XM28C040P Datasheet, PDF (1/4 Pages) Xicor Inc. – High Density 5 Volt Byte Alterable Nonvolatile Memory Array

4 Megabit Puma Module
XM28C040P
512K x 8 Bit
High Density 5 Volt Byte Alterable Nonvolatile Memory Array
FEATURES
• High Density Memory Module
—150ns, 200ns, and 250ns Access Times
Available
—4 Megabit Memory in 1 square inch.
• Flexible Multiplane Architecture
—Four Separate Chip Selects
—32 Separate I/Os
• User Configurable I/Os—x8, x16, or x32
• User Configurable Page Size—64 Double-
words, 128 Words, or 256 Bytes
—Concurrent Read/Write Operations
• Able to Continue Reading During a
Nonvolatile Write Cycle.
• 5 Volt Byte or Page Alterable
—No Erase Before Write
• Software Data Protection
• Early End of Write Polling
—DATA Polling
—Toggle Bit Polling
• High Reliability
—Endurance: 100,000 Cycles
—Data Retention: 100 Years
DESCRIPTION
The XM28C040P is a high density CMOS byte alter-
able nonvolatile memory array constructed on a co-
fired ceramic substrate using Xicor’s 128K x 8 compo-
nents in 32-pad leadless chip carriers. The Substrate is
a 66-pin ceramic pin grid array.
The module is configured with four separate chip
enable and write enable inputs and 32 separate I/Os.
This, along with the small footprint, provides the end
user with a large degree of flexibility in board layout and
memory configuration. In addition, with the large num-
ber of pins and the growth path being implemented, the
module will be able to grow to 16 megabits.
FUNCTIONAL DIAGRAM
OE WE1 CE1
WE2 CE2
WE3 CE3
WE4 CE4
128K x 8
128K x 8
128K x 8
128K x 8
A0-A16 I/O0-I/O7
I/O8-I/O15
I/O16-I/O23
I/O24-I/O31
©Xicor, 1995, 1996 Patents Pending
7053 8/13/97 T0/C0/D0 SH
1
Characteristics subject to change without notice