M685-01-BD-BD [IDT]
SAW Oscillator, 161.1328MHz Nom;
| 型号： | M685-01-BD-BD |
| 厂家： | 
INTEGRATED DEVICE TECHNOLOGY |
| 描述： | SAW Oscillator, 161.1328MHz Nom |
| 文件： | 总7页 (文件大小：114K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
P r e l i m i n a r y I n f o r m a t i o n
M685
D
UAL SAW, SELECTABLE FREQUENCY VCSO
G
ENERAL
D
ESCRIPTION
PIN
ASSIGNMENT (5 x 7.5mm SMT)
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
M685
M680
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).
(Top View)
Figure 1: Pin Assignment
Sample of Available Output Frequencies
VCSO Center
Applications
Frequencies1 (MHz)
F
EATURES
◆ Two integrated SAW devices and selectable output
frequency; supports multi-rate optical interfaces
155.5200, 167.3316
156.2500, 161.1328
622.0800, 669.3266
625.0000, 644.5313
SONET/SDH, SONET/SDH FEC
◆ 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)
Gigabit Ethernet, GbE FEC
SONET/SDH, SONET/SDH FEC
Gigabit Ethernet, GbE FEC
◆ Industry-standard Kvco for full compatibility
◆ Low phase jitter 0.2ps rms typical for the M685-02
(50kHz to 80MHz)
Table 1: Sample of Available Output Frequencies
Note 1: Specify VCSO center frequencies at time of order
◆ 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
B
LOCK
D
IAGRAM
M685
SAW Delay Line
Phase
Shifter
VCSO
FOUT
VIN
nFOUT
SAW Delay Line
Phase
VCSO
Shifter
F_SEL
Figure 2: Block Diagram
M685 Datasheet Rev 0.7
Revised 29Jul2009
M685 Dual SAW, Selectable Frequency VCSO
Integrated Device Technology, Inc. ● Communication Modules ● www.idt.com ● tel (508) 852-5400
M685
D
UAL SAW, SELECTABLE
F
REQUENCY VCSO
P r e l i m i n a r y I n f o r m a t i o n
PIN
D
ESCRIPTIONS
I/O
Input
Number
Name
VIN
Configuration
Description
Frequency control input.
1
Frequency select:
1
2
F_SEL
GND
Input
Internal pull-down resistor
Logic
Logic
1
0
selects Frequency 2
selects Frequency 1
.
.
3
Ground
Power supply ground connection.
4
5
FOUT
nFOUT
Output
Power
No internal terminator
Clock output pair. Differential LVPECL.
6
VCC
Power supply connection, connect to +3.3V.
Table 2: Pin Descriptions
Note 1: See “Frequency Select” in Table 5 (DC Characteristics for M685-01 on pg. 3) and Table 7 (DC Characteristics for M685-02 on pg. 4).
1
A
BSOLUTE
M
AXIMUM
R
ATINGS
Symbol Parameter
Rating
Unit
VI
Inputs
-
-
0.5 to VCC
0.5 to VCC
4.6
+
0.5
0.5
V
VO
VCC
TS
Outputs
+
V
V
Power Supply Voltage
Storage Temperature
-55 to +125
oC
Table 3: Absolute Maximum Ratings
Note 1: 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 Recommended Conditions of Operation, DC Characteristics, or
AC Characteristics is not implied. Exposure to absolute maximum rating conditions for extended periods
may affect product reliability
.
