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參數(shù)資料
| 型號： | DS275 |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | Line Driver or Receiver |
| 英文描述： | LINE TRANSCEIVER, PDIP8 |
| 封裝： | 0.300 INCH, PLASTIC, DIP-8 |
| 文件頁數(shù)： | 5/19頁 |
| 文件大?。?/td> | 1664K |
| 代理商： | DS275 |
MAX1480E/MAX1490E
±15kV ESD-Protected, Isolated RS-485/RS-422
Data Interfaces
______________________________________________________________________________________
13
Figure 6. Driver Timing Test Load
OUTPUT
UNDER TEST
500
S1
S2
ISO VCC_
CL
Figure 7. Driver Propagation Delays and Transition Times
DI
0
B
A
VO
0
-VO
VO
tPLH
1/2 VO
10%
tR
90%
tPHL
1/2 VO
10%
tF
VDIFF = V (A) - V (B)
VDIFF
VCC_ - 0.4V
2
tSKEW =
tPLH - tPHL
VCC_ - 0.4V
2
Figure 8. Driver Enable and Disable Times
OUTPUT NORMALLY LOW
OUTPUT NORMALLY HIGH
0
A, B
VOL
A, B
0
VOL + 0.5V
VCC_ - 0.4V
2
VCC_ - 0.4V
2
VCC_ -0.4V
VOH - 0.5V
2.3V
tZL
tLZ
tZH
tHZ
DE
Figure 9. Times to/from Shutdown
OUTPUT NORMALLY LOW
OUTPUT NORMALLY HIGH
2.4V
0.8V
A, B
VOL
A, B
0
1.6V
VOL + 0.5V
VOH - 0.5V
2.3V
tZL(SHDN)
tSHDN
tZH(SHDN)
tSHDN
SD
Figure 10. Receiver Propagation Delays
VOH
VOL
-VID
VID
1.5V
0
1.5V
MAX1480EA/MAX1480EC
OUTPUT
MAX1490EA/MAX1490EB
OUTPUT
INPUT
0
RO
RO VOH
VOL
VA - VB
tPHL
tPLH
tPHL
tSKEW =
tPLH - tPHL
Switching Waveforms
____________________________________________________Test Circuits (continued)
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