MC1648 반도체 회로 부품 판매점
Voltage Controlled Oscillator
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 Motorola Semiconductors |
MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Voltage Controlled Oscillator
Consider MC12148 for New Designs
The MC1648 requires an external parallel tank circuit consisting of the
inductor (L) and capacitor (C). For Maximum Performance QL ≥ 100 at
Frequency of Operation.
A varactor diode may be incorporated into the tank circuit to provide a
voltage variable input for the oscillator (VCO). The MC1648 was
designed for use in the Motorola Phase–Locked Loop shown in Figure 9.
This device may also be used in many other applications requiring a fixed
or variable frequency clock source of high spectral purity. (See Figure 2)
The MC1648 may be operated from a +5.0Vdc supply or a –5.2Vdc
supply, depending upon system requirements.
NOTE: The MC1648 is NOT useable as a crystal oscillator.
Pinout: 14–Lead Package (Top View)
VCC NC TANK NC BIAS NC VEE
14 13 12 11 10 9 8
MC1648
VOLTAGE
CONTROLLED
OSCILLATOR
L SUFFIX
14–LEAD CERAMIC PACKAGE
CASE 632–08
Not Recommended for New Designs
1234567
VCC NC OUT NC AGC NC VEE
Pin assignment is for Dual–in–Line Package.
For PLCC pin assignment, see the MC1648 Non–Standard Pin Conversion Table below.
P SUFFIX
14–LEAD PLASTIC PACKAGE
CASE 646–06
MC1648 NON–STANDARD PIN CONVERSION DATA
Package TANK VCC
8D 1 2
VCC
3
OUT
4
AGC
5
VEE
6
VEE
7
BIAS
8
14 L,P
12 14
1
3
5
7
8 10
20FN
18 20
2
4
*NOTE – All unused pins are not connected.
8
10 12 14
Supply Voltage
+5.0Vdc
–5.2Vdc
GND Pins
7,8
1,14
Supply Pins
1,14
7,8
D SUFFIX
8–PIN PLASTIC SOIC PACKAGE
CASE 751–05
FN SUFFIX
20–LEAD PLCC PACKAGE
CASE 775–02
LOGIC DIAGRAM
BIAS POINT 10
TANK 12
3
OUTPUT
5
AGC
• Input Capacitance = 6.0pF (TYP)
• Maximum Series Resistance for L (External Inductance) = 50Ω (TYP)
• Power Dissipation = 150mW (TYP)/Pkg (+5.0Vdc Supply)
• Maximum Output Frequency = 225MHz (TYP)
VCC1 = Pin 1
VCC2 = Pin 14
VEE = Pin 7
1/97
© Motorola, Inc. 1997
1
REV 2
MC1648
VCC2
14
VCC1
1
Q11 Q10
D2
Q9
Q3 Q2
Q4
Q7 Q6
D1
Q5
Q8
Q1
3
OUTPUT
7
VEE1
10
BIAS
POINT
12
TANK
85
VEE AGC
Figure 1. Circuit Schematic
TEST VOLTAGE/CURRENT VALUES
@ Test
Temperature
VIHmax
(Volts)
VILmin
VCC
mAdc
IL
MC1648
–30°C
+2.0
+1.5
+5.0
–5.0
+25°C
+1.85
+1.35
+5.0
–5.0
+85°C
+1.7
+1.2
+5.0
–5.0
Note: SOIC “D” package guaranteed –30°C to +70°C only
ELECTRICAL CHARACTERISTICS (Supply Voltage = +5.0V)
–30°C
+25°C
+85°C
Symbol
Characteristic
Min Max Min Max Min Max Unit
Condition
IE
VOH
VOL
VBIAS1
Power Supply Drain Current
Logic “1” Output Voltage
Logic “0” Output Voltage
Bias Voltage
– ––
3.955 4.185 4.04
3.16 3.4
3.2
1.6 1.9 1.45
Min Typ Max Min
41 –
4.25 4.11
3.43 3.22
1.75 1.3
Typ Max Min
– mAdc Inputs and outputs open
4.36 Vdc VILmin to Pin 12, IL @ Pin 3
3.475 Vdc VIHmax to Pin 12, IL @ Pin 3
1.6 Vdc VILmin to Pin 12
Typ Max Unit
Condition
VP–P Peak–to–Peak Tank Voltage – – – – 400 – – – – mV See Figure 3
Vdc Output Duty Cycle
– – – – 50 – – – – %
fmax2 Oscillation Frequency
– 225 – 200 225 –
– 225 – MHz
1. This measurement guarantees the dc potential at the bias point for purposes of incorporating a varactor tuning diode at this point.
2. Frequency variation over temperature is a direct function of the ∆C/∆ Temperature and ∆L/∆ Temperature.
MOTOROLA
2 HIPERCOMM
BR1334 — Rev 4
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MC1648 oscillator
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