50
Portable Audio
CompactFlash™ Interface Transceiver
SN74LV4320A
Get samples and datasheets at:
www.ti.com/sc/device/SN74LV4320A
MMC, SD, Memory Stick™, SmartMedia™ and
xD-Picture Card™ Transceiver
SN74AVCA406, SN74AVCA406L
Get samples, datasheets and app reports at:
www.ti.com/sc/device/SN74AVCA406
or
www.ti.com/sc/device/SN74AVCA406L
The SN74AVCA406 is a transceiver for interfacing microprocessors
with MultiMediaCard (MMC), Secure Digital™ (SD) cards, Memory
Stick compliant products, SmartMedia cards, or xD-Picture Card. It
integrates high ESD protection, which eliminates the need for external
ESD diodes.
Key Features
• Transceiver for interface with MultiMediaCard (MMC), Secure
Digital (SD), Memory Stick (MS) compliant products, SmartMedia
and xD-Picture Card
• Configurable I/O switching levels with dual-supply pins operating
over full 1.4- to 3.6-V power-supply range
• A ports are placed in high-impedance state when card-side supply
voltage is switched off
• ESD protection for card-side pins exceeds ±15-kV air gap discharge,
±8-kV contact discharge
Applications
• Handsets
• PDAs
• Handheld scanners
• Digital still cameras
• Set-top boxes
This CompactFlash (CF) interface chip is designed to provide a single-
chip solution for CF card interfaces. Separate V
CC
rails for the system
bus side and the CF connector bus side allow voltage-level shifting.
This is helpful for interfacing between a core chipset, which may
operate from 3.3 V down to 1.65 V, and CF cards with 3.3-V or 5-V
supply voltages.
Key Features
• Level translation supports both 3.3- and 5-V CompactFlash cards
• High degree of integration
• Schmidt-trigger inputs for CompactFlash control signals
• I
off
and /MASTER_EN (shutdown) pin
• Internal decode logic for direction control (DIR)
• Robust ESD protection (+8-kV HBM) on card pins
Applications
• PDAs
• Handheld scanners
• Set-top boxes
• Network equipment
V
CCS
SN74LV4320A
V
CC_CF
Comparison of SN74AVCA406 and SN74AVCA406L
Cards supported
SN74AVCA406
SD/MMC/MS
(single or dual cards),
xD-Picture Card
48-ball BGA, 4 x 4 mm
15-kV air gap discharge,
8-kV contact discharge
0 to V
CCB
No
SN74AVCA406L
SD, MMC, MS
Data 16
Control 8
1.8-V to 3.3-V
Micro-
processor Address 11
Status 6
Level
Shifter
Data 16
Control
8
3.3-V or
5-V Card
Address 11
Status 6
Packages
Card-side ESD protection
V
CCA
range
I
OFF
feature (for partial-
power-down applications)
1.8 V
20-ball BGA (3 x 2.5 mm),
24-ball BGA (3 x 3 mm)
8-kV human-body model
(HBM)
0 to 3.6 V
Yes
SN74LV4320A typical application diagram.
3V
Microprocessor
MMC_CLKIN
MMC_CLK
MMC_CMD
MMC_DAT0
MMC_DAT[3:1]
MMC_DAT[3:0]_DIR
MMC_CMD_DIR
SN74AVCA406/L
MMC, SD,
SDIO
or
MS Card
Memory card interface with the SN74AVCA406.
Audio Solutions Guide
Texas Instruments 1Q 2006
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