HC4046 System Logic Semiconductor, HC4046 Datasheet

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HC4046

Manufacturer Part Number
HC4046
Description
Phase-Locked Loop
Manufacturer
System Logic Semiconductor
Datasheet

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SL74HC4046
Phase-Locked Loop
High-Performance Silicon-Gate CMOS
with pullup resistors, they are compatible with LS/ALSTTL outputs.
comparators, a voltage-controlled oscillator (VCO) and unity gain op-
amp DEM
COMP
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 comparator 1
(an exclusive OR gate) provides a digital error signal PC1
maintains 90 degrees phase shift at the center frequency between SIG
and COMP
(with leading-edge sensing logic) provides digital error signals PC2
and PCP
COMP
output signal VCO
input VCO
C1A, C1B, R1 and R2. The unity gain op-amp output DEM
signal is needed but no loading can be tolerated. The inhibit input, when high, disables the VCO and all on-amps
to minimize standby power consumption.
frequency discrimination, tone decoding, data synchronization and conditioning, voltage-to-frequency
conversion and motor speed control.
The device inputs are compatible with standard CMOS outputs;
The SL74HC4046 phase-locked loop contains three phase
Applications include FM and FSK modulation and demodulation, frequency synthesis and multiplication,
Low Power Consumption Characteristic of CMOS Device
Operating Speeds Similary to LS/ALSTTL
Wide Operating Voltage Range: 3.0 to 6.0 V
Low Input Current: 1.0
COMP
Low Quiescent Current: 80 A Maximum (VCO disabled)
High Noise Immunity Characteristic of CMOS Devices
Diode Protection on all Inputs
Pin No.
IN
IN
10
11
12
13
14
15
16
1
2
3
4
5
6
7
8
9
, and SIG
OUT
signals (duty cycle is immaterial). The linear VCO produces an
IN
IN
OUT
IN
)
and maintains a 0 degree phase shift between SIG
signal and the capacitor and resistors connected to pins
. The comparators have two common signal inputs,
signals (both at 50% duty cycle). Phase comparator 2
IN
OUT
. Input SIG
whose frequency is determined by the voltage of
COMP
DEM
VCO
Symbol
PCP
PC1
PC2
PC3
VCO
SIG
GND
C1A
INH
C1B
V
R1
R2
CC
OUT
OUT
OUT
OUT
OUT
IN
OUT
IN
IN
IN
A Maximum (except SIG
and COMP
Phase Comparator Pulse Output
Phase Comparator 1 Output
Comparator Input
VCO Output
Inhibit Input
Capacitor C1 Connection A
Capacitor C1 Connection B
Ground (0 V) V
VCO Input
Demodulator Output
Resistor R1 Connection
Resistor R2 Connection
Phase Comparator 2 Output
Signal Input
Phase Comparator 3 Output
Positive Supply Voltage
IN
can be used directly
Name and Function
SS
OUT
IN
with an external resistor is used where the VCO
OUT
IN
and
and
and
OUT
IN
T
A
ORDERING INFORMATION
= -55 to 125 C for all packages
PIN ASSIGNMENT
SL74HC4046N Plastic
SL74HC4046D SOIC
SLS
System Logic
Semiconductor
IN

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HC4046 Summary of contents

Page 1

... High-Performance Silicon-Gate CMOS The device inputs are compatible with standard CMOS outputs; with pullup resistors, they are compatible with LS/ALSTTL outputs. The SL74HC4046 phase-locked loop contains three phase comparators, a voltage-controlled oscillator (VCO) and unity gain op- amp DEM . The comparators have two common signal inputs, ...

Page 2

... Unused inputs must always be tied to an appropriate logic voltage level (e.g., either GND or V Unused outputs must be left open. System Logic SLS Semiconductor Parameter and GND Pins SOIC Package+ Parameter and V IN SL74HC4046 Value Unit -0.5 to +7 750 ...

