MC74AC648 Datasheet, PDF (1/9 Pages) Motorola, Inc – OCTAL TRANSCEIVER/REGISTER WITH 3-STATE OUTPUTS (INVERTING)

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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.
MC74AC648
MC74ACT648
OCTAL
TRANSCEIVER/REGISTER
WITH 3-STATE OUTPUTS
(INVERTING)
REAL TIME TRANSFER
A-BUS TO B-BUS
A-BUS
REG
REG
B-BUS
Figure 1
REAL TIME TRANSFER
B-BUS TO A-BUS
A-BUS
REG
REG
B-BUS
Figure 2
STORAGE
FROM BUS TO REGISTER
A-BUS
REG
REG
B-BUS
Figure 3
TRANSFER
FROM REGISTER TO BUS
A-BUS
REG
REG
B-BUS
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
N SUFFIX
CASE 724-03
PLASTIC
DW SUFFIX
CASE 751E-04
SOIC PACKAGE
LOGIC SYMBOL
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
5-1