Rev 2; 6/08
DS4-XO Series Crystal Oscillators
General Description
The DS4125, DS4150, DS4155, DS4156, DS4160,
DS4250, DS4300, DS4311, DS4312, DS4622, and
DS4776 ceramic surface-mount crystal oscillators are
part of Maxim’s DS4-XO series of crystal oscillators.
These devices offer output frequencies at 125MHz,
155.52MHz, 156.25MHz, 160MHz, 311.04MHz, 312.5MHz,
622.08MHz, and 77.76MHz. The clock oscillators are
suited for systems with tight tolerances because of the
jitter, phase noise, and stability performance. The small
package provides a format made for applications
where PCB space is critical.
These clock oscillators are crystal based and use a fun-
damental crystal with PLL technology to provide the
final output frequencies. Each device is offered with
LVDS or LVPECL output types. The output enable pin is
active-high logic.
These clock oscillators have very low phase jitter and
phase noise. Typical phase jitter is < 0.7ps
RMS
from
12kHz to 20MHz. The devices are designed to operate
with a 3.3V ±5% supply voltage, and are available in a
5.0mm x 3.2mm x 1.49mm, 10-pin LCCC surface-mount
ceramic package.
Features
♦
< 0.7ps
RMS
from 12kHz to 20MHz Jitter
♦
LVDS or LVPECL Output Types
♦
3.3V Operating Voltage
♦
5.0mm x 3.2mm x 1.49mm, 10-Pin LCCC Ceramic
Package
♦
-40°C to +85°C Operating Temperature Range
♦
Lead-Free/RoHS Compliant
DS4125–DS4776
Ordering Information
PART
DS4125D+
DS4125P+
DS4150D+
DS4150P+
DS4155D+
DS4155P+
DS4156D+
DS4156P+
DS4160D+
DS4160P+
DS4250D+
DS4250P+
DS4300D+
DS4300P+
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
10 LCCC
10 LCCC
10 LCCC
10 LCCC
10 LCCC
10 LCCC
10 LCCC
10 LCCC
10 LCCC
10 LCCC
10 LCCC
10 LCCC
10 LCCC
10 LCCC
Applications
InfiniBand
BPON/GPON
Ethernet
10GbE
SONET/SDH
+Denotes
a lead(Pb)-free/RoHS-compliant package. The lead
finish is JESD97 category e4 (Au over Ni) and is compatible with
both lead-based and lead-free soldering processes.
Pin Configuration and Selector Guide appear at end of
data sheet.
Ordering Information continued at end of data sheet.
Typical Operating Circuits
V
CC
0.1μF
0.01μF
OUTP
0.1μF
0.01μF
V
CC
OUTP
50Ω
DS4125–DS4776
OE
GND
OUTN
100Ω
DS4125–DS4776
OE
GND
OUTN
50Ω
PECL_BIAS
V
CC
- 2.0V
LVDS OPTION
LVPECL OPTION
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
DS4-XO Series Crystal Oscillators
DS4125–DS4776
ABSOLUTE MAXIMUM RATINGS
Power-Supply Voltage (V
CC
) .......................................-0.3V, +4V
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range ...............................-55°C to +85°C
Soldering Temperature Profile
(3 passes max of reflow) ......................Refer to the IPC/JEDEC
J-STD-020 Specification.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(V
CC
= 3.135V to 3.465V, T
A
= -40°C to +85°C, unless otherwise noted.)
