Integrated
Circuit
Systems, Inc.
ICS84330CI
720MH
Z
, L
OW
J
ITTER
, C
RYSTAL
-
TO
-3.3V
D
IFFERENTIAL
LVPECL F
REQUENCY
S
YNTHESIZER
F
EATURES
•
Fully integrated PLL, no external loop filter requirements
•
1 differential 3.3V LVPECL output
•
Crystal oscillator interface: 10MHz to 25MHz
•
Output frequency range: 31.25MHz to 720MHz
•
VCO range: 250MHz to 720MHz
•
Parallel or serial interface for programming M and N dividers
during power-up
•
RMS Period jitter: 6ps (maximum)
•
Cycle-to-cycle jitter: 40ps (maximum)
•
3.3V supply voltage
•
-40°C to 85°C ambient operating temperature
•
Pin compatible with the MC12430
G
ENERAL
D
ESCRIPTION
The ICS84330CI is a general purpose, single out-
put high frequency synthesizer and a member of
HiPerClockS™
the HiPerClockS™ family of High Performance
Clock Solutions from ICS. The VCO operates at a
frequency range of 250MHz to 720MHz. The VCO
and output frequency can be programmed using the serial or
parallel interfaces to the configuration logic. The output can be
configured to divide the VCO frequency by 1, 2, 4, and 8. Output
frequency steps from 250KHz to 2MHz can be achieved using
a 16MHz crystal depending on the output divider setting.
ICS
B
LOCK
D
IAGRAM
OE
P
IN
A
SSIGNMENT
FOUT
V
CC
25 24 23 22 21 20 19
S_CLOCK
OSC
1
nFOUT
TEST
V
CC
V
EE
V
EE
XTAL1
XTAL2
FREF_EXT
0
26
27
28
18
N1
N0
M8
M7
M6
M5
M4
S_DATA
S_LOAD
÷
16
V
CCA
FREF_EXT
XTAL_SEL
ICS84330CI
17
XTAL_SEL
16
28-Lead PLCC
V Package
1
15
11.6mm x 11.4mm x 4.1mm
2
14
body package
3
13
Top View
4
5
6
OE
PLL
PHASE DETECTOR
1
÷
2
÷
4
÷
8
÷
1
XTAL1
12
7
nP_LOAD
8
M0
9 10 11
M1
M2
M3
VCO
÷
M
÷
2
0
FOUT
nFOUT
XTAL2
nFOUT
S_LOAD
S_DATA
S_CLOCK
nP_LOAD
M0:M8
N0:N1
FOUT
TEST
CONFIGURATION
INTERFACE
LOGIC
V
CC
V
CC
V
CC
V
EE
V
EE
TEST
S_CLOCK
S_DATA
S_LOAD
V
CCA
V
CCA
FREF_EXT
XTAL_SEL
XTAL1
1
2
3
4
5
6
7
8
32 31 30 29 28 27 26 25
24
n/c
N1
N0
M8
M7
M6
M5
M4
ICS84330CI
32-Lead LQFP
Y package
7mm x 7mm x 1.4mm
body package
Top View
23
22
21
20
19
18
17
9 10 11 12 13 14 15 16
XTAL2
OE
nP_LOAD
M0
M1
M2
M3
nc
84330CVI
www.icst.com/products/hiperclocks.html
1
REV. A DECEMBER 7, 2004
Integrated
Circuit
Systems, Inc.
ICS84330CI
720MH
Z
, L
OW
J
ITTER
, C
RYSTAL
-
TO
-3.3V
D
IFFERENTIAL
LVPECL F
REQUENCY
S
YNTHESIZER
N0 through N1 is passed directly to the M divider and N output
divider. On the LOW-to-HIGH transition of the nP_LOAD input,
the data is latched and the M divider remains loaded until the
next LOW transition on nP_LOAD or until a serial event occurs.
