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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)： | 3/7頁 |
| 文件大?。?/td> | 49K |
| 代理商： | FT-55U |
Pin Functions
No. 6302-3/7
LC35256FM, FT-55U/70U
A0 to A14
Address input
WE
Read/write control input
OE
Output enable input
CE
Chip enable input
I/O1 to I/O8
Data I/O
V
CC
, GND
Power supply, ground
Function Table
Mode
CE
OE
WE
I/O
Supply current
Read cycle
L
L
H
Data output
I
CCA
I
CCA
I
CCA
I
CCS
Write cycle
L
X
L
Data input
Output disable
L
H
H
High impedance
Unselected
H
X
X
High impedance
Parameter
Symbol
Conditions
Ratings
Unit
Maximum supply voltage
V
CC
max
V
IN
V
I/O
Topr
7.0
V
Input pin voltage
–0.3
*
to V
CC
+ 0.3
–0.3 to V
CC
+ 0.3
–40 to +85
V
I/O pin voltage
V
Operating temperature
°C
Storage temperature
Tstg
–55 to +125
°C
Specifications
Absolute Maximum Ratings
Note:
*
The minimum value is –3.0 V for pulse widths under 30 ns.
I/O Capacitances
at Ta = 25°C, f = 1 MHz
Parameter
Symbol
Conditions
Ratings
Unit
min
typ
max
I/O pin capacitance
C
I/O
C
I
V
I/O
= 0 V
V
IN
= 0 V
6
10
pF
Input pin capacitance
6
10
pF
Note: All units are not tested; only samples are tested.
DC Allowable Operating Ranges
at Ta = –40 to +85°C, V
CC
= 4.5 to 5.5 V
Parameter
Symbol
Conditions
Ratings
Unit
min
typ
max
Supply voltage
V
CC
V
IH
V
IL
4.5
5.0
5.5
V
Input voltage
2.2
V
CC
+ 0.3
+0.8
V
–0.3
*
V
Note:
*
The minimum value is –3.0 V for pulse widths under 30 ns.
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