PARAMETER
Operating Voltage Range
Operating Current
Output Frequency
Oscillator Startup Time
Frequency Stability
Frequency Stability Over
Temperature with Initial Tolerance
Initial Tolerance
Frequency Change Due to V
CC
Frequency Change Due to Load
Variation
Aging (15 Years)
SYMBOL
V
CC
I
CC_D
I
CC_PU
I
CC_PI
f
OUT
t
STARTUP
f
TOTAL
f
TEMP
f
INITIAL
f
VCC
f
LOAD
f
AGING
Integrated phase RMS; 12kHz to 5MHz,
V
CC
= 3.3V, T
A
= +25°C
Jitter
J
RMS
Integrated phase RMS; 12kHz to 20MHz,
V
CC
= 3.3V, T
A
= +25°C
Integrated phase RMS; 12kHz to 80MHz,
V
CC
= 3.3V, T
A
= +25°C
Input-Voltage High (OE)
Input-Voltage Low (OE)
Input Leakage (OE)
V
IH
V
IL
I
LEAK
(Note 1)
(Note 1)
GND
OE
V
CC
0.7 x
V
CC
0
-50
(Note 2)
Over temperature range, aging, load,
supply, and initial tolerance (Note 3)
V
CC
= 3.3V
V
CC
= 3.3V, T
A
= +25°C
V
CC
= 3.3V
±5%
±10%
variation in termination
resistance
-7
0.7
0.7
1.0
V
CC
0.3 x
V
CC
+5.0
V
V
μA
ps
-3
±1
+7
-50
-35
±20
+3
f
NOM
(Note 1)
LVDS, output loaded or unloaded
LVPECL, output unloaded
LVPECL, output load 50
at V
CC
- 2.0V
CONDITIONS
MIN
3.135
TYP
3.3
52
49
74
f
NOM
50
+50
+35
MAX
3.465
75
70
100
MHz
ms
ppm
ppm
ppm
ppm/V
ppm
ppm
mA
UNITS
V
2
_______________________________________________________________________________________
DS4-XO Series Crystal Oscillators
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= 3.135V to 3.465V, T
A
= -40°C to +85°C, unless otherwise noted.)
PARAMETER
LVDS
Output High Voltage
Output Low Voltage
Differential Output Voltage
Output Common-Mode Voltage
Variation
Change in Differential Magnitude
or Complementary Inputs
Offset Output Voltage
Differential Output Impedance
Output Current
Output Rise Time (Differential)
Output Fall Time (Differential)
Duty Cycle
Propagation Delay from OE Going
LOW to Logical 1 at OUTP
Propagation Delay from OE Going
HIGH to Output Active
LVPECL
Output High Voltage
Output Low Voltage
Differential Voltage
Rise Time
Fall Time
Duty Cycle
Propagation Delay from OE Going
LOW to Output High Impedance
Propagation Delay from OE Going
HIGH to Output Active
V
OH
V
OL
V
DIFF_PECL
t
R-PECL
t
F-PECL
D
CYCLE_PECL
t
PAZ
t
PZA
45
Output connected to 50
at V
CC
- 2.0V
Output connected to 50
at V
CC
- 2.0V
Output connected to 50
at V
CC
- 2.0V
at PECL_BIAS
at PECL_BIAS
at PECL_BIAS
V
CC
-
1.085
V
CC
-
1.825
0.595
0.710
200
200
55
200
200
V
CC
-
0.88
V
CC
-
1.62
V
V
V
ps
ps
%
ns
ns
V
OHLVDSO
V
OLLVDSO
|
V
ODLVDSO
|
V
LVDSOCOM
|
V
ODLVDSO
|
V
OFFLVDSO
R
OLVDSO
L
VSSLVDSO
L
LVDSO
t
RLVDSO
t
FLVDSO
D
CYCLE_LVDS
t
PA1
t
P1A
OUTN or OUTP shorted to ground and
measure the current in the shorting path
OUTN or OUTP shorted together
20% to 80%
80% to 20%
45
6.5
175
175
55
200
200
ps
ps
%
ns
ns
100
100
100
100
100
100
differential load (Note 1)
differential load (Note 1)
differential load
differential load
differential load
differential load (Note 1)
1.125
80
0.925
250
425
150
25
1.275
140
40
mA
1.475
V
V
mV
mV
mV
V
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
DS4125–DS4776
Note 1:
All voltages referenced to ground.
Note 2:
AC parameters are guaranteed by design and not production tested.
Note 3:
Frequency stability is calculated as:
Δf
TOTAL
=
Δf
TEMP
+
Δf
VCC
x (3.3 x 5%) +
Δf
LOAD
+
Δf
AGING
.
