T C X O – Ultra Low Current
“M57K” SERIES 5x7 mm
Logic: HCMOS
Wave Form: Square Wave
MERCURY
Since 1973
With M57K design engineers enjoy the benefits of HCMOS output,
TCXO stability, ultra low current and miniaturized 5x7 packaging.
M57K consumes less than 4 mA at 26 MHz +3.3 V with low phase
noise of -130 dBc / Hz at 1 KHz offset. M57K also features Tri-state
option on pad 1. Oscillator can be tuned off by grounding the pad 1 to
further reduce the power.
General Specifications
Frequency Range
Output Wave From
Initial Calibration Tolerance
Standard Frequencies
Frequency Stability
vs Temperature
vs Aging
vs Supply Voltage Change
vs Load Change
vs reflow (SMD models)
Typical Operating Temperature
Range (examples)
Input Voltage Range (V
DD
)
Logic High “1”
Logic Low “0”
12.8 MHz
13.0 MHz
14.4 MHz
Current Consumption
16.384 MHz
mA, typical
19.200 MHz
19.440 MHz
20.000 MHz
26.000 MHz
Rise Time and Fall Time
Duty Cycle (Symmetry)
Start-up Time
Output Load
Fanout (Drive Capability)
Pad 1 Options
SSB Phase
Offset
Output Voltage
Levels
T
A
=+25°C, V
DD
at specified voltage, load
15 pF
12.8 MHz ~ 26.0 MHz
PRELIMINARY
CMOS Square
wave.
±2 ppm at +25°C±2°C
12.8, 13.0, 14.4, 15.36, 16.0, 16.384, 16.8, 19.2, 19.44, 19.68, 20.0 and
26.0 MHz (partial list)
±1 ppm , ±1.5 ppm, ±2.0 ppm, ±2.5 ppm, ±3 ppm, ±5 ppm, or ±10 ppm over
specified operating temperature range
±1.0 ppm max. first year at +25°C
±1.0 ppm max. for a ±10% input voltage change
±0.3 ppm max. for a ±10% loading condition change
±1 ppm max. 1 reflow and measured 24 hours afterwards
0°C to +60°C
0°C to +70°C
-10°C to +60°C
-20 °C to +70°C
-30°C to +60°C
-30°C to +75°C or custom
±5 ppm stability for -40°C to +85°C is also available
+2.8 V
+3.0 V
+3.3 V
(voltage code is “3”)
(voltage code is “3”)
(voltage code is “33”)
1.9 V min.; 2.3 V typical
2.1 V min.; 2.6 V typical
2.4 V min.; 2.9 V typical
0.27 V typical; 0.34V max. 0.29 V typical; 0.36V max. 0.32 V typical; 0.4 V max.
2.3 mA typical
2.4 mA typical
2.6 mA typical
2.5 mA typical
2.6 mA typical
2.8 mA typical
2.6 mA typical
2.8 mA typical
3.1 mA typical
2.8 mA typical
3.0 mA typical
3.2 mA typical
3.2 mA typical
3.3 mA typical
3.6 mA typical
3.2 mA typical
3.4 mA typical
3.7 mA typical
3.2 mA typical
3.4 mA typical
3.7 mA typical
3.6 mA typical
3.8 mA typical
4.1 mA typical
4 n sec. typical. 0.3 V
↔
3.0 V with 15 pF load
50%±5% measured at 1.4 V
10 m. sec. max.
15 pF
12 mA typical 17 mA max. (at TTL level)
When connected to ground: Output is disabled (oscillator is off).
When no connection or connected to logic high: TCXO output
Disable time is 10 m sec. typical.
Enable time (when ground is removed from pad 1) is 10 m sec. typical.
100 Hz
1 KHz
10 kHz
100 kHz
1 MHz
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: Jan. 23, 2005
Rev. 0
MERCURY
www.mercury-crystal.com
V C T C X O – Ultra Low Current
Logic: HCMOS
“M57K” SERIES 5x7 mm
Wave Form: Square Wave
Noise
M57K3-13.000
at +25°C
RMS Period Jitter
Packaging
(1)
MERCURY
Since 1973
-80 dBc/Hz
-110 dBc/Hz
-130 dBc/Hz
-135 dBc/Hz
-142 dBc/Hz
3 ps max. (1 sigma, 1000 samples; with capacitive coupling between V
DD
and gnd)
16 mm tape; 8 mm pitch; 1000 pcs per reel.
Inclusive of 25°C tolerance, operating temperature range, ±10% input voltage variation, load change, aging, shock and vibration.
Part Number Format and Example
= Please specify
Example:
M57K3-20.000-2.5/-30+75
Explanation:
Ultra low current VCTCXO 20.000 MHz; +3.0 V supply voltage; ±2.5 ppm over -30°C to +75°C frequency stability.
With Tri-state option on pad 1.
M57K
3
—
20.000 —
2.5
⁄
-30+75
: Frequency in MHz;
: Product series; : Voltage codes: “28” for +2.8V; “3” for +3.3 V; “33” for +3.3 V
: Frequency stability in ppm;
O
perating temperature range in
°C
M57K Package Dimensions and Recommended Pad Layout:
[0.275±0.006]
7.00±0.15
[0.024]
0.6
[0.049]
1.25
3
2
4
1
unit mm[inches]
[0.055]
1.4
4
[0.197±0.006]
5.00±0.15
3
M57K_
MEC
1
2
2.5±0.2
[0.098±0.008]
R0
.7
0.55 [0.022]
5.08 [0.200]
typical
bottom view
2.2[0.086]
Pad 2
Pad 3
Pad 4
5.08 [0.200]
Chamfered 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 built-in
MERCURY
Page 2 of 3
Date: Feb. 6, 2002
1.8[0.071]
Rev. 1
Pad 1
This pad must be
left floating
Ground
Output
Supply voltage
2.0[0.079]
[0.004]
0.1
V C T C X O – Ultra Low Current
Logic: HCMOS
“M57K” SERIES 5x7 mm
Wave Form: Square Wave
Environment Performance Specifications
RoHS Compliance
Storage temp. range
Humidity
Hermetic seal
Solderability
Reflow
Vibration
Shock
Pb (lead) free
-55 to +125°C
85% RH, 85°C, 48 hours
Leak rate 2x10
-8
ATM-cm
3
/sec max.
MIL-STD-202F method 208E
260°C for 10 sec.
MIL-STD-202F method 204, 35G, 50 to 2000 Hz
MIL-STD-202F method 213B, test condi. E, 1000GG ½ sine wave
MERCURY
Since 1973
RECOMMENDED REFLOW SOLDERING PROFILE
MERCURY
Page 3 of 3
Date: Jan. 23, 2005
Rev. 0