Page 3

... SL74HC4046 [Phase Comparator Section] DC ELECTRICAL CHARACTERISTICS Symbol Parameter V Minimum High-Level IH Input Voltage DC Coupled SIG , COMP Maximum Low -Level IL Input Voltage DC Coupled SIG , COMP Minimum High-Level OH Output Voltage PCP , PCn OUT OUT V Maximum Low-Level OL Output Voltage PCP , PCn ...

Page 4

... OUT 3.0 0 4.5 0.1 OUT 6.0 0 4.0 mA 4.5 0.26 OUT I 5.2 mA 6.0 0.26 OUT SL74HC4046 =6.0 ns) f Guaranteed Limit 125 C Unit -55 C 175 220 265 340 425 510 68 85 102 270 340 405 ...

Page 5

... SL74HC4046 (continued) System Logic SLS Semiconductor ...

Page 6

... INH= V 3.0 0.1 IL 4.5 0.1 6.0 0.1 3.0 3.0 4.5 3.0 6.0 3.0 3.0 3.0 4.5 3.0 6.0 3.0 3.0 40 4 =50pF,Input -55 C Min Max 3.0 4.5 6.0 3.0 3 4.5 11 6.0 13 3.0 4.5 6.0 3.0 4.5 6.0 SL74HC4046 Guaranteed Limit 85 C 125 C 1.0 1.0 Max Min Max Min Max 1.0 0.1 1.0 0.1 1.0 2.5 0.1 2.5 0.1 2.5 4.0 0.1 4.0 0.1 4.0 300 3.0 300 3.0 300 300 3.0 300 3.0 300 300 3.0 300 3.0 300 300 3.0 300 3.0 300 300 3.0 300 3.0 300 300 3.0 300 3 ...

Page 7

... SL74HC4046 [Demodulator Section] DC ELECTRICAL CHARACTERISTICS Symbol Parameter RS Resistor Range V Offset Voltage VCO OFF IN to VDEM OUT RD Dynamic Output Resistance at DEM OUT Figure 1. Switching Waveforms Figure 3. Switching Waveforms V CC Test Conditions -55 C Min At RS > 300 k 3.0 50 the Leakage 4.5 50 Current can 6 ...

Page 8

... The output of the VCO is a standard high speed CMOS output with an equivalent LS-TTL fan out of 10. of the ref The VCO output is approximately a square wave. This output can either directly feed the COMP phase comparators or feed external prescalers (counters) to enable frequency synthesis. Figure 5. Logic Diagram for VCO SL74HC4046 of the IN ...

Page 9

... SL74HC4046 Phase Comparators All three phase comparators have two inputs, SIG and COMP . The SIG and COMP special DC bias network that enables AC coupling of input signals. If the signals are not AC coupled, standard SL74HC input levels are required. Both input structures are shown in Figure 6. The outputs of these Figure 6 ...

Page 10

Phase Comparator 2 This detector is a digital memory network. It consists of four flip-flops and some gating logic, a three state output and a phase pulse output as shown in Figure 6. This comparator acts only on the positive ...

Page 11

... SL74HC4046 Figure 10. Offset Voltage at Demodulator Output as a Function of VCO and R IN Figure 11B. Frequency Stability versus Ambient Temperature 4 Figure 12A. VCO Frequency ( Function of VCO the VCO Input Voltage (V Figure 11A. Frequency Stability versus Ambient Temperature Figure 11C. Frequency Stability versus Ambient Temperature: V Figure 12B ...

Page 12

... Figure 12C. VCO Frequency ( Function of VCO the VCO Input Voltage (V Figure 13A. Frequency Linearity versus R1,C1 and V CC Figure 12D. VCO Frequency (f ) the VCO Input Voltage (V VCOIN Figure 13B. Definition of VCO Frequency Linearity) IN74HC4046A ) as a Function of VCO ) VCOIN 491 ...

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