R
ECOMMENDED
C
ONDITIONS OF
O
PERATION
Symbol Parameter
Min
Typ
Max
Unit
VCC
Positive Supply Voltage
2.97
3.3
3.63
V
oC
-
40
25
TA
Ambient Operating Temperature
+85
Table 4: Recommended Conditions of Operation
M685 Datasheet Rev 0.7
2 of 7
Revised 29Jul2009
Integrated Device Technology, Inc. ● Communication Modules ● www.idt.com ● tel (508) 852-5400
M685
D
UAL SAW, SELECTABLE
F
REQUENCY VCSO
P r e l i m i n a r y I n f o r m a t i o n
E
LECTRICAL
SPECIFICATIONS FOR M685-01
DC Characteristics for M685-01
Unless stated otherwise, VCC = 3.3 Volts + 10%, TA = 0 to 85 oC, VCSO Freq.’s = 155.52, 167.3316MHz, Outputs terminated into 180
Ω to ground
Symbol Parameter
Power Supply VCC Positive Supply Voltage
Pin
Min
2.97
Typ
3.3
Max
3.63
Unit
V
VCC
VIN
90
125
3.3
ICC
VIN
Power Supply Current
Input Control Voltage Range
VIN Input Impedence
Input High Voltage
mA
V
0
Control
Voltage
100
kΩ
V
2
Frequency
1
VIH
VIL
V + 0.3
cc
Select
0.8
Input Low Voltage
-0.3
V
IIH
IIL
R
Input High Current
5
µA
µA
kΩ
F_SEL
Input Low Current
-150
51
Internal Pull-down Resistor
pulldown
Differential
Outputs
VOH
VOL
VP
Output High Voltage
Output Low Voltage
Peak to Peak Output Voltage
Output Current
V
V
-
-
0.98
1.95
V
-
-
0.75
V
cc
cc
cc
cc
V
1.63
V
FOUT, nFOUT
2
0.450
0.625
0.85
20
VP
-P
-P
IOUT
mA
Table 5: DC Characteristics for M685-01
Note 1: Internally pulled down to Logic 0 (Frequency 1) if left unselected.
Note 2: Single-ended measurement. See Figure 3, Output Rise and Fall Time, on pg. 5.
AC Characteristics for M685-01
Unless stated otherwise, VCC = 3.3 Volts + 10%, TA = 0 to 85 oC, VCSO Freq.’s = 155.52, 167.3316MHz, Outputs terminated into 180
Ω to ground
Symbol Parameter
Control Voltage VIN Modulation Bandwidth
Min
Typ
600
Max
Unit Notes
kHz
VIN
Output Center Frequency Range M685-01
125
177
Output
FOUT
APR
MHz
ppm
1
Absolute (Guaranteed) Pull-Range
±120
100
6
fSTAB
LIN
Frequency Stability
Tuning Linearity
ppm p-p At any givin VIN
VIN
= 0.3 to 3.0V
%
Best fit straight line
VIN
=
0.3 to 3.0
V
@
155.52MHz
400
-77
KVCO
VCO Gain
ppm/V
-50
Non-harmonic Spurious
dBc
100Hz Offset
1kHz Offset
-48
-75
Φ n
SSB (single sideband)
Phase Noise, offset
from carrier
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
ps rms
ps rms
%
10kHz Offset
100kHz Offset
1MHz Offset
-99
@
155.52MHz
-124
-142
0.30
0.18
12kHz to 20MHz
50kHz to 80MHz
J(t)
Jitter (rms)
155.52MHz
@
2
45
55
odc
tR
Output Duty Cycle
2
275
275
425
425
Output Rise Time for FOUT, nFOUT
ps
ps
20% to 80
%
%
2
tF
Output Fall Time for FOUT, nFOUT
20% to 80
Table 6: AC Characteristics for M685-01
Note 1: Also fully meets ±50 ppm minimum pull-range specification that is commonly required.
Note 2: See Parameter Measurement Information on pg. 5.
