IDT54/74FCT245T/AT/CT
FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVER
MILITARY AND INDUSTRIAL TEMPERATURE RANGES
IDT54/74FCT245T/AT/CT
FAST CMOS OCTAL
BIDIRECTIONAL
TRANSCEIVER
FEATURES:
DESCRIPTION:
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The IDT octal bidirectional transceivers are built using an advanced dual
metal CMOS technology. The FCT245T is designed for asynchronous twoway communication between data buses. The transmit/receive (T/R) input
determines the direction of data flow through the bidirectional transceiver.
Transmit (active high) enables data from A ports to B ports, and receive
(active low) from B ports to A ports. The output enable (OE) input, when
high, disables both A and B ports by placing them in high Z condition.
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Std., A, and C grades
Low input and output leakage ≤1µA (max.)
CMOS power levels
True TTL input and output compatibility:
– VOH = 3.3V (typ.)
– VOL = 0.3V (typ.)
High Drive outputs (-15mA IOH, 64mA IOL)
Meets or exceeds JEDEC standard 18 specifications
Military product compliant to MIL-STD-883, Class B and DESC
listed (dual marked)
Power off disable outputs permit "live insertion"
Available in the following packages:
– Industrial: SOIC, SSOP, QSOP, TSSOP
– Military: CERDIP, LCC
FUNCTIONAL BLOCK DIAGRAM
T/R
OE
A0
B0
A1
B1
A2
B2
A3
B3
A4
B4
A5
B5
A6
B6
A7
B7
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
MILITARY AND INDUSTRIAL TEMPERATURE RANGES
OCTOBER 2008
1
© 2006 Integrated Device Technology, Inc.
DSC-5510/5
IDT54/74FCT245T/AT/CT
FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVER
MILITARY AND INDUSTRIAL TEMPERATURE RANGES
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified:
Industrial: TA = –40°C to +85°C, VCC = 5.0V ±5%; Military: TA = –55°C to +125°C, VCC = 5.0V ±10%
Symbol
Test Conditions(1)
Parameter
Min.
Typ.(2)
Max.
Unit
VIH
Input HIGH Level
Guaranteed Logic HIGH Level
2
—
—
V
VIL
Input LOW Level
Guaranteed Logic LOW Level
—
—
0.8
V
IIH
Input HIGH Current(4)
VCC = Max.
VI = 2.7V
—
—
±1
µA
IIL
Input LOW Current(4)
VCC = Max.
VI = 0.5V
—
—
±1
µA
IOZH
High Impedance Output Current
VCC = Max
VO = 2.7V
—
—
±1
µA
IOZL
(3-State output pins)(4)
VO = 0.5V
—
—
±1
II
VIK
VH
Input HIGH Current(4)
Clamp Diode Voltage
Input Hysteresis
VCC = Max., VI = VCC (Max.)
VCC = Min, IIN = -18mA
—
—
—
—
–0.7
200
±1
–1.2
—
µA
V
mV
ICC
Quiescent Power Supply Current
VCC = Max., VIN = GND or VCC
—
0.01
1
mA
Min.
2.4
Typ.(2)
3.3
Max.
—
Unit
2
3
—
—
0.3
0.55
V
–60
–120
–225
mA
—
OUTPUT DRIVE CHARACTERISTICS
Symbol
VOH
Parameter
Output HIGH Voltage
VOL
Output LOW Voltage
IOS
Short Circuit Current
Test Conditions(1)
VCC = Min
IOH = –6mA MIL
IOH = –8mA IND
VIN = VIH or VIL
IOH = –12mA MIL
IOH = –15mA IND
VCC = Min
IOL = 48mA MIL
VIN = VIH or VIL
IOL = 64mA IND
VCC = Max., VO = GND(3)
V
NOTES:
1. For conditions shown as Min. or Max., 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 tested at one time. Duration of the test should not exceed one second.
4. The test limit for this parameter is ±5µA at TA = –55°C.
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