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PDF X22C12P Data sheet ( Hoja de datos )

Número de pieza X22C12P
Descripción Nonvolatile Static RAM
Fabricantes Xicor 
Logotipo Xicor Logotipo



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X22C12
1K Bit
X22C12
Nonvolatile Static RAM
256 x 4
FEATURES
High Performance CMOS
—150ns RAM Access Time
High Reliability
—Store Cycles: 1,000,000
—Data Retention: 100 Years
Low Power Consumption
—Active: 40mA Max.
—Standby: 100µA Max.
Infinite Array Recall, RAM Read and Write Cycles
Nonvolatile Store Inhibit: VCC = 3.5V Typical
Fully TTL and CMOS Compatible
JEDEC Standard 18-Pin 300-mil DIP
100% Compatible with X2212
—With Timing Enhancements
DESCRIPTION
The X22C12 is a 256 x 4 CMOS NOVRAM featuring a
high-speed static RAM overlaid bit-for-bit with a non-
volatile E2PROM. The NOVRAM design allows data to
be easily transferred from RAM to E2PROM (STORE)
and from E2PROM to RAM (RECALL). The STORE
operation is completed within 5ms or less and the
RECALL is completed within 1µs.
Xicor NOVRAMs are designed for unlimited write opera-
tions to the RAM, either RECALLs from E2PROM or
writes from the host. The X22C12 will reliably endure
1,000,000 STORE cycles. Inherent data retention is
greater than 100 years.
FUNCTIONAL DIAGRAM
PIN CONFIGURATION
A0
A1
A2
A3
A4
STORE
RECALL
I/O1
I/O2
I/O3
I/O4
CS
WE
NONVOLATILE E2PROM
MEMORY ARRAY
ROW
SELECT
STATIC RAM
MEMORY ARRAY
CONTROL
LOGIC
INPUT
DATA
CONTROL
COLUMN
I/O CIRCUITS
COLUMN SELECT
A7 A6 A5
STORE
ARRAY
RECALL
VCC
VSS
3817 FHD F01
A7
A4
A3
A2
A1
A0
CS
VSS
STORE
PLASTIC DIP
CERDIP
1 18
2 17
3 16
4 15
5 X22C12 14
6 13
7 12
8 11
9 10
VCC
A6
A5
I/O4
I/O3
I/O2
I/01
WE
RECALL
3817 FHD F02
A7
A4
A3
A2
A1
A0
CS
VSS
STORE
RECALL
SOIC
1 20
2 19
3 18
4 17
X22C12
5 16
6 15
7 14
8 13
9 12
10 11
VCC
A6
A5
I/O4
NC
NC
I/O3
I/O2
I/O1
WE
3815 FHD F10.1
© Xicor, Inc. 1991, 1995 Patents Pending
3817-2.4 7/30/96 T0/C0/D1 SH
1 Characteristics subject to change without notice

1 page




X22C12P pdf
X22C12
A.C. CHARACTERISTICS (Over the recommended operating conditions, unless otherwise specified.)
Read Cycle Limits
Symbol
Parameter
Min.
Max.
Units
tRC
tAA
tCO
tOH
tLZ(6)
tHZ(6)
Read Cycle Time
Access Time
Chip Select to Output Valid
Output Hold from Address Change
Chip Select to Output in Low Z
Chip Deselect to Output in High Z
150
150
150
0
0
50
ns
ns
ns
ns
ns
ns
3817 PGM T08
Read Cycle
ADDRESS
CS
DATA I/O
tRC
tA
tCO
tLZ
tOH tHZ
DATA VALID
3817 FHD F03
Note: (6) tLZ min. and tHZ min. are periodically sampled and not 100% tested.
5

5 Page





X22C12P arduino
X22C12
20-LEAD PLASTIC SMALL OUTLINE GULL WING PACKAGE TYPE S
0° – 8°
PIN 1 INDEX
PIN 1
0.290 (7.37) 0.393 (10.00)
0.299 (7.60) 0.420 (10.65)
(4X) 7°
0.014 (0.35)
0.020 (0.50)
0.496 (12.60)
0.508 (12.90)
0.050 (1.27)
0.010 (0.25)
0.020 (0.50) X 45°
0.015 (0.40)
0.050 (1.27)
0.092 (2.35)
0.105 (2.65)
0.003 (0.10)
0.012 (0.30)
0.050" Typical
0.007 (0.18)
0.011 (0.28)
0.420"
0.050"
Typical
FOOTPRINT
0.030" Typical
20 Places
NOTE: ALL DIMENSIONS IN INCHES (IN PARENTHESES IN MILLIMETERS)
3926 FHD F23
11

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