SN74LS221N
SN74LS245N
These octal bus transceivers are designed for
asynchronous two-way communication between data
buses. The control-function implementation minimizes
external timing requirements.
The SNx4LS245 devices allow data transmission
from the A bus to the B bus or from the B bus to the
A bus, depending on the logic level at the directioncontrol (DIR) input. The output-enable (OE) input can
disable the device so that the buses are effectively
isolated.
SN74LS373N
tion
These 8-bit registers feature 3-state outputs
designed specifically for driving highly capacitive
or relatively low-impedance loads. The
high-impedance 3-state and increased
high-logic-level drive provide these registers with
the capability of being connected directly to and
driving the bus lines in a bus-organized system
without need for interface or pullup components.
These devices are particularly attractive for
implementing buffer registers, I/O ports,
bidirectional bus drivers, and working regi