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SD/SDIO and MMC 6PDT 2 Port Multiplexer
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General 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.
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Features
- On Resistance Typically 4W, VDDH=2.7V
- Ftoggle: > 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 (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
- 24-Lead MLP (3.5 x 4.5mm) and UMLP Packages
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Applications
- Cell Phone, PDA, Digital Camera, Portable GPS
- LCD Monitor, Home Theater PC/TV, All-in-One Printer
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