FSSD07 — 1-Bit / 4-Bit SD/SDIO and MMC Dual-Host Multiplexer
April 2009
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)
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.
-
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
Analog Symbol
IMPORTANT NOTE:
For additional performance information, please contact
analogswitch@fairchildsemi.com.
Figure 1. Analog Symbol Diagram
Ordering Information
Part
Number
Top
Mark
Operating
Temperature Range
-40°C to +85°C
-40°C to +85°C
Eco
Status
Green
Green
Package Description
24-Lead Molded Leadless Package (MLP),
JEDEC MO-220, 3.5 x 4.5mm
24-Lead Ultra-thin Molded Leadless Package
(UMLP), 0.4mm pitch
Packing
Method
Tape &
Reel
Tape &
Reel
FSSD07BQX FSSD07
FSSD07UMX
JK
For Fairchild’s definition of Eco Status, please visit:
http://www.fairchildsemi.com/company/green/rohs_green.html.
© 2007 Fairchild Semiconductor Corporation
FSSD07 Rev. 1.0.0
www.fairchildsemi.com
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