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Numéro de référence | FM1808B | ||
Description | 256Kb Bytewide 5V F-RAM Memory | ||
Fabricant | Ramtron | ||
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Preliminary
FM1808B
256Kb Bytewide 5V F-RAM Memory
Features
256Kbit Ferroelectric Nonvolatile RAM
• Organized as 32,768 x 8 bits
• High Endurance 1 Trillion (1012) Read/Writes
• 38 year Data Retention (@ +75°C)
• NoDelay™ Writes
• Advanced High-Reliability Ferroelectric Process
Superior to BBSRAM Modules
• No Battery Concerns
• Monolithic Reliability
• True Surface Mount Solution, No Rework Steps
• Superior for Moisture, Shock, and Vibration
• Resistant to Negative Voltage Undershoots
SRAM & EEPROM Compatible
• JEDEC 32Kx8 SRAM & EEPROM pinout
• 70 ns Access Time
• 130 ns Cycle Time
Low Power Operation
• 15 mA Active Current
• 25 µA (typ.) Standby Current
Industry Standard Configuration
• Industrial Temperature -40°C to +85°C
• 28-pin “Green”/RoHS SOIC Package
Description
The FM1808B is a 256-kilobit nonvolatile memory
employing an advanced ferroelectric process. A
ferroelectric random access memory or F-RAM is
nonvolatile but operates in other respects as a RAM.
It provides data retention for 38 years while
eliminating the reliability concerns, functional
disadvantages and system design complexities of
battery-backed SRAM (BBSRAM). Fast write timing
and high write endurance make F-RAM superior to
other types of nonvolatile memory.
In-system operation of the FM1808B is very similar
to other RAM devices. Minimum read- and write-
cycle times are equal. The F-RAM memory, however,
is nonvolatile due to its unique ferroelectric memory
process. Unlike BBSRAM, the FM1808B is a truly
monolithic nonvolatile memory. It provides the same
functional benefits of a fast write without the
disadvantages associated with modules and batteries
or hybrid memory solutions.
These capabilities make the FM1808B ideal for
nonvolatile memory applications requiring frequent
or rapid writes in a bytewide environment. The
availability of a true surface-mount package improves
the manufacturability of new designs. Device
specifications are guaranteed over an industrial
temperature range of -40°C to +85°C.
Pin Configuration
A14
A12
A7
A6
A5
A4
A3
A2
A1
A0
DQ0
DQ1
DQ2
VSS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28 VDD
27 WE
26 A13
25 A8
24 A9
23 A11
22 OE
21 A10
20 CE
19 DQ7
18 DQ6
17 DQ5
16 DQ4
15 DQ3
Ordering Information
FM1808B-SG
28-pin “Green”/RoHS SOIC
This is a product that has fixed target specifications but are subject
to change pending characterization results.
Rev. 1.2
Mar. 2011
Ramtron International Corporation
1850 Ramtron Drive, Colorado Springs, CO 80921
(800) 545-FRAM, (719) 481-7000
http://www.ramtron.com
Page 1 of 11
Datasheet pdf - http://www.DataSheet4U.net/
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Pages | Pages 11 | ||
Télécharger | [ FM1808B ] |
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