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PDF X20C17PM-55 Data sheet ( Hoja de datos )
| Número de pieza | X20C17PM-55 | |
| Descripción | High Speed AUTOSTORE NOVRAM | |
| Fabricantes | Xicor | |
| Logotipo |  |
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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
1 page  
X20C17
ENDURANCE AND DATA RETENTION
Parameter
Endurance
Store Cycles
Data Retention
Min.
100,000
1,000,000
100
MODE SELECTION
CE WE OE
HXX
L HL
L LH
L LH
L LL
L HH
Mode
Not Selected
Read RAM
Write “1” RAM
Write “0” RAM
Not Allowed
No Operation
Units
Data Changes Per Bit
Store Cycles
Years
2015 PGM T07.1
I/O
Output High Z
Output Data
Input Data High
Input Data Low
Output High Z
Output High Z
Power
Standby
Active
Active
Active
Active
Active
2015 PGM T09
EQUIVALENT A.C. LOAD CIRCUIT
5V
893Ω
OUTPUT
347Ω
30pF
2015 FHD F04
A.C. CONDITIONS OF TEST
Input Pulse Levels
Input Rise and
Fall Times
Input and Output
Timing Levels
0V to 3V
5ns
1.5V
2015 PGM T08.1
5
5 Page 
X20C17
ORDERING INFORMATION
X20C17 X X -X
Device
Access Time
–35 = 35ns
–45 = 45ns
–55 = 55ns
Temperature Range
Blank = Commercial = 0°C to +70°C
I = Industrial = –40°C to +85°C
M = Military = –55°C to +125°C
Package
P = 24 Lead Plastic Dip
LIMITED WARRANTY
Devices sold by Xicor, Inc. are covered by the warranty and patent indemnification provisions appearing in its Terms of Sale only. Xicor, Inc. makes
no warranty, express, statutory, implied, or by description regarding the information set forth herein or regarding the freedom of the described
devices from patent infringement. Xicor, Inc. makes no warranty of merchantability or fitness tor any purpose. Xicor, Inc. reserves the right to
discontinue production and change specifications and prices at any time and without notice.
Xicor, Inc. assumes no responsibility for the use of any circuitry other than circuitry embodied in a Xicor, Inc. product. No other circuits, patents,
licenses are implied.
US. PATENTS
Xicor products are covered by one or more of the following U.S. Patents: 4,263,664; 4,274,012; 4,300,212; 4,314,265; 4,326,134; 4,393,481;
4,404,475; 4,450,402; 4,486,769; 4,488,060; 4,520,461; 4,533,846; 4,599,706; 4,617,652; 4,668,932; 4,752,912; 4,829,482; 4,874,967;
4,883,976. Foreign patents and additional patents pending.
LIFE RELATED POLICY
In situations where semiconductor component failure may endanger life, system designers using this product should design the system with
appropriate error detection and correction, redundancy and back-up features to prevent such an occurrence.
Xicor’s products are not authorized for use as critical components in life support devices or systems.
1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life,
and whose failure to perform, when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected
to result in a significant injury to the user.
2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure
of the life support device or system, or to affect its satety or effectiveness.
11
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| PDF Descargar | [ Datasheet X20C17PM-55.PDF ] | |
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