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参数资料
| 型号： | DS275 |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | Line Driver or Receiver |
| 英文描述： | LINE TRANSCEIVER, PDIP8 |
| 封装： | 0.300 INCH, PLASTIC, DIP-8 |
| 文件页数： | 6/19页 |
| 文件大小： | 1664K |
| 代理商： | DS275 |
MAX1480E/MAX1490E
±15kV ESD-Protected, Isolated RS-485/RS-422
Data Interfaces
14
______________________________________________________________________________________
cuits over the entire common-mode range (see Typical
Operating Characteristics). In addition, a thermal shut-
down circuit forces the driver outputs into a high-im
pedance state if the die temperature rises excessively.
Propagation Delay Skew
Propagation delay skew is the difference between the
low-to-high and high-to-low propagation delay. Small
driver/receiver skew times help reduce EMI and reflec-
tions by maintaining balanced differential signals.
Table 3. Transmitting
Table 4. Receiving
Table 5. Transmitting
Table 6. Receiving
1
X
INPUTS*
1
High-Z
OUTPUTS
0
High-Z
1
0
Figure 11. Driver Output Waveform and FFT Plot of
MAX1480EA/MAX1490EA Transmitting a 150kHz Signal
10dB/div
0
5MHz
500kHz/div
Figure 12. Driver Output Waveform and FFT Plot of
MAX1480EC/ MAX1490EB Transmitting a 150kHz Signal
10dB/div
0
5MHz
500kHz/div
_____________________Function Tables
Half-Duplex Devices
(MAX1480EA/MAX1480EC)
Full-Duplex Devices
(MAX1490EA/MAX1490EB)
DI
A
B
DE
0
1
≥ +0.2V
Open
INPUTS*
0
VA - VB
OUTPUT
(RO)
DE
≤ -0.2V
1
0
1
Z
Y
1
0
1
OUTPUT
(RO)
0
≤ -0.2V
≥ +0.2V
Open
INPUT
(VA - VB)
X = Don’t care; High-Z = High impedance
* For DE
and DI pin descriptions, see Detailed Block Diagram
and Typical Application Circuit (Figure 1 for MAX1480EA/
MAX1480EC, Figure 2 for MAX1490EA/MAX1490EB).
OUTPUTS
INPUT
*
(DI
)
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