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74ACT240 数据表(PDF) 4 Page - STMicroelectronics

部件名 74ACT240
功能描述  OCTAL BUS BUFFER WITH 3 STATE OUTPUTS INVERTED
PDF  8 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

74ACT240 数据表(HTML) 4 Page - STMicroelectronics

  74ACT240 Datasheet HTML 1Page - STMicroelectronics 74ACT240 Datasheet HTML 2Page - STMicroelectronics 74ACT240 Datasheet HTML 3Page - STMicroelectronics 74ACT240 Datasheet HTML 4Page - STMicroelectronics 74ACT240 Datasheet HTML 5Page - STMicroelectronics 74ACT240 Datasheet HTML 6Page - STMicroelectronics 74ACT240 Datasheet HTML 7Page - STMicroelectronics 74ACT240 Datasheet HTML 8Page - STMicroelectronics  
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CAPACITIVE CHARACTERISTICS
Symbol
Parameter
Test Con dition s
Value
Unit
VCC
(V)
TA =25
oC-40 to 85 oC
Mi n.
Typ.
Max.
Min .
Max.
CIN
Input Capacitance
5.0
4
pF
COUT
Output Capacitance
5.0
8
pF
CPD
Power Dissipation
Capacitance (note 1)
5.0
21
pF
1) CPD is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without load. (Refer to
Test Circuit). Average operating current can be obtained by the following equation. ICC(opr) = CPD
• VCC •fIN +ICC/n (per circuit)
AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, RL = 500
Ω, Input tr =tf =3 ns)
Symbol
Parameter
T est Cond iti on
Value
Unit
VCC
(V)
TA =25
oC-40 to 85 oC
Mi n.
Typ.
Max.
Min .
Max.
tPLH
tPHL
Propagation Delay Time
5.0
(*)
1.55.0
7.51.5
8.5
ns
tPZL
tPZH
Output Enable Time
5.0
(*)
1.56.0
8.51.5
9.5
ns
tPLZ
tPHZ
Output Disable Time
5.0
(*)
1.5
6.5
10.0
1.5
10.5
ns
(*) Voltage range is 5V
± 0.5V
TEST CIRCUIT
TEST
SWI TCH
tPLH,tPHL
Open
tPZL,tPLZ
2VCC
tPZH,tPHZ
Open
CL = 50 pF or equivalent (includes jig and probe capacitance)
RL =R1 = 500
Ω or equivalent
RT =ZOUT of pulse generator (typically 50
Ω)
74ACT240
4/8



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