The TEST output is Mode 000 (shift register out) when operat-
ing in the parallel input mode. The relationship between the VCO
frequency, the crystal frequency and the M divider is defined as
fxtal x
follows:
fVCO =
2M
16
The M value and the required values of M0 through M8 are
shown in Table 3B, Programmable VCO Frequency Function
Table. Valid M values for which the PLL will achieve lock are
defined as 125
≤
M
≤
360. The frequency out is defined as
follows:
fout = fVCO = fxtal x 2M
N
N
16
Serial operation occurs when nP_LOAD is HIGH and S_LOAD
is LOW. The shift register is loaded by sampling the S_DATA
bits with the rising edge of S_CLOCK. The contents of the
shift register are loaded into the M divider when S_LOAD tran-
sitions from LOW-to-HIGH. The M divide and N output divide
values are latched on the HIGH-to-LOW transition of S_LOAD.
If S_LOAD is held HIGH, data at the S_DATA input is passed
directly to the M divider on each rising edge of S_CLOCK.
The serial mode can be used to program the M and N bits and
test bits T2:T0. The internal registers T2:T0 determine the state
of the TEST output as follows in the table below:
fOUT
fOUT
fOUT
fOUT
fOUT
fOUT
fOUT
S_CLOCK ÷ N divider
fOUT
F
UNCTIONAL
D
ESCRIPTION
NOTE: The functional description that follows describes op-
eration using a 16MHz crystal. Valid PLL loop divider values
for different crystal or input frequencies are defined in the In-
put Frequency Characteristics, Table 6, NOTE 1.
The ICS84330CI features a fully integrated PLL and there-
fore requires no external components for setting the loop band-
width. A quartz crystal is used as the input to the on-chip
oscillator. The output of the oscillator is divided by 16 prior to
the phase detector. With a 16MHz crystal this provides a 1MHz
reference frequency. The VCO of the PLL operates over a
range of 250MHz to 720MHz. The output of the M divider is
also applied to the phase detector.
The phase detector and the M divider force the VCO output fre-
quency to be 2M times the reference frequency by adjusting the
VCO control voltage. Note that for some values of M (either too
high or too low), the PLL will not achieve lock. The output of the
VCO is scaled by a divider prior to being sent to each of the LVPECL
output buffers. The divider provides a 50% output duty cycle.
The programmable features of the ICS84330CI support two in-
put modes to program the M divider and N output divider. The
two input operational modes are parallel and serial.
Figure 1
shows the timing diagram for each mode. In parallel mode the
nP_LOAD input is LOW. The data on inputs M0 through M8 and
T2
0
0
0
0
1
1
1
1
T1
0
0
1
1
0
0
1
1
T0
0
1
0
1
0
1
0
1
TEST Output
Shift Register Out
High
PLL Reference Xtal ÷ 16
(VCO ÷ M) /2 (non 50% Duty Cycle M divider)
fOUT
LVCMOS Output Frequency < 200MHz
Low
(S_CLOCK ÷ M) /2 (non 50% Duty Cycle M divider)
fOUT ÷ 4
S
ERIAL
L
OADING
S_CLOCK
S_DATA
T2
T1
H
T0
N1
N0
M8
M7
M6
M5
M4
M3
M2
M1
M0
t
S_LOAD
S
t
nP_LOAD
t
S
P
ARALLEL
L
OADING
M0:M8, N0:N1
M, N
nP_LOAD
t
S
t
H
Time
F
IGURE
1. P
ARALLEL
& S
ERIAL
L
OAD
O
PERATIONS
84330CVI
www.icst.com/products/hiperclocks.html
2
REV. A DECEMBER 7, 2004
Integrated
Circuit
Systems, Inc.
ICS84330CI
720MH
Z
, L
OW
J
ITTER
, C
RYSTAL
-
TO
-3.3V
D
IFFERENTIAL
LVPECL F
REQUENCY
S
YNTHESIZER
Description
Analog supply pin.
Crystal oscillator interface. XTAL1 is an oscillator input.
XTAL2 is an oscillator output.
Selects between the crystal oscillator or FREF_EXT inputs as the PLL reference
source. Selects XTAL inputs when HIGH. Selects FREF_EXT when LOW.
LVCMOS / LVTTL interface levels.
Output enable. LVCMOS / LVTTL interface levels.
