Motorola MC12098D Datasheet
SEMICONDUCTOR
TECHNICAL DATA
MECL PLL COMPONENTS
÷8192 PRESCALER
Order this document by MC12098/D
Device
Operating
Temperature Range
Package
ORDERING INFORMATION
MC12098D TA = –40° to +85°C SO–8
PIN CONNECTIONS
D SUFFIX
PLASTIC PACKAGE
CASE 751
(SO–8)
1
8
NC
(Top View)
8
Gnd
IN
IN
V
CC
OUT
V
CCO
GndO
7
6
5
1
2
3
4
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.
• 2.5 GHz Toggle Frequency
• Supply Voltage 2.7 to 5.5 V
• Low Power Dissipation 18 mW Typical
• Operating Temperature Range of –40 to 85°C
MAXIMUM RATINGS
Parameter Symbol Value Unit
Power Supply Voltage, Pin 4 V
CC
–0.5 to 6.0 VDC
Operating Temperature Range T
A
–40 to 85 °C
Storage Temperature Range Tstg –65 to 150 °C
Maximum Output Current, Pin 7 I
O
4.0 mA
NOTE: ESD data available upon request.
ELECTRICAL CHARACTERISTICS (V
CC
= 2.7 to 5.5 V; TA = –40 to 85°C,
unless otherwise noted.)
Parameter
Symbol Min Typ Max Unit
Toggle Frequency (Sine Wave) ft 0.5 3.0 2.5 GHz
Supply Current Output (Pin 4) I
CC
- 3.6 6.5 mA
Input Voltage Sensitivity
500–2500 MHz
V
in
140 - 1000
mVpp
Output Voltage Swing (Note 1) V
out
0.8 1.1 - V
pp
NOTE: 1.Assumes CL = 12 pF
Motorola, Inc. 1997 Rev 2
MC12098
2
MOTOROLA RF/IF DEVICE DATA
Figure 1. MC12098 Block Diagram
÷
8192
V
CCO
OUT
11 k
Ω
V
REF
IN
IN
GND
5000
Ω
5000
Ω
V
REF
≈ 2.0 V @ VCC = 3.0 V
V
REF
≈
3.5 V @ VCC = 5.0 V
V
CC
GNDO
Figure 2. AC Test Circuit
SINE WAVE GENERATOR
50
Ω
C1
C2
C3
VCC = 2.7 to 5.5 V
C
L
V
CC
IN
IN
GND
OUT
EXTERNAL COMPONENTS
C1 = C2 = 1000 pF
C3 = 0.1
µ
F
CL = 12 pF (Including Scope and Jig Capacitance)
GNDO
V
CCO
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