MOTOROLA MC12098

Order this document by MC12098/D
The MC12098 is a single modulus divide by 8192 prescaler for low power
frequency division of a 2.5 GHz high frequency input signal. The low power
(3.6 mA typical at 5.0 V) and high operating frequency features make this
prescaler ideal in satellite TV receiver applications.
The MC12098 is pin and functionally compatible to the Plessey SP4982,
but with significantly lower power consumption.
On-chip output termination provides 2.0 mA of output current to drive a
12 pF (typical) high impedance load. The output voltage swing under typical
supply voltage and temperature conditions is 1.1 V. If additional drive is
required for the prescaler output, an external resistor can be added in
parallel from the OUT pin to GND to increase the output power. Care must be
taken not to exceed the maximum allowable current through the output.
•
•
•
•
MECL PLL COMPONENTS
÷8192 PRESCALER
SEMICONDUCTOR
TECHNICAL DATA
2.5 GHz Toggle Frequency
Supply Voltage 2.7 to 5.5 V
Low Power Dissipation 18 mW Typical
8
Operating Temperature Range of –40 to 85°C
1
MAXIMUM RATINGS
Parameter
Symbol
Value
Unit
VCC
–0.5 to 6.0
VDC
TA
–40 to 85
°C
Tstg
–65 to 150
°C
IO
4.0
mA
Power Supply Voltage, Pin 4
Operating Temperature Range
Storage Temperature Range
Maximum Output Current, Pin 7
NOTE:
D SUFFIX
PLASTIC PACKAGE
CASE 751
(SO–8)
PIN CONNECTIONS
ESD data available upon request.
ELECTRICAL CHARACTERISTICS (VCC = 2.7 to 5.5 V; TA = –40 to 85°C,
unless otherwise noted.)
Symbol
Min
Typ
Max
Unit
Toggle Frequency (Sine Wave)
ft
0.5
3.0
2.5
GHz
Supply Current Output (Pin 4)
ICC
-
3.6
6.5
mA
Input Voltage Sensitivity
500–2500 MHz
Vin
140
-
1000
Output Voltage Swing (Note 1)
Vout
0.8
1.1
-
Parameter
NOTE:
Gnd
IN
IN
VCC
1
8
2
7
3
6
4
5
NC
OUT
VCCO
GndO
(Top View)
mVpp
Vpp
1. Assumes CL = 12 pF
ORDERING INFORMATION
Device
Operating
Temperature Range
Package
MC12098D
TA = –40° to +85°C
SO–8
 Motorola, Inc. 1997
Rev 2
MC12098
Figure 1. MC12098 Block Diagram
VCCO
VREF ≈ 2.0 V @ VCC = 3.0 V
VREF ≈ 3.5 V @ VCC = 5.0 V
11 kΩ
VCC
VREF
5000 Ω
÷8192
5000 Ω
OUT
IN
IN
GNDO
GND
Figure 2. AC Test Circuit
VCC = 2.7 to 5.5 V
C3
SINE WAVE GENERATOR
C1
VCCO
VCC
IN
50 Ω
C2
IN
OUT
GNDO
2
GND
CL
EXTERNAL COMPONENTS
C1 = C2 = 1000 pF
C3 = 0.1 µF
CL = 12 pF (Including Scope and Jig Capacitance)
MOTOROLA RF/IF DEVICE DATA
MC12098
Figure 3. MC12098 Input Signal Amplitude versus Input Frequency
(VCC = 5.5 V, TA = 25°C)
MOTOROLA RF/IF DEVICE DATA
3
MC12098
Figure 4. Input Impedance versus Frequency
55
45
R (Ohms)
35
25
15
5
300
500
700
900
1100
1300
1500
1700
1900
2100
2300
2500
2700
2300
2500
2700
Input Frequency (MHz)
Figure 5. Input Impedance versus Frequency
50
0
–50
–100
jX (Ohms)
–150
–200
–250
–300
–350
–400
–450
300
500
700
900
1100
1300
1500
1700
1900
2100
Input Frequency (MHz)
4
MOTOROLA RF/IF DEVICE DATA
MC12098
OUTLINE DIMENSIONS
D SUFFIX
PLASTIC PACKAGE
CASE 751–06
(SO–8)
ISSUE T
D
A
8
NOTES:
1. DIMENSIONING AND TOLERANCING PER ASME
Y14.5M, 1994.
2. DIMENSIONS ARE IN MILLIMETER.
3. DIMENSION D AND E DO NOT INCLUDE MOLD
PROTRUSION.
4. MAXIMUM MOLD PROTRUSION 0.15 PER SIDE.
5. DIMENSION B DOES NOT INCLUDE DAMBAR
PROTRUSION. ALLOWABLE DAMBAR
PROTRUSION SHALL BE 0.127 TOTAL IN EXCESS
OF THE B DIMENSION AT MAXIMUM MATERIAL
CONDITION.
C
5
0.25
H
E
M
B
M
1
4
h
B
X 45 _
e
q
A
C
SEATING
PLANE
L
0.10
A1
B
0.25
M
C B
S
A
S
DIM
A
A1
B
C
D
E
e
H
h
L
q
MILLIMETERS
MIN
MAX
1.35
1.75
0.10
0.25
0.35
0.49
0.19
0.25
4.80
5.00
3.80
4.00
1.27 BSC
5.80
6.20
0.25
0.50
0.40
1.25
0_
7_
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MOTOROLA RF/IF DEVICE DATA◊
MC12098/D
5