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| 型號： | IDT74FCT139TDB |
| 廠商： | Integrated Device Technology, Inc. |
| 元件分類： | 通用總線功能 |
| 英文描述： | FAST CMOS DUAL 1-OF-4 DECODER WITH ENABLE |
| 中文描述： | 有“使能”的快速CMOS雙1到4譯碼器 |
| 文件頁數(shù)： | 3/5頁 |
| 文件大小： | 103K |
| 代理商： | IDT74FCT139TDB |
IDT54/74FCT139T/AT/CT
FAST CMOS DUAL 1-OF-4 DECODER WITH ENABLE
MILITARY AND COMMERCIAL TEMPERATURE RANGES
6.4
3
POWER SUPPLY CHARACTERISTICS
Symbol
I
CC
Parameter
Test Conditions
(1)
Min.
—
Typ.
(2)
0.5
Max.
2.0
Unit
mA
Quiescent Power Supply Current
TTL Inputs HIGH
Dynamic Power Supply
Current
(4)
V
CC
= Max.
V
IN
= 3.4V
(3)
V
CC
= Max.
Outputs Open
One Bit Toggling
50% Duty Cycle
V
CC
= Max.
Outputs Open
f
o
= 10MHz
50% Duty Cycle
One Input and
One Output Toggling
V
CC
= Max.
Outputs Open
f
o
= 10MHz
50% Duty Cycle
One Input Toggling
on Each Decoder
Two Outputs Toggling
I
CCD
V
IN
= V
CC
V
IN
= GND
—
0.15
0.3
mA/
MHz
I
C
Total Power Supply Current
(6)
V
IN
= V
CC
V
IN
= GND
—
1.5
4.0
mA
V
IN
= 3.4V
V
IN
= GND
—
1.8
5.0
V
IN
= V
CC
V
IN
= GND
—
3.0
7.0
(5)
V
IN
= 3.4V
V
IN
= GND
—
3.5
9.0
(5)
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
NOTES:
1. See test circuit and waveforms.
2. Minimum limits are guaranteed but not tested on Propagation Delays.
2566 tbl 07
2566 tbl 06
NOTES:
1. For conditions shown as Max. or Min., use appropriate value specified under Electrical Characteristics for the applicable device type.
2. Typical values are at V
CC
= 5.0V, +25
°
C ambient.
3. Per TTL driven input (V
IN
= 3.4V). All other inputs at V
CC
or GND.
4. This parameter is not directly testable, but is derived for use in Total Power Supply Calculations.
5. Values for these conditions are examples of the I
CC
formula. These limits are guaranteed but not tested.
6. I
C
= I
QUIESCENT
+ I
INPUTS
+ I
DYNAMIC
I
C
= I
CC
+
I
CC
D
H
N
T
+ I
CCD
(f
O
N
O
)
I
CC
= Quiescent Current
I
CC
= Power Supply Current for a TTL High Input (V
IN
= 3.4V)
D
H
= Duty Cycle for TTL Inputs High
N
T
= Number of TTL Inputs at D
H
I
CCD
= Dynamic Current Caused by an Input Transition Pair (HLH or LHL)
f
O
= Output Frequency
N
O
= Number of Outputs at f
O
All currents are in milliamps and all frequencies are in megahertz.
FCT139T
FCT139AT
FCT139CT
Com'l.
Mil.
Com'l.
Mil.
Com'l.
Mil.
Parameter
t
PLH
t
PHL
t
PLH
t
PHL
Description
Condition
(1)
C
L
= 50pF
R
L
= 500
Min.
(2)
1.5
Max.
9.0
Min.
(2)
1.5
Max.
12.0
Min.
(2)
1.5
Max.
5.9
Min.
(2)
1.5
Max.
7.8
Min.
(2)
1.5
Max.
5.0
Min.
(2)
1.5
Max.
6.2
Unit
ns
Propagation Delay
A
0
or A
1
to
O
n
Propagation Delay
E
to
O
n
1.5
8.0
1.5
9.0
1.5
5.5
1.5
7.2
1.5
4.8
1.5
5.8
ns
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