FM24C04A_05 RAMTRON [Ramtron International Corporation], FM24C04A_05 Datasheet - Page 2

• Manufacturer Part Number: FM24C04A_05
• Description: 4Kb FRAM Serial Memory
• Manufacturer: RAMTRON [Ramtron International Corporation]

Pin Description
Rev. 3.0
Mar. 2005
Pin Name
A1-A2
SDA
SCL
WP
NC
VDD
VSS
SDA
SCL
WP
A1
A2
Supply
Supply
Input
Input
Input
I/O
I/O
-
`
Pin Description
Address 1-2: The address pins set the device select address. The device address value
in the 2-wire slave address must match the setting of these two pins. These pins are
internally pulled down.
Serial Data/Address: This is a bi-directional pin used to shift serial data and addresses
for the two-wire interface. It employs an open-drain output and is intended to be wire-
OR’d with other devices on the two-wire bus. The input buffer incorporates a Schmitt
trigger for noise immunity and the output driver includes slope control for falling
edges. A pull-up resistor is required.
Serial Clock: The serial clock input for the two-wire interface. Data is clocked out of
the device on the SCL falling edge, and clocked in on the SCL rising edge. The SCL
input also incorporates a Schmitt trigger input for improved noise immunity.
Write Protect: When WP is high the entire array is write-protected. When WP is low,
all addresses may be written. This pin is internally pulled down.
No connect
Supply Voltage: 5V
Ground
Serial to Parallel
Counter
Control Logic
Converter
Figure 1. Block Diagram
Address
Latch
FRAM Array
Data Latch
128 x 32
8
FM24C04A
2 of 12