ICS84330AYLF [IDT]
Clock Generator, 700MHz, PQFP32, 7 X 7 MM, 1.40 MM HEIGHT, LQFP-32;
| 型号： | ICS84330AYLF |
| 厂家： | 
INTEGRATED DEVICE TECHNOLOGY |
| 描述： | Clock Generator, 700MHz, PQFP32, 7 X 7 MM, 1.40 MM HEIGHT, LQFP-32 |
| 文件： | 总16页 (文件大小：168K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
PRELIMINARY
ICS84330
Integrated
Circuit
Systems, Incꢀ
700MHZ, LOW JITTER, CRYSTAL-TO-3.3V
DIFFERENTIAL LVPECL FREQUENCY SYNTHESIZER
GENERAL DESCRIPTION
FEATURES
The ICS84330 is a general purpose, single output • Fully integrated PLL, no external loop filter requirements
high frequency synthesizer and a member of the
HiPerClockS™ family of High Performance Clock
• Crystal oscillator interface: 10MHz to 25MHz
Solutions from ICS. The VCO operates at a fre-
• 1 differential 3.3V LVPECLoutput
HiPerClockS™
• Output frequency range: 25MHz to 700MHz
quency range of 200MHz to 700MHz. 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. Out-
put frequency steps from 250KHz to 2MHz can be achieved
using a 16MHz crystal depending on the output divider setting.
• VCO range: 200MHz to 700MHz
• Parallel or serial interface for programming M and N dividers
during power-up
• RMS Period jitter: TBD
• Cycle-to-cycle jitter: 35ps (maximum)
• 3.3V supply voltage
• 0°C to 70°C ambient operating temperature
• Pin compatible with the MC12430
PIN ASSIGNMENT
BLOCK DIAGRAM
25 24 23 22 21 20 19
OE
XTAL1
S_CLOCK
26
18
N1
N0
M8
M7
M6
M5
M4
1
0
OSC
S_DATA
S_LOAD
VCCA
27
28
1
17
16
15
14
13
12
XTAL2
ICS84330
28-Lead PLCC
V Package
FREF_EXT
÷ 16
FREF_EXT
XTAL_SEL
2
11.6mm x 11.4mm x 4.1mm
body package
XTAL_SEL
3
XTAL1
Top View
4
PLL
PHASE DETECTOR
5
6
7
8
9 10 11
1
0
FOUT
nFOUT
VCO
÷ 2
÷ N
÷ M
S_LOAD
S_DATA
S_CLOCK
nP_LOAD
CONFIGURATION
INTERFACE
LOGIC
TEST
32 31 30 29 28 27 26 25
24
1
2
3
4
5
6
7
8
S_CLOCK
n/c
N1
N0
M8
M7
M6
M5
M4
23
22
21
20
19
18
17
S_DATA
S_LOAD
VCCA
M0:M8
N0:N1
ICS84330
32-Lead LQFP
Y package
VCCA
7mm x 7mm x 1.4mm
body package
Top View
FREF_EXT
XTAL_SEL
XTAL1
9
10 11 12 13 14 15 16
The Preliminary Information presented herein represents a product in prototyping or pre-production. The noted characteristics are based on initial
product characterization. Integrated Circuit Systems, Incorporated (ICS) reserves the right to change any circuitry or specifications without notice.
84330AV
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REV. B AUGUST 30, 2002
1
PRELIMINARY
ICS84330
Integrated
Circuit
Systems, Incꢀ
700MHZ, LOW JITTER, CRYSTAL-TO-3.3V
DIFFERENTIAL LVPECL FREQUENCY SYNTHESIZER
FUNCTIONAL DESCRIPTION
NOTE: The functional description that follows describes operation using a 16MHz crystal. Valid PLL loop divider values for
different crystal or input frequencies are defined in the Input Frequency Characteristics, Table 6, NOTE 1.
The ICS84330 features a fully integrated PLL and therefore requires no external components for setting the loop bandwidth.
