ICS8MG3-311.040AJI [IDT]
Oscillator;
| 型号： | ICS8MG3-311.040AJI |
| 厂家： | 
INTEGRATED DEVICE TECHNOLOGY |
| 描述： | Oscillator |
| 文件： | 总4页 (文件大小：245K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
PRELIMINARY
Integrated
Circuit
Systems, Inc.
ICS8Mx3
Crystal Oscillator: LVPECL CLOCK OUTPUT
I C S 8 M x 3
LOW JITTER, HIGH FREQUENCY XTAL OSCILLATOR
• Stable, ultra low jitter, LVPECL clock generation
• For Gigabit Ethernet, Fibre Channel, PCI-Express, other applications
• Clock output frequencies from 75 to 750 MHz
• One differential LVPECL clock output
• Output Enable (OE) pin (tri-state – with ultra low current – when low)
• Small 6-pin 5 x 7 x 1.5mm SMT ceramic package
• Low profile package allows back-side PCB mounting
• Pb-free RoHS compliant (by default; no additional code required)
• 2.5V or 3.3V device power supply options
8Mx3
( T o p V ie w )
• Commercial (0 to +70 OC) and Industrial (-40 to +85 OC) temperatures
• Frequency stability of 50 or 100 ppm
(including initial accuracy, operating temperature variation,
supply voltage variation, load variation, reflow drift, and aging for 10 years)
6-pin CERHERMETIC 5 x 7 x 1.5mm SMT
• Low phase jitter < 1 ps rms maximum (12kHz to 20MHz)
ELECTRICAL SPECIFICATIONS
Unless stated otherwise, VCC = 2.5 Volts + 5% or 3.3 Volts + 5%, TA = 0 oC to +70 oC (commercial), TA = -40 oC to +85 oC (industrial)
Parameter
Min
Typ
Max
Unit
Conditions
DC CHARACTERISTICS
Power Supply Voltage
VCC
3.135
2.375
3.3
2.5
75
3.465
2.625
V
3.3V operation
2.5V operation
Power Supply
(VCC , VEE pins)
V
in 8MJ3 and 8MK3 only
Power Supply Current
IEE
mA
mA
pF
V
OE = VCC
OE = GND
Current with Output Disable IOED
<0.6
Input Capacitance
Input High Voltage
CIN
VIH
4
0.7 x VCC
-150
Output Enable
(OE pin)
LVCMOS/LVTTL
V
Input Low Voltage
VIL
0.3 x VCC
Input High Current
Input Low Current
IIH
5
µA
µA
kΩ
VCC = VIN = 2.625 or 3.465V
IIL
VCC = 2.625 or 3.465V, VIN = 0V
Internal Pull-up Resistor
RPULLUP
51
Output High Voltage1
Output Low Voltage1
Outputs terminated with 50Ω to VCC - 2V.
VOH
VOL
VCC - 1.4
VCC - 2.0
VCC - 0.9
VCC - 1.7
V
Clock Output
Level
(OUT, nOUT)
LVPECL
See PARAMETER MEASUREMENT INFORMATION, Output
Load AC Test Circuit diagrams.
V
Peak-to-Peak Output Voltage
Swing
See PARAMETER MEASUREMENT INFORMATION,
Output Rise and Fall Time diagram.
VSWING
0.6
75
1.0
V
AC CHARACTERISTICS
Output Frequency Range
750
±100
±50
MHz
All conditions
Output
(OUT, nOUT)
Frequency Stability error
∆f/fO
Includes frequency set,
ppm p-p
in 8MH3 and 8MK3
VCC, TA & load variation,
ppm p-p
%
in 8MG3 and 8MJ3
reflow drift, 10 yr. aging
Output Duty Cycle
Output Rise Time
Output Fall Time
odc
tR
50
See Output Duty Cycle diagram
and Rise and Fall Time diagram
in PARAMETER MEASUREMENT
INFORMATION.
