ICST ICS840002-32 Femtoclocksâ ¢ crystal-to lvcmos/lvttl frequency synthesizer Datasheet

PRELIMINARY
Integrated
Circuit
Systems, Inc.
ICS840002-32
FEMTOCLOCKS™CRYSTAL-TOLVCMOS/LVTTL FREQUENCY SYNTHESIZER
GENERAL DESCRIPTION
FEATURES
The ICS840002-32 is a 2 output LVCMOS/
LVTTL Synthesizer optimized to generate
HiPerClockS™ Fibre Channel or Serial ATA reference clock
frequencies and is a member of the
HiPerClocks TM family of high perfor mance
clock solutions from ICS. Using an 18pF parallel resonant
crystal, the following frequencies can be generated based
on 1 frequency select pin (SEL): 106.25MHz and 75MHz,
or 212.5MHz. The ICS840002-32 uses ICS’ 3 rd generation
low phase noise VCO technology and can achieve 1ps or
lower typical rms phase jitter, easily meeting Fibre Channel
and Serial ATA jitter requirements. The ICS840002-32 is
packaged in a small 8-pin TSSOP package.
• Two LVCMOS/LVTTL outputs, 15Ω typical output impedance
ICS
• Crystal oscillator interface
• Output frequency range: 75MHz and 106.25MHz,
or 212.5MHz
• RMS phase jitter at 106.25MHZ (637kHz - 5MHz):
0.86ps (typical)
• Full 3.3V or 3.3V core/2.5V output supply mode
• 0°C to 70°C ambient operating temperature
SELECT FUNCTION TABLE
Input
Output Frequency Range (MHz)
SEL
Q0
Q1
0
75
106.25
1
75
212.5
BLOCK DIAGRAM
PIN ASSIGNMENT
26.5625MHz
Q0
XTAL_IN
VDD
XTAL_OUT
XTAL_IN
GND
FemtoClock™
Q1
XTAL_OUT
1
2
3
4
8
7
6
5
SEL
Q0
VDDO
Q1
ICS840002-32
8-Lead TSSOP
4.40mm x 3.0mm x 0.925mm
package body
G Package
Top View
SEL
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.
840002BG-32
www.icst.com/products/hiperclocks.html
1
REV. A JUNE 27, 2005
PRELIMINARY
Integrated
Circuit
Systems, Inc.
ICS840002-32
FEMTOCLOCKS™CRYSTAL-TOLVCMOS/LVTTL FREQUENCY SYNTHESIZER
TABLE 1. PIN DESCRIPTIONS
Number
Name
Type
Description
1
2,
3
4
VDD
XTAL_OUT,
XTAL_IN
GND
Power
Core supply pin.
Input
Cr ystal oscillator interface.
Power
5, 7
Q1, Q0
Output
1
VDDO
Power
Power supply ground.
Single-ended clock outputs. LVCMOS/LVTTL interface levels.
15Ω typical output impedence.
Output supply pin.
8
SEL
Input
Pulldown Select pin. LVCMOS/LVTTL interface levels.
NOTE: Pulldown refers to internal input resistors. See Table 2, Pin Characteristics, for typical values.
TABLE 2. PIN CHARACTERISTICS
Symbol
Parameter
CIN
Input Capacitance
Test Conditions
Minimum
Typical
Maximum
Units
4
pF
VDD, VDDO = 3.465V
TBD
pF
VDD = 3.465V, VDDO = 2.625V
TBD
pF
CPD
Power Dissipation Capacitance
RPULLDOWN
Input Pulldown Resistor
51
kΩ
ROUT
Output Impedance
15
Ω
840002BG-32
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REV. A JUNE 27, 2005
PRELIMINARY
Integrated
Circuit
Systems, Inc.
