4-Bit D-Type Register 3-State Outputs DIP-16 High speed 4-bit register featuring 3-state outputs for use in bus-organized systems. The clock is fully edge-triggered allowing either a load from the D inputs or a hold depending on the state of the Input Enable lines. Specifications Series: 7400 Package: PDIP-16 Fully edge-triggered 3-state outputs Gated input and output enables