FSSD07_12 Datasheet, PDF (1/14 Pages) Fairchild Semiconductor – 1-Bit / 4-Bit SD/SDIO and MMC Dual-Host Multiplexer

March 2012
FSSD07
1-Bit / 4-Bit SD/SDIO and MMC Dual-Host Multiplexer
Features
 On Resistance: 5Ω Typical, V_DDC=2.7V
 f_toggle: >75MHz
 Low On Capacitance: 6pF Typical
 Low Power Consumption: 2µA Maximum
 Supports Secure Digital (SD), Secure Digital I/O
(SDIO), and Multimedia Card (MMC) Specifications
 Supports 1-Bit / 4-Bit Host Controllers (V_DDH1/H2=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_DDC=1.65 to 3.6V, V_DDH1/H2=1.65 to 3.6V
 24-Lead MLP and UMLP Packages
Applications
 Cell Phone, PDA, Digital Camera, Portable GPS, and
Notebook Computer
 LCD Monitor, TV, and Set-Top Box
Description
The FSSD07 is a 2:1 multiplexer that allows dual Secure
Digital (SD), Secure Digital I/O (SDIO), and Multimedia
Card (MMC) host controllers to share a common
peripheral. The host controllers can be equal to, greater
than, or less than peripheral card supply with minimal
power consumption. This configuration enables dual
host CMD, CLK, and D[3:0] signals to be multiplexed to
a common peripheral.
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 is a uni-directional buffer.
Typical applications involve switching in portables and
consumer applications: cell phones, digital cameras,
home theater monitors, set-top boxes, and notebooks.
Related Resources
 FSSD07 Evaluation Board
 Evaluation Board Users Guide
 For samples, questions, or board requests; please
contact [e-mail]
Figure 1. Analog Symbol Diagram
Ordering Information
Part
Number
FSSD07BQX
FSSD07UMX
Top
Mark
FSSD07
JK
Operating
Temperature Range
Package Description
-40°C to +85°C
24-Lead Molded Leadless Package (MLP), JEDEC
MO-220, 3.5 x 4.5mm
-40°C to +85°C
24-Lead Ultra-thin Molded Leadless Package
(UMLP), 0.4mm pitch
Packing
Method
Tape &
Reel
Tape &
Reel
© 2007 Fairchild Semiconductor Corporation
FSSD07 Rev. 1.0.2
www.fairchildsemi.com