Integrated
Circuit
Systems, Inc.
ICS84330
700MH
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
•
One
differential 3.3V LVPECL output
•
Crystal oscillator interface: 10MHz to 25MHz
•
Output frequency range: 31.25MHz to 700MHz
•
VCO range: 250MHz to 700MHz
•
Parallel or serial interface for programming M and N
dividers during power-up
•
RMS Period jitter: 5ps (maximum)
•
Cycle-to-cycle jitter: 40ps (maximum)
•
3.3V supply voltage
•
0°C to 70°C ambient operating temperature
•
Available in both standard and lead-free RoHS compliant
packages
•
Industrial temperature information available upon request
G
ENERAL
D
ESCRIPTION
The ICS84330 is a general purpose, single output
high frequency synthesizer and a member of the
HiPerClockS™
HiPerClockS™ family of High Performance Clock
Solutions from ICS. The VCO operates at a fre-
quency range of 250MHz to 700MHz. The VCO and
output frequency can be programmed using the serial or parallel
interfaces to the configuration logic. The output can be config-
ured to divide the VCO frequency by 1, 2, 4, and 8. Output fre-
quency steps from 250kHz to 2MHz can be achieved using a
16MHz crystal depending on the output divider setting.
IC
S
B
LOCK
D
IAGRAM
OE
XTAL_IN
OSC
XTAL_OUT
FREF_EXT
0
÷
16
XTAL_SEL
1
P
IN
A
SSIGNMENT
V
CC
nFOUT
25 24 23 22 21 20 19
S_CLOCK
S_DATA
S_LOAD
V
CCA
FREF_EXT
XTAL_SEL
26
27
28
18
N1
N0
M8
M7
M6
M5
M4
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
FOUT
TEST
V
CC
V
EE
ICS84330
V
EE
17
PLL
PHASE DETECTOR
1
VCO
÷
M
÷
2
0
÷
2
÷
4
÷
8
÷
1
XTAL_IN
12
7
nP_LOAD
8
M0
9 10 11
M1
M2
M3
FOUT
nFOUT
XTAL_OUT
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
XTAL_IN
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
ICS84330
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
XTAL_OUT
OE
nP_LOAD
M0
M1
M2
M3
nc
84330BV
www.icst.com/products/hiperclocks.html
1
REV. C MAY 16, 2006
Integrated
Circuit
Systems, Inc.
F
UNCTIONAL
D
ESCRIPTION
ICS84330
700MH
Z
, L
OW
J
ITTER
, C
RYSTAL
-
TO
-3.3V
D
IFFERENTIAL
LVPECL F
REQUENCY
S
YNTHESIZER
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 operating in the
parallel input mode. The relationship between the VCO frequency,
the crystal frequency and the M divider is defined as follows:
fxtal x
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
≤
350. 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:
fOUT
fOUT
fOUT
fOUT
fOUT
fOUT
fOUT
S_CLOCK ÷ N divider
fOUT
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 ICS84330 features a fully integrated PLL and therefore
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 700MHz. 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 ICS84330 support two input
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 N0 through
N1 is passed directly to the M divider and N output divider. On
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
t
T2
S
T1
H
T0
N1
N0
M8
M7
M6
M5
M4
M3
M2
M1
M0
t
S_LOAD
nP_LOAD
t
S
P
ARALLEL
L
OADING
M0:M8, N0:N1
nP_LOAD
t
S
M, N
t
H
S_LOAD
Time
F
IGURE
1. P
ARALLEL
& S
ERIAL
L
OAD
O
PERATIONS
84330BV
www.icst.com/products/hiperclocks.html
2
REV. C MAY 16, 2006
Integrated
Circuit
Systems, Inc.
ICS84330
700MH
Z
, L
OW
J
ITTER
, C
RYSTAL
-
TO
-3.3V
D
IFFERENTIAL
LVPECL F
REQUENCY
S
YNTHESIZER
Description
Analog supply pin.
Crystal oscillator interface. XTAL_IN is an oscillator input.
XTAL_OUT 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.
LVCMOS / LVTTL interface levels.
Core supply pins.
T
ABLE
1. P
IN
D
ESCRIPTIONS
Name
V
CCA
XTAL_IN,
XTAL_OUT
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
Power
Type
Input
Input
Input
Pullup
Pullup
Pullup
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
84330BV
www.icst.com/products/hiperclocks.html
3
REV. C MAY 16, 2006
Integrated
Circuit
Systems, Inc.
ICS84330
700MH
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
L
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
VCO Frequency
(MHz)
250
252
254
256
•
•
696
698
700
M Divide
125
126
127
128
•
•
348
349
350
256
M8
0
0
0
0
•
•
1
1
1
128
M7
0
0
0
1
•
•
0
0
0
64
M6
1
1
1
0
•
•
1
1
1
32
M5
1
1
1
0
•
•
0
0
0
16
M4
1
1
1
0
•
•
1
1
1
8
M3
1
1
1
0
•
•
1
1
1
4
M2
1
1
1
0
•
•
1
1
1
2
M1
0
1
1
0
•
•
0
0
1
1
M0
1
0
1
0
•
•
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
12 5
62.5
31.25
250
Maximum
350
175
87.5
700
84330BV
www.icst.com/products/hiperclocks.html
4
REV. C MAY 16, 2006
Integrated
Circuit
Systems, Inc.
ICS84330
700MH
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
47.9°C/W (0 lfpm)
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
32 Lead LQFP
28 Lead PLCC
Storage Temperature, T
STG
T
ABLE
4A. DC P
OWER
S
UPPLY
C
HARACTERISTICS
,
V
CC
= V
CCA
= 3.3V±5%, T
A
= 0°C
TO
70°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
130
15
Units
V
V
mA
mA
T
ABLE
4B. LVCMOS / LVTTL DC C
HARACTERISTICS
,
V
CC
= V
CCA
= 3.3V±5%, T
A
= 0°C
TO
70°C
Symbol
V
IH
V
IL
Parameter
Input High Voltage
Input Low Voltage
M0-M8, N0, N1,
OE, nP_LOAD,
XTAL_SEL
Input High Current
S_LOAD, S_CLOCK
FREF_EXT, S_DATA
M0-M8, N0, N1,
OE, nP_LOAD,
XTAL_SEL
Input Low Current
S_LOAD, S_CLOCK
FREF_EXT, S_DATA
Output High Voltage; NOTE 1
Output Low Voltage; NOTE 1
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
2.6
0.5
Test Conditions
Minimum Typical
2
-0.3
Maximum
V
CC
+ 0.3
0.8
5
150
Units
V
V
µA
µA
µA
µA
V
V
I
IH
I
IL
V
OH
V
OL
NOTE 1: Outputs terminated with 50
Ω
to V
CC
/2.
T
ABLE
4C. LVPECL DC C
HARACTERISTICS
,
V
CC
= V
CCA
= 3.3V±5%, T
A
= 0°C
TO
70°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
- 1.0
V
CC
- 1.7
1.0
Units
V
V
V
NOTE 1: Outputs terminated with 50
Ω
to V
CC
- 2V.
84330BV
www.icst.com/products/hiperclocks.html
5
REV. C MAY 16, 2006
FPGA/CPLD
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
