MC5474F148 Datasheet, PDF (1/3 Pages) Motorola, Inc – 8-LINE TO 3-LINE PRIORITY ENCODER FAST SHOTTKY TTL

8-LINE TO 3-LINE
PRIORITY ENCODER
The MC54/74F148 provides three bits of binary coded output representing
the position of the highest order active input, along with an output indicating
the presence of any active input. It is easily expanded via input and output en-
ables to provide priority encoding over many bits.
• Encodes Eight Data Lines in Priority
• Provides 3-Bit Binary Priority Code
• Input Enable Capability
• Signals When Data Present on Any Input
• Cascadable for Priority Encoding of n Bits
CONNECTION DIAGRAM DIP (TOP VIEW)
VCC EO GS I3 I2 I1 I0 A0
16 15 14 13 12 11 10 9
12
I4 I5
(10)
I0
(11)
I1
3456
I6 I7 E1 A2
LOGIC DIAGRAM
78
A1 GND
(15)
EO
(14)
GS
(12)
I2
(13)
I3
(9)
A0
(1)
I4
(2)
I5
(7)
A1
(3)
I6
(4)
I7
(6)
A2
(5)
E1
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
4-59
MC54/74F148
8-LINE TO 3-LINE
PRIORITY ENCODER
FAST™ SHOTTKY TTL
16
1
J SUFFIX
CERAMIC
CASE 620-09
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
10 11 12 13 1 2 3 4 5
I0 I1 I2 I3 I4 I5 I6 I7 E1
EO A0 A1 A2 GS
15 9 7 6 14
VCC = PIN 16
GND = PIN 8