參數(shù)資料
型號(hào): MC74VHCT245AM
廠商: ON SEMICONDUCTOR
元件分類: 總線收發(fā)器
英文描述: Octal Bus Transceiver
中文描述: AHCT/VHCT SERIES, 8-BIT TRANSCEIVER, TRUE OUTPUT, PDSO20
封裝: EIAJ, SOIC-20
文件頁(yè)數(shù): 3/4頁(yè)
文件大?。?/td> 106K
代理商: MC74VHCT245AM
MC74VHCT245A
http://onsemi.com
174
AC ELECTRICAL CHARACTERISTICS (Input tr = tf = 3.0ns)
TA = 25°C
TA = – 40 to 85°C
Symbol
Parameter
Test Conditions
Min
Typ
Max
Min
Max
Unit
tPLH,
tPHL
Maximum Propagation Delay
A to B or B to A
VCC = 5.0 ± 0.5V
CL = 15pF
CL = 50pF
4.9
5.4
7.7
8.7
1.0
8.5
9.5
ns
tPZL,
tPZH
Output Enable Time
OE to A or B
VCC = 5.0 ± 0.5V
CL = 15pF
RL = 1k
CL = 50pF
9.4
9.9
13.8
14.8
1.0
1.0
15.0
16.0
ns
tPLZ,
tPHZ
Output Disable Time
OE to A or B
VCC = 5.0 ± 0.5V
CL = 50pF
RL = 1k
10.1
15.4
1.0
16.5
ns
tOSLH,
tOSHL
Output to Output Skew
VCC = 5.0 ± 0.5V
CL = 50pF
(Note 1.)
1.0
1.0
ns
Cin
Maximum Input Capacitance
4
10
10
pF
Cout
Maximum Three–State Output
Capacitance (Output in
High–Impedance State)
13
pF
Typical @ 25
°C, VCC = 5.0V
CPD
Power Dissipation Capacitance (Note 2.)
16
pF
1. Parameter guaranteed by design. tOSLH = |tPLHm – tPLHn|, tOSHL = |tPHLm – tPHLn|.
2. CPD is defined as the value of the internal equivalent capacitance which is calculated from the operating current consumption without load.
Average operating current can be obtained by the equation: ICC(OPR) =CPD VCC fin +ICC/8 (per bit). CPD is used to determine the no–load
dynamic power consumption; PD = CPD VCC2 fin + ICC VCC.
NOISE CHARACTERISTICS (Input tr = tf = 3.0ns, CL = 50pF, VCC = 5.0V)
TA = 25°C
Symbol
Parameter
Typ
Max
Unit
VOLP
Quiet Output Maximum Dynamic VOL
1.2
1.6
V
VOLV
Quiet Output Minimum Dynamic VOL
–1.2
–1.6
V
VIHD
Minimum High Level Dynamic Input Voltage
2.0
V
VILD
Maximum Low Level Dynamic Input Voltage
0.8
V
Figure 3. Switching Waveform
3V
GND
1.5V
Figure 4. Switching Waveform
DIR
OE
A or B
1.5V
tPZL
tPLZ
tPZH tPHZ
3V
HIGH
IMPEDANCE
VOL +0.3V
VOH -0.3V
HIGH
IMPEDANCE
GND
tPHL
B or A
A or B
tPLH
1.5V
3V
VOL
VOH
1.5V
GND
1.5V
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