參數(shù)資料
型號: 74VHCT244AM
廠商: FAIRCHILD SEMICONDUCTOR CORP
元件分類: 通用總線功能
英文描述: Octal Buffer/Line Driver with 3-STATE Outputs
中文描述: AHCT/VHCT SERIES, DUAL 4-BIT DRIVER, TRUE OUTPUT, PDSO20
封裝: 0.300 INCH, MS-013, SOIC-20
文件頁數(shù): 4/8頁
文件大小: 63K
代理商: 74VHCT244AM
CAPACITIVE CHARACTERISTICS
Symbol
Parameter
Test Conditions
Value
Unit
T
A
= 25
o
C
Min.
Typ.
-40 to 85
o
C
Min.
Max.
10
Max.
10
C
IN
C
OUT
C
PD
Input Capacitance
Output Capacitance
Power Dissipation
Capacitance (note 1)
4
9
18
pF
pF
pF
1)C
PD
isdefined as thevalue oftheIC’sinternal equivalent capacitance whichiscalculated fromtheoperatingcurrent consumption without load.(Referto
TestCircuit).Average operatingcurrent canbeobtained bythefollowingequation.I
CC
(opr)=C
PD
V
CC
f
IN
+I
CC
/48(per Gate)
TESTCIRCUIT
TEST
SWITCH
Open
V
CC
GND
t
PLH
, t
PHL
t
PZL
, t
PLZ
t
PZH
, t
PHZ
C
L
=15/50pForequvalent (includes jigand probecapacitance)
R
L
=R
1
=1K
orequivalent
R
T
=Z
OUT
ofpulsegenerator (typically50
)
DYNAMIC SWITCHING CHARACTERISTICS
Symbol
Parameter
Test Conditions
V
CC
(V)
Value
Unit
T
A
= 25
o
C
Min.
Typ.
-40 to 85
o
C
Min.
Max.
1.1
Max.
V
OLP
V
OLV
V
IHD
Dynamic Low Voltage
Quiet Output (note 1, 2)
5.0
C
L
= 50pF
0.9
-0.9
V
-1.1
2.0
Dynamic High Voltage
Input (note 1, 3)
Dynamic Low Voltage
Input (note 1, 3)
1)Worstcasepackage.
2)Maxnumber ofoutputsdefined as(n).Datainputsaredriven0Vto5.0V,(n-1)outputs switching andone outputatGND.
3)Maxnumber ofdatainputs (n)switching.(n-1)switching0Vto5.0V. Inputsunder testswitching: 5.0Vtothreshold (V
ILD
),0Vtothreshold (V
IHD
),f=1MHz.
5.0
V
ILD
5.0
0.8
74VCHT244A
4/8
相關PDF資料
PDF描述
74VHCT244AMTC Octal Buffer/Line Driver with 3-STATE Outputs
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