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
200MHz 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 frequency 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 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 100 ≤ M ≤ 350. The frequency out is defined as follows:
fVCO fxtal 2M
fout
x
=
=
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
transitions 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:
T2
0
T1
0
T0
0
TEST Output
Shift Register Out
fOUT
fOUT
0
0
0
0
1
1
1
0
1
High
fOUT
fOUT
fOUT
PLL Reference Xtal ÷ 16
(VCO ÷ M) /2 (non 50% Duty M divider)
1
0
0
fOUT
fOUT
LVCMOS Output Frequency < 200MHz
1
1
1
0
1
1
1
0
1
Low
(S_CLOCK ÷ M) /2 (non 50% Duty Cycle M divider)
fOUT ÷ 4
fOUT
S_CLOCK ÷ N divider
fOUT
S
ERIAL LOADING
S_CLOCK
S_DATA
T2
T1
T0
N1
N0
M8
M7
M6
M5
M4 M3
M2
M1
M0
t
t
H
S
S_LOAD
t
nP_LOAD
S
P
ARALLEL LOADING
M, N
M0:M8, N0:N1
nP_LOAD
t
t
H
Time
S
FIGURE 1 - PARALLEL & SERIAL LOAD OPERATIONS
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84330AV
REV. B AUGUST 30, 2002
2
PRELIMINARY
ICS84330
Integrated
Circuit
Systems, Incꢀ
700MHZ, LOW JITTER, CRYSTAL-TO-3.3V
DIFFERENTIAL LVPECL FREQUENCY SYNTHESIZER
TABLE 1. PIN DESCRIPTIONS
Name
VCCA
Type
Description
Power
Input
Analog supply pin.
XTAL1, XTAL2
Crystal oscillator inputs.
Selects between the crystal or FREF_EXT inputs as the PLL reference source.
Selects XTAL inputs when HIGH. Selects FREF_EXT when LOW.
LVCMOS / LVTTL interface levels.
XTAL_SEL
OE
Input
Input
Input
Pullup
Pullup
Pullup
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.
nP_LOAD
M0, M1, M2
M3, M4, M5
M6, M7, M8
M divider inputs. Data latched on LOW-to-HIGH transition of nP_LOAD input.
LVCMOS / LVTTL interface levels.
Input
Pullup
Pullup
Determines N output divider value as defined in Table 3C Function Table.
LVCMOS / LVTTL interface levels.
N0, N1
VEE
Input
Power
Output
Negative supply pins.
Test output which is used in the serial mode of operation.
LVCMOS / LVTTL interface levels.
TEST
VCC
nFOUT, FOUT
nc
Power
Output
Unused
Input
Positive supply pins.
Differential output for the synthesizer. 3.3V LVPECL interface levels.
Do not connect.
FREF_EXT
Pulldown PLL reference input. LVCMOS / LVTTL interface levels.
Clocks the serial data present at S_DATA input into the shift register on the
Pulldown
S_CLOCK
S_DATA
Input
Input
Input
rising edge of S_CLOCK. LVCMOS / LVTTL interface levels.
Shift register serial input. Data sampled on the rising edge of S_CLOCK.
LVCMOS / LVTTL interface levels.
Pulldown
Controls transition of data from shift register into the M divider.
LVCMOS / LVTTL interface levels.
S_LOAD
Pulldown
NOTE: Pullup and Pulldown refer to internal input resistors. See Table 2, Pin Characteristics, for typical values.
TABLE 2. PIN CHARACTERISTICS
Symbol
CIN
Parameter
Test Conditions
Minimum Typical Maximum Units
Input Capacitance
Input Pullup Resistor
4
pF
KΩ
KΩ
RPULLUP
51
51
RPULLDOWN Input Pulldown Resistor
84330AV
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REV. B AUGUST 30, 2002
3
PRELIMINARY
ICS84330
Integrated
Circuit
Systems, Incꢀ
700MHZ, LOW JITTER, CRYSTAL-TO-3.3V
DIFFERENTIAL LVPECL FREQUENCY SYNTHESIZER
TABLE 3A. PARALLEL AND SERIAL MODE FUNCTION TABLE
Inputs
Conditions
nP_LOAD
M
N
S_LOAD S_CLOCK S_DATA
X
X
X
X
X
X
X
X
X
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.
L
↑
Data Data
Data Data
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.
X
L
↑
X
↑
X
H
H
X
X
X
X
Data
Data
L
H
H
H
X
X
X
X
X
X
↓
L
L
X
↑
Data
X
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.
