74LS423
74LS423 Retriggerable Monostable Multivibrators by Texas Instruments: datasheet PDF, pinout and specifications.
Texas Instruments (TI) is a Dallas-based semiconductor company and one of the largest makers of analog and embedded processing chips. Its catalogue covers op amps, voltage regulators, data converters, interface and logic ICs, MSP430 and C2000 microcontrollers, and the classic NE555 timer. TI also absorbed Burr-Brown and National Semiconductor, so many legacy LM-series datasheets carry its name.

74LS423 Retriggerable Monostable Multivibrators by Texas Instruments: datasheet PDF, pinout and specifications.
74LS590 8-bit Binary Counter with Tri-State Register by Texas Instruments (SOIC-16, PDIP-16, SO-16): datasheet PDF, pinout and specifications.
74ls595 8-bit serial-to-parallel Shift Register Tri-State by Texas Instruments (SOIC-16, PDIP-16): datasheet PDF, pinout and specifications.
74LS366 Hex Inverter (TRI-STATE) by Texas Instruments (CDIP, SOIC, PDIP): datasheet PDF, pinout and specifications.