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PDF ( 数据手册 , 数据表 ) XM28C020I-25

零件编号 XM28C020I-25
描述 5 Volt/ Byte Alterable E2PROM
制造商 Xicor Inc.
LOGO Xicor Inc. LOGO 


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XM28C020I-25 数据手册, 描述, 功能
XM28C020
2 Megabit Module
XM28C020
5 Volt, Byte Alterable E2PROM
256K x 8 Bit
TYPICAL FEATURES
High Density 2 Megabit (256K x 8) Module
Access Time of 150ns at –55°C to +125°C
Base Memory Component: Xicor X28C513
Pinout conforms to JEDEC Standard for
2 Megabit E2PROM
Fast Write Cycle Times
—128 Byte Page Write
—Byte or Page Write Cycle: 5ms Typical
—Complete Memory Rewrite: 10 Seconds
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 Module
—100% MIL-STD-883 Compliant Components
Endurance: 100,000 Cycles
FUNCTIONAL DIAGRAM
X28C513
A0–A15
I/O0–I/O7
OE
WE
CE
A0–A15
I/O0–I/O7
OE
WE
CE
A16
A17
X28C513
A0–A15
I/O0–I/O7
OE
WE
CE
© Xicor, Inc. 1991, 1995, 1996 Patents Pending
3872-1.9 6/18/97 T1/C0/D0 SH
DESCRIPTION
The XM28C020 is a high density 2 Megabit E2PROM
comprised of four X28C513 LCCs 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 XM28C020 is configured 256K x 8 bit. The module
supports a 128-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 XM28C020 provides the same high endurance and
data retention as the X28C513.
X28C513
A0–A15
I/O0–I/O7
OE
WE
CE
X28C513
A0–A15
I/O0–I/O7
OE
WE
CE
PIN CONFIGURATION
NC
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
XM28C020
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
3872 FHD F01
1
3872 FHD F02
Characteristics subject to change without notice







XM28C020I-25 pdf, 数据表
XM28C020
RESETTING SOFTWARE DATA PROTECTION
Figure 8. Reset Software Data Protection Timing Sequence
VCC
DATA AA
ADDRESS 5555
A0–A15*
CE
55
2AAA
80
5555
AA
5555
55
2AAA
20
5555
tWC
STANDARD
OPERATING
MODE
WE
*A16 & A17 select one of four devices on the module.
3872 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
3872 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







XM28C020I-25 equivalent, schematic
XM28C020
ORDERING INFORMATION
2 MEGABIT E2 MODULES
Device
XM28C020 X
X –X
Access Time
12 = 120ns
15 = 150ns
20 = 200ns
25 = 250ns
Temperature Range
Blank = 0°C to +70°C
I = –40°C to +85°C
M = –55°C to +125°C
MHR = –55°C to +125°C
(High Rel. Processing)
Blank = 32-Lead Ceramic Module
P = 66 Pin PUMA Module (64K x 32 Bit)
LIMITED WARRANTY
Devices sold by Xicor, Inc. are covered by the warranty and patent indemnification provisions appearing in its Terms of Sale only. Xicor, Inc. makes no warranty,
express, statutory, implied, or by description regarding the information set forth herein or regarding the freedom of the described devices from patent infringement.
Xicor, Inc. makes no warranty of merchantability or fitness for any purpose. Xicor, Inc. reserves the right to discontinue production and change specifications and
prices at any time and without notice.
Xicor, Inc. assumes no responsibility for the use of any circuitry other than circuitry embodied in a Xicor, Inc. product. No other circuits, patents, licenses are
implied.
U.S. PATENTS
Xicor products are covered by one or more of the following U.S. Patents: 4,263,664; 4,274,012; 4,300,212; 4,314,265; 4,326,134; 4,393,481; 4,404,475;
4,450,402; 4,486,769; 4,488,060; 4,520,461; 4,533,846; 4,599,706; 4,617,652; 4,668,932; 4,752,912; 4,829, 482; 4,874, 967; 4,883, 976. Foreign patents and
additional patents pending.
LIFE RELATED POLICY
In situations where semiconductor component failure may endanger life, system designers using this product should design the system with appropriate error
detection and correction, redundancy and back-up features to prevent such an occurence.
Xicor's products are not authorized for use in critical components in life support devices or systems.
1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and whose
failure to perform, when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant
injury to the user.
2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life
support device or system, or to affect its safety or effectiveness.
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