3-State Outputs Drive Bus Lines or Buffer
Memory Address Registers
pnp Inputs Reduce dc Loading
Data Flowthrough Pinout (All Inputs on
Opposite Side From Outputs)

description
These octal buffers and line drivers are designed
to have the performance of the popular
SN54ALS240A/SN74ALS240A series and, at
the same time, offer a pinout with inputs and
outputs on opposite sides of the package. This
arrangement greatly facilitates printed circuit
board layout.
The 3-state control gate is a 2-input NOR gate
such that, if either output-enable (OE1 or OE2)
input is high, all eight outputs are in the
high-impedance state.
The SN74ALS540 provides inverted data. The
’ALS541 provide true data at the outputs.
The -1 versions of SN74ALS540 and
SN74ALS541 are identical to the standard
versions, except that the recommended
maximum IOL is increased to 48 mA. There is no
-1 version of the SN54ALS541.