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STK22C48-SF45TR 데이터시트(PDF) 10 Page - Simtek Corporation

부품명 STK22C48-SF45TR
상세설명  2Kx8 AutoStore nvSRAM
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제조업체  SIMTEK [Simtek Corporation]
홈페이지  http://www.simtek.com
Logo SIMTEK - Simtek Corporation

STK22C48-SF45TR 데이터시트(HTML) 10 Page - Simtek Corporation

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10
Feb, 2008
Document Control #ML0004 Rev 2.0
STK22C48
HARDWARE PROTECT
The STK22C48 offers hardware protection against
inadvertent STORE operation and SRAM WRITEs dur-
ing low-voltage conditions. When V
CAP < VSWITCH, all
externally initiated STORE operations and SRAM
WRITE
s are inhibited.
AutoStore can be completely disabled by tying V
CCX
to ground and applying + 5V to V
CAP. This is the
AutoStore Inhibit mode; in this mode STOREs are only
initiated by explicit request using the HSB pin.
LOW AVERAGE ACTIVE POWER
The STK22C48 draws significantly less current
when it is cycled at times longer than 50ns. Figure 4
shows the relationship between I
CC and READ cycle
time. Worst-case current consumption is shown for
both CMOS and TTL input levels (commercial tem-
perature range, V
CC = 5.5V, 100% duty cycle on chip
enable). Figure 5 shows the same relationship for
WRITE
cycles. If the chip enable duty cycle is less
than 100%, only standby current is drawn when the
chip is disabled. The overall average current drawn
by the STK22C48 depends on the following items: 1)
CMOS
vs. TTL input levels; 2) the duty cycle of chip
enable; 3) the overall cycle rate for accesses; 4) the
ratio of READs to WRITEs; 5) the operating tempera-
ture; 6) the Vcc level; and 7) I/O loading.
Figure 4: Icc (max) Reads
0
20
40
60
80
100
50
100
150
200
Cycle Time (ns)
TTL
CMOS
Figure 5: Icc (max) Writes
0
20
40
60
80
100
50
100
150
200
Cycle Time (ns)
TTL
CMOS


유사한 부품 번호 - STK22C48-SF45TR

제조업체부품명데이터시트상세설명
logo
Simtek Corporation
STK22C48-SF45TR SIMTEK-STK22C48-SF45TR Datasheet
344Kb / 15P
   2Kx8 AutoStore nvSRAM
logo
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유사한 설명 - STK22C48-SF45TR

제조업체부품명데이터시트상세설명
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