
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
3
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified:
Commercial: T
A
 = 0
°
C to +70
°
C, V
CC
 = 5.0V 
±
 5%; Military: T
A
 = –55
°
C to +125
°
C, V
CC
 = 5.0V 
±
 10%
Symbol
V
IH
Parameter
Test Conditions
(1)
Min.
2.0
Typ.
(2)
—
Max.
—
Unit
V
Input HIGH Level
Guaranteed Logic HIGH Level
V
IL
I
I H
I
I L
Input LOW Level
Input HIGH Current
(4)
Input LOW Current
(4)
Guaranteed Logic LOW Level
V
CC
 = Max.
—
—
—
—
—
—
0.8
±
1
±
1
±
1
±
1
±
1
–1.2
—
1
V
μ
A
V
I
 = 2.7V
V
I
 = 0.5V
I
OZH
I
OZL
I
I 
High Impedance Output Current
(3-State Output pins)
(4)
Input HIGH Current
(4)
V
CC
 = Max.
V
O 
= 2.7V
V
O
 = 0.5V
—
—
—
—
—
—
μ
A
V
CC
 = Max., V
I 
= V
CC 
(Max.)
μ
A
V
mV
mA
V
IK
V
H
I
CC
Clamp Diode Voltage
Input Hysteresis
Quiescent Power Supply Current
V
CC
 = Min., I
IN  
= –18mA
—
—
—
–0.7
200
0.01
                                         —
V
CC
 = Max., V
IN
 = GND or V
CC
OUTPUT DRIVE CHARACTERISTICS FOR FCT245T/640T/645T
Symbol
V
OH
Parameter
Test Conditions
(1)
Min.
2.4
Typ.
(2)
3.3
Max.
—
Unit
V
Output HIGH Voltage
V
CC
 = Min.
V
IN
 = V
IH 
or V
IL
I
OH
 = –6mA MIL.
I
OH
 = –8mA COM'L.  
I
OH
 = –12mA MIL.
I
OH
 = –15mA COM'L.
I
OL 
= 48mA MIL.
I
OL 
= 64mA COM'L.
2.0
3.0
—
V
V
OL
Output LOW Voltage
V
CC
 = Min.
V
IN
 = V
IH 
or V
IL
V
CC
 = Max., V
O
 = GND
(3)
—
0.3
0.55
V
I
OS
Short Circuit Current
–60
–120
–225
mA
OUTPUT DRIVE CHARACTERISTICS FOR FCT2245T
Symbol
I
ODL
Parameter
Test Conditions
(1)
Min.
16
Typ.
(2)
48
Max.
—
Unit
mA
Output LOW Current
V
CC
 = 5V, V
IN 
= V
IH 
or
V
IL,  
V
OUT 
= 1.5V
(3)
V
CC
 = 5V, V
IN 
= V
IH 
or V
    IL,
 V
OUT 
= 1.5V
(3)
V
CC
 = Min.
V
IN
 = V
IH 
or 
V
IL
V
CC
 = Min.
V
IN
 = V
IH 
or V
IL
I
ODH
V
OH
Output HIGH Current
Output HIGH Voltage
–16
2.4
–48
3.3
—
—
mA
V
I
OH
 = –12mA MIL.
I
OH
 = –15mA COM'L.
I
OL
 = 12mA
V
OL
Output LOW Voltage
—
0.3
0.50
V
2539 lnk 05
2539 lnk 06
2539 lnk 07
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 Vcc = 5.0V, +25
°
C ambient.
3. Not more than one output should be shorted at one time.  Duration of the short circuit test should not exceed one second.
4. The test limit for this parameter is 
±
5
μ
A at T
A
 = –55
°
C.