DS89C387TMEA National Semiconductor, DS89C387TMEA Datasheet - Page 8

• Manufacturer Part Number: DS89C387TMEA
• Description: RS422/485 Line Driver IC
• Manufacturer: National Semiconductor

Specifications of DS89C387TMEA

• Device Type: Line
• No. Of Drivers: 1
• Driver Case Style: SSOP
• No. Of Pins: 48
• Mounting Type: Surface Mount
• No. Of Driver/receivers: 12/0
• Peak Reflow Compatible (260 C): No
• Supply Voltage: 5V
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

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DS89C387 Equivalent Input/Output Circuits
Skew (comp.)
Skew (channel)
Skew (device)
Parameter
TABLE 1. DS89C387 Skew Table
Min
0
0
0
Typ
0.5
FIGURE 12. Driver Output Equivalent Circuit
Max
3
9
9
Driver Enable Equivalent Circuit
FIGURE 13. Driver Input or
Units
ns
ns
ns
8
Note Skew (comp.) in Table 1 is the same as “Skew” in the
datasheet. Also Skew (channel) and Skew (device) are cal-
culations, but are guaranteed by the propagation delay tests.
Both Skew (channel) and Skew (device) would normally be
tighter whenever specified from characterization data.
The information in this section of the datasheet is to help clar-
ity how skew is defined in this datasheet. This should help
when designing the DS89C387 into most applications.
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