M685 Datasheet Rev 0.7
3 of 7
Revised 29Jul2009
Integrated Device Technology, Inc. ● Communication Modules ● www.idt.com ● tel (508) 852-5400
M685
D
UAL SAW, SELECTABLE
F
REQUENCY VCSO
P r e l i m i n a r y I n f o r m a t i o n
E
LECTRICAL
SPECIFICATIONS FOR M685-02
DC Characteristics for M685-02
Unless stated otherwise, VCC = 3.3 Volts + 10%, TA = 0 to 85 oC, VCSO Freq.’s = 622.08, 669.3266MHz, Outputs terminated into 180
Ω to ground
Symbol Parameter
Power Supply VCC Positive Supply Voltage
Pin
Min
2.97
Typ
3.3
Max
3.63
Unit
V
VCC
VIN
90
125
3.3
ICC
VIN
Power Supply Current
Input Control Voltage Range
VIN Input Impedence
Input High Voltage
mA
V
0
Control
Voltage
100
kΩ
V
2
Frequency
1
VIH
VIL
V + 0.3
cc
Select
0.8
Input Low Voltage
-0.3
V
IIH
IIL
R
Input High Current
5
µA
µA
kΩ
F_SEL
Input Low Current
-150
51
Internal Pull-down Resistor
pulldown
Differential
Outputs
VOH
VOL
VP
Output High Voltage
Output Low Voltage
Peak to Peak Output Voltage
Output Current
V
V
-
-
0.98
1.95
V
-
-
0.75
V
cc
cc
cc
cc
V
1.63
V
FOUT, nFOUT
2
0.450
0.625
0.85
20
VP
-P
-P
IOUT
mA
Table 7: DC Characteristics for M685-02
Note 1: Internally pulled down to Logic 0 (Frequency 1) if left unselected.
Note 2: Single-ended measurement. See Figure 3, Output Rise and Fall Time, on pg. 5.
AC Characteristics for M685-02
Unless stated otherwise, VCC = 3.3 Volts + 10%, TA = 0 to 85 oC, VCSO Freq.’s = 622.08, 669.3266MHz, Outputs terminated into 180
Ω to ground
Symbol Parameter
Control Voltage VIN Modulation Bandwidth
Min
Typ
600
Max
Unit Notes
kHz
VIN
Output Center Frequency Range M685-02
500
708
Output
FOUT
APR
MHz
ppm
1
Absolute (Guaranteed) Pull-Range
±120
100
6
fSTAB
LIN
Frequency Stability
Tuning Linearity
ppm p-p At any givin VIN
VIN
= 0.3 to 3.0V
%
Best fit straight line
VIN
=
0.3 to 3.0
V
@
622.08MHz
400
-77
KVCO
VCO Gain
ppm/V
-50
Non-harmonic Spurious
dBc
100Hz Offset
1kHz Offset
-42
-72
Φ n
SSB (single sideband)
Phase Noise, offset
from carrier
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
ps rms
ps rms
%
10kHz Offset
100kHz Offset
1MHz Offset
-102
-127
-146
0.22
0.16
@
622.08MHz
12kHz to 20MHz
50kHz to 80MHz
J(t)
Jitter (rms)
622.08MHz
@
2
45
55
odc
tR
Output Duty Cycle
2
275
275
400
400
Output Rise Time for FOUT, nFOUT
ps
ps
20% to 80
%
%
2
tF
Output Fall Time for FOUT, nFOUT
20% to 80
Table 8: AC Characteristics for M685-02
Note 1: Also fully meets ±50 ppm minimum pull-range specification that is commonly required.
Note 2: See Parameter Measurement Information on pg. 5.
