FSSD06_12 Datasheet, PDF (1/14 Pages) Fairchild Semiconductor – SD/SDIO and MMC Two-Port Multiplexer

March 2012
FSSD06 — SD/SDIO and MMC Two-Port Multiplexer
Features
 On Resistance Typically 4Ω, V_DDH=2.7V
 f_toggle: > 120MHz
 Low On Capacitance: 9pF Typical
 Low Power Consumption: 1µA Maximum
 Conforms to Secure Digital (SD), Secure Digital I/O
(SDIO), and Multimedia Card (MMC) Specifications
 Supports 1-Bit / 4-Bit Host Controllers (V_DDH=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)
- V_DDH=1.65 to 3.6V, V_DDC1/C2=V_DDH to 3.6V
 24-Lead MLP (3.5 x 4.5mm) and UMLP Packages
Applications
 Cell Phone, PDA, Digital Camera, Portable GPS
 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.
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 DDC1
V DD C2
RPU
RP U
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
Package Description
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
© 2007 Fairchild Semiconductor Corporation
FSSD06 • Rev. 1.0.5
www.fairchildsemi.com