74lvq161 STMicroelectronics, 74lvq161 Datasheet - Page 2

• Manufacturer Part Number: 74lvq161
• Description: Synchronous Presettable 4-bit Counter
• Manufacturer: STMicroelectronics

74LVQ161
Figure 2: Input And Output Equivalent Circuit
Table 3: Truth Table
X : Don’t Care; A, B, C, D; Logic level of data input; CARRY OUT: TE x QA x QB x QC x QD
Figure 3: Logic Diagram
2/14
CLEAR
H
H
H
H
H
L
LOAD
H
H
H
X
X
L
INPUTS
PE
H
X
X
X
X
L
TE
X
X
X
H
X
L
CK
X
A
L
Table 2: Pin Description
14, 13, 12,
3, 4, 5, 6
PIN N°
10
15
16
11
1
2
7
9
8
NO CHANGE
NO CHANGE
NO CHANGE
B
L
COUNT UP
OUTPUTS
CARRY OUT Terminal Count Output
A, B, C, D
SYMBOL
QA to QD
CLOCK
CLEAR
LOAD
C
GND
L
V
PE
TE
CC
Asynchronous
Reset
Clock Input (LOW to
HIGH Edge Trigger)
Data Inputs
Count Enable Input
Count Enable Carry Input
Parallel Enable Input
Flip-Flop Outputs
Ground (0V)
Positive Supply Voltage
D
L
NAME AND FUNCTION
PRESET DATA
RESET TO "0"
NO COUNT
NO COUNT
NO COUNT
FUNCTION
COUNT
Master