)
inputs. The output-enable inputs can be used to disable the device so
that the buses are effectively isolated.SDFS062A - D2932, MARCH 1987 - REVISED OCTOBER 1993
These quadruple bus transceivers are designed for asynchronous
communications between data buses. The control function
implementation allows for maximum flexibility in timing. These
devices allow data transmission from the A bus to the B bus or from
the B bus to the A bus depending upon the logic levels at the
output-enable (OEBA and )
inputs. The output-enable inputs can be used to disable the device so
that the buses are effectively isolated.
The dual-enable configuration gives the quadruple bus transceivers
the capability to store data by simultaneous enabling of OEBA and
. Each output
reinforces its input in this transceiver configuration. Thus, when
both control inputs are enabled and all other data sources to the two
sets of bus lines are at high impedance, both sets of bus lines
(eight in all) remain at their states. The 4-bit codes appearing on
the two sets of buses will be complementary for the ´F242.
The SN54F242 is characterized for operation over the full military temperature range of -55°C to 125°C. The SN74F242 is characterized for operation from 0°C to 70°C.