_______________________________________________________________________________________
3
DS4-XO Series Crystal Oscillators
DS4125–DS4776
SINGLE-SIDEBAND PHASE NOISE AT f
O
= f
NOM
f
M
=
10Hz
100Hz
1kHz
10kHz
100kHz
1MHz
10MHz
20MHz
SINGLE-SIDEBAND PHASE NOISE AT f
O
= f
NOM
(dBc/Hz)
77.76MHz
-60
-95
-122
-126
-131
-143
-149
-153
125.00MHz
-70
-100
-120
-120
-125
-142
-149
-153
155.52MHz
-70
-100
-120
-120
-125
-142
-149
-153
156.25MHz
-70
-100
-120
-120
-125
-142
-149
-153
160.00MHz
-70
-100
-120
-120
-125
-142
-149
-153
311.04MHz
-65
-95
-113
-113
-118
-137
-149
-153
312.5MHz
-65
-95
-113
-113
-118
-137
-149
-153
622.08MHz
-60
-90
-107
-107
-113
-131
-147
-150
Typical Operating Characteristics
(V
CC
= +3.3V, T
A
= +25°C, unless otherwise noted.)
FREQUENCY vs. TEMPERATURE
15
13
10
8
5
3
0
-3
-5
-8
-10
-13
-15
-18
-20
-40
-20
0
20
40
60
80
TEMPERATURE (°C)
DS4125/776 toc01
OPERATING CURRENT (DS4155)
vs. OPERATING VOLTAGE
+40°C
+70°C
+25°C
DS4125/776 toc02
55
+85°C
53
I
CC
(mA)
f
OUT
DEVIATION (ppm)
50
0°C
48
-40°C
45
3.135 3.185 3.235 3.285 3.335 3.385 3.435
V
CC
(V)
Pin Description
PIN
1
2, 7–10
3
4
5
6
—
NAME
OE
N.C.
GND
OUTP
OUTN
V
CC
EP
No Connection. Must be floated.
Ground
Positive Output for LVPECL or LVDS
Negative Output for LVPECL or LVDS
Supply Voltage
Exposed Paddle. Do not connect this pad or place exposed metal under the pad.
FUNCTION
Active-High Output Enable. Has an internal pullup 100k
resistor.
4
_______________________________________________________________________________________
DS4-XO Series Crystal Oscillators
DS4125–DS4776
V
CC
X1
TRI-
STATE
PHASE
DET
LC-VCO
FILTER
/n
OUTSELN
OUTDRV
OE
OUTP
X2
OUTN
DS4125–DS4776
/m
GND
Figure 1. Functional Diagram
Detailed Description
The devices consist of a fundamental-mode, AT-cut
crystal and a synthesizer IC that can synthesize any
one of these frequencies: 77.76MHz, 125MHz,
150MHz, 155.52MHz, 156.25MHz, 160MHz, 250MHz,
300MHz, 311.04MHz, 312.5MHz, and 622.08MHz.
All devices support two types of differential output dri-
vers: LVDS and LVPECL. When the OE signal is low,
LVPECL outputs go to the PECL_BIAS level of
V
CC
- 2.0V, while the LVDS outputs are a logical one.
See Figures 2 and 3 for an LVDS and LVPECL output
timing diagram.
Additional Information
For more available frequencies, refer to the DS4106
data sheet at
www.maxim-ic.com/DS4106.
0.7 x V
CC
OE
0.3 x V
CC
t
P1A
t
PA1
OE
0.7 x V
CC
0.3 x V
CC
t
PZA
t
PAZ
PECL_BIAS
OUTP
OUTP
OUTN
PECL_BIAS
OUTN
PECL_BIAS
PECL_BIAS
Figure 2. LVDS Output Timing Diagram When OE Is Enabled
and Disabled
Figure 3. LVPECL Output Timing Diagram When OE Is Enabled
and Disabled
_______________________________________________________________________________________
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