QUAD BUS BUFFERS (3-STATE)
The M54/74126 are high speed CMOS QUAD BUS BUFFER (3-STATE) FABRICATED IN SILICON GATE C2 MOS technology. They have the same high speed performance of LSTTL combined with true CMOS low power consumption. These devices require the same 3-STATE control input G to be taken high to make the output go into the high impedance state. All inputs are equipped with protection circuits against static discharge and transient excess voltage.
See full feature at datasheet from below: