♦
Stability to ±25 PPM
♦+3.3Vdc
or +5.0Vdc Operation
♦HCMOS
Output
♦Operating
Temperature to –40°C to +85°C
♦Output
Enable
♦Tape
& Reel
Model 357
5x7mm Low Cost
Surface Mount VCXO
Electrical Characteristics
Parameter
Supply Voltage
Model 357S
Model 357L
Operating Supply Current
Model 357S
Model 357L
Output Voltage Levels
Model 357S
Logic '1' Level
Logic '0' Level
Model 357L
Logic '1' Level
Logic '0' Level
Output Transition Times
Rise Time
Fall Time
Start Up Time
Output Duty Cycle
(@ 50% Level)
Phase Jitter
(Bandwidth 12K – 20M Hz)
Output Clock Frequency
Model 357S
Model 357L
Control Voltage
Model 357S
Model 357L
Absolute Pull Range
(Note 1)
Model 357L, 357S
(See Ordering Information)
(
Load = 15 pF)
Symbol
V
CC
4.5
2.97
I
CC
-
-
-
-
40
50
mA
mA
5.0
3.3
5.5
3.63
V
V
Min
Typical
Max
Unit
V
OH
V
OL
V
OH
V
OL
T
R
T
F
-
SYM
-
f
O
0.9 * Vcc
-
0.9 * Vcc
-
-
-
-
45
-
1.5
1.5
-
-
-
-
-
-
-
-
<1
-
-
2.5
1.65
-
-
Positive
-
-
-
0.1 * Vcc
-
0.1 * Vcc
V
V
V
V
nS
nS
mS
%
pS RMS
MHz
MHz
V
V
± PPM
%
-
KOhms
KHz
5.0
5.0
10.0
55
-
45
45
4.5
3.0
-
10
-
-
-
V
C
0.5
0.3
-
L
-
Z
C
-
32,50,80 or
100
-
-
50
10
Linearity
Transfer Function
Input Impedance
Modulation Roll-off
(@ -3dB)
Notes
1. Minimum guaranteed (voltage controlled) frequency shift over all conditions (temperature, aging, power supply and
load) for the required lifetime at the average effective ambient operating temperature.
CTS Frequency Products / 171 Covington Drive / Bloomingdale, IL 60108
Phone: 630-924-3500 Fax: 630-924-6610
Rev. X6
Model 357
5x7mm Low Cost
Surface Mount VCXO
MECHANICAL SPECIFICATIONS
Suggested Pad Geometry
Dimensions in Inches [MM]
.100 [2.54]
.071 [1.80]
CTS ** YYWW
357LAC
•
38M8800
.079 [2.00]
.173 [4.40]
.079 [2.00]
.200 [5.08]
** Manufacturing Site Code.
Frequency shall be marked
With 4 significant digits to the
Right if the “M”.
Pin
1
2
3
4
5
6
Symbol
VC
EOH
GND
Output
N.C.
Vcc
Functional Description
Control Voltage
Tri-State Enable
Circuit and Package Ground
RF Output
Not Connected Internally
Supply Voltage
Enable Truth Table
Pin 2
“1”
“0”
Open
Pin 4
Output
High Imp.
Output
ENVIRONMENTAL SPECIFICATIONS
§
§
§
§
§
§
§
§
§
Storage Temperature:
Temperature Cycle:
Mechanical Shock:
Sinusoidal Vibration:
Gross Leak:
Fine Leak:
Resistance to Soldering Heat:
High Temperature Operating Bias:
Frequency Aging:
-55°C to +125°C
400 cycles, -55°C to +125°C, 10 min dwell, 1 min
transfer
1,500g’s, 0.5mS, ½ sinewave, 3 shocks each
direction, in 3 planes
0.06” D.A., 10 to 55 Hz and 20g’s, 55 to 2,000 Hz,
3 cycles per plane
No leak shall appear while immersed in an FC40 or
equivalent liquid at 125°C for 20 seconds
-8
Mass spectrometer leak rates less than 2x10
cc/sec air equivalent
Product must survive 3 reflows of 260°C peak, 10 seconds
maximum
2,000 hours at 125°C, disregarding frequency shift
< 5 ppm shift in 1,000 hours at 85°C
ORDERING INFORMATION
357
- ___M________
Example: 357LAC – 38M8800
Frequency in MHz
M – Indicates decimal point.
Frequency shall be recorded
with 4 significant digits minimum
to the right of the “M”.
Supply Voltage
L = +3.3Vdc
S = +5.0Vdc
Absolute Pull Range
A = ±32 PPM
B = ±50 PPM
C = ±80 PPM
D = ±100 PPM
Operating Temperature Range
C = 0°C to +70°C
I = -40°C to +85°C
CTS Frequency Products / 171 Covington Drive / Bloomingdale, IL 60108
Phone: 630-924-3500 Fax: 630-924-6610
Rev. X6
Microcontroller MCU
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