Ramtrom's FM22LD16 FBGA package option for 4-megabit parallel nonvolatile F-RAM memory
Ramtron has announced the availability of its 4-megabit (Mb) F-RAM memory in a streamlined FBGA package. The FM22LD16 is a 4Mb, 3-volt, parallel nonvolatile RAM in a 48-pin ball grid array (FBGA) package that features fast access, virtually unlimited read/write cycles and low power consumption. Pin-compatible with asynchronous static RAM (SRAM), the FM22LD16 targets industrial control systems such as robotics, network and data storage applications, multi-function printers, auto navigation systems and a host of other SRAM-based system designs. Ramtron’s 4Mb parallel F-RAM is also available in a 44-pin thin small outline plastic (TSOP) package.“T
The FM22LD16 is organized as a 256K x 16 nonvolatile memory, accessed with an industry standard parallel interface. Access time is 55ns and cycle time is 110ns. The device reads and writes at bus speed for NoDelay™ writes with endurance of at least 1E14 (100-trillion) writes and 10-year data retention.
This 4Mb FRAM is a drop-in replacement for standard asynchronous SRAMs, but far superior as it does not require a battery for data backup and is inherently more reliable due to its monolithic form. The FM22LD16 is a true surface-mount solution, requiring no rework steps for battery attachment and, unlike battery-backed SRAM, is highly resistant to moisture, shock and vibration.
With a convenient interface to current high-performance microprocessors, the FM22LD16 features a high-speed page mode that enables 4-byte burst read/write operations at up to 40MHz, a bus speed significantly higher than other nonvolatile memory. The device boasts a lower operating current than similar density nonvolatile memories, drawing 8 milliamps for reads/writes and a standby current of 90 microamps. It operates from 2.7 to 3.6 volts over the industrial temperature range (- 40°C à +85°C).