ICS840002-32
FEMTOCLOCKS™CRYSTAL-TOLVCMOS/LVTTL FREQUENCY SYNTHESIZER
ABSOLUTE MAXIMUM RATINGS
Supply Voltage, VDD
4.6V
Inputs, VI
-0.5V to VDD + 0.5 V
Outputs, VO
-0.5V to VDDO + 0.5V
Package Thermal Impedance, θJA
101.7°C/W (0 mps)
Storage Temperature, TSTG
-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 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 3A. POWER SUPPLY DC CHARACTERISTICS, VDD = VDDO = 3.3V±5%, TA = 0°C TO 70°C
Symbol
VDD
Parameter
Core Supply Voltage
Test Conditions
VDDO
Output Supply Voltage
IDD
IDDO
Power Supply Current
Output Supply Current
Minimum
3.135
Typical
3.3
Maximum
3.465
Units
V
3.135
3.3
3.465
V
TBD
TBD
mA
mA
TABLE 3B. POWER SUPPLY DC CHARACTERISTICS, VDD = 3.3V±5%, VDDO = 2.5V±5%, TA = 0°C TO 70°C
Symbol
VDD
Parameter
Core Supply Voltage
Test Conditions
VDDO
Output Supply Voltage
IDD
IDDO
Power Supply Current
Output Supply Current
Minimum
3.135
Typical
3.3
Maximum
3.465
Units
V
2.375
2.5
2.625
V
TBD
TBD
mA
mA
TABLE 3C. LVCMOS/LVTTL DC CHARACTERISTICS, VDD = 3.3V±5%, VDDO = 3.3V±5% OR 2.5V±5%, TA = 0°C TO 70°C
Symbol Parameter
Test Conditions
VIH
Input High Voltage
SEL
Minimum Typical
Maximum
Units
2
VDD + 0.3
V
-0.3
0.8
V
5
µA
VIL
Input Low Voltage
SEL
IIH
Input High Current
SEL
VDD = VIN = 3.465V
IIL
Input Low Current
SEL
VDD = 3.465V, VIN = 0V
-150
µA
VDDO = 3.3V ± 5%
2.6
V
VDDO = 2.5V ± 5%
1.8
V
VOH
Output High Voltage; NOTE 1
VOL
Output Low Voltage; NOTE 1
VDDO = 3.3V or 2.5V ± 5%
0.5
V
NOTE 1: Outputs terminated with 50Ω to VDDO/2. See Parameter Measurement Information, Output Load Test Circuit.
TABLE 4. CRYSTAL CHARACTERISTICS
Parameter
Test Conditions
Mode of Oscillation
Minimum
Typical
Maximum
Units
Fundamental
Frequency
26.5625
MHz
Equivalent Series Resistance (ESR)
50
Ω
Shunt Capacitance
7
pF
Drive Level
1
mW
NOTE: Characterized using an 18pF parallel resonant crystal.
840002BG-32
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REV. A JUNE 27, 2005
PRELIMINARY
Integrated
Circuit
Systems, Inc.
ICS840002-32
FEMTOCLOCKS™CRYSTAL-TOLVCMOS/LVTTL FREQUENCY SYNTHESIZER
TABLE 5A. AC CHARACTERISTICS, VDD = VDDO = 3.3V±5%, TA = 0°C TO 70°C
Symbol
Parameter
Test Conditions
Minimum
Typical
Maximum
212.5
fOUT
Output Frequency Range
Units
MHz
106.25
75
tsk(o)
tjit(Ø)
t R / tF
Output Skew; NOTE 1, 3
RMS Phase Jitter (Random);
NOTE 2
Output Rise/Fall Time
212.5MHz @ Integration Range:
2.55MHz - 20MHz
106.25MHz @ Integration Range:
637kHz - 5MHz
75MHz @ Integration Range:
12kHz - 20MHz
20% to 80%
TBD
ps
0.50
ps
0.86
ps
TBD
ps
400
ps
odc
Output Duty Cycle
50
NOTE 1: Defined as skew between outputs at the same supply voltages and with equal load conditions.
Measured at VDDO/2.
NOTE 2: Please refer to the Phase Noise Plot.
NOTE 3: This parameter is defined in accordance with JEDEC Standard 65.
%
TABLE 5B. AC CHARACTERISTICS, VDD = 3.3V±5%, VDDO = 2.5V±5%, TA = 0°C TO 70°C
Symbol
Parameter
Test Conditions
Minimum
Typical
fOUT
Output Frequency Range
106.25
tsk(o)
Output Skew; NOTE 1, 3
TBD
ps
0.57
ps
1.1
ps
TBD
ps
450
ps
212.5
Maximum
Units
MHz
75
tjit(Ø)
tR / tF
RMS Phase Jitter (Random);
NOTE 2
Output Rise/Fall Time
212.5MHz @ Integration Range:
2.55MHz - 20MHz
106.25MHz @ Integration Range:
637kHz - 5MHz
75MHz @ Integration Range:
12kHz - 20MHz
20% to 80%
odc
Output Duty Cycle
50
NOTE 1: Defined as skew between outputs at the same supply voltages and with equal load conditions.