H
Data
NOTE: L = LOW
H = HIGH
X = Don't care
↑ = Rising edge transition
↓ = Falling edge transition
TABLE 3B. PROGRAMMABLE VCO FREQUENCY FUNCTION TABLE
256
M8
0
128
M7
0
64
M6
1
32
M5
1
16
M4
0
8
M3
0
4
M2
1
2
M1
0
1
M0
0
VCO Frequency
(MHz)
M Divide
200
202
204
206
•
100
101
102
103
•
0
0
1
1
0
0
1
0
1
0
0
1
1
0
0
1
1
0
0
0
1
1
0
0
1
1
1
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
696
698
700
348
349
350
1
0
1
0
1
1
1
0
0
1
0
1
0
1
1
1
0
1
1
0
1
0
1
1
1
1
0
NOTE 1: These M divide values and the resulting frequencies correspond to a crystal frequency of 16MHz.
TABLE 3C. PROGRAMMABLE OUTPUT DIVIDER FUNCTION TABLE
Inputs
Output Frequency (MHz)
N Divider Value
N1
0
N0
0
Minimum
100
Maximum
350
2
4
8
1
0
1
50
175
1
0
25
87.5
1
1
200
700
84330AV
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REV. B AUGUST 30, 2002
4
PRELIMINARY
ICS84330
Integrated
Circuit
Systems, Incꢀ
700MHZ, LOW JITTER, CRYSTAL-TO-3.3V
DIFFERENTIAL LVPECL FREQUENCY SYNTHESIZER
ABSOLUTE MAXIMUM RATINGS
Supply Voltage, VCCx
Inputs, VI
4.6V
-0.5V to VCC + 0.5V
-0.5V to VCC + 0.5V
Outputs, VO
Package Thermal Impedance, θJA
Storage Temperature, TSTG
37.8°C/W (0 lfpm)
-65°C to 150°C
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 beyond those listed in
the DC Characteristics or AC Characteristics is not implied. Exposure to absolute maximum rating conditions for extended
periods may affect product reliability.
TABLE 4A. DC POWER SUPPLY CHARACTERISTICS, VCC = VCCA = 3.3V±5%, TA = 0°C TO 70°C
Symbol
VCC
Parameter
Test Conditions
Minimum Typical Maximum Units
Positive Supply Voltage
Analog Supply Voltage
Power Supply Current
Analog Supply Current
3.135
3.135
3.3
3.3
115
15
3.465
3.465
V
VCCA
IEE
V
mA
mA
ICCA
TABLE 4B. LVCMOS / LVTTL DC CHARACTERISTICS, VCC = VCCA = 3.3V±5%, TA = 0°C TO 70°C
Symbol Parameter Test Conditions Minimum Typical Maximum Units
VIH
VIL
Input High Voltage
2
VCC + 0.3
0.8
V
V
Input Low Voltage
-0.3
M0-M8, N0, N1,
OE, nP_LOAD,
XTAL_SEL
S_LOAD,
FREF_REF,
S_DATA, S_CLOCK
M0-M8, N0, N1,
OE, nP_LOAD,
XTAL_SEL
S_LOAD,
FREF_REF,
V
CC = VIN = 3.465V
5
µA
µA
µA
µA
IIH
Input High Current
VCC = VIN = 3.465V
150
VCC = 3.465V, VIN = 0V
VCC = 3.465V, VIN = 0V
-150
IIL
Input Low Current
-5
S_DATA, S_CLOCK
VOH
VOL
Output High Voltage; NOTE 1
Output Low Voltage; NOTE 1
2.6
V
V
0.5
NOTE 1: Outputs terminated with 50Ω to VCC/2.
TABLE 4C. LVPECL DC CHARACTERISTICS, VCC = VCCA = 3.3V±5%, TA = 0°C TO 70°C
Symbol
VOH
Parameter
Test Conditions
Minimum
VCC - 1.4
VCC - 2.0
0.6
Typical Maximum Units
Output High Voltage; NOTE 1
Output Low Voltage; NOTE 1
Peak-to-Peak Output Voltage Swing
VCC - 1.0
VCC - 1.7
1.0
V
V
V
VOL
VSWING
NOTE 1: Outputs terminated with 50Ω to VCC - 2V.
