X88257 Datasheet, PDF (1/15 Pages) Xicor Inc. – E2 Micro-Peripheral

8X0858125M7icrocontroller Family Compatible
256K
X88257
32,768 x 8 Bit
E² Micro-Peripheral
FEATURES
• Multiplexed Address/Data Bus
—Direct Interface to Popular 8051 Family
• High Performance CMOS
—Fast Access Time, 120ns
—Low Power
—60mA Active Maximum
—500µA Standby Maximum
• Software Data Protection
• Toggle Bit Polling
—Early End of Write Detection
• Page Mode Write
—Allows up to 128 Bytes to be Written in
One Write Cycle
• High Reliability
—Endurance: 10,000 Write Cycle
—Data Retention: 100 Years
• 28-Lead PDIP Package
• 28-Lead SOIC Package
• 32-Lead PLCC Package
DESCRIPTION
The X88257 is an 32K x 8 E²PROM fabricated with
advanced CMOS Textured Poly Floating Gate Technol-
ogy. The X88257 features a multiplexed address and
data bus allowing direct interface to a variety of popular
single-chip microcontrollers operating in expanded mul-
tiplexed mode without the need for additional interface
circuitry.
FUNCTIONAL DIAGRAM
CE, CE
WR
RD
PSEN
A8–A14
ALE
CONTROL
LOGIC
L
X
A
D
T
E
C
C
H
O
E
D
S
E
SOFTWARE
DATA
PROTECT
32K x 8
E2PROM
Y DECODE
I/O & ADDRESS LATCHES AND BUFFERS
A/D0–A/D7
6509 ILL F02.1
© Xicor, Inc. 1994-1997 Patents Pending
6509-1.9 4/9/96 T2/C5/D8 NS
1
Characteristics subject to change without notice