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PDF ( 数据手册 , 数据表 ) XM28C040

零件编号 XM28C040
描述 5 Volt/ Byte Alterable E2PROM
制造商 Xicor Inc.
LOGO Xicor Inc. LOGO 


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XM28C040 数据手册, 描述, 功能
XM28C040
4 Megabit Module
XM28C040
5 Volt, Byte Alterable E2PROM
512K x 8 Bit
TYPICAL FEATURES
High Density 4 Megabit (512K x 8) Module
Access Time of 200ns at –55°C to +125°C
Base Memory Component: Xicor X28C010
Pinout Conforms to JEDEC Standard for
4 Megabit E2PROM
Fast Write Cycle Times
—256 Byte Page Write
Early End of Write Detection
DATA Polling
—Toggle Bit Polling
Software Data Protection
Three Temperature Ranges
—Commercial: 0°C to +75°C
—Industrial: –40° to +85°C
—Military: –55° to +125°C
High Rel Modules all Components are
MIL-STD-883 Compliant
Endurance: 100,000 Cycles
DESCRIPTION
The XM28C040 is a high density 4 Megabit E2PROM
comprised of four X28C010's mounted on a co-fired
multilayered ceramic substrate. Individual components
are 100% tested prior to assembly in module form and
then 100% tested after assembly.
The XM28C040 is configured 512K x 8 bit. The module
supports a 256-byte page write operation. This com-
bined with DATA Polling or Toggle Bit Polling, effectively
provides a 39µs/byte write cycle, enabling the entire
array to be rewritten in 10 seconds.
The XM28C040 provides the same high endurance and
data retention as the X28C010.
FUNCTIONAL DIAGRAM
X28C010
A0–A16
I/O0–I/O7
OE
WE
CE
A0–A16
I/O0–I/O7
OE
WE
CE
A18
A17
X28C010
A0–A16
I/O0–I/O7
OE
WE
CE
X28C010
A0–A16
I/O0–I/O7
OE
WE
CE
X28C010
A0–A16
I/O0–I/O7
OE
WE
CE
PIN CONFIGURATION
A18
A16
A15
A12
A7
A6
A5
A4
A3
A2
A1
A0
I/O0
I/O1
I/O2
VSS
1 32
2 31
3 30
4 29
5 28
6 27
7 26
8 25
XM28C040
9 24
10 23
11 22
12 21
13 20
14 19
15 18
16 17
VCC
WE
A17
A14
A13
A8
A9
A11
OE
A10
CE
I/O7
I/O6
I/O5
I/04
I/O3
3873 FHD F02
© Xicor, Inc. 1991-1997 Patents Pending
3873-1.7 6/13/97 T1/C0/D0 SH
3873 FHD F01
1
Characteristics subject to change without notice







XM28C040 pdf, 数据表
XM28C040
RESETTING SOFTWARE DATA PROTECTION
Figure 8. Reset Software Data Protection Timing Sequence
VCC
DATA AA
ADDR. 5555
A0–A16*
CE
55
2AAA
80
5555
AA
5555
55
2AAA
20
5555
tWC
STANDARD
OPERATING
MODE
WE
*A17 & A18 select one of four devices on the module.
3873 FHD F16
Figure 9. Software Sequence to Deactivate
Software Data Protection
WRITE DATA AA
TO ADDRESS
5555
In the event the user wants to deactivate the software
data protection feature for testing or reprogramming in
an E2PROM programmer, the following six step algo-
rithm will reset the internal protection circuit. After tWC,
the device will be in standard operating mode.
WRITE DATA 55
TO ADDRESS
2AAA
WRITE DATA 80
TO ADDRESS
5555
WRITE DATA AA
TO ADDRESS
5555
WRITE DATA 55
TO ADDRESS
2AAA
WRITE DATA 20
TO ADDRESS
5555
3873 FHD F17
SYMBOL TABLE
WAVEFORM INPUTS
OUTPUTS
Must be
steady
May change
from LOW
to HIGH
May change
from HIGH
to LOW
Don’t Care:
Changes
Allowed
N/A
Will be
steady
Will change
from LOW
to HIGH
Will change
from HIGH
to LOW
Changing:
State Not
Known
Center Line
is High
Impedance
8







XM28C040 equivalent, schematic
XM28C040
PACKAGING INFORMATION
32-PIN DUAL-IN-LINE MODULE USING
STRETCHED CERAMIC LEADLESS CHIP CARRIERS
ON SIDE BRAZED CERAMIC SUBSTRATE
PIN 1
1.610 (40.89)
1.590 (40.39)
0.020 (0.51)
0.016 (0.41)
1.508 (38.30)
1.492 (37.90)
TOL. NON. ACCUM.
0.610 (15.49)
0.590 (14.99)
0.300MAX.
(7.62)
.125 MIN.
(3.18)
.100 ± .005
(2.54 ± .13)
TYP.
0.604 (15.34)
0.596 (15.14)
NOTES:
1. ALL DIMENSIONS IN INCHES (IN PARENTHESES IN MILLIMETERS)
2. DIMENSIONS WITH NO TOLERANCE FOR REFERENCE ONLY
16
3926 ILL F47










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