Test Conditions
參數(shù)資料
型號: IDT74FCT257CTQG8
廠商: IDT, Integrated Device Technology Inc
文件頁數(shù): 4/6頁
文件大小: 0K
描述: IC MUX QUAD 2INPUT 3ST 16-QSOP
標(biāo)準(zhǔn)包裝: 3,000
系列: 74FCT
類型: 多路復(fù)用器
電路: 1 x 4:1
獨(dú)立電路: 1
輸出電流高,低: 15mA,48mA
電壓電源: 單電源
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 16-SSOP(0.154",3.90mm 寬)
供應(yīng)商設(shè)備封裝: 16-QSOP
包裝: 帶卷 (TR)
其它名稱: 74FCT257CTQG8
INDUSTRIALTEMPERATURERANGE
4
IDT74FCT257AT/CT/DT
FASTCMOSQUAD2-INPUTMULTIPLEXER
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
OE = 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
fo = 10MHz
50% Duty Cycle
VIN = 3.4V
1.8
4.5
OE = GND
VIN = GND
One Bit Toggling
VCC = Max.
VIN = VCC
1.5
3.5(5)
Outputs Open
VIN = GND
fo = 2.5MHz
50% Duty Cycle
VIN = 3.4V
2.5
7.5(5)
OE = GND
VIN = GND
Four 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 (fONO)
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)
fO = Output Frequency
NO = Number of Outputs at fO
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.
FCT257AT
FCT275CT
FCT275DT
Symbol
Parameter
Condition(1)
Min.(2)
Max.
Min.(2)
Max.
Min.(2)
Max.
Unit
tPLH
PropagationDelay
CL = 50pF
1.5
5
1.5
4.3
1.5
3.9
ns
tPHL
Ix to Zx
RL = 500
Ω
tPLH
PropagationDelay
1.5
7
1.5
5.2
1.5
4.4
ns
tPHL
S to Zx
tPZH
OutputEnableTime
1.5
7
1.5
6
1.5
4.4
ns
tPZL
tPHZ
OutputDisableTime
1.5
5.5
1.5
5
1.5
4.4
ns
tPLZ
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
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