MC74AC378 Datasheet, PDF (2/7 Pages) Motorola, Inc – PARALLEL D REGISTER WITH ENABLE

MC74AC378 MC74ACT378
FUNCTIONAL DESCRIPTION
The MC74AC378/74ACT378 consists of six edge-
triggered D-type flip-flops with individual D inputs and Q
outputs. The Clock (CP) and Enable (E) inputs are common to
all flip-flops.
When the E input is LOW, new data is entered into the
register on the LOW-to-HIGH transition of the CP input. When
the E input is HIGH, the register will retain the present data
independent of the CP input.
LOGIC DIAGRAM
D0
D1
D2
D3
D4
D5
CP
CP D
E
Q
CP D
E
Q
CP D
E
Q
CP D
E
Q
CP D
E
Q
CP D
E
Q
E
Q0
Q1
Q2
Q3
Q4
Q5
Please note that this diagram is provided only for the understanding of logic
operations and should not be used to estimate propagation delays.
MAXIMUM RATINGS*
Symbol
Parameter
Value
Unit
VCC
Vin
Vout
Iin
Iout
ICC
Tstg
DC Supply Voltage (Referenced to GND)
DC Input Voltage (Referenced to GND)
DC Output Voltage (Referenced to GND)
DC Input Current, per Pin
DC Output Sink/Source Current, per Pin
DC VCC or GND Current per Output Pin
Storage Temperature
–0.5 to +7.0
V
–0.5 to VCC +0.5
V
–0.5 to VCC +0.5
V
±20
mA
±50
mA
±50
mA
–65 to +150
°C
* Maximum Ratings are those values beyond which damage to the device may occur. Functional operation should be restricted to the Recommended
Operating Conditions.
FACT DATA
5-2