DUAL LINE DRIVERSThe SN55109A SN55110A SN75109A
SN75110A and SN75112 dual Line Drivers have
improved output current regulation with supply
voltage and temperature variations. In addition,
the higher current of the SN75112 (27 mA) allows
data to be transmitted over longer lines. These
drivers offer optimum performance when used
with the SN55107A SN55108A, SN75107A and
SN75108A line receivers.
These drivers feature independent channels with
common voltage supply and ground terminals.
The significant difference between the three
drivers is in the output current specification. The driver circuits feature a constant output current that is switched
to either of two output terminals by the appropriate Logic levels at the input terminals. The output current CAN
be switched off (inhibited) by low Logic levels on the enable inputs. The output current is nominally 6 mA for the
109A, 12 mA for the 110A, and 27 mA for the SN75112.
The enable/inhibit feature is provided so the circuits CAN be used in party-line or data-bus applications. A strobe
or inhibitor (enable D), common to both drivers, is included for increased driver-logic versatility. The output
current in the inhibited mode, IO(off), is specified so that minimum line loading is induced when the driver is used
in a party-line system with other drivers. The output impedance of the driver in the inhibited mode is very high.
The output impedance of a Transistor is biased to cutoff By Texas Instruments
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SN75109A Pb-Free | SN75109A Cross Reference | SN75109A Schematic | SN75109A Distributor |
SN75109A Application Notes | SN75109A RoHS | SN75109A Circuits | SN75109A footprint |