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MC74AC648

Motorola
Part Number MC74AC648
Manufacturer Motorola
Description OCTAL TRANSCEIVER/REGISTER
Published Oct 14, 2006
Detailed Description www.DataSheet4U.com MC74AC648 Product Preview Octal Transceiver/Register with 3ĆState Outputs (Inverting) The MC74AC64...
Datasheet PDF File MC74AC648 PDF File

MC74AC648
MC74AC648

Overview
www.
DataSheet4U.
com MC74AC648 Product Preview Octal Transceiver/Register with 3ĆState Outputs (Inverting) The MC74AC648/74ACT648 consist of registered bus transceiver circuits, with outputs, D-type flip-flops and control circuitry providing multiplexed transmission of data directly from the input bus or from the internal storage registers.
Data on the A or B bus will be loaded into the respective registers on the LOW-to-HIGH transition of the appropriate clock pin (CAB or CBA).
The four fundamental data handling functions available are illustrated in the following figures.
MC74ACT648 OCTAL TRANSCEIVER/REGISTER WITH 3-STATE OUTPUTS (INVERTING) REAL TIME TRANSFER A-BUS TO B-BUS A-BUS REAL TIME TRANSFER B-BUS TO A-BUS A-BUS N SUFFIX CASE 724-03 PLASTIC REG REG B-BUS REG B-BUS REG Figure 1 Figure 2 STORAGE FROM BUS TO REGISTER A-BUS TRANSFER FROM REGISTER TO BUS A-BUS DW SUFFIX CASE 751E-04 SOIC PACKAGE REG REG REG REG LOGIC SYMBOL B-BUS B-BUS Figure 3 Figure 4 • • • • • • Independent Registers for A and B Buses Multiplexed Real-Time and Stored Data Transfers Choice of True and Inverting Data Paths 3-State Outputs 300 mil Slim Dual In-Line Package Outputs Source/Sink 24 mA CAB A0 A1 A2 A3 A4 A5 A6 A7 SAB DIR CBA SBA G B0 B1 B2 B3 B4 B5 B6 B7 This document contains information on a product under development.
Motorola reserves the right to change or discontinue this product without notice.
FACT DATA DataSheet 4 U .
com 5-1 www.
DataSheet4U.
com MC74AC648 MC74ACT648 FUNCTION TABLE Inputs G H H L L L L DIR X X L L H H CAB H or L X X X H or L CBA H or L X X X X SAB X X X X L H SBA X X L H X X A0–A7 Input Output Input Data I/O* Operation or Function B0–B7 Input Input Output Isolation Store A and B Data Real Time B Data to A Bus Stored B Data to A Bus Real Time A Data to B Bus Stored A Data to B Bus * The data output functions may be enabled or disabled by various signals at the G and DIR inputs.
Data input functions are always enabled; i.
e.
, data at...


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