IDT74FCT646 데이터 시트보기 (PDF) - Integrated Device Technology
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IDT74FCT646 Datasheet PDF : 8 Pages
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IDT54/74FCT646/A/C
FAST CMOS OCTAL TRANSCEIVER/REGISTER
MILITARY AND COMMERCIAL TEMPERATURE RANGES
POWER SUPPLY CHARACTERISTICS
VLC = 0.2V; VHC = VCC – 0.2V
Symbol
Parameter
Test Conditions(1)
ICC
Quiescent Power Supply Current VCC = Max.
VIN ≥ VHC; VIN ≤ VLC
∆ICC
ICCD
IC
Quiescent Power Supply Current
TTL Inputs HIGH
Dynamic Power Supply Current(4)
Total Power Supply Current(6)
VCC = Max.
VIN = 3.4V(3)
VCC = Max.
Outputs Open
G = DIR = GND
One Input Toggling
50% Duty Cycle
VCC = Max.
Outputs Open
fCP = 10MHz
50% Duty Cycle
G = DIR = GND
One Bit Toggling
at fi = 5MHz
50% Duty Cycle
VIN ≥ VHC
VIN ≤ VLC
VIN ≥ VHC
VIN ≤ VLC
(FCT)
VIN = 3.4V
VIN = GND
VCC = Max.
Outputs Open
fCP = 10MHz
50% Duty Cycle
G = DIR = GND
Eight Bits Toggling
at fi = 5MHz
50% Duty Cycle
VIN ≥ VHC
VIN ≤ VLC
(FCT)
VIN = 3.4V
VIN = GND
Min.
—
Typ.(2)
0.2
Max.
1.5
Unit
mA
—
0.5
2.0
mA
—
0.15 0.25 mA/MHz
—
1.7
4.0
mA
—
2.2
6.0
—
7.0
12.8(5)
—
9.2
21.8(5)
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 Output 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.
2536 tbl 06
7.18
5
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