Parallel load input. Determines when data present at M8:M0 is loaded into
M divider, and when data present at N1:N0 sets the N output divide value.
LVCMOS / LVTTL interface levels.
M divider inputs. Data latched on LOW-to-HIGH transition of nP_LOAD input.
LVCMOS / LVTTL interface levels.
Determines N output divider value as defined in Table 3C Function Table.
LVCMOS / LVTTL interface levels.
Negative supply pins.
Test output which is used in the serial mode of operation.
Single-ended LVPECL interface levels.
Core supply pins.
T
ABLE
1. P
IN
D
ESCRIPTIONS
Name
V
CCA
XTAL1, XTAL2
XTAL_SEL
OE
nP_LOAD
M0, M1, M2
M3, M4, M5
M6, M7, M8
N0, N1
V
EE
TEST
V
CC
nFOUT, FOUT
nc
FREF_EXT
Input
Input
Input
Pullup
Pullup
Pullup
Power
Type
Input
Input
Power
Output
Power
Output
Unused
Input
Pullup
Pullup
Differential output for the synthesizer. 3.3V LVPECL interface levels.
Do not connect.
Pulldown PLL reference input. LVCMOS / LVTTL interface levels.
Clocks the serial data present at S_DATA input into the shift register on the
S_CLOCK
Input
Pulldown
rising edge of S_CLOCK. LVCMOS / LVTTL interface levels.
Shift register serial input. Data sampled on the rising edge of S_CLOCK.
S_DATA
Input
Pulldown
LVCMOS / LVTTL interface levels.
Controls transition of data from shift register into the M divider.
S_LOAD
Input
Pulldown
LVCMOS / LVTTL interface levels.
NOTE:
Pullup
and
Pulldown
refer to internal input resistors. See Table 2, Pin Characteristics, for typical values.
T
ABLE
2. P
IN
C
HARACTERISTICS
Symbol
C
IN
R
PULLUP
R
PULLDOWN
Parameter
Input Capacitance
Input Pullup Resistor
Input Pulldown Resistor
Test Conditions
Minimum
Typical
4
51
51
Maximum
Units
pF
KΩ
KΩ
84330CVI
www.icst.com/products/hiperclocks.html
3
REV. A DECEMBER 7, 2004
Integrated
Circuit
Systems, Inc.
ICS84330CI
720MH
Z
, L
OW
J
ITTER
, C
RYSTAL
-
TO
-3.3V
D
IFFERENTIAL
LVPECL F
REQUENCY
S
YNTHESIZER
T
ABLE
3A. P
ARALLEL
nP_LOAD
X
L
↑
H
H
H
H
M
X
Data
Data
X
X
X
X
AND
S
ERIAL
M
ODE
F
UNCTION
T
ABLE
Inputs
S_LOAD
X
X
X
L
↑
↓
L
S_CLOCK
X
X
X
↑
L
L
X
↑
S_DATA
X
X
X
Data
Data
Data
X
Data
Conditions
Reset. M and N bits are all set HIGH.
Data on M and N inputs passed directly to M divider and
N output divider. TEST mode 000.
Data is latched into input registers and remains loaded
until next LOW transition or until a serial event occurs.
Serial input mode. Shift register is loaded with data on
S_DATA on each rising edge of S_CLOCK.
Contents of the shift register are passed to the M divider
and N output divider.
M divide and N output divide values are latched.
Parallel or serial input do not affect shift registers.
S_DATA passed directly to M divider as it is clocked.
N
X
Data
Data
X
X
X
X
H
X
X
H
NOTE: L = LOW
H = HIGH
X = Don't care
↑
= Rising edge transition
↓
= Falling edge transition
T
ABLE
3B. P
ROGRAMMABLE
VCO F
REQUENCY
F
UNCTION
T
ABLE
(NOTE 1)
VCO Frequency
(MHz)
250
252
254
256
•
•
718
720
M Divide
125
126
127
128
•
•
359
360
256
M8
0
0
0
0
•
•
1
1
128
M7
0
0
0
1
•
•
0
0
64
M6
1
1
1
0
•
•
1
1
32
M5
1
1
1
0
•
•
1
1
16
M4
1
1
1
0
•
•
0
0
8
M3
1
1
1
0
•
•
0
1
4
M2
1
1
1
0
•
•
1
0
2
M1
0
1
0
1
•
•
1
0
1
M0
1
0
1
0
•
•
1
0
NOTE 1: These M divide values and the resulting frequencies correspond to a crystal frequency of 16MHz.