M685 Datasheet Rev 0.7
4 of 7
Revised 29Jul2009
Integrated Device Technology, Inc. ● Communication Modules ● www.idt.com ● tel (508) 852-5400
M685
D
UAL SAW, SELECTABLE
F
REQUENCY VCSO
P r e l i m i n a r y I n f o r m a t i o n
PARAMETER
M
EASUREMENT NFORMATION
I
Output Rise and Fall Time
Output Duty Cycle
nFOUT
80%
80%
V
P-P
20%
t
F
20%
Clock
Outputs
FOUT
t
R
t
PW
(Output Pulse Width)
t
PERIOD
t
PW
Figure 3: Output Rise and Fall Time
odc =
t
PERIOD
Figure 4: Output Duty Cycle
D
EVICE
PACKAGE
-
5 x 7.5mm SMT (Surface Mount) Package
Mechanical Dimensions:
M685
-02-AA-AH
Dimensions are in mm;
dimensions in [ ] are in inches
Unless otherwise specified, all
dimensions are ±0.13 [0.005]
Figure 5: Device Package - 5 x 7.5mm SMT (Surface Mount) Package
M685 Datasheet Rev 0.7
5 of 7
Revised 29Jul2009
Integrated Device Technology, Inc. ● Communication Modules ● www.idt.com ● tel (508) 852-5400
P r e l i m i n a r y I n f o r m a t i o n
UAL SAW, SELECTABLE
M685
REQUENCY VCSO
D
F
O
RDERING NFORMATION
I
Part Numbering Scheme
M685-01 Standard Output Frequencies & Order Codes
125.0000 DA
155.5200 BA
156.2500 BB
156.8324 BC
161.1328 BD
166.6286 BE
167.2820 BF
167.3280 BG
167.3316 BH
167.7097 BI
168.0407 BJ
172.6423 BK
173.3708 BL
164.3555 BM
153.6000 BO
118.7500 BP
176.8382 BQ
156.1762 BR
174.1537 BU
174.7031 BV
Part Number:
MM668850-01y-xx-xx
Device Number
Variant
-01 = Output Frequencies 125 - 177 MHz
-02 = Output Frequencies 500 - 708 MHz
Output Frequency 1 Order Code
Output Frequency 2 Order Code
See Tables 10 and 11 at right for frequency order codes.
Consult ICS for other frequencies and order codes.
Figure 6: Part Numbering Scheme
Example Order Numbers
For Output Frequencies (MHz)
Frequency 1 Frequency 2
Order Part Number
M685-0y-xx-xx
Table 10: M685-01 Standard Output Frequencies & Order Codes
,
M685-02 Standard Output Frequencies & Order Codes
155.5200, 167.3316
156.2500, 161.1328
622.0800, 669.3266
625.0000, 644.5313
M685-01-BA-BH
500.0000 CA
622.0800 AA
625.0000 AB
627.3296 AC
644.5313 AD
666.5143 AE
669.1281 AF
669.3120 AG
669.3266 AH
670.8386 AI
672.1627 AJ
690.5692 AK
693.4830 AL
657.4219 AM
614.4000 AO
475.0000 AP
707.3527 AQ
624.7048 AR
696.6149 AU
698.8123 AV
M685-01-BB-BD
M685-02-AA-AH
M685-02-AB-AD
Table 9: Example Order Numbers
Table 11: M685-02 Standard Output Frequencies & Order Codes
Consult IDT for the availability of other frequencies
While the information presented herein has been checked for both accuracy and reliability, Integrated Circuit Systems (ICS)
assumes no responsibility for either its use or for the 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.
M685 Datasheet Rev 0.7
6 of 7
Revised 29Jul2009
Integrated Device Technology, Inc. ● Communication Modules ● www.idt.com ● tel (508) 852-5400
E r r a t a
UAL SAW, SELECTABLE FREQUENCY VCSO
M685
D
PRODUCT
A
PPLICATION
C
AUTION
M685E1
F_SEL Change During Power-Up Can Affect Output Frequency Accuracy
The M685 features an F_SEL input which is used to select the internal VCSO frequency.
The F_SEL input logic level should not be changed while the M685 device is in operation (that is, voltage
is applied to the pin VCC), particularly when the pin VIN (the control voltage input) is above 2.0V.
Changing the F_SEL input logic level during operation may result in an erroneous output frequency.
It is safe to change F_SEL during operation if pin VIN can be held low, or at least below 2.0V.
M685 Datasheet Rev 0.7 - Errata
Revised 29Jul2009
Integrated Device Technology, Inc. ● Communication Modules ● www.idt.com ● tel (508) 852-5400
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