Voltage Controlled Temperature Compensated Crystal Oscillators
VCTCXO, VM572T Series, CMOS Output, 32.768 KHz
Features:
Suitable for non-battery operated real time clocks
require 32.768 KHz reference frequency
5x7x2.3 mm ceramic SMD VCTCXOs with
CMOS square wave output
RoHS compliant
MERCURY
Since 1973
General Specifications
(at+25°C and specified input voltage)
Product Series
Frequency
Output Wave From
Initial Calibration Tolerance
(1)
Frequency Stability (ppm)
Temperature
Range
Standard
-10 to +60°C
-20 to +70°C
-30 to +75°C
-40 to +85°C
VM572T
32.768 KHz
Square
wave. Wave form code is “T”
±2 ppm at +25°C and Vcon = +1.5 V D.C.
± 1 ppm
±1.5 ppm
±2.0 ppm
√
√
√
√
√
√
√
√
√
√
√
±2.5 ppm
√
√
√
√
√: Available
:
Call us
:
Not
available
Frequency Stability
vs Aging
vs Voltage Change
vs Load Change
vs reflow
Supply Voltage (V
DD
)
Output Voltage Level
Vdd=3.0V
Logic “1”
Logic “0”
±1.0 ppm max. first year at +25°C
±0.3 ppm max. for a ±5% input voltage change
±0.3 ppm max. for a ±10% loading condition change
±1 ppm max. 1 reflow and measured 24 hours afterwards
+2.8 V
+3.0 V
+3.3 V
(voltage code is
(voltage code is
(voltage code is
“28”)
“3”)
“33”)
2.7 V min.
0.3 V max.
3 nano. sec. typ. 20%
80% of waveform
50%±10% measured at 50% waveform
+5.0 V
(voltage code is
“5”)
Rise Time and Fall Time
Duty Cycle (Symmetry)
Start-up Time
2 m. sec. typ.
Current Consumption
3.5 mA typ. at + 3.3V / 7 mA typ. at +5.0V
Frequency
Electronic
±10 ppm typical with Vcontrol centered at = +1.5 V and Vcontrol range of ±1.0 V
Deviation Range
Frequency Tuning
Slope Polarity
Positive:
Positive voltage for positive frequency shift
on pad 1.
(VCTCXO only)
Linearity
±10
% max.
Output Load
15 pF
Offset
10 Hz
100 Hz
1 kHz
10 kHz
100 kHz
SSB Phase Noise at +25°C
Typical
-65 dBc/Hz
-100 dBc/Hz
-130 dBc/Hz
-150 dBc/Hz
-150 dBc/Hz
Storage Temperature
-50°C to +100°C
(1)
:
Frequency stability over temperature will be from this measured initial frequency.
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: June 21, 2010
Rev. 2
MERCURY www.mercury-crystal.com
Voltage Controlled Temperature Compensated Crystal Oscillators
VCTCXO, VM572T Series, CMOS Output, 32.768 KHz
Part Number Format and Example:
Part number example:
VM572T
3
—
VM572T3-32.768K-2.5/-30+75
32.768K
—
2.5
∕
=
Please specify
-30+75
MERCURY
Since 1973
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 KHz
: Frequency stability
: Operating Temperature range in °C
Environment Performance Specifications
Green Requirement
Moisture Sensitivity Level
Humidity
Hermeticity
Solderability
Vibration
Shock
Storage temp. range
ESD Protection
Solder Pad Surface Finish
RoHS compliant, Pb (lead) free
MSL=1 per IPC/JEDEC J-STD-020D.1
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
2.5 KV min. Human body model.
Gold (0.3~1.2 um) over nickel (1.27~8.89um)
Package Dimensions and Suggested Land Pattern:
[0.275± 0.006]
7.00± 0.15
4
3
Unit: mm
[0.024]
0.6
[0.055]
1.4
4
1
5.00±0.15
[0.197± 0.006]
[0.046]
1.17
3
2
Bottom
view
R0
.7
2.3 max.
[0.090 max.]
[0.027]
0.7
0.4
[0.015]
[0.004]
0.1
1
Top view
2
5.08 [0.200]
typical
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. Decoupling capacitor is not built-in.
MERCURY
Page 2 of 3
Date: June 21, 2010
Rev. 2
1.8[0.071]
Voltage Controlled Temperature Compensated Crystal Oscillators
VCTCXO, VM572T Series, CMOS Output, 32.768 KHz
CMOS Square Wave VCTCXO Test Circuit and Waveform:
MERCURY
Since 1973
Clock Out
A
+ +
- V
-
4
0.01uF
T2
T1
80%
50%
3
15
pF *
1
+
-
2 * Include all the
20%
probe and stray
capacitances
Tr
Tf Duty Cycle = T1 *100%
T2
Recommended Reflow Soldering Profile
Profile Feature
Preheat/Soak
- Temperature min. (Ts min.)
- Temperature max. (Ts max.)
- Time (ts) (Ts min. to Ts max.)
Ramp-up rate (T
L
to Tp)
Liquidous temperature (T
L
)
Time (t
L
) maintained above T
L
Peak package body temperature (Tp)
Time (Tp) within 5⁰C of the classification
temperature Tc
Ramp-down rate (Tp to T
L
)
Time 25⁰C to peak temperature
Sn-Pb Eutectic Assembly
100⁰C
150⁰C
60 to 120 seconds
3⁰C / sec. max.
183⁰C
60 to 150 seconds
235⁰C
10 to 30 seconds
6⁰C / second max.
6 minutes max.
Pb-free Assembly
150⁰C
200⁰C
60 to 180 seconds
3⁰C / sec. max.
217⁰C
60 to 150 seconds
260⁰C
20 to 40 seconds
6⁰C / second max.
8 minutes max.
MERCURY
Page 3 of 3
Date: June 21, 2010
Rev. 2
电源技术
