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54F646

Part Number	54F646
Manufacturer	National Semiconductor
Description	Octal Transceiver/Register
Published	Aug 5, 2016
Detailed Description	Obsolete 54F 74F646 74F646B 54F 74F648 Octal Transceiver Register with TRI-STATE Outputs December 1994 54F 74F646...
Datasheet	54F646 PDF File

Overview

Obsolete 54F 74F646 74F646B 54F 74F648 Octal Transceiver Register with TRI-STATE Outputs December 1994 54F 74F646 74F646B 54F 74F648 Octal Transceiver Register with TRI-STATE Outputs General Description These devices consist of bus transceiver circuits with TRISTATE D-type flip-flops and control circuitry arranged for multiplexed transmission of data directly from the input bus or from the internal registers Data on the A or B bus will be clocked into the registers as the appropriate clock pin goes to a high logic level Control G and direction pins are provided to control the transceiver function In the transceiver mode data present at the high impedance port may be stored in either the A or the B register or in both The select controls can multiplex stored and real-time (transparent mode) data The direction control determines which bus will receive data when the enable control G is Active LOW In the isolation mode (control G HIGH) A data may be stored in the B register and...

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