![](http://datasheet.mmic.net.cn/330000/IDT54FCT623TLB_datasheet_16402015/IDT54FCT623TLB_4.png)
MILITARY AND COMMERCIAL TEMPERATURE RANGES
IDT54/74FCT623T/AT/CT
FAST CMOS OCTAL BUS TRANSCEIVERS (3-STATE)
6.19
4
POWER SUPPLY CHARACTERISTICS
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
CP/
2 + f
i
N
i
)
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
CP
= Clock Frequency for Register Devices (Zero for Non-Register Devices)
f
i
= Input Frequency
N
i
= Number of Inputs at f
i
All currents are in milliamps and all frequencies are in megahertz.
2563 tbl 07
Symbol
Parameter
Test Conditions
(1)
Min.
Typ.
(2)
Max.
Unit
I
CC
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
G
BA = GAB = GND
One Input Toggling
50% Duty Cycle
V
CC
= Max.
Outputs Open
fi = 10MHz
50% Duty Cycle
G
BA = GAB = GND
One Bit Toggling
V
CC
= Max.
Outputs Open
fi = 2.5MHz
50% Duty Cycle
G
BA = GAB = GND
Eight Bits Toggling
—
0.5
2.0
mA
I
CCD
V
IN
= V
CC
V
IN
= GND
—
0.15
0.25
mA/
MHz
I
C
Total Power Supply Current
(6)
V
IN
= V
CC
V
IN
= GND
—
1.5
3.5
mA
V
IN
= 3.4V
V
IN
= GND
—
1.8
4.5
V
IN
= V
CC
V
IN
= GND
—
3.0
6.0
(5)
V
IN
= 3.4V
V
IN
= GND
—
5.0
14.0
(5)
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
NOTES:
1. See test circuit and waveforms.
2. Minimum limits are guaranteed but not tested on Propagation Delays
2563 tbl 07
54/74FCT623T
Com'l.
54/74FCT623AT
Com'l.
54/74FCT623CT
Com'l.
Mil.
Mil.
Mil.
Symbol
t
PLH
t
PHL
Parameter
Condition
(1)
C
L
= 50pF
R
L
= 500
Min.
(2)
Max. Min.
(2)
Max. Min.
(2)
Max. Min.
(2)
Max. Min.
(2)
Max. Min.
(2)
Max.
Unit
Propagation Delay
An to Bn
1.5
7.5
1.5
9.0
1.5
5.5
1.5
6.3
1.5
4.8
1.5
5.4
ns
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
t
PZH
t
PZL
t
PHZ
t
PLZ
Propagation Delay
Bn to An
Output Enable Time
G
BA to An
Output Disable Time
G
BA to An
Output Enable Time
GAB to Bn
Output Disable Time
GAB to Bn
1.5
7.5
1.5
9.5
1.5
5.5
1.5
6.3
1.5
4.8
1.5
5.4
ns
1.5
9.0
1.5
10.0
1.5
7.0
1.5
8.0
1.5
6.1
1.5
6.9
ns
1.5
8.0
1.5
9.0
1.5
6.5
1.5
7.4
1.5
5.6
1.5
6.4
ns
1.5
9.0
1.5
10.5
1.5
7.0
1.5
8.0
1.5
6.1
1.5
6.9
ns
1.5
8.0
1.5
9.0
1.5
6.5
1.5
7.4
1.5
5.6
1.5
6.4
ns