Parallel F-RAM Memory FM22L16 - Ramtron - #1

• 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

• JEDEC 256Kx16 SRAM Pinout

• 55 ns Access Time, 110 ns Cycle Time

• Low V_DD Monitor Protects Memory against Inadvertent Writes

• Software Programmable Block Write Protect

• No Battery Concerns

• Monolithic Reliability

• True Surface Mount Solution, No Rework Steps

• Superior for Moisture, Shock, and Vibration

• 2.7V - 3.6V Power Supply

• Low Current Mode (5uA) using ZZ pin

• 18 mA Active Current

• Industrial Temperature -40° C to +85° C

• 44-pin "Green"/RoHS TSOP-II package

array is divided into 8 uniform blocks, each of which can be individually write protected.

The device is available in a 400 mil 44-pin TSOP-II surface mount package. Device specifications are guaranteed over industrial temperature range -40°C to +85°C.

The FM22L16 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 FM22L16 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 FM22L16 ideal for nonvolatile memory applications requiring frequent or rapid writes in the form of an SRAM.

The FM22L16 includes a low voltage monitor that blocks access to the memory array when V_DD drops below a critical threshold. The memory is protected against an inadvertent access and data corruption under this condition. The device also features software-controlled write protection. The memory

This is a product that has fixed target specifications but are subject Ramtron International Corporation

to change pending characterization results. 1850 Ramtron Drive, Colorado Springs, CO 80921

(800) 545-FRAM, (719) 481-7000

Rev. 1.2 http ://www.ramtron. com

Dec. 2007 Page 1 of 14