X28HC64 Datasheet, PDF (1/24 Pages) Xicor Inc. – 5 Volt, Byte Alterable E2PROM

X28HC64
64K
X28HC64
8K x 8 Bit
5 Volt, Byte Alterable E²PROM
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
• High Reliability
—Endurance: 100,000 Cycles
—Data Retention: 100 Years
• JEDEC Approved Byte-Wide Pinout
DESCRIPTION
The X28HC64 is an 8K x 8 E²PROM, 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 E²PROMs are designed and tested for applica-
tions requiring extended endurance. Inherent data re-
tention is greater than 100 years.
PIN CONFIGURATIONS
NC
A12
A7
A6
A5
A4
A3
A2
A1
A0
I/O0
I/O1
I/O2
VSS
PLASTIC DIP
FLAT PACK
CERDIP
SOIC
1
28
2
27
3
26
4
25
5
24
6
23
7
22
X28HC64
8
21
9
20
10
19
11
18
12
17
13
16
14
15
VCC
WE
NC
A8
A9
A11
OE
A10
CE
I/O7
I/O6
I/O5
I/04
I/O3
3857 FHD F02.1
LCC
PLCC
4 3 2 1 32 31 30
A6 5
29 A8
A5 6
28 A9
A4 7
27 A11
A3 8
A2 9
X28HC64
26 NC
25 OE
A1 10
24 A10
A0 11
23 CE
NC 12
22 I/O7
I/O0 13
21 I/O6
14 15 16 17 18 19 20
3857 FHD F03
A2
1
A1
2
A0
3
I/O0
4
I/O1
5
I/O2
6
NC
7
VSS
8
NC
9
I/O3
10
I/O4
11
I/O5
12
I/O6
13
I/O7
14
CE
15
A10
16
TSOP
X28HC64
32
A3
31
A4
30
A5
29
A6
28
A7
27
A12
26
NC
25
NC
24
VCC
23
NC
22
WE
21
NC
20
A8
19
A9
18
A11
17
OE
PGA
3857 ILL F22
I/O1 I/O2 I/O3 I/O5 I/O6
12
13
15
17
18
I/O0 A0
VSS I/O4 I/O7
11
10
14
16
19
A1
A2
9
8
CE A10
20
21
X28HC64
A3
A4
OE A11
7
6
22
23
A5
A12 VCC A9
A8
5
2
28
24
25
A6
A7
NC
WE NC
4
3
1
27
26
BOTTOM VIEW
3857 FHD F04
© Xicor, Inc. 1994, 1995, 1996 Patents Pending
3857-3.0 8/5/97 T1/C0/D0 EW
1
Characteristics subject to change without notice