MC5474F398 Datasheet, PDF (1/3 Pages) Motorola, Inc – QUAD 2-PORT REGISTER

QUAD 2-PORT REGISTER
The MC54/74F398 is the logical equivalent of a quad 2-input multiplexer
feeding into four edge-triggered flip-flops. A common Select input determines
which of the two 4-bit words is accepted. The selected data enters the flip-
flops on the rising edge of the clock.
• Select Inputs from Two Data Sources
• Fully Positive Edge-Triggered Operation
• Both True and Complement Outputs
CONNECTION DIAGRAM (TOP VIEW)
VCC Qd Qd I0d I1d I1c I0c Qc Qc _CP
20 19 18 17 16 15 14 13 12 11
MC54/74F398
QUAD 2-PORT REGISTER
FAST™ SCHOTTKY TTL
20
1
J SUFFIX
CERAMIC
CASE 732-03
1
2
S ^Qa
3
4
Qa I0a
5
6
78
9
10
I1a I1b I0b Qb Qb GND
LOGIC DIAGRAM
I0a
S
D
Qa
I1a
CP
Qa
I0b
D
Qb
I1b
CP
Qb
I0c
D
Qc
I1c
CP
Qc
I0d
D
Qd
I1d
CP
Qd
CP
NOTES:
This diagram is provided only for the understanding of logic operations and
should not be used to estimate propagation delays.
FAST AND LS TTL DATA
4-189
20
1
N SUFFIX
PLASTIC
CASE 738-03
20
1
DW SUFFIX
SOIC
CASE 751D-03
ORDERING INFORMATION
MC54FXXXJ Ceramic
MC74FXXXN Plastic
MC74FXXXDW SOIC
LOGIC SYMBOL
4 5 7 6 14 15 17 16
I0a I1a I0b I1b I0c I1c I0d I1d
1S
11 CP
Qa Qa Qb Qb Qc Qc Qd Qd
2 3 9 8 12 13 19 18
VCC = PIN 20
GND = PIN 10