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參數(shù)資料
| 型號： | DC74HC259 |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | FPGA, 12K LUTS, 93 I/O,DSP,144TQFP; Logic IC family:ECP2; Logic IC function:FPGA; Voltage, supply:1.2V; Case style:TQFP; Base number:2; I/O lines, No. of:93; Logic function number:LFE2-12E; Pins, No. of:144; Temp, op. max:85(degree RoHS Compliant: Yes |
| 中文描述： | 高速CMOS邏輯8位可尋址鎖存器 |
| 文件頁數(shù)： | 2/9頁 |
| 文件大?。?/td> | 62K |
| 代理商： | DC74HC259 |
2
Functional Diagram
1
2
3
14
15
13
4
5
6
7
10
12
11
9
Q0
Q1
Q2
Q3
Q4
Q5
Q6
Q7
MR
LE
8
LATCHES
1-OF-8
DECODER
D
A
2
A
1
A
0
GND = 8
V
CC
= 16
TRUTH TABLE
INPUTS
OUTPUT OF
ADDRESS
LATCH
EACH OTHER
OUTPUT
FUNCTION
MR
LE
H
L
D
Q
io
Addressable
Latch
H
H
Q
io
Q
io
Memory
L
L
D
L
8-Line
Demultiplexer
L
H
L
L
Reset
NOTE:
H
L
D
Q
io
= The level of Q
i
(i = 0, 1...7, as appropriate) before the indicated
steady-state input conditions were established.
= High Voltage Level
= Low Voltage Level
= The level at the data input
LATCH SELECTION TABLE
SELECT INPUTS
LATCH
ADDRESSED
A2
A1
A0
L
L
L
0
L
L
H
1
L
H
L
2
L
H
H
3
H
L
L
4
H
L
H
5
H
H
L
6
H
H
H
7
CD74HC259, CD74HCT259
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