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74LS399

Part Number	74LS399
Manufacturer	Motorola
Description	QUAD 2-PORT REGISTER
Published	Apr 11, 2016
Detailed Description	QUAD 2-PORT REGISTER The SN54 / 74LS398 and SN54 / 74LS399 are Quad 2-Port Registers. They are the logical equivalent of...
Datasheet	74LS399 PDF File

Overview

QUAD 2-PORT REGISTER The SN54 / 74LS398 and SN54 / 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 input ports (data sources).
The selected data is transferred to the output register on the LOW-to-HIGH transition of the Clock input.
The SN54/ 74LS398 features both Q and Q inputs, while the SN54 / 74LS399 has only Q outputs.
• Select From Two Data Sources • Fully Positive Edge-Triggered Operation • Both True and Complemented Outputs on SN54 / 74LS398 • Input Clamp Diodes Limit High-Speed Termination Effects CONNECTION DIAGRAM DIP (TOP VIEW) VCC Qd ...

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