Motor de Búsqueda de Datasheet de Componentes Electrónicos
  Spanish  ▼
ALLDATASHEET.ES

X  

FM1608 Datasheet(PDF) 5 Page - Ramtron International Corporation

No. de pieza FM1608
Descripción Electrónicos  64Kb Bytewide FRAM Memory
Download  12 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Fabricante Electrónico  RAMTRON [Ramtron International Corporation]
Página de inicio  http://www.ramtron.com
Logo RAMTRON - Ramtron International Corporation

FM1608 Datasheet(HTML) 5 Page - Ramtron International Corporation

  FM1608 Datasheet HTML 1Page - Ramtron International Corporation FM1608 Datasheet HTML 2Page - Ramtron International Corporation FM1608 Datasheet HTML 3Page - Ramtron International Corporation FM1608 Datasheet HTML 4Page - Ramtron International Corporation FM1608 Datasheet HTML 5Page - Ramtron International Corporation FM1608 Datasheet HTML 6Page - Ramtron International Corporation FM1608 Datasheet HTML 7Page - Ramtron International Corporation FM1608 Datasheet HTML 8Page - Ramtron International Corporation FM1608 Datasheet HTML 9Page - Ramtron International Corporation Next Button
Zoom Inzoom in Zoom Outzoom out
 5 / 12 page
background image
Ramtron
FM1608
28 July 2000
5/12
Figure 3. Row and Column Organization
Applications
As the first truly nonvolatile RAM, the FM1608 fits
into many diverse applications. Clearly, its monolithic
nature and high performance make it superior to
battery-backed SRAM in most every application. This
applications guide is intended to facilitate the
transition from BBSRAM to FRAM. It is divided into
two parts. First is a treatment of the advantages of
FRAM
memory
compared
with
battery-backed
SRAM. Second is a design guide, which highlights
the simple design considerations that should be
reviewed in both retrofit and new design situations.
FRAM Advantages
Although battery -backed SRAM is a mature and
established solution, it has numerous weaknesses.
These stem, directly or indirectly from the presence of
the battery. FRAM uses an inherently nonvolatile
storage mechanism that requires no battery. It
therefore eliminates these weaknesses. The major
considerations in upgrading to FRAM are as follows.
Construction Issues
1.
Cost
The
cost
of
both
the
component
and
the
manufacturing overhead of battery-backed SRAM is
high. FRAM, with its monolithic construction is
inherently a lower cost solution. In addition, there is
no
‘built-in’
rework
step
required
for
battery
attachment
when
using
surface
mount
parts.
Therefore assembly is streamlined and more cost
effective. In the case of DIP battery-backed modules,
the user is constrained to through-hole assembly
techniques and a board wash using no water.
2.
Humidity
A typical battery-backed SRAM module is qualified at
60º C, 90% Rh, no bias, and no pressure. This is
because
the
multi-component
assemblies
are
vulnerable to moisture, not to mention dirt. FRAM is
qualified using HAST – highly accelerated stress test.
This requires 120º C at 85% Rh, 24.4 psia at 5.5V bias.
3.
System reliability
Data integrity must be in question when using a
battery-backed
SRAM.
They
are
inherently
vulnerable to shock and vibration. If the battery
contact comes loose, data will be lost. In addition a
negative voltage, even a momentary undershoot, on
any pin of a battery -backed SRAM can cause data
loss. The negative voltage causes current to be drawn
directly from the battery. These momentary short
circuits can greatly weaken a battery and reduce its
capacity over time. In general, there is no way to
monitor
the
lost
battery
capacity.
Should
an
undershoot occur in a battery backed system during a
power down, data can be lost immediately.
4.
Space
Certain disadvantages of battery -backed, such as
susceptibility to shock, can be reduced by using the
old fashioned DIP module. However, this alternative
takes up board space, add height, and dictates
through-hole assembly. FRAM offers a true surface-
mount solution that uses 25% of the board space.
No multi-piece assemblies no connectors, and no
modules.
A
real
nonvolatile
RAM
is
finally
available!
Direct Battery Issues
5.
Field maintenance
Batteries, no matter how mature, are a built-in
maintenance problem. They eventually must be
replaced. Despite long life projections, it is impossible
to know if any individual battery will last considering
all of the factors that can degrade them.
6.
Environmental
Lithium
batteries
are
widely
regarded
as
an
environmental problem. They are a potential fire
hazard and proper disposal can be a burden. In
addition, shipping of lithium batteries may be
restricted.
7.
Style!
Backing up an SRAM with a battery is an old-
fashioned approach. In many cases, such modules are
the only through-hole component in sight. FRAM is
the latest memory technology and it is changing the
way systems are designed.
FRAM is nonvolatile and writes fast -- no battery
required!


Número de pieza similar - FM1608

Fabricante ElectrónicoNo. de piezaDatasheetDescripción Electrónicos
logo
Ramtron International C...
FM1608B RAMTRON-FM1608B Datasheet
94Kb / 11P
   64Kb Bytewide 5V F-RAM Memory
logo
Cypress Semiconductor
FM1608B CYPRESS-FM1608B Datasheet
342Kb / 14P
   64Kb Bytewide 5V F-RAM Memory
logo
Ramtron International C...
FM1608B-SG RAMTRON-FM1608B-SG Datasheet
94Kb / 11P
   64Kb Bytewide 5V F-RAM Memory
logo
Cypress Semiconductor
FM1608B-SG CYPRESS-FM1608B-SG Datasheet
342Kb / 14P
   64Kb Bytewide 5V F-RAM Memory
More results

Descripción similar - FM1608

Fabricante ElectrónicoNo. de piezaDatasheetDescripción Electrónicos
logo
List of Unclassifed Man...
FM1808 ETC-FM1808 Datasheet
89Kb / 12P
   256Kb Bytewide FRAM Memory
logo
Ramtron International C...
FM18L08 RAMTRON-FM18L08_07 Datasheet
126Kb / 13P
   256Kb Bytewide FRAM Memory
FM25640 RAMTRON-FM25640 Datasheet
131Kb / 14P
   64Kb FRAM Serial Memory
FM25640 RAMTRON-FM25640_05 Datasheet
187Kb / 13P
   64Kb FRAM Serial Memory
FM24C64 RAMTRON-FM24C64_05 Datasheet
98Kb / 12P
   64Kb FRAM Serial Memory
FM25640 RAMTRON-FM25640_07 Datasheet
138Kb / 13P
   64Kb FRAM Serial Memory
FM25CL64 RAMTRON-FM25CL64 Datasheet
131Kb / 13P
   64Kb FRAM Serial 3V Memory
logo
List of Unclassifed Man...
FM20L08 ETC1-FM20L08 Datasheet
130Kb / 14P
   1Mbit Bytewide FRAM Memory - Extended Temp
FM18L08 ETC-FM18L08 Datasheet
80Kb / 11P
   256Kb 2.7-3.6V Bytewide FRAM Memory
logo
Ramtron International C...
FM20L08 RAMTRON-FM20L08_07 Datasheet
152Kb / 14P
   1Mbit Bytewide FRAM Memory - Industrial Temp.
More results


Html Pages

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


Datasheet Descarga

Go To PDF Page


Enlace URL




Política de Privacidad
ALLDATASHEET.ES
¿ALLDATASHEET es útil para Ud.?  [ DONATE ] 

Todo acerca de Alldatasheet   |   Publicidad   |   Contáctenos   |   Política de Privacidad   |   Intercambio de Enlaces   |   Lista de Fabricantes
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
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com