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IDT74FCT645T Datasheet(PDF) 4 Page - Integrated Device Technology

Part No. IDT74FCT645T
Description  FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVER
Download  6 Pages
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Maker  IDT [Integrated Device Technology]
Homepage  http://www.idt.com
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IDT74FCT645T Datasheet(HTML) 4 Page - Integrated Device Technology

   
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INDUSTRIALTEMPERATURERANGE
IDT74FCT645T/AT/CT/DT
FASTCMOSOCTALBIDIRECTIONALTRANSCEIVER
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.
POWER SUPPLY CHARACTERISTICS
Symbol
Parameter
Test Conditions(1)
Min.
Typ.(2)
Max.
Unit
∆ICC
Quiescent Power Supply Current
TTL Inputs HIGH
VCC = Max.
VIN = 3.4V(3)
—0.5
2
mA
ICCD
Dynamic Power Supply Current(4)
VCC = Max.
Outputs Open
VIN = VCC
VIN = GND
0.15
0.25
mA/
MHz
OE = T/R = GND
One Input Toggling
50% Duty Cycle
IC
Total Power Supply Current(6)
VCC = Max.
VIN = VCC
—1.5
3.5
mA
Outputs Open
fi = 10MHz
VIN = GND
50% Duty Cycle
VIN = 3.4
1.8
4.5
OE = T/R = GND
One Bit Toggling
VIN = GND
VCC = Max.
VIN = VCC
—3
6(5)
Outputs Open
fi = 2.5MHz
VIN = GND
50% Duty Cycle
VIN = 3.4
5
14(5)
OE = T/R = GND
Eight Bits Toggling
VIN = GND
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. Per TTL driven input (VIN = 3.4V). All other inputs at VCC 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 ICC formula. These limits are guaranteed but not tested.
6. IC = IQUIESCENT + IINPUTS + IDYNAMIC
IC = ICC +
∆ICC DHNT + ICCD (fCP/2 + fiNi)
ICC = Quiescent Current
∆ICC = Power Supply Current for a TTL High Input (VIN = 3.4V)
DH = Duty Cycle for TTL Inputs High
NT = Number of TTL Inputs at DH
ICCD = Dynamic Current Caused by an Input Transition Pair (HLH or LHL)
fCP = Clock Frequency for Register Devices (Zero for Non-Register Devices)
fi = Input Frequency
Ni = Number of Inputs at fi
All currents are in milliamps and all frequencies are in megahertz.
SWITCHING CHARACTRISTICS OVER OPERATING RANGE
FCT645T
FCT645AT
FCT645CT
FCT645DT
Symbol
Parameter
Conditions(1)
Min.(2)
Max.
Min.(2)
Max.
Min.(2)
Max.
Min.(2)
Max.
Unit
tPLH
tPHL
Propagation Delay
A to B, B to A
CL = 50 pF
RL = 500
1.5
9.5
1.5
4.6
1.5
4.1
1.5
3.8
ns
tPZH
tPZL
Output Enable Time
OE to A or B
1.5
11
1.5
6.2
1.5
5.8
1.5
5
ns
tPHZ
tPLZ
Output Disable Time
OE to A or B
1.5
12
1.5
5
1.5
4.8
1.5
4.3
ns
tPZH
tPZL
Output Enable Time
T/
R to A or B(3)
1.5
11
1.5
6.2
1.5
5.8
1.5
5
ns
tPHZ
tPLZ
Output Disable Time
T/
R to A or B(3)
1.5
12
1.5
5
1.5
4.8
1.5
4.3
ns


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