FM1608
64Kb Bytewide FRAM Memory
Features
SRAM & EEPROM Compatible
64K bit Ferroelectric Nonvolatile RAM
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JEDEC 8Kx8 SRAM & EEPROM pinout
120 ns access time
180 ns cycle time
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Organized as 8,192 x 8 bits
High endurance 10 Billion (1010) read/writes
10 year data retention at 85° C
NoDelay™ write
Equal access & cycle time for reads and writes
Advanced high-reliability ferroelectric process
Low Power Operation
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15 mA active current
20 mA standby current
Superior to BBSRAM Modules
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No battery concerns
Monolithic reliability
True surface mount solution, no rework steps
Superior for moisture, shock, and vibration
Resistant to negative voltage undershoots
Industry Standard Configuration
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Industrial temperature -40° C to +85° C
28-pin SOP or DIP
Description
Pin Configuration
The FM1608 is a 64-kilobit nonvolatile memory
employing an advanced ferroelectric process. A
ferroelectric random access memory or FRAM is
nonvolatile but operates in other respects as a RAM.
It provides data retention for 10 years while
eliminating the reliability concerns, functional
disadvantages and system design complexities of
battery-backed SRAM. Its fast write and high write
endurance make it superior to other types of
nonvolatile memory.
NC
A12
A7
VDD
WE
NC
A6
A8
A5
A9
A4
A11
OE
A3
A2
A10
CE
In-system operation of the FM1608 is very similar to
other RAM based devices. Memory read- and write-
cycles require equal times. The FRAM memory,
however, is nonvolatile due to its unique ferroelectric
memory process. Unlike BBSRAM, the FM1608 is a
truly monolithic nonvolatile memory. It provides the
same functional benefits of a fast write without the
serious disadvantages associated with modules and
batteries or hybrid memory solutions.
A1
A0
DQ7
DQ6
DQ5
DQ4
DQ3
DQ0
DQ1
DQ2
VSS
These capabilities make the FM1608 ideal for
nonvolatile memory applications requiring frequent or
Ordering Information
120 ns access, 28-pin plastic DIP
120 ns access, 28-pin SOP
rapid writes in
a bytewide environment. The
FM1608-120-P
FM1608-120-S
availability of a true surface-mount package improves
the manufacturability of new designs, while the DIP
package facilitates simple design retrofits. The
FM1608 offers guaranteed operation over an
industrial temperature range of -40°C to +85°C.
This data sheet contains design specifications for product development.
These specifications may change in any manner without notice
Ramtron International Corporation
1850 Ramtron Drive, Colorado Springs, CO 80921
(800) 545-FRAM, (719) 481-7000, Fax (719) 481-7058
www.ramtron.com
28 July 2000
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