X20C04
4K
X20C04
512 x 8 Bit
Nonvolatile Static RAM
FEATURES
DESCRIPTION
• High Reliability
The Xicor X20C04 is a 512 x 8 NOVRAM featuring a
static RAM overlaid bit-for-bit with a nonvolatile electri-
cally erasable PROM (E2PROM). The X20C04 is fabri-
cated with advanced CMOS floating gate technology to
achieve low power and wide power-supply margin. The
X20C04 features the JEDEC approved pinout for byte-
widememories,compatiblewithindustrystandardRAMs,
ROMs, EPROMs, and E2PROMs.
—Endurance: 1,000,000 Nonvolatile Store
Operations
—Retention: 100 Years Minimum
• Power-on Recall
—E2PROM Data Automatically Recalled Into
SRAM Upon Power-up
• Lock Out Inadvertent Store Operations
• Low Power CMOS
The NOVRAM design allows data to be easily trans-
ferred from RAM to E2PROM (store) and E2PROM to
RAM (recall). The store operation is completed in 5ms or
less and the recall operation is completed in 5µs or less.
—Standby: 250µA
• Infinite E2PROM Array Recall, and RAM Read
and Write Cycles
• Compatible with X2004
Xicor NOVRAMS are designed for unlimited write
operations to RAM, either from the host or recalls from
E2PROM, andaminimum1,000,000storeoperationsto
the E2PROM. Data retention is specified to be greater
than 100 years.
PIN CONFIGURATION
LCC
PLCC
PLASTIC
CERDIP
NE
NC
1
28
27
26
25
24
23
22
21
20
19
18
17
16
15
V
CC
2
WE
NC
4
3
2
1
32 31 30
29
3
A
7
A
6
A
5
A
4
A
3
A
2
A
1
A
0
A
A
A
A
A
A
A
5
6
7
8
9
A
4
A
8
6
5
4
3
2
1
0
8
28
27
26
25
24
23
22
21
NC
NC
NC
OE
NC
CE
I/O
5
NC
NC
OE
NC
CE
I/O
6
7
X20C04
(TOP VIEW)
X20C04
8
10
11
12
13
9
10
11
12
13
14
7
NC
I/O
I/O
I/O
I/O
I/O
7
0
1
2
6
5
4
3
I/O
I/O
I/O
I/O
V
0
6
14 15 16 17 18 19 20
SS
3825 FHD F03
3825 FHD F02
©Xicor, Inc. 1992, 1995, 1996 Patents Pending
3825-2.8 7/31/97 T4/C0/D0 SH
Characteristics subject to change without notice
1
XICOR [ XICOR INC. ]
