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參數(shù)資料
| 型號： | MC74F2245 |
| 廠商： | Motorola, Inc. |
| 英文描述： | Supply Voltage Supervisor w/Watchdog input, RESET, /RESET 5-SOT-23 -40 to 85 |
| 中文描述： | 25ohm八路雙向收發(fā)器具有三態(tài)輸入和輸出 |
| 文件頁數(shù)： | 3/5頁 |
| 文件大?。?/td> | 137K |
| 代理商： | MC74F2245 |
MC74F2245
TIMING SOLUTIONS
BR1333 — REV 5
3
MOTOROLA
WAVEFORM 1 – PROPAGATION DELAYS
tR = tF = 2.5ns, 10% to 90%; f = 1MHz; tW = 500ns
3.0V
0V
VOH
VOL
An, Bn
Bn, An
tPHL
tPLH
WAVEFORM 2 – OUTPUT ENABLE AND DISABLE TIMES
tR = tF = 2.5ns, 10% to 90%; f = 1MHz; tW = 500ns
3.0V
0V
≈
0V
OE, T/R
An, Bn
tPZH
≈
3.5V
tPHZ
tPZL
tPLZ
An, Bn
1.5V
1.5V
1.5V
1.5V
1.5V
1.5V
Figure 1. AC Waveforms
1.5V
VOH
VOH – 0.3V
VOL + 0.3V
GND
1.5V
OPEN
PULSE
GENERATOR
RT
DUT
VCC
RL
R1
CL
7V
TEST
SWITCH
tPLH, tPHL
Open
tPZL, tPLZ
7V
tPZH, tPHZ
Open
CL = 50pF or equivalent (Includes jig and probe capacitance)
RL = R1 = 500
or equivalent
RT = ZOUT of pulse generator (typically 50
)
Figure 2. Test Circuit
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