参数资料
型号: IDT74FCT244CTPGG8
厂商: IDT, Integrated Device Technology Inc
文件页数: 4/6页
文件大小: 0K
描述: IC BUFF/DVR DUAL N-INV 20TSSOP
标准包装: 3,000
系列: 74FCT
逻辑类型: 缓冲器/线路驱动器,非反相
元件数: 2
每个元件的位元数: 4
输出电流高,低: 8mA,64mA
电源电压: 4.75 V ~ 5.25 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 20-TSSOP(0.173",4.40mm 宽)
供应商设备封装: 20-TSSOP
包装: 带卷 (TR)
其它名称: 74FCT244CTPGG8
MILITARYANDINDUSTRIALTEMPERATURERANGES
4
IDT54/74FCT244T/AT/CT
FASTCMOSOCTALBUFFER/LINEDRIVER
Symbol
Parameter
Test Conditions(1)
Min.
Typ.(2)
Max.
Unit
ΔICC
Quiescent Power Supply Current
VCC = Max.
0.5
2
mA
TTL Inputs HIGH
VIN = 3.4V(3)
ICCD
Dynamic Power Supply
VCC = Max.
VIN = VCC
0.15
0.25
mA/
Current(4)
Outputs Open
VIN = GND
MHz
OEA
= OEB = GND
One Input Toggling
50% Duty Cycle
IC
Total Power Supply Current(6)
VCC = Max.
VIN = VCC
1.5
3.5
mA
Outputs Open
VIN = GND
fi = 10MHz
50% Duty Cycle
VIN = 3.4V
1.8
4.5
OEA
= OEB = GND
VIN = GND
One Bit Toggling
VCC = Max.
VIN = VCC
—3
6(5)
Outputs Open
VIN = GND
fi = 2.5MHz
50% Duty Cycle
VIN = 3.4V
5
14(5)
OEA = OEB = GND
VIN = GND
Eight Bits Toggling
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. 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
ΔICC formula. These limits are guaranteed but not tested.
6. IC = IQUIESCENT + IINPUTS + IDYNAMIC
IC = ICC +
ΔICC DHNT + ICCD (fCP/2+ fiNi)
ICC = Quiescent Current
ΔICC = 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 = Output Frequency
Ni = Number of Outputs at fi
All currents are in milliamps and all frequencies are in megahertz.
POWER SUPPLY CHARACTERISTICS
NOTES:
1. See test circuit and waveforms.
2. Minimum limits are guaranteed but not tested on Propagation Delays.
54FCT244T
54/74FCT244AT
54/74FCT244CT
Mil.
Ind.
Mil.
Ind.
Mil.
Symbol
Parameter
Condition(1)
Min.(2)
Max.
Min.(2)
Max.
Min.(2) Max.
Min.(2)
Max.
Min.(2) Max. Unit
tPLH
PropagationDelay
CL = 50pF
1.5
7
1.5
4.8
1.5
5.1
1.5
4.1
1.5
4.6
ns
tPHL
Dx to Ox
RL = 500
Ω
tPZH
OutputEnableTime
1.5
8.5
1.5
6.2
1.5
6.5
1.5
5.8
1.5
6.5
ns
tPZL
tPHZ
OutputDisableTime
1.5
7.5
1.5
5.6
1.5
5.9
1.5
5.2
1.5
5.7
ns
tPLZ
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
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