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IDT54/74FCT245T/AT/CT/DT - 2245T/AT/CT, IDT54/74FCT640T/AT/CT, IDT54/74FCT645T/AT/CT/DT
FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVERS
MILITARY AND COMMERCIAL TEMPERATURE RANGES
6.9
5
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
2534 tbl 09
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
2534 tbl 10
FCT245T
FCT2245T
FCT245AT
FCT2245AT
Com'l.
Mil.
Com'l.
Mil.
Symbol
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
t
PZH
t
PZL
t
PHZ
t
PLZ
Parameter
Conditions
(1)
C
L
= 50 pF
R
L
= 500
Min.
(2)
1.5
Max.
7.0
Min
.
(2)
1.5
Max.
7.5
Min
.
(2)
1.5
Max.
4.6
Min.
(2)
1.5
Max.
4.9
Unit
ns
Propagation Delay
A to B, B to A
Output Enable Time
OE
to A or B
Output Disable Time
OE
to A or B
Output Enable Time
T/
R
to A or B
(3)
Output Disable Time
T/
R
to A or B
(3)
1.5
9.5
1.5
10.0
1.5
6.2
1.5
6.5
ns
1.5
7.5
1.5
10.0
1.5
5.0
1.5
6.0
ns
1.5
9.5
1.5
10.0
1.5
6.2
1.5
6.5
ns
1.5
7.5
1.5
10.0
1.5
5.0
1.5
6.0
ns
FCT245CT
FCT2245CT
Com'l.
Min.
(2)
Max.
1.5
4.1
FCT245DT
Mil.
Com'l.
Mil.
Symbol
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
t
PZH
t
PZL
t
PHZ
t
PLZ
Parameter
Conditions
(1)
C
L
= 50 pF
R
L
= 500
Min
.
(2)
1.5
Max.
4.5
Min
.
(2)
1.5
Max.
3.8
Min.
(2)
—
Max.
—
Unit
ns
Propagation Delay
A to B, B to A
Output Enable Time
OE
to A or B
Output Disable Time
OE
to A or B
Output Enable Time
T/
R
to A or B
(3)
Output Disable Time
T/
R
to A or B
(3)
1.5
5.8
1.5
6.2
1.5
5.0
—
—
ns
1.5
4.8
1.5
5.2
1.5
4.3
—
—
ns
1.5
5.8
1.5
6.2
1.5
5.0
—
—
ns
1.5
4.8
1.5
5.2
1.5
4.3
—
—
ns
FCT640T
FCT640AT
FCT640CT
Com'l.
Mil.
Com'l.
Mil.
Com'l.
Mil.
Symbol
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
t
PZH
t
PZL
t
PHZ
t
PLZ
NOTES:
1. See test circuit and waveforms.
2. Minimum limits are guaranteed but not tested on Propagation Delays.
3. This parameter is guaranteed but not tested.
Parameter
Conditions
(1)
Min
.
(2)
Max. Min.
(2)
Max. Min
.
(2)
Max. Min.
(2)
Max. Min.
(2)
Max. Min.
(2)
Max.
C
L
= 50 pF
R
L
= 500
2.0
13.0
2.0
16.0
1.5
Unit
ns
Propagation Delay
A to B, B to A
Output Enable Time
OE
to A or B
Output Disable Time
OE
to A or B
Output Enable Time
T/
R
to A or B
(3)
Output Disable Time
T/
R
to A or B
(3)
2.0
7.0
2.0
8.0
1.5
5.0
1.5
5.3
1.5
4.4
1.5
4.7
6.2
1.5
6.5
1.5
5.8
1.5
6.2
ns
2.0
10.0
2.0
12.0
1.5
5.0
1.5
6.0
1.5
4.8
1.5
5.2
ns
2.0
13.0
2.0
16.0
1.5
6.2
1.5
6.5
1.5
5.8
1.5
6.2
ns
2.0
10.0
2.0
12.0
1.5
5.0
1.5
6.0
1.5
4.8
1.5
5.2
ns
2534 tbl 11