Voltage Controlled Temperature Compensated Crystal
Oscillators VCTCXO, VM57T Series, CMOS Output
Features:
5x7x2.5 mm ceramic SMD VCTCXOs with CMOS square wave output
0.01 uF decoupling capacitor built-in
Wide frequency range: 1.0 MHz to 156.0 MHz
Frequency stability as tight as ±0.5 ppmover 0°C to +50°C or
±1 ppm over -40 to +85°C
General Specifications
(at+25°C and specified input voltage)
Product Series
Frequency Range
Output Wave From
Initial Calibration Tolerance
(1)
Standard Frequencies (partial list)
MERCURY
Since 1973
Frequency Stability (ppm)
Temperature
0 to +50°C
Range
-10 to +60°C
-20 to +70°C
-30 to +75°C
Standard
-40 to +85°C
Frequency Stability
vs Aging
±1.0 ppm max. first year at +25°C
vs Voltage Change
±0.3 ppm max. for a ±5% input voltage change
vs Load Change
±0.3 ppm max. for a ±10% loading condition change
±1 ppm max. 1 reflow and measured 24 hours afterwards
vs Reflow
Supply Voltage
+2.8 V
+3.0 V
+3.3 V
+5.0 V
(V
DD
)
(voltage code is “28”)
(voltage code is “3”)
(voltage code is “33”)
(voltage code is “5”)
2 mA @ 8.192MHz
2 mA @ 8.192MHz
5 mA @ 8.192MHz
Current
3 mA @ 10 MHz
4 mA @ 10 MHz
7 mA @ 10 MHz
Consumption
14 mA @77.760 MHz
17 mA @77.760 MHz
32 mA @77.760 MHz
(typical)
26 mA @ 155.520 MHz
35 mA @ 155.520 MHz
50 mA @ 155.520 MHz
Output Voltage Level
Logic “1”
Logic “0”
90% V
DD
min.
10% V
DD
max.
10 nano. sec. max. 20%
↔
80% of waveform
50%±10% measured at 50% waveform
10 m. sec. max.
Frequency
Deviation Range
Slope Polarity
Linearity
Offset
±10 ppm typical with Vcontrol centered at = +1.5 V and Vcontrol range of ±1.0 V
Positive:
Positive voltage for positive frequency shift
±10
% max.
15 pF
10 Hz
100 Hz
1 kHz
10 kHz
100 kHz
1 MHz
5 MHz
VM57T
1.0 MHz ~ 156.0 MHz
NOTE: 32.768 KHz is also available
Square
wave. Wave form code is “T”
±2 ppm at +25°C±2°C and Vcon = +1.5 V D.C.
10.0, 12.8, 13.0, 14.4, 16.0, 16.384, 19.2, 19.440, 19.680, 20.0, 38.880 , 77.760 ,
155.520 MHz
±0.5 pppm ± 1 ppm
±1.5 ppm
±2.0 ppm
±2.5 ppm
√:
Available
√
√
√
√
√
: Call us
√
√
√
√
: N/A
√
√
√
√
(Not
√
√
√
√
available)
√
√
√
√
Rise Time and Fall Time
Duty Cycle (Symmetry)
Start-up Time
Electronic
Frequency Tuning
on pad 1.
(VCTCXO only)
Output Load
SSB Phase Noise
Taiwan: TEL (886)-2-2406-2779, FAX (886)-2-2496-0769, e-mail:
sales-tw@mercury-crystal.com
U.S.A.: TEL (1)-909-466-0427, FAX (1)-909-466-0762, e-mail:
sales-us@mercury-crystal.com
MERCURY
Page 1 of 3
Date: May 1, 2008
Revision: 4
MERCURY www.mercury-crystal.com
Voltage Controlled Temperature Compensated Crystal
Oscillators VCVCTCXO, VM57T Series, CMOS Output
at +25°C
(dBc/Hz)
VM57T33-10.000
-93
-117
-137
-144
(see plot below)
VM57T33-155.520
-62
-88
-111
-121
(1)
:
Frequency stability over temperature will be from this measured initial frequency.
