The 74LS399 are Quad 2-Port Registers. They are the logical equivalent of a quad 2-input multiplexer followed by a quad 4-bit edge-triggered register. A Common Select input selects between two 4-bit in put ports (data sources). The selected data is transferred to the output register on the LOW-to-HIGH transition of the Clock input. The 74LS398 features Q and Q inputs, while the 74LS399 has only Q outputs.

Features :-

• Select From Two Data Sources
• Fully Positive Edge-Triggered Operation
• Input Clamp Diodes Limit High-Speed Termination Effects

Specifications :-

• Supply Voltage Min : 4.75V
• Supply Voltage Max : 5.25V
• Operating Ambient Temperature Range Max : 70°C
• Output Current — High Max : -0.4mA
• Output Current — Low Max : 8.0mA
• Power Supply Current : 13mA

Package Includes :-

1 X 74LS399 IC - (SMD Package) - Quad 2-Port Register IC (74399 IC)