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MC14046BCLDS

更新时间： 2024-01-08 09:32:59
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摩托罗拉 - MOTOROLA /
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MC14046BCLDS 数据手册

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SEMICONDUCTOR TECHNICAL DATA  
L SUFFIX  
CERAMIC  
CASE 620  
The MC14046B phase locked loop contains two phase comparators, a  
voltage–controlled oscillator (VCO), source follower, and zener diode. The  
comparators have two common signal inputs, PCA and PCB . Input PCA  
in in  
in  
can be used directly coupled to large voltage signals, or indirectly coupled  
(with a series capacitor) to small voltage signals. The self–bias circuit  
adjusts small voltage signals in the linear region of the amplifier. Phase  
P SUFFIX  
PLASTIC  
CASE 648  
comparator 1 (an exclusive OR gate) provides a digital error signal PC1  
,
out  
and maintains 90° phase shift at the center frequency between PCA and  
in  
PCB signals (both at 50% duty cycle). Phase comparator 2 (with leading  
in  
edge sensing logic) provides digital error signals, PC2  
and LD, and  
out  
DW SUFFIX  
SOIC  
CASE 751G  
maintains a 0° phase shift between PCA and PCB signals (duty cycle is  
in in  
immaterial). The linear VCO produces an output signal VCO  
whose  
out  
frequency is determined by the voltage of input VCO and the capacitor and  
in  
resistors connected to pins C1 , C1 , R1, and R2. The source–follower  
A
B
ORDERING INFORMATION  
output SF  
with an external resistor is used where the VCO signal is  
in  
out  
MC14XXXBCP  
MC14XXXBCL  
MC14XXXBDW  
Plastic  
Ceramic  
SOIC  
needed but no loading can be tolerated. The inhibit input Inh, when high,  
disables the VCO and source follower to minimize standby power  
consumption. The zener diode can be used to assist in power supply  
regulation.  
T
A
= – 55° to 125°C for all packages.  
Applications include FM and FSK modulation and demodulation, fre-  
quency synthesis and multiplication, frequency discrimination, tone decod-  
ing, data synchronization and conditioning, voltage–to–frequency  
conversion and motor speed control.  
PIN ASSIGNMENT  
LD  
out  
1
2
16  
15  
V
DD  
ZENER  
•
•
•
•
•
•
Buffered Outputs Compatible with MHTL and Low–Power TTL  
Diode Protection on All Inputs  
Supply Voltage Range = 3.0 to 18 V  
PC1  
PCB  
3
4
5
6
7
8
14  
13  
12  
11  
10  
9
PCA  
in  
in  
Pin–for–Pin Replacement for CD4046B  
VCO  
PC2  
R2  
out  
out  
Phase Comparator 1 is an Exclusive Or Gate and is Duty Cycle Limited  
Phase Comparator 2 switches on Rising Edges and is not Duty Cycle  
Limited  
INH  
C1  
A
R1  
C1  
SF  
B
out  
V
VCO  
SS  
in  
BLOCK DIAGRAM  
SELF BIAS  
CIRCUIT  
PHASE  
COMPARATOR 1  
PCA 14  
in  
2
PC1  
out  
PHASE  
COMPARATOR 2  
13 PC2  
out  
PCB  
VCO  
3
9
1
LD  
in  
4
VCO  
VOLTAGE  
CONTROLLED  
OSCILLATOR  
(VCO)  
out  
in  
11 R1  
12 R2  
V
V
= PIN 16  
= PIN 8  
6
7
C1  
C1  
DD  
SS  
A
B
SOURCE FOLLOWER  
10 SF  
out  
15 ZENER  
INH  
5
V
SS  
REV 3  
1/94  
Motorola, Inc. 1995  
1234567

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