Two-Port Multiplexer
Features
ƒ On Resistance Typically 4Ω, VDDH=2.7V
ƒ Ftoggle: > 120MHz
ƒ Low On Capacitance: 9pF Typical
ƒ Low Power Consumption: 1µA Maximum
ƒ Conforms to Secure Digital (SD), Secure Digital I/O
(SDIO), and Multimedia Card (MMC) Specifications
ƒ Supports 1-Bit / 4-Bit Host Controllers (VDDH=1.65V to
3.6V) Communicating with High-Voltage (2.7-3.6V)
and Dual-Voltage Cards (1.65-1.95V, 2.7-3.6V)
- VDDH=1.65 to 3.6V, VDDC1/C2=VDDH to 3.6V
ƒ 24-Lead MLP (3.5 x 4.5mm) and UMLP Packages
Applications
ƒ Cell Phone, PDA, Digital Camera, Portable GPS
ƒ LCD Monitor, Home Theater PC/TV, All-in-One
Printer
Description
The FSSD06 is a two-port multiplexer that allows
Secure Digital (SD), Secure Digital I/O (SDIO), and
Multimedia Card (MMC) host controllers to be expanded
out to multiple cards or peripherals. This configuration
enables the CMD, CLK, and D[3:0] signals to be
multiplexed to dual-card peripherals. It is optimized for
1-bit / 4-bit SD / MMC applications.
The architecture includes the necessary bi-directional
data and command transfer capability for single high-
voltage cards or dual-voltage supply cards. The clock
path for the FSSD06 is a uni-directional buffer with an
integrated pull-up for high-impedance mode.
Typical applications involve switching in portables and
consumer applications: cell phones, digital cameras,
home theater monitors, portable GPS units, and printers.
IMPORTANT NOTE:
For additional performance information, please contact
[e-mail].
Analog Symbol Diagram
VDDC1
VDDC2
VDDH
DAT[0:3], CMD
Control
5
/OE
S
5 _{1DAT[0:3], 1CMD}
5 _{2DAT[0:3], 2CMD}
V DD C1
V DD C 2
RP U
RPU
CLK
GND
Figure 1.
1CLK
2CLK
Analog Symbol Diagram
Ordering Information
Part
Number
Operating
Temperature
Range
FSSD06BQX -40°C to +85°C
FSSD06UMX -40°C to +85°C
Eco
Status
Package Description
Green
Green
24-Lead Molded Leadless Package (MLP), JEDEC
MO-220, 3.5 x 4.5mm
24-Lead Ultrathin Molded Leadless Package (UMLP)
Packing
Method
Tape & Reel
Tape & Reel
For Fairchild’s definition of “green” Eco Status, please visit: http://www.fairchildsemi.com/company/green/rohs_green.html.
© 2007 Fairchild Semiconductor Corporation
FSSD06 Rev. 1.0.3
www.fairchildsemi.com