X28C64 Datasheet, PDF (1/25 Pages) Xicor Inc. – 5 Volt, Byte Alterable E2PROM

X28C64
64K
X28C64
8K x 8 Bit
5 Volt, Byte Alterable E²PROM
FEATURES
• 150ns 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
—60mA Active Current Max.
—200µA Standby Current Max.
• Fast Write Cycle Times
—64 Byte Page Write Operation
—Byte or Page Write Cycle: 5ms Typical
—Complete Memory Rewrite: 0.625 sec. Typical
—Effective Byte Write Cycle Time: 78µs 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
PIN CONFIGURATION
DESCRIPTION
The X28C64 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 X28C64 is a 5V only device. The
X28C64 features the JEDEC approved pinout for byte-
wide memories, compatible with industry standard RAMs.
The X28C64 supports a 64-byte page write operation,
effectively providing a 78µs/byte write cycle and en-
abling the entire memory to be typically written in 0.625
seconds. The X28C64 also features DATA and Toggle
Bit Polling, a system software support scheme used to
indicate the early completion of a write cycle. In addi-
tion, the X28C64 includes a user-optional software data
protection mode that further enhances Xicor’s hard-
ware write protect capability.
Xicor E²PROMs are designed and tested for applica-
tions requiring extended endurance. Inherent data re-
tention is greater than 100 years.
PLASTIC DIP
CERDIP
FLAT PACK
SOIC
LCC
PLCC
NC 1
A12 2
A7 3
28
VCC
27 WE
4 3 2 1 32 31 30
26 NC
A6 5
29 A8
A2
A1
A0
I/O0
1
2
3
4
A6 4
A5 5
25
A8
24
A9
A5 6
A4 7
28 A9
I/O1
5
27 A11
I/O2
NC
6
7
A4 6
23
A11
A3 8
A3
7
22
X28C64
OE
A2 8
21
A10
A2 9
A1 10
A1 9
20 CE
A0 11
A0 10
19
I/O7
NC 12
X28C64
26 NC
VSS
8
25 OE
NC
9
24 A10
I/O3
I/O4
10
11
23 CE
I/O5
12
22
I/O7
I/O6
I/O7
13
14
I/O0 11
18
I/O6
I/O0
13
21
14 15 16 17 18 19 20
I/O6
CE
A10
15
16
I/O1 12
17
I/O5
I/O2 13
16
I/04
VSS 14
15
I/O3
3853 FHD F02
3853 FHD F03
TSOP
X28C64
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
3853 ILL F23.1
© Xicor, Inc. 1991, 1995 Patents Pending
3853-2.7 4/2/96 T0/C3/D2 NS
1
Characteristics subject to change without notice