T
ABLE
3C. P
ROGRAMMABLE
O
UTPUT
D
IVIDER
F
UNCTION
T
ABLE
Inputs
N1
0
0
1
1
N0
0
1
0
1
N Divider Value
2
4
8
1
Output Frequency (MHz)
Minimum
125
62.5
31.25
250
Maximum
360
180
90
720
84330CVI
www.icst.com/products/hiperclocks.html
4
REV. A DECEMBER 7, 2004
Integrated
Circuit
Systems, Inc.
ICS84330CI
720MH
Z
, L
OW
J
ITTER
, C
RYSTAL
-
TO
-3.3V
D
IFFERENTIAL
LVPECL F
REQUENCY
S
YNTHESIZER
4.6V
-0.5V to V
CC
+ 0.5 V
50mA
100mA
37.8°C/W (0 lfpm)
-65°C to 150°C
NOTE: Stresses beyond those listed under Absolute
Maximum Ratings may cause permanent damage to the
device. These ratings are stress specifications only. Functional
operation of product at these conditions or any conditions be-
yond those listed in the
DC Characteristics
or
AC Character-
istics
is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect product reliability.
A
BSOLUTE
M
AXIMUM
R
ATINGS
Supply Voltage, V
CC
Inputs, V
I
Outputs, I
O
Continuous Current
Surge Current
Package Thermal Impedance,
θ
JA
Storage Temperature, T
STG
T
ABLE
4A. P
OWER
S
UPPLY
DC C
HARACTERISTICS
,
V
CC
= V
CCA
= 3.3V±5%, T
A
= -40°C
TO
85°C
Symbol
V
CC
V
CCA
I
CC
I
CCA
Parameter
Core Supply Voltage
Analog Supply Voltage
Power Supply Current
Analog Supply Current
Test Conditions
Minimum
3.135
3.135
Typical
3.3
3.3
Maximum
3.465
3.465
160
17
Units
V
V
mA
mA
T
ABLE
4B. LVCMOS / LVTTL DC C
HARACTERISTICS
,
V
CC
= V
CCA
= 3.3V±5%, T
A
= -40°C
TO
85°C
Symbol
V
IH
V
IL
Parameter
Input High Voltage
Input Low Voltage
M0-M8, N0, N1,
OE, nP_LOAD,
XTAL_SEL
S_LOAD, S_CLOCK
FREF_EXT, S_DATA
M0-M8, N0, N1,
OE, nP_LOAD,
XTAL_SEL
S_LOAD, S_CLOCK
FREF_EXT, S_DATA
V
CC
= V
IN
= 3.465V
V
CC
= V
IN
= 3.465V
V
CC
= 3.465V, V
IN
= 0V
V
CC
= 3.465V, V
IN
= 0V
-150
-5
Test Conditions
Minimum Typical
2
-0.3
Maximum
V
CC
+ 0.3
0.8
5
150
Units
V
V
µA
µA
µA
µA
I
IH
Input High Current
I
IL
Input Low Current
T
ABLE
4C. LVPECL DC C
HARACTERISTICS
,
V
CC
= V
CCA
= 3.3V±5%, T
A
= -40°C
TO
85°C
Symbol
V
OH
V
OL
V
SWING
Parameter
Output High Voltage; NOTE 1
Output Low Voltage; NOTE 1
Peak-to-Peak Output Voltage Swing
Test Conditions
Minimum
V
CC
- 1.4
V
CC
- 2.0
0.6
Typical
Maximum
V
CC
- 0.9
V
CC
- 1.7
1.0
Units
V
V
V
NOTE 1: Outputs terminated with 50
Ω
to V
CC
- 2V.
84330CVI
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5
REV. A DECEMBER 7, 2004
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