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X20C16E-35 Datasheet

  • X20C16E-35

  • High Speed AUTOSTORE⑩ NOVRAM

  • 21頁

  • XICOR   XICOR

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A
PPLICATION
N
OTE
A V A I L A B L E
X20C16
16K
AN56
X20C16
High Speed AUTOSTORE鈩?NOVRAM
2K x 8 Bit
FEATURES
DESCRIPTION
The Xicor X20C16 is a 2K x 8 NOVRAM featuring a high-
speed static RAM overlaid bit-for-bit with a nonvolatile
electrically erasable PROM (E
2
PROM) and the
AUTOSTORE feature which automatically saves the
RAM contents to E
2
PROM at power-down. The X20C16
is fabricated with advanced CMOS floating gate technol-
ogy to achieve high speed with low power and wide
power-supply margin. The X20C16 features a compat-
ible JEDEC approved pinout for byte-wide memories,
for 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 10碌s or
less. An automatic array recall operation reloads the
contents of the E
2
PROM into RAM upon power-up.
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>
鈥?/div>
Fast Access Time: 35ns, 45ns, 55ns
High Reliability
鈥擡ndurance: 1,000,000 Nonvolatile Store
Operations
鈥擱etention: 100 Years Minimum
AUTOSTORE鈩?NOVRAM
鈥擜utomatically Stores RAM Data Into the
E
2
PROM Array When V
CC
Low Threshold is
Detected
鈥擴ser Enabled Option
鈥擮pen Drain AUTOSTORE Status Output Pin
Power-on Recall
鈥擡
2
PROM Data Automatically Recalled Into
RAM Upon Power-up
Software Data Protection
鈥擫ocks 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
PIN CONFIGURATION
PLASTIC
CERDIP
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
X20C16 21
20
19
18
17
16
15
VCC
WE
AS
A8
A9
NC
OE
A10
CE
I/O7
I/O6
I/O5
I/O4
I/O3
NC
OE
A9
A8
AS
WE
VCC
NE
NC
A7
A6
A5
3826 FHD F15.1
TSOP
A
2
A
1
A
0
N/C
I/O
0
I/O
1
I/O
2
V
SS
V
SS
I/O
3
I/O
4
I/O
5
I/O
6
I/O
7
CE
A
10
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
LCC
PLCC
VCC
WE
NC
NE
NC
SOIC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
X20C16
28
27
26
25
24
23
22
21
20
19
18
17
16
15
A10
CE
I/O7
I/O6
I/O5
I/O4
I/O3
VSS
I/O2
I/O1
I/O0
A0
A1
A2
3826 FHD F03
X20C16
4
A6
A5
A4
A3
5
6
7
8
9
10
11
12
3
2
1 32 31 30
29
28
27
26
A8
A9
NC
NC
OE
A10
CE
I/O7
I/O6
A2
A1
A0
NC
I/O0
X20C16
(TOP VIEW)
3826 FHD F02
3826 ILL F17.2
21
13
14 15 16 17 18 19 20
I/O1
I/O2
VSS
NC
I/O3
I/O4
I/O5
A4
A3
AUTOSTORE鈩?NOVRAM is a trademark of Xicor, Inc.
漏Xicor, Inc. 1991, 1995, 1996 Patents Pending
3826-2.9 7/31/97 T4/C0/D0 SH
1
Characteristics subject to change without notice
AS
25
24
23
22
A7
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
A
3
A
4
A
5
A
6
A
7
NC
NE
V
CC
V
CC
WE
AS
NC
A
8
A
9
NC
OE

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