84330AV
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REV. B AUGUST 30, 2002
5
PRELIMINARY
ICS84330
Integrated
Circuit
Systems, Incꢀ
700MHZ, LOW JITTER, CRYSTAL-TO-3.3V
DIFFERENTIAL LVPECL FREQUENCY SYNTHESIZER
TABLE 5. CRYSTAL CHARACTERISTICS
Parameter
Test Conditions
Minimum Typical Maximum
Units
Mode of Oscillation
Frequency
Fundamental
10
25
70
7
MHz
Ω
Equivalent Series Resistance (ESR)
Shunt Capacitance
pF
TABLE 6. INPUT FREQUENCY CHARACTERISTICS, VCC = VCCA = 3.3V±5%, TA = 0°C TO 70°C
Symbol Parameter
fIN Input Frequency
Test Conditions
Minimum
Typical
Maximum
Units
MHz
MHz
XTAL; NOTE 1
S_CLOCK
10
25
50
NOTE 1: For the crystal frequency range the M value must be set to achieve the minimum or maximum VCO frequency
range of 200MHz or 700MHz. Using the minimum frequency of 10MHz, valid values of M are 160 ≤ M ≤ 511.
Using the maximum frequency of 25MHz, valid values of M are 64 ≤ M ≤ 224.
TABLE 7. AC CHARACTERISTICS, VCC = VCCA = 3.3V±5%, TA = 0°C TO 70°C
Symbol Parameter
Test Conditions
Minimum Typical Maximum Units
FOUT
tjit(per)
tjit(cc)
tR
Output Frequency
700
MHz
ps
ps
ps
ps
ns
ns
ns
ns
ns
ms
%
Period Jitter, RMS; NOTE 1, 2
Cycle-to-Cycle Jitter; NOTE 1, 2
Output Rise Time
TBD
35
20% to 80%
20% to 80%
500
500
tF
Output Fall Time
S_DATA to S_CLOCK
20
20
20
20
20
tS
Setup Time
S_CLOCK to S_LOAD
M, N to nP_LOAD
S_DATA to S_CLOCK
M, N to nP_LOAD
tH
Hold Time
tL
PLL Lock Time
10
odc
Output Duty Cycle
50
See Parameter Measurement Information section.
Characterized using a 16MHz XTAL.
NOTE 1: This parameter is defined in accordance with JEDEC Standard 65
NOTE 2: See Applications section.
84330AV
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REV. B AUGUST 30, 2002
6
PRELIMINARY
ICS84330
Integrated
Circuit
Systems, Incꢀ
700MHZ, LOW JITTER, CRYSTAL-TO-3.3V
DIFFERENTIAL LVPECL FREQUENCY SYNTHESIZER
PARAMETER MEASUREMENT INFORMATION
VCC, VCCA
SCOPE
Qx
LVPECL
VCC, VCCA = 2V
nQx
VEE = -1.3V ± 0.165V
3.3V OUTPUT LOAD TEST CIRCUIT
VOH
V
ref
VOL
1σ contains 68.26% of all measurements
2σ contains 95.4% of all measurements
3σ contains 99.73% of all measurements
4σ contains 99.99366% of all measurements
6σ contains (100-1.973x10-7)% of all measurements
Histogram
Reference Point
(Trigger Edge)
Mean Period
(First edge after trigger)
Period Jitter
84330AV
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REV. B AUGUST 30, 2002
7
PRELIMINARY
ICS84330
Integrated
Circuit
Systems, Incꢀ
700MHZ, LOW JITTER, CRYSTAL-TO-3.3V
DIFFERENTIAL LVPECL FREQUENCY SYNTHESIZER
nFOUT
FOUT
➤
➤
tcycle n+1
tcycle n
➤
➤
tjit(cc) = tcycle n –tcycle n+1
1000 Cycles
CYCLE-TO-CYLE JITTER
80%
80%
VSWING
20%
20%
Clock Outputs
tR
OUTPUT RISE AND FALL TIME
tF
nFOUT
FOUT
Pulse Width
tPERIOD
tPW
odc =
tPERIOD
odc & tPERIOD
84330AV
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REV. B AUGUST 30, 2002
8
PRELIMINARY
ICS84330
Integrated
Circuit
Systems, Incꢀ
700MHZ, LOW JITTER, CRYSTAL-TO-3.3V
DIFFERENTIAL LVPECL FREQUENCY SYNTHESIZER
APPLICATIONS INFORMATION
POWER SUPPLY FILTERING TECHNIQUES
As in any high speed analog circuitry, the power supply pins
are vulnerable to random noise. The ICS84330 provides
separate power supplies to isolate any high switching
noise from the outputs to the internal PLL. VCC and VCCA
should be individually connected to the power supply
plane through vias, and bypass capacitors should be
used for each pin. To achieve optimum jitter performance,
power supply isolation is required. Figure 2 illustrates how
a 10Ω resistor along with a 10µF and a .01µF bypass
capacitor should be connected to each VCCA pin.
