MC12028AD
Order this document by MC12028A/D
SEMICONDUCTOR
TECHNICAL DATA
MECL PLL COMPONENTS
÷64/65, ÷128/129
DUAL MODULUS PRESCALER
P SUFFIX
PLASTIC PACKAGE
CASE 626
PIN CONNECTIONS
D SUFFIX
PLASTIC PACKAGE
CASE 751
(SO–8)
8
1
1
8
IN
(Top View)
8
IN
V
CC
SW
OUT
NC
MC
Gnd
7
6
5
1
2
3
4
Device
Operating
Temp Range
Package
ORDERING INFORMATION
MC12028AD
MC12028AP
T
A
=–40° to +85°C
SO–8
Plastic
MC12028BD
MC120228BP
SO–8
Plastic
The MC12028A can be used with CMOS synthesizers requiring positive
edges to trigger internal counters such as Motorola’s MC145XXX series in a
PLL to provide tuning signals up to 1.1 GHz in programmable frequency
steps.
The MC12028B can be used with CMOS synthesizers requiring negative
edges to trigger internal counters.
A Divide Ratio Control (SW) permits selection of a 32/33 or 64/65 divide
ratio as desired.
The Modulus Control (MC) selects the proper divide number after SW has
been biased to select the desired divide ratio.
NOTE: The “B” Version Is Not Recommended for New Designs
• 1.1 GHz Toggle Frequency
• MC12028A for Positive Edge Triggered Synthesizers
• 6.5 mA Maximum, –40 to 85°C, V
CC
= 5.5 Vdc
• Modulus Control Input Level Is Compatible With
Standard CMOS and TTL
• Low–Power 4.0 mA Typical
FUNCTIONAL TABLE
SW MC Divide Ratio
H H 32
H L 33
L H 64
L L 65
NOTES: 1.SW: H = V
CC
, L = Open. A logic L can also be applied by grouunding this pin,
but this is not recommended due to increased power soncumption.
2.MC: H = 2.0 V to V
CC
, L = GND to 0.8 V.
DESIGN GUIDE
Criteria Value Unit
Internal Gate Count* 67 ea
Internal Gate Propagation Delay 200 ps
Internal Gate Power Dissipation 0.75 mW
Speed Power Product 0.15 pJ
NOTE: * Equivalent to a two–input NAND gate
MAXIMUM RATINGS
Characteristic Symbol Range Unit
Power Supply Voltage, Pin 2 V
CC
–0.5 to 7.0 Vdc
Operating Temperature Range T
A
–40 to 85 °C
Storage Temperature Range T
stg
–65 to 150 °C
Modulus Control Input, Pin 6 MC –0.5 to 6.5 Vdc
NOTE: ESD data available upon request.
Motorola, Inc. 1997 Rev 3
MC12028A MC12028B
2
MOTOROLA RF/IF DEVICE DATA
ELECTRICAL CHARACTERISTICS
(V
CC
= 4.5 to 5.5V; T
A
= –40 to 85°C, unless otherwise noted.)
Characteristic
Symbol Min Typ Max Unit
Toggle Frequency (Sine Wave Input) f
t
0.1 1.4 1.1 GHz
Supply Current Output Unloaded (Pin 2) I
CC
– 4.0 6.5 mA
Modulus Control Input High (MC) V
IH1
2.0 – V
CC
V
Modulus Control Input Low (MC) V
IL1
– – 0.8 V
Divide Ratio Control Input High (SW) V
IH2
V
CC
V
CC
V
CC
Vdc
Divide Ratio Control Input Low (SW) V
IL2
Open Open Open —
Output Voltage Swing (C
L
= 12 pF; R
L
= 2.2 kΩ) V
out
1.0 1.6 V
pp
Modulus Setup Time MC to Out t
set
– 11 16 ns
Input Voltage Sensitivity 250–1100 MHz
100–250 MHz
V
in
100
400
–
–
1500
1500
mVpp
Output Current (C
L
= 12 pF; R
L
= 2.2 kΩ) I
O
– 1.5 4.0 mA
A
HGFED
In
MC
In
SW
Out
Q
S
Q
C
QBD
QC
QBD
QBC
QD
C
QBD
QBC
QD
QBC
QD
B
QBC
QD
C
QB
C
QD
M
Modulus setup time MC to out is the MC
setup or MC release plus the prop delay.
Prop. Delay
In
Out
MC
MC Setup
MC Release
Figure 1. Logic Diagram (MC12028A) Figure 2. Modulus Setup Time
Figure 3. Typical Output Waveform
500 m
20 ns
≈
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