600
600
10
ps
20% to 80% of VOH - VOL
20% to 80% of VOH - VOL
tF
ps
tOSC
ms
Time at Min. VCC (3.135V or 2.375V) to be 0s
(design target
Oscillator Start-up Time
RMS Phase Jitter, (Random) 2
< 1
design target
ps rms
)
t jit(Ø)
2
0.2
3
ps
ps
ps
ps
ps
Deterministic
tDS
Jitter
3
Random
σ
σ
of Random jitter
tRS
3
3
Root Mean Square
Peak to Peak
Accumulated Jitter
of Total jitter distribution
tRMS
3
25
4
tP-P
3
n = 2 to 50,000 cycles
tacc
Note 1: Outputs terminated with 50Ω to V - 2V. See PARAMETER MEASUREMENT INFORMATION, Output Load AC Test Circuit diagrams.
CC
Note 2: Measured using an Aeroflex PN9500 with a 12 kHz to 20MHz integration range.
Note 3: Measured using a Wavecrest SIA-3000.
SUPPLY VOLTAGE & FREQUENCY ACCURACY
G
H
J
=
=
=
=
3.3V
±50 ppm
± 100 ppm
± 50 ppm
± 100 ppm
3.3V
2.5V / 3.3V
2.5V / 3.3V
K
ICS8Mx3 Datasheet Rev A
Revised 30Nov2004
Integrated Circuit Systems, Inc. ● Networking & Communications ● www.icst.com ● tel (508) 852-5400
ICS8M 3
X
Integrated
Circuit
Systems, Inc.
Crystal Oscillator: LVPECL CLOCK
O
UTPUT
PRELIMINARY
PIN DESCRIPTIONS
Output enable pin. Tri-state – with
ABSOLUTE MAXIMUM RATINGS
Inputs
VI
V
V
-0.5 to VCC +0.5
1
OE
Input
Internal pull-up resistor
ultra low current – when low.
LVCMOS/LVTTL interface levels.
Outputs
VO
VCC
-0.5 to VCC +0.5
2
3
NC
VEE
Unused
Power
No connect.
4.6
Positive Supply Voltage
Package Thermal Impedence
Storage Temperature
V
Negative supply pin.
TBD
°C/W (0 lfpm)
4
5
OUT
nOUT
Differential clock output connections.
LVPECL interface levels.
Output No internal terminator
Power
-40 to +100
oC
TS
VCC
6
Power supply pin.
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 DC Characteristics, or
AC Characteristics is not implied. Exposure to absolute maximum rating conditions for
For typical value of internal pull-up resistor, see DC Characteristics.
extended periods may affect product reliability
.
PARAMETER MEASUREMENT INFORMATION
2V
2V
SCOPE
SCOPE
VCC
VCC
Qx
Qx
LVPECL
VEE
LVPECL
nQx
nQx
VEE
-0.5V 0.125V
-1.3V 0.165V
2.5V Output Load AC Test Circuit
3.3V Output Load AC Test Circuit
nOUT
OUT
Phase Noise Plot
tPW
(Output Pulse Width)
t
PW
odc =
t
PERIOD
tPERIOD
Output Duty Cycle / Pulse WIdth / Period
80%
80%
VSWING
Offset Frequency
f1
f2
20%
20%
Clock
Outputs
t
t
F
R
RMS Jitter = Area Under Offset Frequency Markers
RMS Phase Jitter
Output Rise and Fall Time
ICS8Mx3 Datasheet Rev A
2 of 4
Revised 30Nov2004
Integrated Circuit Systems, Inc. ● Networking & Communications ● www.icst.com ● tel (508) 852-5400
ICS8M 3
X
Integrated
Circuit
Systems, Inc.
Crystal Oscillator: LVPECL CLOCK
O
UTPUT
PRELIMINARY
APPLICATION INFORMATION
TERMINATION FOR 3.3V LVPECL OUTPUT
TERMINATION FOR 2.5V LVPECL OUTPUT
The clock layout topology shown below is a typical termination for 3.3V LVPECL
outputs. The two different layouts mentioned are recommended only as guide-
lines.
Figure 2A and Figure 2B show examples of termination for 2.5V LVPECL driver.
These terminations are equivalent to terminating 50Ωto V - 2V.
CC CC
can be eliminated and the termination is shown in Figure 2C.
CC
For V = 2.5V, the V - 2V is very close to ground level. The R3 in Figure 2B
OUT and nOUT are low impedance follower outputs that generate ECL/LVPECL
compatible outputs. Therefore, terminating resistors (DC current path to ground)
or current sources must be used for functionality. These outputs are designed to
drive 50W transmission lines. Matched impedance techniques should be used
to maximize operating frequency and minimize signal distortion. Figures 1A and
1B 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.
