Electronic Components Datasheet Search
  English  ▼

Delete All
ON OFF
ALLDATASHEET.NET


FM25040A-S Datasheet(HTML) 2 Page - Ramtron International Corporation

Part No. FM25040A-S
Description  4Kb FRAM Serial Memory
Download  13 Pages
Scroll/Zoom Zoom In 100% Zoom Out
Maker  RAMTRON [Ramtron International Corporation]
Homepage  http://www.ramtron.com
Logo 

FM25040A-S Datasheet(HTML) 2 Page - Ramtron International Corporation

 
 2 page
background image
FM25040A
Rev. 3.0
May 2006
Page 2 of
13
Instruction Decode
Clock Generator
Control Logic
Write Protect
Instruction Register
Address Register
Counter
128 x 32
FRAM Array
9
Data I/O Register
8
Nonvolatile Status
Register
2
WP
CS
HOLD
SCK
SO
SI
Figure 1. Block Diagram
Pin Descriptions
Pin Name
I/O
Description
/CS
Input
Chip Select. This active-low input activates the device. When high, the device enters low-
power standby mode, ignores other inputs, and all outputs are tri-stated. When low, the
device internally activates the SCK signal. A falling edge on /CS must occur prior to every
op-code.
SCK
Input
Serial Clock: All I/O activity is synchronized to the serial clock. Inputs are latched on the
rising edge and outputs occur on the falling edge. Since the device is static, the clock
frequency may be any value between 0 and 20 MHz and may be interrupted at any time.
/HOLD
Input
Hold: The /HOLD pin is used when the host CPU must interrupt a memory operation for
another task. When /HOLD is low, the current operation is suspended. The device ignores
any transition on SCK or /CS. All transitions on /HOLD must occur while SCK is low.
/WP
Input
Write Protect: This active-low pin prevents all write operations, including those to the
status register. If high, write access is determined by the other write protection features, as
controlled through the status register. A complete explanation of write protection is
provided on page 6.
SI
Input
Serial Input: All input data is driven to this pin. The pin is sampled on the rising edge of
SCK and is ignored at other times. It should always be driven to a valid logic level to meet
IDD specifications.
* SI may be connected to SO for a single pin data interface.
SO
Output
Serial Output: SO is the data output pin. It is driven actively during a read and remains tri-
state at all other times including when /HOLD is low. Data transitions are driven on the
falling edge of the serial clock.
* SO can be connected to SI for a single pin data interface since the part communicates in
half-duplex fashion.
VDD
Supply
Supply Voltage: 5V
VSS
Supply
Ground


Html Pages

1  2  3  4  5  6  7  8  9  10  11  12  13 


Datasheet Download



Related Electronics Part Number

Part NumberComponents DescriptionHtml ViewManufacturer
FM24C04A_054Kb FRAM Serial Memory 1 2 3 4 5 MoreRamtron International Corporation
FM24CL04_054Kb FRAM Serial Memory 1 2 3 4 5 MoreRamtron International Corporation
FM25CL04_054Kb FRAM Serial 3V Memory 1 2 3 4 5 MoreRamtron International Corporation
W25X101M-BIT 2M-BIT 4M-BIT AND 8M-BIT SERIAL FLASH MEMORY WITH 4KB SECTORS AND DUAL OUTPUT SPI 1 2 3 4 5 MoreWinbond
W25X10_071M-BIT 2M-BIT 4M-BIT AND 8M-BIT SERIAL FLASH MEMORY WITH 4KB SECTORS AND DUAL OUTPUT SPI 1 2 3 4 5 MoreWinbond
FM25CL64_0764Kb FRAM Serial 3V Memory 1 2 3 4 5 MoreRamtron International Corporation
FM24C16A_0516Kb FRAM Serial Memory 1 2 3 4 5 MoreRamtron International Corporation
FM24C64_0564Kb FRAM Serial Memory 1 2 3 4 5 MoreRamtron International Corporation
FM24CL6464Kb 2.7V-3.6V FRAM Serial Memory 1 2 3 4 5 MoreList of Unclassifed Manufacturers
FM24C256_05256Kb FRAM Serial Memory 1 2 3 4 5 MoreRamtron International Corporation

Link URL



Privacy Policy
ALLDATASHEET.NET
Does ALLDATASHEET help your business so far?  [ DONATE ]  

About Alldatasheet   |   Advertisement   |   Contact us   |   Privacy Policy   |   Bookmark   |   Link Exchange   |   Manufacturer List
All Rights Reserved© Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn