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X20C17P-35 Datasheet دیتاشیت PDF دانلود

دیتاشیت - Xicor - High Speed AUTOSTORE NOVRAM

شماره قطعه X20C17P-35
شرح مفصل High Speed AUTOSTORE NOVRAM
تولید کننده Xicor 
آرم Xicor 


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X20C17P-35 شرح
APPLICATION NOTE
AVA I L A B L E
X20C17 AN56
16K X20C17
High Speed AUTOSTORE™ NOVRAM
2K x 8 Bit
FEATURES
24-Pin Standard SRAM DIP Pinout
Fast Access Time: 35ns, 45ns, 55ns
High Reliability
—Endurance: 1,000,000 Nonvolatile Store
Operations
—Retention: 100 Years Minimum
AUTOSTORE™ NOVRAM
—Automatically Stores SRAM Data Into the
E2PROM Array When VCC Low Threshold is
Detected
—E2PROM Data Automatically Recalled Into
RAM Upon Power-up
Low Power CMOS
—Standby: 250µA
Infinite E2PROM Array Recall, and RAM Read
and Write Cycles
DESCRIPTION
The Xicor X20C17 is a 2K x 8 NOVRAM featuring a high-
speed static RAM overlaid bit-for-bit with a nonvolatile
electrically erasable PROM (E2PROM) and the
AUTOSTORE feature which automatically saves the
RAM contents to E2PROM at power-down. The X20C17
is fabricated with advanced CMOS floating gate technol-
ogy to achieve high speed with low power and wide
power-supply margin. The X20C17 features a compat-
ible JEDEC approved byte-wide memory pinout for
industry standard SRAMs.
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 2.5ms
or less. An automatic array recall operation reloads the
contents of the E2PROM into RAM upon power-up.
Xicor NOVRAMS are designed for unlimited write
operations to RAM, either from the host or recalls from
E2PROM, and a minimum 1,000,000 store operations to
the E2PROM. Data retention is specified to be greater
than 100 years.
PIN CONFIGURATION
PLASTIC
A7
A6
A5
A4
A3
A2
A1
A0
I/O0
I/O1
I/O2
VSS
1 24
2 23
3 22
4 21
5 20
6 19
X20C17
7 18
8 17
9 16
10 15
11 14
12 13
VCC
A8
A9
WE
OE
A10
CE
I/O7
I/O6
I/O5
I/O4
I/O3
2015 ILL F02.1
AUTOSTORE™ NOVRAM is a trademark of Xicor, Inc.
©Xicor, Inc. 1992, 1995 Patents Pending
2015-2.5 8/1/97 T1/C0/D0 SH
1
Characteristics subject to change without notice

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