1
Features
• MultiMediaCard (MMC) Form Factor
• Single 2.7V to 3.6V Supply
• 20 MHz Max Clock Frequency
• Serial Peripheral Interface (SPI) Compatible
• Low Power Dissipation
– 4 mA Active Read Current Typical
– 2 µA CMOS Standby Current Typical
• Industrial Temperature Range
Description
The AT45DCB008, AT45DCB004 and AT45DCB002 are 2.7-volt only SPI compatible
serial interface DataFlash
®
Cards. They are offered in 8-megabyte (64-Mbit), 4-mega-
byte (32-Mbit) and 2-megabyte (16-Mbit) densities. These 7-pin cards are form factor
compatible to the MultiMediaCard standard leveraging on a wide range of low cost
connectors that are commercially available. Additionally, the DataFlash Card is pinout
compatible to the SPI version of the MMC card.
The small form factor and simple interface make the DataFlash Card ideal for a wide
variety of data- and program code-storage applications where a removable storage
medium is required. Applications range from voice/audio, text or image storage to soft-
ware applications, system upgrades and software patches.
For detailed device specifications, please refer to the corresponding DataFlash
datasheets:
• AT45DCB008 reference AT45DB642
• AT45DCB004 reference AT45DB321B
• AT45DCB002 reference AT45DB161B
Pin Configuration
Pin # Pin Name Function
DataFlash Card
1CS Chip Select
Top View
2 SI Serial Input
3 GND Ground
4 VCC Supply
5 SCK Serial Clock
6 NC No Connect
7 SO Serial Output
7654321
8-megabyte,
4-megabyte,
and 2-megabyte
2.7-volt Only
DataFlash
®
Cards
AT45DCB008
AT45DCB004
AT45DCB002
Rev. 3257A–11/01
