MC54F399 Datasheet, PDF (1/3 Pages) Motorola, Inc – QUAD 2-PORT REGISTER FAST SCHOTTKY TTL

QUAD 2-PORT REGISTER
The MC54/74F399 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. The MC54/74F399 is the 16-pin version
of the MC54/74F398, with only the Q outputs of the flip-flops available.
• Select Inputs from Two Data Sources
• Fully Positive Edge-Triggered Operation
CONNECTION DIAGRAM (TOP VIEW)
VCC Qd I0d I1d I1c I0c Qc CP
16 15 14 13 12 11 10 9
MC54/74F399
QUAD 2-PORT REGISTER
FAST™ SCHOTTKY TTL
16
1
J SUFFIX
CERAMIC
CASE 620-09
1
2
3
4
5
6
7
8
S ^{Qa I0a I1a I1b I0b Qb GND}
LOGIC DIAGRAM
I0a
S
D
Qa
I1a
CP
I0b
D
Qb
I1b
CP
I0c
D
Qc
I1c
CP
I0d
D
Qd
I1d
CP
CP
NOTE:
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
4-192
16
1
N SUFFIX
PLASTIC
CASE 648-08
16
1
D SUFFIX
SOIC
CASE 751B-03
ORDERING INFORMATION
MC54FXXXJ
MC74FXXXN
MC74FXXXD
Ceramic
Plastic
SOIC
LOGIC SYMBOL
3 4 6 5 11 12 14 13
I0a I1a I0b I1b I0c I1c I0d I1d
1S
9 CP
Qa Qb Qc Qd
2 7 10 15
VCC = PIN 16
GND = PIN 8