SN74LS244NSR

 Datasheet SN74LS244NSR
    – 3-State Output Drive Bus Lines or Buffer Memory Address Registers
    – PNP Inputs Reduce DC Loading
    – Hysteresis at Input Improves Noise MarginsDescription :    These octal buffers and line drivers are designed specifically to improve both the performance and
density of three-state memory address drivers, clock drivers, and bus-oriented receivers and
transmitters. The designer has a choice of selected combinations of inverting and
noninverting outputs, symmetrical, active-low output-control (G) inputs, and complementary
output-control (G and G) inputs. These devices feature high fan-out, improved fan-in, and 400-mV
noise margin. The SN74LS’ and SN74S’ devices can be used to drive terminated lines down to
133 Ω