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X28HC256TM-70 Datasheet(PDF) 1 Page - Xicor Inc.

Part # X28HC256TM-70
Description  5 Volt, Byte Alterable E2PROM
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Manufacturer  XICOR [Xicor Inc.]
Direct Link  http://www.xicor.com
Logo XICOR - Xicor Inc.

X28HC256TM-70 Datasheet(HTML) 1 Page - Xicor Inc.

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X28HC256
1
©Xicor, Inc. 1991, 1995 Patents Pending
Characteristics subject to change without notice
3859-2.8 8/5/97 T1/C0/D0 EW
5 Volt, Byte Alterable E2PROM
FEATURES
Access Time: 70ns
Simple Byte and Page Write
—Single 5V Supply
— No External High Voltages or VPP Control
Circuits
—Self-Timed
— No Erase Before Write
— No Complex Programming Algorithms
—No Overerase Problem
Low Power CMOS:
—Active: 60mA
—Standby: 500
µA
Software Data Protection
—Protects Data Against System Level
Inadvertent Writes
High Speed Page Write Capability
Highly Reliable Direct WriteCell
—Endurance: 100,000 Write Cycles
—Data Retention: 100 Years
Early End of Write Detection
DATA Polling
—Toggle Bit Polling
DESCRIPTION
The X28HC256 is a second generation high perfor-
mance CMOS 32K x 8 E2PROM. It is fabricated with
Xicor’s proprietary, textured poly floating gate tech-
nology, providing a highly reliable 5 Volt only nonvolatile
memory.
The X28HC256 supports a 128-byte page write opera-
tion, effectively providing a 24
µs/byte write cycle and
enabling the entire memory to be typically rewritten in
less than 0.8 seconds. The X28HC256 also features
DATA Polling and Toggle Bit Polling, two methods of
providing early end of write detection. The X28HC256
also supports the JEDEC standard Software Data Pro-
tection feature for protecting against inadvertent writes
during power-up and power-down.
Endurance for the X28HC256 is specified as a minimum
100,000 write cycles per byte and an inherent data
retention of 100 years.
256K
X28HC256
32K x 8 Bit
PIN CONFIGURATION
LCC
PLCC
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
X28HC256
PLASTIC DIP
CERDIP
FLAT PACK
SOIC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
X28HC256
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
3859 ILL F22
TSOP
3859 FHD F03
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
X28HC256
3859 FHD F02


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