3.3V
VCC
.01µF
.01µF
10Ω
VCCA
10 µF
FIGURE 2 - POWER SUPPLY FILTERING
TERMINATION FOR LVPECL OUTPUTS
drive 50Ω transmission lines. Matched impedance techniques
should be used to maximize operating frequency and minimize
signal distortion. Figures 3A and 3B show two different layouts
which are recommended only as guidelines. Other suitable clock
layouts may exist and it would be recommended that the board
designers simulate to guarantee compatibility across all printed
circuit and clock component process variations.
The clock layout topology shown below is a typical termina-
tion for LVPECL outputs. The two different layouts mentioned
are recommended only as guidelines.
FOUT and nFOUT are low impedance follower outputs that
generate ECL/LVPECL compatible outputs. Therefore, terminat-
ing resistors (DC current path to ground) or current sources
must be used for functionality. These outputs are designed to
3.3V
Zo = 50Ω
5
2
5
Zo
Zo
2
FIN
FOUT
Zo = 50Ω
Zo = 50Ω
FOUT
FIN
50Ω
50Ω
➤
VCC - 2V
Zo = 50Ω
RTT
1
3
2
3
2
Zo
RTT =
Zo
Zo
(VOH + VOL / VCC –2) –2
FIGURE 3A - LVPECL OUTPUT TERMINATION
FIGURE 3B - LVPECL OUTPUT TERMINATION
84330AV
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9
PRELIMINARY
ICS84330
Integrated
Circuit
Systems, Incꢀ
700MHZ, LOW JITTER, CRYSTAL-TO-3.3V
DIFFERENTIAL LVPECL FREQUENCY SYNTHESIZER
14
12
10
8
6
4
2
0
25 50 75 100 125 150 175 200 225 250 275 300 325 350 375 400 425 450 475 500 525
Output Frequency (MHz)
FIGURE 4A - RMS JITTER VS. fOUT (using a 16MHz XTAL)
60
50
40
30
20
10
0
25 50 75 100 125 150 175 200 225 250 275 300 325 350 375 400 425 450 475 500 525
Output Frequency (MHz)
FIGURE 4B - CYCLE-TO-CYCLE JITTER VS. fOUT (using a 16MHz XTAL)
84330AV
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REV. B AUGUST 30, 2002
10
PRELIMINARY
ICS84330
Integrated
Circuit
Systems, Incꢀ
700MHZ, LOW JITTER, CRYSTAL-TO-3.3V
DIFFERENTIAL LVPECL FREQUENCY SYNTHESIZER
POWER CONSIDERATIONS
This section provides information on power dissipation and junction temperature for the ICS84330.
Equations and example calculations are also provided.
1. Power Dissipation.
The total power dissipation for the ICS84330 is the sum of the core power plus the power dissipated in the load(s).
The following is the power dissipation for VCC = 3.3V + 5% = 3.465V, which gives worst case results.
NOTE: Please refer to Section 3 for details on calculating power dissipated in the load.
•
•
Power (core)MAX = VCC_MAX * IEE_MAX = 3.465V * 115mA = 398.5
Power (outputs)MAX = 30.2mW/Loaded Output pair
If all outputs are loaded, the total power is 1 * 30.2mW = 30.2mW
Total Power_MAX (3.465V, with all outputs switching) = 398.5 + 30.2mW = 428.7mW
2. Junction Temperature.
Junction temperature, Tj, is the temperature at the junction of the bond wire and bond pad and directly affects the reliability of the
device. The maximum recommended junction temperature for HiPerClockSTM devices is 125°C.
