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XM20C64I-55 Schematic ( PDF Datasheet ) - Xicor Inc.

Teilenummer XM20C64I-55
Beschreibung High Speed AUTOSTORE NOVRAM
Hersteller Xicor Inc.
Logo Xicor Inc. Logo 




Gesamt 11 Seiten
XM20C64I-55 Datasheet, Funktion
XM20C64
64K
XM20C64
High Speed AUTOSTORENOVRAM
8K x 8
FEATURES
High Speed: tAA = 55ns
NO Batteries!!
Low Power CMOS
AUTOSTORENOVRAM
—Automatically Stores RAM data to E2PROM
upon Power-fail Detection
Open Drain AUTOSTORE Output Pin
—Provides Interrupt or Status Information
—Linkable to System Reset Circuitry
Auto Recall
—Automatically Recalls E2PROM Data During
Power-on
Fully Decoded Module
Full Military Temperature Range
— –55°C to +125°C
High Reliability
—Endurance: 1,000,000 Nonvolatile Store Cycles
—Data Retention: 100 Years
ESD Protection
2KV All Pins
Also Available in 66 Pin PUMA Package
FUNCTIONAL DIAGRAM
DESCRIPTION
The XM20C64 is a high speed nonvolatile RAM Module.
It is comprised of four Xicor X20C16 high speed
NOVRAMs, a high speed decoder and decoupling
capacitors mounted on a co-fired multilayered Ceramic
substrate. The XM20C64 is configured 8K x 8 and is fully
decoded. The module is a 28-lead DIP conforming to the
industry standard pinout for SRAMs.
The XM20C64 fully supports the AUTOSTORE feature,
providing hands-off automatic storing of RAM data
into E2PROM when VCC falls below the AUTOSTORE
threshold.
The XM20C64 is a highly reliable memory component,
supporting unlimited writes to RAM, a minimum 1,000,000
store cycles and a minimum 100 year data retention.
PIN CONFIGURATION
NE
OE
WE
A11 2 A0
A12 3 A1
CE
4
Y0
5
Y1
6
Y2
7
Y3
1
AUTOSTORE
AUTOSTORE™ NOVRAM is a trademark of Xicor, Inc.
©Xicor, Inc. 1991, 1995, 1996 Patents Pending
3874-1.6 6/20/96 T0/C2/D0 NS
2
NE
25
OE
31
WE
23
CE
2
NE
25
OE
31
WE
23
CE
2
NE
25
OE
31
WE
23
CE
2
NE
25
OE
31
WE
23
CE
A0–A10
I/O
30
A0–A10
I/O
30
A0–A10
I/O
30
A0–A10
I/O
30
1
NE
A12
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
A0–A10
28 VCC
27 WE
26 AS
25 A8
24 A9
23 A11
22 OE
21 A10
20 CE
19 I/O7
18 I/O6
17 I/O5
16 I/04
15 I/O3
3874 FHD F02.1
I/O0–I/O7
3874 FHD F01
Characteristics subject to change without notice






XM20C64I-55 Datasheet, Funktion
XM20C64
Write Cycle Limits
Symbol
tWC
tWP
tCW
tAS
tDS
tDH
tOW
tWR
Parameter
Write Cycle time
WE Pulse Width
CE Pulse Width
Address Setup
Data Setup
Data Hold
Output Active from End of Write
End of Write to Read
Min.
55
40
40
0
25
0
0
Limits
Max.
5
Units
ns
ns
ns
ns
ns
ns
ns
ns
3874 PGM T02
Write Cycle Timing Diagram
ADDRESS
OE
CE
WE
DATA OUT
DATA IN
tAS
tWC
tCW tWR
tWP
tOW
tDS
DATA VALID
tDH
3874 FHD F04
6

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