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参数资料
| 型号： | STK22C48-S35 |
| 英文描述： | DIODE TVS 20V 400W BIDIR 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-S35 |
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-S35I | NVRAM (EEPROM Based) |
| STK22C48-S45 | NVRAM (EEPROM Based) |
| STK22C48-S45I | NVRAM (EEPROM Based) |
| STK22C48-W20 | NVRAM (EEPROM Based) |
| STK22C48-W25 | NVRAM (EEPROM Based) |
相关代理商/技术参数 |
参数描述 |
|---|---|
| STK22C48S35I | 制造商:未知厂家 制造商全称:未知厂家 功能描述:2K x 8 AutoStore⑩ nvSRAM QuantumTrap⑩ CMOS Nonvolatile Static RAM |
| STK22C48-S35I | 制造商:未知厂家 制造商全称:未知厂家 功能描述:NVRAM (EEPROM Based) |
| STK22C48S45 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:2K x 8 AutoStore⑩ nvSRAM QuantumTrap⑩ CMOS Nonvolatile Static RAM |
| STK22C48-S45 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:NVRAM (EEPROM Based) |
| STK22C48S45I | 制造商:未知厂家 制造商全称:未知厂家 功能描述:2K x 8 AutoStore⑩ nvSRAM QuantumTrap⑩ CMOS Nonvolatile Static RAM |
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