MAX1490EACPG Maxim Integrated, MAX1490EACPG Datasheet - Page 14

• Manufacturer Part Number: MAX1490EACPG
• Description: RS-422/RS-485 Interface IC
• Manufacturer: Maxim Integrated

Specifications of MAX1490EACPG

• Data Rate: 2.5 Mbps
• Operating Supply Voltage: 5 V
• Supply Current: 180 mA
• Operating Temperature Range: 0 C to + 70 C
• Mounting Style: Through Hole
• Package / Case: PDIP-24
• Maximum Power Dissipation: 696 mW

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 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.
±15kV ESD-Protected, Isolated RS-485/RS-422
Data Interfaces
Figure 11. Driver Output Waveform and FFT Plot of
MAX1480EA/MAX1490EA Transmitting a 150kHz Signal
Figure 12. Driver Output Waveform and FFT Plot of
MAX1480EC/ MAX1490EB Transmitting a 150kHz Signal
14
10dB/div
10dB/div
______________________________________________________________________________________
0
0
Propagation Delay Skew
500kHz/div
500kHz/div
5MHz
5MHz
_____________________Function Tables
Table 3. Transmitting
X = Don’t care; High-Z = High impedance
Table 4. Receiving
Table 5. Transmitting
* For DE
and Typical Application Circuit (Figure 1 for MAX1480EA/
MAX1480EC, Figure 2 for MAX1490EA/MAX1490EB).
Table 6. Receiving
DE
INPUT
1
1
0
(DI
´
DE
´
1
0
and DI
0
0
0
INPUTS*
´
(V
´
)
≥ +0.2V
≤ -0.2V
INPUT
*
Open
A
- V
´
INPUTS*
pin descriptions, see Detailed Block Diagram
B
)
DI
1
0
X
(MAX1480EA/MAX1480EC)
´
(MAX1490EA/MAX1490EB)
V
≥ +0.2V
≤ -0.2V
Open
A
Z
0
1
- V
Half-Duplex Devices
Full-Duplex Devices
B
High-Z
OUTPUTS
B
0
1
OUTPUTS
OUTPUT
(RO)
1
0
1
OUTPUT
(RO)
High-Z
Y
1
0
0
1
0
A
1
0