The equation for Tj is as follows: Tj = θJA * Pd_total + TA
Tj = Junction Temperature
θJA = Junction-to-Ambient Thermal Resistance
Pd_total = Total Device Power Dissipation (example calculation is in section 1 above)
TA =Ambient Temperature
In order to calculate junction temperature, the appropriate junction-to-ambient thermal resistance θJA must be used. Assuming a
moderate air flow of 200 linear feet per minute and a multi-layer board, the appropriate value is 31.1°C/W per Table 8Abelow.
Therefore, Tj for an ambient temperature of 70°C with all outputs switching is:
70°C + 0.429W * 31.1°C/W = 83.3°C. This is well below the limit of 125°C
This calculation is only an example. Tj will obviously vary depending on the number of loaded outputs, supply voltage, air flow,
and the type of board (single layer or multi-layer).
TABLE 8A. THERMAL RESISTANCE qJA FOR 28-PIN PLCC, FORCED CONVECTION
qJA by Velocity (Linear Feet per Minute)
0
200
500
Multi-Layer PCB, JEDEC Standard Test Boards
37.8°C/W
31.1°C/W
28.3°C/W
NOTE: Most modern PCB designs use multi-layered boards. The data in the second row pertains to most designs.
TABLE 8B. THERMAL RESISTANCE qJA FOR 32-PIN LQFP, FORCED CONVECTION
qJA by Velocity (Linear Feet per Minute)
0
200
500
Single-Layer PCB, JEDEC Standard Test Boards
Multi-Layer PCB, JEDEC Standard Test Boards
67.8°C/W
55.9°C/W
50.1°C/W
47.9°C/W
42.1°C/W
39.4°C/W
NOTE: Most modern PCB designs use multi-layered boards. The data in the second row pertains to most designs.
84330AV
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REV. B AUGUST 30, 2002
11
PRELIMINARY
ICS84330
Integrated
Circuit
Systems, Incꢀ
700MHZ, LOW JITTER, CRYSTAL-TO-3.3V
DIFFERENTIAL LVPECL FREQUENCY SYNTHESIZER
3. Calculations and Equations.
The purpose of this section is to derive the power dissipated into the load.
LVPECL output driver circuit and termination are shown in the Figure 5.
VCC
Q1
VOUT
RL
50
VCC - 2V
FIGURE 5 - LVPECL DRIVER CIRCUIT AND TERMINATION
To calculate worst case power dissipation into the load, use the following equations which assume a 50Ω load, and a termination
voltage of V - 2V.
CC
•
•
For logic high, V = V
= V
– 1.0V
OUT
OH_MAX
CC_MAX
)
= 1.0V
OH_MAX
(V
- V
CC_MAX
For logic low, V = V
= V
– 1.7V
OUT
OL_MAX
CC_MAX
)
= 1.7V
OL_MAX
(V
- V
CC_MAX
Pd_H is power dissipation when the output drives high.
Pd_L is the power dissipation when the output drives low.
))
/R ] * (V
Pd_H = [(V
– (V
- 2V))/R ] * (V
- V
) = [(2V - (V
- V
- V
) =
OH_MAX
CC_MAX
CC_MAX
OH_MAX
_MAX
OH_MAX
CC_MAX
OH_MAX
L
CC
L
[(2V - 1V)/50Ω] * 1V = 20.0mW
Pd_L = [(V – (V - 2V))/R ] * (V
))
/R ] * (V
- V
) = [(2V - (V
- V
- V
) =
OL_MAX
CC_MAX
CC_MAX
OL_MAX
_MAX
CC
OL_MAX
CC_MAX
OL_MAX
L
L
[(2V - 1.7V)/50Ω] * 1.7V = 10.2mW
Total Power Dissipation per output pair = Pd_H + Pd_L = 30.2mW
84330AV
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REV. B AUGUST 30, 2002
12
PRELIMINARY
ICS84330
Integrated
Circuit
Systems, Incꢀ
700MHZ, LOW JITTER, CRYSTAL-TO-3.3V
DIFFERENTIAL LVPECL FREQUENCY SYNTHESIZER
RELIABILITY INFORMATION
TABLE 9A. θJAVS. AIR FLOW PLCC TABLE
qJA by Velocity (Linear Feet per Minute)
0
200
500
Multi-Layer PCB, JEDEC Standard Test Boards
37.8°C/W
31.1°C/W
28.3°C/W
NOTE: Most modern PCB designs use multi-layered boards. The data in the second row pertains to most designs.
