Voltage Controlled Temperature Compensated Crystal
Oscillators VCVCTCXO, VM57T Series, CMOS Output
MERCURY
Since 1973
at +25°C
(dBc/Hz)
VM57T33-10.000
(see plot below)
VM57T33-155.520
-93
-62
-117
-88
-137
-111
-144
-121
-144
-116
-151
-107
-152
-122
(1): Frequency stability over temperature will be from this measured initial frequency.
VM57T33-10.000
V control= 1.5 V
Part Number Format and Example:
Part number example:
VM57T3-20.000-2.5/-30+75
"= Please specify
"
"
"
"
VM57T
n
3
o
—
20.000
p
—
2.5
q
⁄
-30+75
r
n: Product Series
o: Voltage code; Use”28” for +2.8 V; use “3” for +3.0 V; use “33” for +3.3 V;
use “5” for +5.0 V p: Frequency in MHz q: Frequency stability r: Operating Temperature range in °C
CMOS Square Wave VCTCXO Test Circuit:
T2
Clock Out
T1
A
4
1
3
2
15
pF *
VM57T
M E C
80%
50%
20%
+
-
+
-
V
* Include all the
probe and stray
capacitances
+
-
T1
T2
Tf
*100%
Tr
Duty Cycle =
Environment Performance Specifications
Green Requirement
MSL Level
Humidity
Hermeticity
Solderability
Vibration
RoHS compliant, Pb (lead) free
MSL 1 per IPC/JEDEC-STD-020C
85% RH, 85°C, 48 hours
Leak rate 2x10-8 ATM-cm3/sec max. Crystal part only.
MIL-STD-202F method 208E
MIL-STD-202F method 204, 35G, 50 to 2000 Hz
Shock
Storage temp. range
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
MERCURY [ MERCURY UNITED ELECTRONICS INC ]
