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X20C04E-20 Datasheet

  • X20C04E-20

  • Nonvolatile Static RAM

  • 15頁

  • XICOR   XICOR

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X20C04
4K
X20C04
Nonvolatile Static RAM
512 x 8 Bit
FEATURES
DESCRIPTION
The Xicor X20C04 is a 512 x 8 NOVRAM featuring a
static RAM overlaid bit-for-bit with a nonvolatile electri-
cally erasable PROM (E
2
PROM). 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-
wide memories, compatible with industry standard RAMs,
ROMs, EPROMs, and E
2
PROMs.
The NOVRAM design allows data to be easily trans-
ferred from RAM to E
2
PROM (store) and E
2
PROM to
RAM (recall). The store operation is completed in 5ms or
less and the recall operation is completed in 5碌s or less.
Xicor NOVRAMS are designed for unlimited write
operations to RAM, either from the host or recalls from
E
2
PROM, and a minimum 1,000,000 store operations to
the E
2
PROM. Data retention is specified to be greater
than 100 years.
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
High Reliability
鈥擡ndurance: 1,000,000 Nonvolatile Store
Operations
鈥擱etention: 100 Years Minimum
Power-on Recall
鈥擡
2
PROM Data Automatically Recalled Into
SRAM Upon Power-up
Lock Out Inadvertent Store Operations
Low Power CMOS
鈥擲tandby: 250
碌
A
Infinite E
2
PROM Array Recall, and RAM Read
and Write Cycles
Compatible with X2004
PIN CONFIGURATION
PLASTIC
CERDIP
NC
LCC
PLCC
VCC
WE
NE
NC
NC
A7
NE
NC
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
X20C04 21
20
19
18
17
16
15
VCC
WE
NC
A8
NC
NC
OE
NC
CE
I/O7
I/O6
I/O5
I/O4
I/O3
A6
A5
A4
A3
A2
A1
A0
NC
I/O0
5
6
7
8
9
4
3
2
1 32 31 30
29
28
27
26
A8
NC
NC
NC
OE
NC
CE
I/O7
I/O6
X20C04
(TOP VIEW)
25
24
23
22
10
11
12
13
21
14 15 16 17 18 19 20
I/O1
I/O2
VSS
NC
I/O3
I/O4
I/O5
3825 FHD F02
3825 FHD F03
漏Xicor, Inc. 1992, 1995, 1996 Patents Pending
3825-2.8 7/31/97 T4/C0/D0 SH
1
Characteristics subject to change without notice

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