TABLE 9B. θJAVS. AIR FLOW LQFP TABLE
qJA by Velocity (Linear Feet per Minute)
0
200
500
Single-Layer PCB, JEDEC Standard Test Boards
Multi-Layer PCB, JEDEC Standard Test Boards
67.8°C/W
47.9°C/W
55.9°C/W
42.1°C/W
50.1°C/W
39.4°C/W
NOTE: Most modern PCB designs use multi-layered boards. The data in the second row pertains to most designs.
TRANSISTOR COUNT
The transistor count for ICS84330 is: 4442
84330AV
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REV. B AUGUST 30, 2002
13
PRELIMINARY
ICS84330
Integrated
Circuit
Systems, Incꢀ
700MHZ, LOW JITTER, CRYSTAL-TO-3.3V
DIFFERENTIAL LVPECL FREQUENCY SYNTHESIZER
PACKAGE OUTLINE - V SUFFIX
TABLE 10A. PACKAGE DIMENSIONS
JEDEC VARIATION
ALL DIMENSIONS IN MILLIMETERS
SYMBOL
MINIMUM
MAXIMUM
N
A
28
4.19
2.29
4.57
3.05
A1
A2
b
1.57
2.11
0.33
0.53
c
0.19
0.32
D
12.32
11.43
4.85
12.57
11.58
5.56
D1
D2
E
12.32
11.43
4.85
12.57
11.58
5.56
E1
E2
Reference Document: JEDEC Publication 95, MS-018
84330AV
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REV. B AUGUST 30, 2002
14
PRELIMINARY
ICS84330
Integrated
Circuit
Systems, Incꢀ
700MHZ, LOW JITTER, CRYSTAL-TO-3.3V
DIFFERENTIAL LVPECL FREQUENCY SYNTHESIZER
PACKAGE OUTLINE - Y SUFFIX
TABLE 10B. PACKAGE DIMENSIONS
JEDEC VARIATION
ALL DIMENSIONS IN MILLIMETERS
BBA
SYMBOL
MINIMUM
NOMINAL
MAXIMUM
N
A
32
--
--
--
1.60
0.15
1.45
0.45
0.20
A1
A2
b
0.05
1.35
0.30
0.09
1.40
0.37
c
--
D
9.00 BASIC
7.00 BASIC
5.60 Ref.
9.00 BASIC
7.00 BASIC
5.60 Ref.
0.80 BASIC
0.60
D1
D2
E
E1
E2
e
L
0.45
0.75
q
--
0
°
7°
ccc
--
--
0.10
Reference Document: JEDEC Publication 95, MS-026
84330AV
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REV. B AUGUST 30, 2002
15
PRELIMINARY
ICS84330
Integrated
Circuit
Systems, Incꢀ
700MHZ, LOW JITTER, CRYSTAL-TO-3.3V
DIFFERENTIAL LVPECL FREQUENCY SYNTHESIZER
TABLE 11. ORDERING INFORMATION
Part/Order Number
ICS84330AV
Marking
Package
Count
38 per Tube
500
Temperature
0°C to 70°C
0°C to 70°C
0°C to 70°C
0°C to 70°C
ICS84330AV
ICS84330AV
ICS84330AY
ICS84330AY
28 Lead PLCC
ICS84330AVT
ICS84330AY
28 Lead PLCC on Tape and Reel
32 Lead LQFP
250 per Tray
1000
ICS84330AYT
32 Lead LQFP on Tape and Reel
While the information presented herein has been checked for both accuracy and reliability, Integrated Circuit Systems, Incorporated (ICS) assumes no responsibility for either its use
or for infringement of any patents or other rights of third parties, which would result from its use. No other circuits, patents, or licenses are implied. This product is intended for use
in normal commercial applications. Any other applications such as those requiring extended temperature range, high reliability, or other extraordinary environmental requirements are
not recommended without additional processing by ICS. ICS reserves the right to change any circuitry or specifications without notice. ICS does not authorize or warrant any ICS
product for use in life support devices or critical medical instruments.
84330AV
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REV. B AUGUST 30, 2002
16
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