HD26C31

10

HD26C31 Line Driver Applications

The HD26C31 is a line driver that meets the EIA RS-422A conditions, and has been designed to supply a

high current for differential signals to a bus line. Its features are listed below.

• Operates on a single 5 V power supply.

• High output impedance when power is off

• Sink current and source current both 20 mA

• On-chip power up/down protection circuit

As shown by the logic diagram, the enable function is common to all four drivers, and either active-high or

active-low can be selected.

The output section consists of two output stages (the Y side and Z side), each of which has the same sink

current and source current capacity.

Connection of a termination resistance when the HD26C31 is used as a balanced differential type driver is

shown.

Ta = 25

°C

Output Characteristics ("H" Level)

0

–20

–40

–60

–80

–100

1.0

2.0

3.0

4.0

5.0

Figure 1 I