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74VHCT126AMTR Datasheet(PDF) 4 Page - STMicroelectronics

Part No. 74VHCT126AMTR
Description  QUAD BUS BUFFERS 3-STATE
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Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
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CAPACITIVE CHARACTERISTICS
Symb ol
Parameter
Test Co nditi ons
Valu e
Un it
TA =25
oC
-40 to 85
oC
Min.
T yp.
Max.
Mi n.
Max.
CIN
Input Capacitance
4
10
10
pF
COUT
Output Capacitance
10
pF
CPD
Power Dissipation
Capacitance (note 1)
14
pF
1) CPD isdefined as the value of the IC’sinternal equivalent capacitance which is calculated fromthe operating current consumption without load. (Referto
Test Circuit).Average operting current can be obtained by the following equation. ICC(opr) = CPD
• VCC • fIN +ICC/4(per circuit)
TEST CIRCUIT
T EST
SW IT CH
tPLH,tPHL
Open
tPZL,tPLZ
VCC
tPZH,tPHZ
GND
CL = 15/50 pF or equivalent (includes jig and probe capacitance)
RL =R1 =1K
Ω orequivalent
RT =ZOUT of pulse generator (typically 50
Ω)
DYNAMIC SWITCHING CHARACTERISTICS
Symb ol
Parameter
T est Cond ition s
Val ue
Un it
VCC
(V)
TA =25
oC
-40 to 85
oC
Min.
Typ .
Max.
Min .
Max.
VOLP
Dynamic Low Voltage
Quiet Output (note 1, 2)
5.0
CL =50 pF
0.3
0.8
V
VOLV
-0.8
-0.3
VIHD
Dynamic High Voltage
Input (note 1, 3)
5.0
2.0
VILD
Dynamic Low Voltage
Input (note 1, 3)
5.0
0.8
1) Worst case package.
2) Max number of outputs defined as (n). Data inputs are driven 0V to 5.0V, (n -1) outputs switching and one output at GND.
3) Max number of data inputs (n) switching. (n-1) switching 0V to5.0V. Inputs under test switching: 5.0V to threshold (VILD), 0V to threshold (VIHD), f=1MHz.
74VHCT126A
4/8




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