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參數(shù)資料
| 型號： | FT-55U |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 英文描述： | 256K (32768 words 8 bits) SRAM Control Pins: OE and CE |
| 中文描述： | 256K（32768字8位）的SRAM控制引腳：OE和行政長官 |
| 文件頁數(shù)： | 4/7頁 |
| 文件大?。?/td> | 49K |
| 代理商： | FT-55U |
No. 6302-4/7
LC35256FM, FT-55U/70U
DC Electrical Characteristics
at Ta = –40 to +85°C, V
CC
= 4.5 to 5.5 V
Parameter
Symbol
Conditions
Ratings
Unit
min
typ
*
max
Input leakage current
I
LI
V
IN
= 0 to V
CC
V
CE
= V
IH
or V
OE
= V
IH
or V
WE
= V
IL
,
V
I/O
= 0 to V
CC
I
OH
= –1.0 mA
I
OL
= 2.0 mA
V
CE
= V
IL
, I
I/O
= 0 mA, V
IN
= V
IH
or V
IL
–1.0
+1.0
μA
Output leakage current
I
LO
–1.0
+1.0
μA
Output high-level voltage
V
OH
V
OL
I
CCA2
2.4
V
Output low-level voltage
0.4
V
5.0
mA
Operating current drain
LC35256FM, FT-55U
40
45
I
CCA3
LC35256FM, FT-70U
35
40
mA
1 μs cycle
3.5
6.0
Ta
≤
25°C
Ta
≤
60°C
Ta
≤
70°C
Ta
≤
85°C
0.05
Standby mode
I
CCS1
1.5
μA
current drain
3.0
5.0
I
CCS2
V
CE
= V
IH
, V
IN
= 0 to V
CC
1.0
mA
Note:
*
Reference values when V
CC
= 5 V and Ta = 25°C.
TTL inputs
V
CE
≥
V
CC
– 0.2 V,
V
IN
= 0 to V
CC
V
CC
– 0.2 V/
0.2 V inputs
TTL inputs
AC Electrical Characteristics
at Ta = –40 to +85°C, V
CC
= 4.5 to 5.5 V
AC test conditions
Input pulse voltage levels: V
IH
= 2.4 V
,
V
IL
= 0.6 V
Input rise and fall times: 5 ns
Input and output timing levels: 1.5 V
Output load: 30 pF + 1 TTL gate (including the jig capacitance)
LC35256FM, FT
Parameter
Symbol
-55U
-70U
Unit
min
max
min
max
Read cycle time
t
RC
t
AA
t
CA
t
OA
t
OH
t
COE
t
OOE
t
COD
t
OOD
55
70
ns
Address access time
55
70
ns
CE access time
55
70
ns
OE access time
30
35
ns
Output hold time
10
10
ns
CE output enable time
5
10
ns
OE output enable time
5
5
ns
CE output disable time
20
30
ns
OE output disable time
20
25
ns
Read Cycle
Write Cycle
V
CE
= V
IL
, V
IN
= V
IH
or V
IL
, I
I/O
= 0 mA,
Duty 100 %
Min.
cycle
LC35256FM, FT
Parameter
Symbol
-55U
-70U
Unit
min
max
min
max
Write cycle time
t
WC
t
AS
t
WP
t
CW
t
WR
t
WR1
t
DS
t
DH
t
DH1
t
WOE
t
WOD
55
70
ns
Address setup time
0
0
ns
Write pulse width
40
50
ns
CE setup time
50
60
ns
Write recovery time
0
0
ns
CE write recovery time
0
0
ns
Data setup time
25
30
ns
Data hold time
0
0
ns
CE data hold time
0
0
ns
WE output enable time
5
5
ns
WE output disable time
20
30
ns
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