MC54F168J View Datasheet(PDF) - Motorola => Freescale
Part Name
Description
Manufacturer
MC54F168J Datasheet PDF : 6 Pages
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4-STAGE SYNCHRONOUS
BIDIRECTIONAL COUNTERS
The MC54/74F168 and MC54/74F169 are fully synchronous 4-stage up/
down counters. The F168 is a BCD decade counter; the F169 is a modulo-16
binary counter. Both feature a preset capability for programmable operation,
carry lookahead for easy cascading, and a U/D input to control the direction
of counting. All state changes, whether in counting or parallel loading, are initi-
ated by the LOW-to-HIGH transition of the clock.
• Asynchronous Counting and Loading
• Built-In Lookahead Carry Capability
• Presettable for Programmable Operation
CONNECTION DIAGRAM (TOP VIEW)
VCC
TC
16
15
Q0
14
Q1
13
Q2
12
Q3
11
CET
10
PE
9
MC54/74F168
MC54/74F169
4-STAGE SYNCHRONOUS
BIDIRECTIONAL COUNTERS
FAST™ SCHOTTKY TTL
16
1
J SUFFIX
CERAMIC
CASE 620-09
1
U/D
2
CP
3
P0
4
P1
5
P2
6
P3
7
8
CEP GND
MODE SELECT TABLE
PE
CEP
CET
U/D
Action on Rising
Clock Edge
L
X
X
X
Load (Pn Qn)
H
L
L
H
Count Up (Increment)
H
L
L
L
Count Down (Decrement)
H
H
X
X
No Change (Hold)
H
X
H
X
No Change (Hold)
H = HIGH Voltage Level; L = LOW Voltage Level; X = Don’t Care
STATE DIAGRAMS
MC54/74F169
MC54/74F168
0
1
2
3
4
0
1
2
3
15
5
10
15
14
6
9
4
13
11
14
13
7
8
7
6
5
COUNT DOWN
COUNT UP
12
12
11
10
9
8
COUNT DOWN
COUNT UP
FAST AND LS TTL DATA
4-141
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
9 34 5 6
1
7
10
2
PE P0 P1 P2 P3
U/D
CEP
CET
TC
CP
Q0 Q1 Q2 Q3
14 13 12 11
VCC = Pin 16
GND = Pin 8
15
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