參數(shù)資料
型號(hào)： IDT74FCT621TDG
廠商： INTEGRATED DEVICE TECHNOLOGY INC
元件分類： 總線收發(fā)器
英文描述： FCT SERIES, 8-BIT TRANSCEIVER, TRUE OUTPUT, CDIP20
封裝： CERDIP-20
文件頁(yè)數(shù)： 4/6頁(yè)
文件大?。?/td> 121K
代理商： IDT74FCT621TDG
4
MILITARYANDCOMMERCIALTEMPERATURERANGES
IDT54/74FCT621T/AT
FAST CMOS OCTAL BUS TRANSCEIVER (OPEN DRAIN)
POWER SUPPLY CHARACTERISTICS
Symbol
Parameter
Test Conditions(1)
Min.
Typ.(2)
Max.
Unit
ICC
Quiescent Power Supply Current
VCC = Max.
—
0.5
2
mA
TTL Inputs HIGH
VIN = 3.4V
(3)
ICCD
Dynamic Power Supply Current
(4)
Vcc = Max.
VIN = VCC
—
0.15
0.25
mA/MHz
OutputsOpen
VIN = GND
GBA = GAB = GND or VCC
OneInputToggling
50% Duty Cycle
IC
Total Power Supply Current
(6,7)
Vcc = Max.
VIN = VCC
—
1.5
3.5
mA
OutputsOpen
VIN = GND
GBA = GAB = GND or VCC
One Bit Toggling
VIN = 3.4V
—
1.8
4.5
at fi =10MHz
VIN = GND
50% Duty Cycle
Vcc = Max.
VIN = VCC
—3
6
(5)
OutputsOpen
VIN = GND
GBA = GAB = GND or VCC
EightBitsToggling
VIN = 3.4V
—
5
14.0
(5)
at fi = 2.5MHz
VIN = GND
50% Duty Cycle
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.
7. This test is performed with outputs tied to GND through a pull-down resistor.
IDT54/74FCT621T
IDT54/74FCT621AT
Com’l.
Mil.
Com’l.
Mil.
Symbol
Parameter
Condition(1)
Min.(2)
Max.
Min.(2)
Max.
Min.(2)
Max.
Min.(2)
Max.
Unit
tPLH
Propagation Delay A to B
CL = 50pF
5.5
13
5.5
13.5
5.5
12
5.5
12.5
ns
tPHL
RL = 500
1.5
8.5
1.5
9.5
1.5
6.8
1.5
7.6
tPLH
Propagation Delay B to A
5.5
12.5
5.5
13
5.5
12
5.5
12.5
ns
tPHL
1.5
8
1.5
9
1.5
6.4
1.5
7.2
tPLH
Propagation Delay
GBA to A
5.5
14
5.5
14.5
5.5
13
5.5
13.5
ns
tPHL
1.5
8.5
1.5
9.5
1.5
6.8
1.5
7.6
tPLH
Propagation Delay GAB to B
5.5
14
5.5
14.5
5.5
13
5.5
13.5
ns
tPHL
1.5
8
1.5
9
1.5
6.4
1.5
7.2
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
NOTES:
1. See test circuit and waveforms.
2. Minimum limits are guaranteed but not tested on Propagation Delays.
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