74LS6   Datasheet

Motorola => Freescale

8-BIT MAGNITUDE COMPARATORS

ON Semiconductor

8-Bit Magnitude Comparitors

ON Semiconductor

4 x 4 Register File with 3-State Outputs

Hitachi -> Renesas Electronics

Octal Bus Transceivers(non-inverted-3state outputs)

Motorola => Freescale

OCTAL BUS TRANSCEIVERS LOW POWER SCHOTTKY

Motorola => Freescale

4 x 4 REGISTER FILE WITH 3-STATE OUTPUTS LOW POWER SCHOTTKY

Fairchild Semiconductor

Octal Bus Transceiver

Motorola => Freescale

OCTAL BUS TRANSCEIVERS LOW POWER SCHOTTKY

ON Semiconductor

SYNCHRONOUS 4-BIT UP/DOWN COUNTER