VM57T33-10.000
V control= 1.5 V
MERCURY
Since 1973
-144
-116
-151
-107
-152
-122
Part Number Format and Example:
Part number example:
VM57T
3
—
VM57T3-20.000-2.5/-30+75
20.000
—
2.5
⁄
-30+75
= Please specify
: Product Series
use “5” for +5.0 V
: Voltage code; Use”28” for +2.8 V; use “3” for +3.0 V; use “33” for +3.3 V;
: Frequency in MHz
: Frequency stability
: Operating Temperature range in °C
CMOS Square Wave VCTCXO Test Circuit:
Clock Out
A
0.1uF
+ +
- V
-
4
VM57T
MEC
+
-
3
15
pF *
80%
50%
T2
T1
1
2 * Include all the
20%
probe and stray
capacitances
Tr
Tf Duty Cycle = T1 *100%
T2
Environment Performance Specifications
Green Requirement
MSL Level
Humidity
Hermeticity
Solderability
Vibration
Shock
Storage temp. range
RoHS compliant, Pb (lead) free
MSL 1 per IPC/JEDEC-STD-020C
85% RH, 85°C, 48 hours
Leak rate 2x10
-8
ATM-cm
3
/sec max. Crystal part only.
MIL-STD-202F method 208E
MIL-STD-202F method 204, 35G, 50 to 2000 Hz
MIL-STD-202F method 213B, test condi. E, 1000GG ½ sine wave
-55 to +125°C
MERCURY
Page 2 of 3
Date: May 1, 2008
Revision: 4
Voltage Controlled Temperature Compensated Crystal
Oscillators VCVCTCXO, VM57T Series, CMOS Output
Package Dimensions and Suggested Land Pattern:
[0.275± 0.006]
7.00± 0.15
4
3
[0.024]
0.6
3
2
4
1
MERCURY
Since 1973
Unit: mm
[0.055]
1.4
[0.197± 0.006]
5.00± 0.15
MEC
2
2.5± 0.2
[0.098± 0.008]
0.55 [0.022]
[0.004]
0.1
1
Epoxy encapsulation
[0.049]
1.25
VM57T_
R0
.7
5.08 [0.200]
typical
Bottom view
2.2[0.086]
2.0[0.079]
Pad 1
Pad 2
Pad 3
Pad 4
Control voltage
Ground
Output
Supply voltage
Top view
5.08 [0.200]
Rounded pad is pad No. 1. Count counter-clockwise when looking at top view.
Count clockwise when looking at bottom view. 0.01 uF decoupling capacitor is built-in.
Recommended Reflow Soldering Profile
245°C liquidus 221°C solidus solder alloy is used in the assembly of VM57T products.
Do not exceed the reflow conditions given below
Profile A (low temperature solder reflow): For Sn62 Pb36 Ag2 and Sn63 Pb37 alloy.
250
230
200
183
150
100
50
Pre-heat 1
Peak Temperature. Topside temperature of board to be 220°C min; 230°C max.
Liquidus Temperature
Flux Activation
Temperature
Temperature (°C)
t
Time above 183°C
up a
amp
c max.
30~60 sec. max.
Ram
R
4 °C p do w
/ se
2 °C
/ s e n at
cm
a x.
Soaking Zone
Reflow
Pre-heat 2
Zone
Cooling
30
60
90
120
150 180
210
240
270
300
330
Soaking temp: 140°C~180°C
Soaking time: 60~90 sec.
Profile B (high temperature solder reflow): For Sn96.5% Ag 3.5% Cu 0.5% alloy.
250
Temperature (°C)
217
200
150
100
50
Pre-heat 1
Peak Temperature. Topside temperature of board to be 230°C min; 248°C max.
Liquidus Temperature
Flux Activation
Temperature
at
p u p
x.
R a m
s ec m a
/
2 °C
Time above 217°C
30~60 sec. max.
Ram
4 °C p d o w
/ s e n at
cm
a x.
Reflow
Zone
Cooling
Time
(sec)
Soaking Zone
Pre-heat 2
30
60
90
120
150 180
210
240
270
300
330
Soaking temp: 140°C~200°C
Soaking time: 90~120 sec.
MERCURY
Page 3 of 3
Date: May 1, 2008
1.8[0.071]
Time
(sec)
Revision: 4
DSP and ARM Processors
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