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FM22LD16 fiches techniques PDF

Ramtron - 4Mbit F-RAM Memory

Numéro de référence FM22LD16
Description 4Mbit F-RAM Memory
Fabricant Ramtron 
Logo Ramtron 





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FM22LD16 fiche technique
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Pre-Production
FM22LD16
4Mbit F-RAM Memory
Features
4Mbit Ferroelectric Nonvolatile RAM
Organized as 256Kx16
Configurable as 512Kx8 Using /UB, /LB
1014 Read/Write Cycles
NoDelay™ Writes
Page Mode Operation to 40MHz
Advanced High-Reliability Ferroelectric Process
SRAM Compatible
JEDEC 256Kx16 SRAM Pinout
55 ns Access Time, 110 ns Cycle Time
Advanced Features
Software Programmable Block Write Protect
Description
The FM22LD16 is a 256Kx16 nonvolatile memory
that reads and writes like a standard SRAM. A
ferroelectric random access memory or F-RAM is
nonvolatile, which means that data is retained after
power is removed. It provides data retention for over
10 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 the
F-RAM superior to other types of memory.
In-system operation of the FM22LD16 is very similar
to other RAM devices and can be used as a drop-in
replacement for standard SRAM. Read and write
cycles may be triggered by /CE or simply by
changing the address. The F-RAM memory is
nonvolatile due to its unique ferroelectric memory
process. These features make the FM22LD16 ideal
for nonvolatile memory applications requiring
frequent or rapid writes in the form of an SRAM.
The FM22LD16 includes a low voltage monitor that
blocks access to the memory array when VDD drops
below VDD min. The memory is protected against an
inadvertent access and data corruption under this
condition. The device also features software-
controlled write protection. The memory array is
divided into 8 uniform blocks, each of which can be
individually write protected.
Superior to Battery-backed SRAM Modules
No Battery Concerns
Monolithic Reliability
True Surface Mount Solution, No Rework Steps
Superior for Moisture, Shock, and Vibration
Low Power Operation
2.7V – 3.6V Power Supply
Low Standby Current (90µA typ.)
Low Active Current (8 mA typ.)
Industry Standard Configuration
Industrial Temperature -40° C to +85° C
48-ball “Green”/RoHS FBGA package
Pin compatible with FM21LD16 (2Mb) and
FM23MLD16 (8Mb)
The device is available in a 48-ball FBGA package.
Device specifications are guaranteed over industrial
temperature range –40°C to +85°C.
Pin Configuration
1 2 34 5 6
A /LB /OE A0 A1 A2 NC
B
DQ8 /UB
A3
A4 /CE DQ0
C
DQ9 DQ10 A5
A6 DQ1 DQ2
D VSS DQ11 A17 A7 DQ3 VDD
E VDD DQ12 NC A16 DQ4 VSS
F DQ14 DQ13 A14 A15 DQ5 DQ6
G DQ15 NC A12 A13 /WE DQ7
H NC A8 A9 A10 A11 NC
Top View (Ball Down)
Ordering Information
FM22LD16-55-BG 55 ns access, 48-ball
“Green”/RoHS FBGA
FM22LD16-55-BGTR 55 ns access, 48-ball
“Green”/RoHS FBGA,
Tape & Reel
This is a product in the pre-production phase of development. Device
characterization is complete and Ramtron does not expect to change the
specifications. Ramtron will issue a Product Change Notice if any
specification changes are made.
Rev. 2.0
Dec. 2009
Ramtron International Corporation
1850 Ramtron Drive, Colorado Springs, CO 80921
(800) 545-FRAM, (719) 481-7000
http://www.ramtron.com
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