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參數資料
| 型號： | MC74F169N |
| 廠商： | MOTOROLA INC |
| 元件分類： | 通用總線功能 |
| 英文描述： | Supply Voltage Supervisor w/Watchdog input and manual reset 5-SOT-23 |
| 中文描述： | F/FAST SERIES, SYN POSITIVE EDGE TRIGGERED 4-BIT BIDIRECTIONAL BINARY COUNTER, PDIP16 |
| 封裝： | 648-08 |
| 文件頁數： | 1/4頁 |
| 文件大小： | 119K |
| 代理商： | MC74F169N |
4-82
FAST AND LS TTL DATA
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)
15
16
14
13
12
11
10
2
1
3
4
5
6
7
VCC
9
8
TC
Q0
Q1
Q2
Q3
CET
PE
U/D
CP
P0
P1
P2
P3
CEP
GND
MODE SELECT TABLE
PE
CEP
CET
U/D
Action on Rising
Clock Edge
L
H
H
H
H
X
L
L
H
X
X
L
L
X
H
X
H
L
X
X
Load (Pn
o
Qn)
Count Up (Increment)
Count Down (Decrement)
No Change (Hold)
No Change (Hold)
H = HIGH Voltage Level; L = LOW Voltage Level; X = Don’t Care
0
15
14
13
8
12
5
14
11
15
10
7
6
12
13
3
1
MC54/74F168
2
COUNT DOWN
COUNT UP
COUNT DOWN
COUNT UP
MC54/74F169
1
2
4
5
9
8
3
0
4
11
10
9
6
7
STATE DIAGRAMS
MC54/74F168
MC54/74F169
4-STAGE SYNCHRONOUS
BIDIRECTIONAL COUNTERS
FAST
SCHOTTKY TTL
J SUFFIX
CERAMIC
CASE 620-09
N SUFFIX
PLASTIC
CASE 648-08
16
1
16
1
ORDERING INFORMATION
MC54FXXXJ
MC74FXXXN
MC74FXXXD
Ceramic
Plastic
SOIC
16
1
D SUFFIX
SOIC
CASE 751B-03
LOGIC SYMBOL
PE P0P1P2P3
U/D
CEP
CET
CP
Q0Q1Q2Q3
TC
3 4
5 6
9
10
2
1
7
14
13 12 11
15
VCC = Pin 16
GND = Pin 8
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