This specification covers the detail requirements for monolithic silicon, Schottky TTL, data selectors / multiplexers (three-state) microcircuits. Two product assurance classes and a choice of case outlines and lead finishes are provided and are reflected in the complete part number. For this product, the requirements of MIL-M-38510 have been superseded by MIL-PRF-38535, (see 6.4).