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参数资料
| 型号： | STK22C48-N45I |
| 英文描述： | DIODE TVS 130V 400W UNI 5% SMA |
| 中文描述： | NVRAM中（EEPROM的基础） |
| 文件页数： | 9/10页 |
| 文件大小： | 110K |
| 代理商： | STK22C48-N45I |
STK22C48
July 1999
3-29
will stop trying to pull HSB low and abort the
STORE
attempt.
HARDWARE PROTECT
The STK22C48 offers hardware protection against
inadvertent
STORE
operation and
SRAM WRITE
s dur-
ing low-voltage conditions. When V
CAP
< V
SWITCH
, 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
STORE
s 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 5
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 6 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
READ
s to
WRITE
s; 5) the operating
temperature; 6) the V
cc
level; and 7) I/O loading.
Figure 5: I
cc
(max) Reads
0
20
40
60
80
100
50
100
Cycle Time (ns)
150
200
TTL
CMOS
A
Figure 6: I
cc
(max) Writes
0
20
40
60
80
100
50
100
Cycle Time (ns)
150
200
TTL
CMOS
A
相关PDF资料 |
PDF描述 |
|---|---|
| STK22C48-P20 | DIODE TVS 13V 400W UNI 5% SMA |
| STK22C48-P25 | DIODE TVS 14V 400W BIDIR 5% SMA |
| STK22C48-P25I | DIODE TVS 150V 400W BIDIR 5% SMA |
| STK22C48-P35 | DIODE TVS 15V 400W BIDIR 5% SMA |
| STK22C48-P35I | DIODE TVS 160V 400W BIDIR 5% SMA |
相关代理商/技术参数 |
参数描述 |
|---|---|
| STK22C48-N45ITR | 制造商:SIMTEK 制造商全称:Simtek Corporation 功能描述:2Kx8 AutoStore nvSRAM |
| STK22C48-N45TR | 制造商:SIMTEK 制造商全称:Simtek Corporation 功能描述:2Kx8 AutoStore nvSRAM |
| STK22C48-NF25 | 功能描述:NVRAM 2Kbx8 4.5-5.5V AutoStore RoHS:否 制造商:Maxim Integrated 数据总线宽度:8 bit 存储容量:1024 Kbit 组织:128 K x 8 接口类型:Parallel 访问时间:70 ns 电源电压-最大:5.5 V 电源电压-最小:4.5 V 工作电流:85 mA 最大工作温度:+ 70 C 最小工作温度:0 C 封装 / 箱体:EDIP 封装:Tube |
| STK22C48-NF25I | 功能描述:NVRAM 2Kbx8 4.5-5.5V AutoStore RoHS:否 制造商:Maxim Integrated 数据总线宽度:8 bit 存储容量:1024 Kbit 组织:128 K x 8 接口类型:Parallel 访问时间:70 ns 电源电压-最大:5.5 V 电源电压-最小:4.5 V 工作电流:85 mA 最大工作温度:+ 70 C 最小工作温度:0 C 封装 / 箱体:EDIP 封装:Tube |
| STK22C48-NF25ITR | 功能描述:NVRAM 2Kbx8 4.5-5.5V AutoStore RoHS:否 制造商:Maxim Integrated 数据总线宽度:8 bit 存储容量:1024 Kbit 组织:128 K x 8 接口类型:Parallel 访问时间:70 ns 电源电压-最大:5.5 V 电源电压-最小:4.5 V 工作电流:85 mA 最大工作温度:+ 70 C 最小工作温度:0 C 封装 / 箱体:EDIP 封装:Tube |
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