I'm not familiar with the F-RAM products. I just use chips like the AT24C1024 when I need external ram.

Sorry, I can't comment on speeds and interfacing right now, I'm still too rusty (been out of the loop too long). But you might want to take a look at those, they are common and cheap.

I'm just throwing this out in case it actually is helpful to you.


Features
• Low-voltage Operation
– 2.7 (VCC = 2.7V to 5.5V)
• Internally Organized 131,072 x 8
• 2-wire Serial Interface
• Schmitt Triggers, Filtered Inputs for Noise Suppression
• Bi-directional Data Transfer Protocol
• 400 kHz (2.7V) and 1 MHz (5V) Clock Rate
• Write Protect Pin for Hardware and Software Data Protection
• 256-byte Page Write Mode (Partial Page Writes Allowed)
• Random and Sequential Read Modes
• Self-timed Write Cycle (5 ms Typical)
• High Reliability
– Endurance: 100,000 Write Cycles/Page
– Data Retention: 40 Years
• 8-lead PDIP, 8-lead EIAJ SOIC, 8-lead LAP and 8-ball dBGATM Packages
Description
The AT24C1024 provides 1,048,576 bits of serial electrically erasable and programmable
read only memory (EEPROM) organized as 131,072 words of 8 bits each. The
device’s cascadable feature allows up to 2 devices to share a common 2-wire bus.
The device is optimized for use in many industrial and commercial applications where
low-power and low-voltage operation are essential. The devices are available in
space-saving 8-lead PDIP, 8-lead EIAJ SOIC, 8-lead Leadless Array (LAP), and 8-ball
dBGA packages. In addition, the entire family is available in 2.7V (2.7V to 5.5V)
versions.