2.5V
2.5V
VCC=2.5V
R1
R3
250
250
Zo = 50 Ohm
Zo = 50 Ohm
+
-
2.5V LVPECL
2,5V LVPECL
Zo = 50Ω
Driver
R2
62.5
R4
62.5
OUT
FIN
Figure 2A: 2.5V LVPECL Driver Termination Example
Zo = 50Ω
50Ω
50Ω
2.5V
VCC=2.5V
VCC - 2V
1
Zo = 50 Ohm
Zo = 50 Ohm
RTT =
Zo
RTT
((VOH + VOL) / (VCC – 2)) – 2
+
-
Figure 1A: 3.3V LVPECL Output Termination
2.5V LVPECL
2,5V LVPECL
Driver
3.3V
R1
50
R2
50
125Ω
125Ω
R3
18
Z
o = 50Ω
o = 50Ω
OUT
FIN
Figure 2B: 2.5V LVPECL Driver Termination Example
Z
2.5V
VCC=2.5V
84Ω
84Ω
Zo = 50 Ohm
Zo = 50 Ohm
+
-
Figure 1B: 3.3V LVPECL Output Termination
2.5V LVPECL
Driver
Di
2,5V LVPECL
R1
50
R2
50
Figure 2C: 2.5V LVPECL Termination Example
ICS8Mx3 Datasheet Rev A
3 of 4
Revised 30Nov2004
Integrated Circuit Systems, Inc. ● Networking & Communications ● www.icst.com ● tel (508) 852-5400
ICS8M 3
X
Integrated
Circuit
Systems, Inc.
Crystal Oscillator: LVPECL CLOCK
O
UTPUT
PRELIMINARY
DEVICE PACKAGE OUTLINE - 6-pin, 5 x 7 x 1.5mm SMT CERHERMETIC
DIMENSION IN MM
NOMINAL TOLERANCE
SYMBOL
A
B
C
D1
D2
5
7
1.5
2.54
5.08
2.6
0.6
1.4
0.15
0.15
0.15
0.13
0.13
0.13
0.13
E
F
G
H
J
0.13
_
0.15 Ref.
0.65 Ref.
_
Device Package Outline
ORDERING INFORMATION
EXAMPLE OUTPUT FREQUENCIES
Part Number:
ICS8M x 3 -fff.fff r p t u
75.000
100.000
150.000
187.500
250.000
500.000
625.000
106.250
155.520
125.000
156.250
212.500
312.500
622.080
Device
200.000
311.040
600.000
750.000
Supply Voltage & Frequency Accuracy
G = 3.3V
H = 3.3V
± 50 ppm
±100 ppm
J = 2.5/3.3V ± 50 ppm
Consult ICS for the availability of other frequencies
K = 2.5/3.3V ±100 ppm
Output Type
EXAMPLE PART NUMBERS
3 = LVPECL
Part/Order Number
For option ...
Marking
Output Frequency (MHz)
Leading zeroes dropped. Fourth decimal place added if
necessary. See Standard Output Frequencies on right.
Consult ICS for other frequencies.
3.3 V
50 ppm
106.25 MHz
(blank) Commercial
Revision of Product
A = Initial Release
ICS8MG3-106.250AJ
(blank) Tube (60 per tube)
8MG3-106.250
Package Type (individual devices)
J = 5x7mm ceramic SMT
2.5/3.3 V
100 ppm
625.00 MHz
Industrial
Ambient Temperature Range
none = commercial = 0 to +70 o
C
I = industrial = -40 to +85 o
C
ICS8MK3-625.000AJIT
Tape & Reel
(1000)
8MK3-625.000
Bulk Packaging option
none = tube (60 devices per tube)
T = tape and reel (1000 devices)
Note: Lead-free by default (no additional “LF” code needed)
(Pb-free and RoHS compliant)
ICS8Mx3 Datasheet Rev A
4 of 4
Revised 30Nov2004
Integrated Circuit Systems, Inc. ● Networking & Communications ● www.icst.com ● tel (508) 852-5400
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