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| 型号： | SC3048B |
| 厂商： | RFM |
| 文件页数： | 1/2页 |
| 文件大小： | 0K |
| 描述： | MOD SAW FREQ CTRL 444MHZ SMC-8 |
| 标准包装： | 200 |
| 系列： | SC |
| 类型： | SO（SAW） |
| 频率： | 444MHz |
| 功能： | 三态（输出启用） |
| 输出： | 正弦波 |
| 电源电压： | 3.3V |
| 频率稳定性： | ±200ppm |
| 工作温度： | 0°C ~ 70°C |
| 电流 - 电源（最大）： | 40mA |
| 安装类型： | 表面贴装 |
| 尺寸/尺寸： | 0.530" L x 0.360" W（13.46mm x 9.14mm） |
| 高度： | 0.081"（2.05mm） |
| 封装/外壳： | 8-SMD |
| 包装： | 带卷 (TR) |
?
SC3048B
?
Quartz SAW Frequency Stability
?
?
?
?
?
Fundamental Fixed Frequency
Excellent Jitter and Symmetry
Rugged, Miniature, Surface-Mount Case
Low-Voltage Power Supply (3.3 VDC)
Directive 2002/95/EC (ROHS) Compliant by June, 2006
444.0 MHz
Differential
Sine-Wave
Clock
This digital clock is designed for use in critical timing applications. Fundamental-mode oscillation is made pos-
sible by surface-acoustic-wave (SAW) technology. The design results in low jitter, compact size, and low pow-
er consumption. Differential outputs provide a sine wave that is made to drive 50 ? loads.
Absolute Maximum Rating
Power Supply Voltage (V CC at Terminal 1)
Input Voltage (ENABLE at Terminal 8)
Value
0 to +4.0
0 to +4.0
Units
VDC
VDC
Case Temperature (Powered or Storage)
-40 to +85
°C
SMC-8 Case
Electrical Characteristics
Characteristic
Sym
Notes
Minimum
Typical
Maximum
Units
Output Frequency
Q and Q Output
Absolute Frequency
Tolerance from 444.000 MHz
Voltage into 50 ? (VSWR ≤ 1.2)
Operating Load VSWR
Symmetry
f O
? f O
V O
1, 2
1, 3
3, 4, 5
443.911
0.5
49
444.089
±200
4.5
2:1
51
MHz
ppm
dBm
%
Harmonic Spurious
Nonharmonic Spurious
3, 4, 6
-30
-60
dBc
dBc
Q and Q Period Jitter
Output (Disabled)
No Noise on V CC
200 mV P-P from 1 MHz to ? f O on
Amplitude into 50 ?
3, 4, 6, 7
3, 4, 7, 8
3, 9
15
30
35
75
ps P-P
ps P-P
mV P-P
Output DC Resistance (between Q & Q)
3
100
K ?
ENABLE (Terminal 14)
Input HIGH Voltage
Input LOW Voltage
Input HIGH Current
V IH
V IL
I IH
3, 9
V CC -0.1
0.0
V CC
3
V CC +0.1
0.20
5
V
V
mA
Input LOW Current
Propagation Delay
I IL
t PD
-1
1
mA
ms
DC Power Supply
Operating Voltage
Operating Current
V CC
I CC
1, 3
+3.13
+3.30
18
+3.47
40
VDC
mA
Operating Ambient Temperature
T A
1, 3
0
+70
°C
Lid Symbolization (YY = Year, WW = Week)
RFM SC3048B 444.00 MHz YYWW
CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.
NOTES:
1.
2.
3.
4.
5.
Unless otherwise noted, all specifications include any combination of load
VSWR, VCC, and TA. In addition, Q and Q are terminated into 50 ? loads to
ground. (See: Typical Test Circuit.)
One or more of the following United States patents apply: 4,616,197; 4,670,681;
4,760,352.
The design, manufacturing process, and specifications of this device are subject
to change without notice.
Only under the nominal conditions of 50 ? load impedance with VSWR ≤ 1.2 and
nominal power supply voltage.
Symmetry is defined as the pulse width (in percent of total period) measured at
the 50% points of Q or Q. (See: Timing Definitions.)
6.
7.
8.
9.
Jitter and other spurious outputs induced by externally generated electrical noise
on V CC or mechanical vibration are not included. Dedicated external voltage
regulation and careful PCB layout are recommended for optimum performance.
Applies to period jitter of Q and Q. Measurements are made with the Tektronix
CSA803 signal analyzer with at least 1000 samples.
Period jitter measured with a 200 mV P-P sine wave swept from 1 MHz to one-half
of f O at the V CC power supply terminal.
The outputs are enabled when Terminal 8 is at logic HIGH. Propagation delay is
defined as the time from the 50% point on the rising edge of ENABLE to the 90%
point on the rising edge of the output amplitude or as the fall time from the 50%
point to the 10% point. (SEE: Timing Definitions.)
RF Monolithics, Inc.
RFM Europe
Phone: (972) 233-2903
Phone: 44 1963 251383
Fax: (972) 387-9148
Fax: 44 1963 251510
E-mail: info@rfm.com
http://www.rfm.com
Page 1 of 2
?1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc.
SC3048B-022806
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