XM20C64 Datasheet, PDF (1/11 Pages) Xicor Inc. – High Speed AUTOSTORE™ NOVRAM

XM20C64
64K
XM20C64
High Speed AUTOSTORE^™ NOVRAM
8K x 8
FEATURES
• High Speed: t_AA = 55ns
• NO Batteries!!
• Low Power CMOS
• AUTOSTORE^™ NOVRAM
—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 V_CC 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 1
A12 2
A7 3
A6 4
A5 5
A4 6
A3 7
A2 8
A1 9
A0 10
I/O0 11
I/O1 12
I/O2 13
VSS 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