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參數資料
| 型號： | X28VC256TMB-90 |
| 英文描述： | 5 Volt, Byte Alterable E2PROM |
| 中文描述： | 5伏，可變E2PROM的字節 |
| 文件頁數： | 1/24頁 |
| 文件大?。?/td> | 109K |
| 代理商： | X28VC256TMB-90 |
X28VC256
1
Xicor, Inc. 1991, 1995 Patents Pending
3869-2.6 4/2/96 T4/C4/D0 NS
Characteristics subject to change without notice
5 Volt, Byte Alterable E
2
PROM
FEATURES
Access Time: 45ns
Simple Byte and Page Write
—Single 5V Supply
—No External High Voltages or V
PP
Control
Circuits
—Self-Timed
—No Erase Before Write
—No Complex Programming Algorithms
—No Overerase Problem
Low Power CMOS:
—Active: 80mA
—Standby: 10mA
Software Data Protection
—Protects Data Against System Level
Inadvertent Writes
High Speed Page Write Capability
Highly Reliable Direct Write
Cell
—Endurance: 100,000 Write Cycles
—Data Retention: 100 Years
Early End of Write Detection
—
DATA
Polling
—Toggle Bit Polling
DESCRIPTION
The X28VC256 is a second generation high perfor-
mance CMOS 32K x 8 E
2
PROM. It is fabricated with
Xicor’s proprietary, textured poly floating gate tech-
nology, providing a highly reliable 5 Volt only nonvolatile
memory.
The X28VC256 supports a 128-byte page write opera-
tion, effectively providing a 24
μ
s/byte write cycle and
enabling the entire memory to be typically rewritten in
less than 0.8 seconds. The X28VC256 also features
DATA
Polling and Toggle Bit Polling, two methods of
providing early end of write detection. The X28VC256
also supports the JEDEC standard Software Data Pro-
tection feature for protecting against inadvertent writes
during power-up and power-down.
Endurance for the X28VC256 is specified as a minimum
100,000 write cycles per byte and an inherent data
retention of 100 years.
256K
X28VC256
32K x 8 Bit
PIN CONFIGURATION
A14
A12
A7
A6
A5
A4
A3
A2
A1
A0
I/O0
I/O1
I/O2
VSS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
VCC
WE
A13
A8
A9
A11
OE
A10
CE
I/O7
I/O6
I/O5
I/04
I/O3
X28VC256
3869 FHD F02
PLASTIC DIP
CERDIP
FLAT PACK
SOIC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
X28VC256
A3
A4
A5
A6
A7
A12
A14
NC
VCC
NC
WE
A13
A8
A9
A11
OE
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
A2
A1
A0
I/O0
I/O1
I/O2
NC
VSS
NC
I/O3
I/O4
I/O5
I/O6
I/O7
CE
A10
TSOP
A6
A5
A4
A3
A2
A1
A0
NC
I/O0
A8
A9
A11
NC
OE
A10
CE
I/O7
I/O6
4
3
2
1 32 31 30
14 15 16 17 18 19 20
5
6
7
8
9
10
11
12
13
29
28
27
26
25
24
23
22
21
X28VC256
A7
A1
A1
N
VC
W
A1
I1
I2
VS
N
I3
I4
I5
LCC
PLCC
3869 FHD F03
3869 ILL F22
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