PRELIMINARY
ICS8MX3
Integrated
Circuit
Systems, Inc.
LVPECL CLOCK OSCILLATOR
ICS8MX3
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 75MHz to 750MHz
• One differential LVPECL clock output
• Output Enable (OE) pin (high impedance – when low)
• Small 6-pin 5mm x 7mm x 1.5mm SMT ceramic package
• Low profile package allows back-side PCB mounting
• Pb-free RoHS compliant (by default; no additional code required)
• 3.3V or 2.5V device power supply options
8Mx3
(Top View )
O
O
• Commercial (0 to +70 C) and Industrial (-40 to +85 C) temperatures
• Frequency stability of 50ppm or 100ppm
(including initial accuracy, operating temperature variation, supply voltage
variation, load variation, reflow drift, and aging for 10 years)
• Low phase jitter < 1 ps rms maximum (12kHz to 20MHz)
6-pin CERHERMETIC 5mm x 7mm x 1.5mm SMT
ELECTRICAL SPECIFICATIONS
Unless stated otherwise, VCC = 3.3V 5ꢀ or 2.5V 5ꢀ, TA = 0°C to +70°C (commercial), TA = -40°C to +85°C (industrial)
Specifications
Min.
Typ.
Max.
Units
Item
Symbol
Test Conditions
DC Characteristics
Power Supply
(VCC, VEE pins)
3.135
2.375
3.3
2.5
75
3.465
2.625
V
V
3.3V operation
2.5V operation (8MJ3 and 8MK3 only)
Power Supply Voltage
VCC
Power Supply Current
Current w/Output Disabled
Input Capacitance
IEE
mA
mA
pF
V
OE = VCC
OE = VEE
IOED
CIN
VIH
<0.6
4
Output Enable
(OE pin)
LVCMOS/LVTTL
Input High Voltage
0.7 * VCC
-150
Input Low Voltage
VIL
0.3 * VCC
5
V
Input High Current
IIH
µA
µA
VCC = VIN = 3.465V or 2.625V
Input Low Current
IIL
VCC = 3.465V or 2.625V, VIN
=
0V
Internal Pullup Resistor
Output High Voltage1
RPULLUP
VOH
51
kΩ
Clock Output
Level
(OUT, nOUT)
LVPECL
Outputs terminated with 50
See Parameter Measurement Information,
Output Load AC Test Circuit diagrams.
See Parameter Measurement Information,
Output Rise/Fall Time diagram
Ω
to VCC - 2V.
VCC - 1.4
VCC - 2.0
VCC - 0.9
VCC - 1.7
V
Output Low Voltage1
VOL
V
Peak-to-Peak Output
Voltage Swing
VSWSING
0.6
1.0
V
AC Characteristics
Output
(OUT, nOUT)
Output Frequency Range
75
750
100
50
MHz
All conditions
ppm p-p 8MH3 & 8MK3
ppm p-p 8MG3 & 8MJ3
ꢀ
Includes frequency set, VCC, TA and
load variation, reflow drift, 10 yr. aging
Frequency Stability Error
Δ
f/fO
Output Duty Cycle
Output Rise Time
Output Fall Time
odc
tR
50
See Output Duty Cycle Diagram
and Rise/Fall Time Diagram in
Parameter Measurement Information
600
600
10
ps
20ꢀ to 80ꢀ
of VOH - VOL
tF
ps
ms
Oscillator Start-up Time
RMS Phase Jitter, Random2 t jit (Ø)
tOSC
Time at Min. VCC (3.135V or 2.375V) to be 0s
design target
<1
ps rms
ps
3
Jitter
tDS
tRS
0.2
3
Deterministic
3
ps
Random, σ of random jitter
Root Mean Square,
3
tRMS
3
ps
σ of total jitter distribution
3
tP-P
25
4
ps
Peak-to-Peak
3
tacc
ps
Accumulated Jitter, n = 2 to 50,000 cycles
NOTE 1: Outputs terminated with 50Ω to VCC - 2V. See Parameter Measurement Information, Output Load AC Test Circuit diagrams.
NOTE 2: Measured using an Aeroflex PN9500 with a 12kHz to 20MHz integration range.
NOTE 3: Measured using a Wavecrest SIA-3000.
Supply Voltage & Frequency Accuracy
G =
H =
J =
3.3V / 3.3V
3.3V / 3.3V
2.5V / 3.3V
2.5V / 3.3V
50 ppm
100 ppm
50 ppm
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, Incorpo-
rated (ICS) reserves the right to change any circuitry or specifications without notice.
K =
100 ppm
8Mx3AJ
www.icst.com/products/hiperclocks.html
REV. B JUNE 6, 2005
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