Measured at VDDO/2.
NOTE 2: Please refer to the Phase Noise Plot.
NOTE 3: This parameter is defined in accordance with JEDEC Standard 65.
840002BG-32
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%
REV. A JUNE 27, 2005
PRELIMINARY
Integrated
Circuit
Systems, Inc.
ICS840002-32
FEMTOCLOCKS™CRYSTAL-TOLVCMOS/LVTTL FREQUENCY SYNTHESIZER
PARAMETER MEASUREMENT INFORMATION
1.65V±5%
2.05V±5% 1.25V±5%
SCOPE
VDD,
VDDO
VDDO
Qx
LVCMOS
SCOPE
V DD
Qx
LVCMOS
GND
GND
-1.65V±5%
-1.25V±5%
3.3V CORE/3.3V OUTPUT LOAD AC TEST CIRCUIT
3.3V CORE/2.5V OUTPUT LOAD AC TEST CIRCUIT
Phase Noise Plot
Noise Power
V
DDO
Qx
2
Phase Noise Mask
V
DDO
Qy
Offset Frequency
f1
2
tsk(o)
f2
RMS Jitter = Area Under the Masked Phase Noise Plot
RMS PHASE JITTER
OUTPUT SKEW
V
80%
DDO
80%
2
Q0, Q1
Clock
Outputs
t PW
20%
20%
tR
t
tF
odc =
PERIOD
t PW
x 100%
t PERIOD
OUTPUT RISE/FALL TIME
840002BG-32
OUTPUT DUTY CYCLE/PULSE WIDTH/PERIOD
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REV. A JUNE 27, 2005
PRELIMINARY
Integrated
Circuit
Systems, Inc.
ICS840002-32
FEMTOCLOCKS™CRYSTAL-TOLVCMOS/LVTTL FREQUENCY SYNTHESIZER
APPLICATION INFORMATION
CRYSTAL INPUT INTERFACE
below were determined using an 18pF parallel resonant crystal and were chosen to minimize the ppm error.
The ICS840002-32 has been characterized with 18pF parallel resonant crystals. The capacitor values shown in Figure 1
XTAL_OUT
C1
33p
X1
18pF Parallel Crystal
XTAL_IN
C2
27p
ICS840002-32
Figure 1. CRYSTAL INPUt INTERFACE
RELIABILITY INFORMATION
TABLE 6. θJAVS. AIR FLOW TABLE
FOR
8 LEAD TSSOP
θJA by Velocity (Meters Per Second)
Multi-Layer PCB, JEDEC Standard Test Boards
0
1
2.5
101.7°C/W
90.5°C/W
89.8°C/W
TRANSISTOR COUNT
The transistor count for ICS840002-32 is: 2322
840002BG-32
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REV. A JUNE 27, 2005
PRELIMINARY
Integrated
Circuit
Systems, Inc.
PACKAGE OUTLINE - G SUFFIX
ICS840002-32
FEMTOCLOCKS™CRYSTAL-TOLVCMOS/LVTTL FREQUENCY SYNTHESIZER
FOR
8 LEAD TSSOP
TABLE 7. PACKAGE DIMENSIONS
Millimeters
SYMBOL
Minimum
N
Maximum
8
A
--
1.20
A1
0.05
0.15
A2
0.80
1.05
b
0.19
0.30
c
0.09
0.20
D
2.90
E
3.10
6.40 BASIC
E1
4.30
e
4.50
0.65 BASIC
L
0.45
0.75
α
0°
8°
aaa
--
0.10
Reference Document: JEDEC Publication 95, MO-153
840002BG-32
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7
REV. A JUNE 27, 2005
PRELIMINARY
Integrated
Circuit
Systems, Inc.
ICS840002-32
FEMTOCLOCKS™CRYSTAL-TOLVCMOS/LVTTL FREQUENCY SYNTHESIZER
TABLE 8. ORDERING INFORMATION
Part/Order Number
Marking
Package
Shipping Packaging
Temperature
ICS840002BG-32
02B32
8 lead TSSOP
tube
0°C to 70°C
ICS840002BG-32T
02B32
8 lead TSSOP
2500 tape & reel
0°C to 70°C
The aforementioned trademarks, HiPerClockS and FEMTOCLOCKS are trademarks of Integrated Circuit Systems, Inc. or its subsidiaries in the United States and/or other countries.
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.
840002BG-32
www.icst.com/products/hiperclocks.html
8
REV. A JUNE 27, 2005
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