This is a flash memory from Intel. Intel StrataFlash(R). It is a 64Mbit (8Mb).
You can find the marketing embellished specs here: http://www.intel.com/design/flcomp/datashts/290667.htm Or short cut to the data sheet: ftp://download.intel.com/design/flcomp/datashts/29066720.pdf
There are other variants of this memory (28F256J3, 28F128J3, 28F640J3, 28F320J3), these are of different sizes, from 4Mb to 32Mb.
I don't fully recall (nor can find the specs), but I think that this is the same flash chip that is inside of the Agenda VR3.
http://www.delorie.com/agenda/hw.html
These are the basic features (taken from the datasheet, this applies to: 28F256J3, 28F128J3, 28F640J3, 28F320J3):
Performance
110/115/120/150 ns Initial Access Speed
125 ns Initial Access Speed (256 Mbit density only)
25 ns Asynchronous Page mode Reads
30 ns Asynchronous Page mode Reads (256Mbit density only)
32-Byte Write Buffer
6.8 µs per byte effective programming time
Software
Program and Erase suspend support
Flash Data Integrator (FDI), Common Flash Interface (CFI) Compatible
Security
128-bit Protection Register
64-bit Unique Device Identifier
64-bit User Programmable OTP Cells
Absolute Protection with VPEN = GND
Individual Block Locking
Block Erase/Program Lockout during Power Transitions
Architecture
Multi-Level Cell Technology: High Density at Low Cost
High-Density Symmetrical 128-Kbyte Blocks
256 Mbit (256 Blocks) (0.18µm only)
128 Mbit (128 Blocks)
64 Mbit (64 Blocks)
32 Mbit (32 Blocks)
Quality and Reliability
Operating Temperature: -40 °C to +85 °C
100K Minimum Erase Cycles per Block
0.18 µm ETOX" VII Process (J3C)
0.25 µm ETOX" VI Process (J3A)
56-Lead TSOP Package
64-Ball Intel® Easy BGA Package
Lead-free packages available
48-Ball Intel® VF BGA Package (32 and 64 Mbit) (x16 only)
VCC = 2.7 V to 3.6 V
VCCQ = 2.7 V to 3.6 V
