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PDF X68257J Data sheet ( Hoja de datos )
| Número de pieza | X68257J | |
| Descripción | E2 Micro-Peripheral | |
| Fabricantes | Xicor | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de X68257J (archivo pdf) en la parte inferior de esta página. Total 14 Páginas | ||
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6X86X8X25M7icrocontroller Family Compatible
256K
X68257
32,768 x 8 Bit
E2 Micro-Peripheral
FEATURES
• Multiplexed Address/Data Bus
—Direct Interface to Popular 68HC11 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 X68257 is an 32K x 8 E2PROM fabricated with
advanced CMOS Textured Poly Floating Gate Technol-
ogy. The X68257 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
R/W
E
SEL
A8–A14
AS
CONTROL
LOGIC
LX
AD
TE
CC
HO
ED
SE
SOFTWARE
DATA
PROTECT
32K x 8
E2PROM
Y DECODE
I/O & ADDRESS LATCHES AND BUFFERS
A/D0–A/D7
6539 ILL F02.2
© Xicor, Inc. 1994, 1995, 1996 Patents Pending
6539-1.7 9/16/96 T0/C1/D2 SH
1
Characteristics subject to change without notice
1 page  
X68257
Toggle Bit Polling
Because the typical write timing is less than the specified
5ms, Toggle Bit Polling has been provided to determine
the early end of write. During the internal programming
cycle I/O6 will toggle from “1” to “0” and “0” to “1” on
Toggle Bit Polling E Control
subsequent attempts to read the device. When the
internal cycle is complete, the toggling will cease and the
device will be accessible for additional read or write
operations.
OPERATION
CE
LAST BYTE
WRITTEN
AS
A/D0–A/D7
A8–A14
AIN DIN
An
E
I/O6=X
I/O6=X
AIN DOUT
An
AIN DOUT
An
I/O6=X
I/O6=X
X68257 READY FOR
NEXT OPERATION
AIN DOUT
An
AIN DOUT
An
AIN
ADDR
R/W
6539 FHD F08.2
5
5 Page 
X68257
PACKAGING INFORMATION
28-LEAD PLASTIC DUAL IN-LINE PACKAGE TYPE P
1.470 (37.34)
1.400 (35.56)
PIN 1 INDEX
PIN 1
1.300 (33.02)
REF.
0.557 (14.15)
0.510 (12.95)
0.085 (2.16)
0.040 (1.02)
SEATING
PLANE
0.160 (4.06)
0.120 (3.05)
0.110 (2.79)
0.090 (2.29)
0.065 (1.65)
0.040 (1.02)
0.625 (15.88)
0.590 (14.99)
0.160 (4.06)
0.125 (3.17)
0.030 (0.76)
0.015 (0.38)
0.022 (0.56)
0.014 (0.36)
TYP. 0.010 (0.25)
0°
15°
NOTE:
1. ALL DIMENSIONS IN INCHES (IN PARENTHESES IN MILLIMETERS)
2. PACKAGE DIMENSIONS EXCLUDE MOLDING FLASH
3926 FHD F04
11
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet X68257J.PDF ] | |
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| Número de pieza | Descripción | Fabricantes |
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| X68257J | E2 Micro-Peripheral | Xicor |
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