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X28HC64 数据手册 - Xicor
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X28HC64数据手册
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X28HC64
1
64K X28HC64 8K x 8 Bit
5 Volt, Byte Alterable E
2
PROM
© Xicor, Inc. 1994, 1995, 1996 Patents Pending Characteristics subject to change without notice
3857-3.0 8/5/97 T1/C0/D0 EW
FEATURES
• 55ns Access Time
• 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
—40 mA Active Current Max.
—200 µA Standby Current Max.
• Fast Write Cycle Times
—64 Byte Page Write Operation
—Byte or Page Write Cycle: 2ms Typical
—Complete Memory Rewrite: 0.25 sec. Typical
—Effective Byte Write Cycle Time: 32µs Typical
• Software Data Protection
• End of Write Detection
—DATA Polling
—Toggle Bit
PIN CONFIGURATIONS
3857 FHD F03
A
6
A
5
A
4
A
3
A
2
A
1
A
0
NC
I/O
0
A
8
A
9
A
11
NC
OE
A
10
CE
I/O
7
I/O
6
4321323130
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
X28HC64
LCC
PLCC
A
7
A
12
NC
NC
V
CC
WE
NC
I/O
1
I/O
2
V
SS
NC
I/O
3
I/O
4
I/O
5
3857 ILL F22
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
X28HC64
A
3
A
4
A
5
A
6
A
7
A
12
NC
NC
V
CC
NC
WE
NC
A
8
A
9
A
11
OE
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
A
2
A
1
A
0
I/O
0
I/O
1
I/O
2
NC
V
SS
NC
I/O
3
I/O
4
I/O
5
I/O
6
I/O
7
CE
A
10
TSOP
3857 FHD F02.1
NC
A
12
A
7
A
6
A
5
A
4
A
3
A
2
A
1
A
0
I/O
0
I/O
1
I/O
2
V
SS
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
V
CC
WE
NC
A
8
A
9
A
11
OE
A
10
CE
I/O
7
I/O
6
I/O
5
I/0
4
I/O
3
X28HC64
PLASTIC DIP
FLAT PACK
CERDIP
SOIC
• High Reliability
—Endurance: 100,000 Cycles
—Data Retention: 100 Years
• JEDEC Approved Byte-Wide Pinout
DESCRIPTION
The X28HC64 is an 8K x 8 E
2
PROM, fabricated with
Xicor’s proprietary, high performance, floating gate
CMOS technology. Like all Xicor programmable non-
volatile memories the X28HC64 is a 5V only device. The
X28HC64 features the JEDEC approved pinout for byte-
wide memories, compatible with industry standard RAMs.
The X28HC64 supports a 64-byte page write operation,
effectively providing a 32µs/byte write cycle and en-
abling the entire memory to be typically written in 0.25
seconds. The X28HC64 also features DATA Polling and
Toggle Bit Polling, two methods providing early end of
write detection. In addition, the X28HC64 includes a
user-optional software data protection mode that further
enhances Xicor’s hardware write protect capability.
Xicor E
2
PROMs are designed and tested for applica-
tions requiring extended endurance. Inherent data re-
tention is greater than 100 years.
PGA
X28HC64
11
I/O
0
10
A
0
14
V
SS
9
A
1
8
A
2
7
A
3
6
A
4
5
A
5
2
A
12
28
V
CC
12
I/O
1
13
I/O
2
15
I/O
3
4
A
6
3
A
7
1
NC
16
I/O
4
20
CE
22
OE
24
A
9
17
I/O
5
27
WE
19
I/O
7
21
A
10
23
A
11
25
A
8
18
I/O
6
26
NC
BOTTOM VIEW
3857 FHD F04
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