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M685-02-AH-AH

Description
SAW Oscillator, 669.3266MHz Nom
CategoryPassive components    oscillator   
File Size115KB,7 Pages
ManufacturerIDT (Integrated Device Technology)
Download Datasheet Parametric View All

M685-02-AH-AH Overview

SAW Oscillator, 669.3266MHz Nom

M685-02-AH-AH Parametric

Parameter NameAttribute value
Is it lead-free?Contains lead
Is it Rohs certified?incompatible
MakerIDT (Integrated Device Technology)
Reach Compliance Codecompliant
Other featuresNOMINAL FREQUENCY 669.3266 MHZ AVAILABLE
Maximum control voltage3.3 V
Minimum control voltage
maximum descent time0.425 ns
Frequency offset/pull rate120 ppm
frequency stability100%
JESD-609 codee0
linearity6%
Installation featuresSURFACE MOUNT
Nominal operating frequency669.3266 MHz
Maximum operating temperature85 °C
Minimum operating temperature-40 °C
Oscillator typeSAW OSCILLATOR
Output compatibilityLVPECL
physical size13.97mm x 8.89mm x 3.05mm
longest rise time0.425 ns
Maximum slew rate125 mA
Maximum supply voltage3.63 V
Minimum supply voltage2.97 V
Nominal supply voltage3.3 V
surface mountYES
maximum symmetry55/45 %
Terminal surfaceTin/Lead (Sn/Pb)
Preliminary Information
M685
FOUT
GND
nFOU
D
UAL
SAW, S
ELECTABLE
F
REQUENCY
VCSO
G
ENERAL
D
ESCRIPTION
The M685 is a dual SAW, selectable frequency VCSO
frequency source for low-jitter clock
generation. An integrated SAW (surface
acoustic wave) delay line implements the
high-Q VCO (voltage controlled oscillator)
function, which results in low output phase
noise and very low jitter. The M685-01 is available in
a range of center frequencies from 125 to 177 MHz.
The M685-02 provides 500 to 708 MHz. Guaranteed
minimum pull-range of
±120
ppm meets GbE
requirements. (It also fully satisfies
±50
ppm minimum
pull-range specification commonly required.) Industry-
standard Kvco (VCO Gain) provides full replacement
compatibility. The M685 is well suited for phase-locked
loop implementations, clock and data recovery circuits,
and other timing applications in telecom and optical
fiber networking systems (e.g., OC-48).
P
IN
A
SSIGNMENT
(5 x 7.5mm SMT)
VCC
6
5
M685
M680
2
3
(Top View)
VIN
1
Figure 1: Pin Assignment
Sample of Available Output Frequencies
VCSO Center
Frequencies
1
(MHz)
155.5200, 167.3316
156.2500, 161.1328
622.0800, 669.3266
625.0000, 644.5313
Applications
SONET/SDH, SONET/SDH FEC
Gigabit Ethernet, GbE FEC
SONET/SDH, SONET/SDH FEC
Gigabit Ethernet, GbE FEC
F
EATURES
Two integrated SAW devices and selectable output
frequency; supports multi-rate optical interfaces
M685-01 output frequencies from 125 to 177 MHz
M685-02 output frequencies from 500 to 708 MHz
(Specify center frequencies at time of order)
Industry-standard Kvco for full compatibility
Low phase jitter 0.2ps rms typical for the M685-02
(50kHz to 80MHz)
Differential 3.3V LVPECL output
Single 3.3V power supply
Small 5 x 7.5mm SMT (surface mount) package
Pb-free / Compliant to EC RoHS Directive
Table 1: Sample of Available Output Frequencies
Note 1: Specify VCSO center frequencies at time of order
B
LOCK
D
IAGRAM
M685
SAW Delay Line
VCSO
Phase
Shifter
F_SEL
VIN
SAW Delay Line
FOUT
nFOUT
VCSO
Phase
Shifter
F_SEL
Figure 2: Block Diagram
M685 Datasheet Rev 0.7
M685 Dual SAW, Selectable Frequency VCSO
I n t e g r a t e d D e v i c e Te c h n o l o g y, I n c .
C o m m u n i c a t i o n M o d u l e s
w w w. i d t . c o m
t e l ( 5 0 8 ) 8 5 2 - 5 4 0 0
4
Revised 29Jul2009
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