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부품번호 | XM28C040-25 기능 |
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기능 | 5 Volt/ Byte Alterable E2PROM | ||
제조업체 | Xicor Inc. | ||
로고 | |||
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
DATA POLLING I/O7
Figure 2. DATA Polling Bus Sequence
LAST
WE WRITE
CE
OE
VIH
I/O7
A0–A18
An
HIGH Z
VOL
An An
An
An
VOH
READY
An An
3873 FHD F10
Figure 3. DATA Polling Software Flow
WRITE DATA
DATA Polling can effectively halve the time for writing to
the XM28C040. The timing diagram in Figure 2 illus-
trates the sequence of events on the bus. The software
flow diagram in Figure 3 illustrates one method of
implementing the routine.
WRITES
COMPLETE?
NO
YES
SAVE LAST DATA
AND ADDRESS
READ LAST
ADDRESS
IO7
COMPARE?
YES
NO
READY
3873 FHD F11
4
4페이지 XM28C040
SOFTWARE DATA PROTECTION
Figure 6. Timing Sequence—Byte or Page Write
VCC
0V
DATA
ADDR.
A0–A16*
CE
AA
5555
55
2AAA
WE
A0
5555
≤tBLC MAX
*A17 & A18 select one of four devices on the module.
WRITES
OK
BYTE
OR
PAGE
tWC
(VCC)
WRITE
PROTECTED
3873 FHD F14
Figure 7. Write Sequence for
Software Data Protection
WRITE DATA AA
TO ADDRESS
5555
WRITE DATA 55
TO ADDRESS
2AAA
Regardless of whether the device has previously been
protected or not, once the software data protected
algorithm is used and data has been written, the device
will automatically disable further writes unless another
command is issued to cancel it. If no further commands
are issued the device will be write protected during
power-down and after any subsequent power-up.
WRITE DATA A0
TO ADDRESS
5555
WRITE DATA XX
TO ANY
ADDRESS
BYTE/PAGE
LOAD ENABLED
WRITE LAST
BYTE TO
LAST ADDRESS
AFTER tWC
RE-ENTERS DATA
PROTECTED STATE
3873 FHD F15
7
7페이지 | |||
구 성 | 총 17 페이지수 | ||
다운로드 | [ XM28C040-25.PDF 데이터시트 ] |
당사 플랫폼은 키워드, 제품 이름 또는 부품 번호를 사용하여 검색할 수 있는 |
구매 문의 | 일반 IC 문의 : 샘플 및 소량 구매 ----------------------------------------------------------------------- IGBT, TR 모듈, SCR 및 다이오드 모듈을 포함한 광범위한 전력 반도체를 판매합니다. 전력 반도체 전문업체 상호 : 아이지 인터내셔날 사이트 방문 : [ 홈페이지 ] [ 블로그 1 ] [ 블로그 2 ] |
부품번호 | 상세설명 및 기능 | 제조사 |
XM28C040-20 | 5 Volt/ Byte Alterable E2PROM | Xicor Inc. |
XM28C040-25 | 5 Volt/ Byte Alterable E2PROM | Xicor Inc. |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |