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參數(shù)資料
| 型號(hào)： | STK16C68-W20I |
| 廠商： | Electronic Theatre Controls, Inc. |
| 元件分類： | DRAM |
| 英文描述： | 8K x 8 AutoStorePlus⑩ nvSRAM QuantumTrap⑩ CMOS Nonvolatile Static RAM |
| 中文描述： | 8K的× 8 AutoStorePlus⑩⑩非易失QuantumTrap的CMOS非易失性靜態(tài)隨機(jī)存儲(chǔ)器 |
| 文件頁(yè)數(shù)： | 8/9頁(yè) |
| 文件大小： | 99K |
| 代理商： | STK16C68-W20I |
STK16C68
July 1999
4-80
1.
2.
3.
4.
5.
6.
Read address
Read address
Read address
Read address
Read address
Read address
0000 (hex)
1555 (hex)
0AAA (hex)
1FFF (hex)
10F0 (hex)
0F0F (hex)
Valid READ
Valid READ
Valid READ
Valid READ
Valid READ
Initiate
STORE
cycle
The software sequence must be clocked with E
controlled
READ
s.
Once the sixth address in the sequence has been
entered, the
STORE
cycle will commence and the
chip will be disabled. It is important that
READ
cycles and not
WRITE
cycles be used in the
sequence, although it is not necessary that G be
low for the sequence to be valid. After the t
STORE
cycle time has been fulfilled, the
SRAM
will again be
activated for
READ
and
WRITE
operation.
SOFTWARE NONVOLATILE
RECALL
A software
RECALL
cycle is initiated with a
sequence of
READ
operations in a manner similar
to the software
STORE
initiation. To initiate the
RECALL
cycle, the following sequence of
READ
operations must be performed:
1.
2.
3.
4.
5.
6.
Read address
Read address
Read address
Read address
Read address
Read address
0000 (hex)
1555 (hex)
0AAA (hex)
1FFF (hex)
10F0 (hex)
0F0E (hex)
Valid READ
Valid READ
Valid READ
Valid READ
Valid READ
Initiate
RECALL
cycle
Internally,
RECALL
is a two-step procedure. First,
the
SRAM
data is cleared, and second, the nonvola-
tile information is transferred into the
SRAM
cells.
After the t
RECALL
cycle time the
SRAM
will once again
be ready for
READ
and
WRITE
operations. The
RECALL
operation in no way alters the data in the
EEPROM
cells. The nonvolatile data can be recalled
an unlimited number of times.
HARDWARE PROTECT
The STK16C68 offers hardware protection against
inadvertent
STORE
operation and
SRAM WRITE
s
during low-voltage conditions. When V
CC
< V
SWITCH
,
software
STORE
operations and
SRAM WRITE
s are
inhibited.
LOW AVERAGE ACTIVE POWER
The STK16C68 draws significantly less current
when it is cycled at times longer than 50ns. Figure 2
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 3 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 cur-
rent drawn by the STK16C68 depends on the fol-
lowing 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 2: I
CC
(max) Reads
0
20
40
60
80
100
50
100
Cycle Time (ns)
150
200
TTL
CMOS
A
Figure 3: I
CC
(max) Writes
0
20
40
60
80
100
50
100
Cycle Time (ns)
150
200
TTL
CMOS
A
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| STK16C88-3WF35 | 功能描述:NVRAM 32Kbx8 3.0-3.6V AutoStorePlus RoHS:否 制造商:Maxim Integrated 數(shù)據(jù)總線寬度:8 bit 存儲(chǔ)容量:1024 Kbit 組織:128 K x 8 接口類型:Parallel 訪問(wèn)時(shí)間:70 ns 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 工作電流:85 mA 最大工作溫度:+ 70 C 最小工作溫度:0 C 封裝 / 箱體:EDIP 封裝:Tube |
| STK16C88-3WF35I | 功能描述:NVRAM 32Kbx8 3.0-3.6V AutoStorePlus RoHS:否 制造商:Maxim Integrated 數(shù)據(jù)總線寬度:8 bit 存儲(chǔ)容量:1024 Kbit 組織:128 K x 8 接口類型:Parallel 訪問(wèn)時(shí)間:70 ns 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 工作電流:85 mA 最大工作溫度:+ 70 C 最小工作溫度:0 C 封裝 / 箱體:EDIP 封裝:Tube |
| STK16C88-3WF35ITR | 制造商:Cypress Semiconductor 功能描述:STK16C88-3WF35ITR - Tape and Reel |
| STK16C88-3WF35TR | 制造商:Cypress Semiconductor 功能描述:STK16C88-3WF35TR - Tape and Reel |
| STK16C88-WF25 | 功能描述:NVRAM 32Kbx8 4.5-5.5V AutoStorePlus RoHS:否 制造商:Maxim Integrated 數(shù)據(jù)總線寬度:8 bit 存儲(chǔ)容量:1024 Kbit 組織:128 K x 8 接口類型:Parallel 訪問(wèn)時(shí)間:70 ns 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 工作電流:85 mA 最大工作溫度:+ 70 C 最小工作溫度:0 C 封裝 / 箱體:EDIP 封裝:Tube |
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