參數(shù)資料
型號: LTC6904CMS8
廠商: LINEAR TECHNOLOGY CORP
元件分類: XO, clock
英文描述: 1kHz - 68MHz Serial Port Programmable Oscillator
中文描述: CRYSTAL OSCILLATOR, CLOCK, 0.001039 MHz - 68 MHz, CMOS OUTPUT
封裝: PLASTIC, MSOP-8
文件頁數(shù): 5/12頁
文件大?。?/td> 195K
代理商: LTC6904CMS8
LTC6903/LTC6904
5
69034fa
PIU
GND (Pin 1):
Negative Power Supply (Ground). Should be
tied directly to a ground plane for best performance.
SDI ( Pin 2 ):
Serial Data Input. Data for serial transfer is
presented on this pin.
SCK (Pin 3):
Serial Port Clock. Input, positive edge trig-
gered. Clocks serial data in on rising edge.
SEN (Pin 4):
Serial Port Enable (6903 Only). Input, active
LOW. Initiates serial transaction when brought LOW,
finalizes transaction when brought HIGH after 16 clocks.
ADR (Pin 4):
Serial Port Address (6904 Only). Sets the I
2
C
serial port address.
CLK (Pin 5):
Auxiliary Clock Output. Frequency set by
serial port.
CLK (Pin 6):
Main Clock Output. Frequency set by serial
port.
OE (Pin 7):
Asynchronous Output Enable. CLK and CLK are
set LOW when this pin is LOW.
V
+
(Pin 8):
Positive Power Supply. This supply must be
kept free from noise and ripple. It should be bypassed
directly to a ground plane with a quality 0.1
μ
F capacitor.
Additional bypass may be necessary for operation at high
frequency or under larger loads.
TYPICAL PERFOR U
Output Waveform at 68MHz
Output Waveform at 20MHz
Output Spectrum at 20MHz
3468 G08
5ns/DIV
3468 G09
10ns/DIV
0
0
C
L
= 10pF
V
+
= 3V
C
L
= 10pF
V
+
= 3V
15MHz
25MHz
1
6903 G07
20
0
–80
20MHz
Peak-to-Peak Jitter vs Frequency
Supply Current vs Output
Frequency
Output Resistance vs Supply
Voltage
FREQUENCY (MHz)
0.001
0.01
0.1
1
10
100
S
6903 G05
10
8
9
7
5
3
6
4
2
1
0
V
+
= 3V
V
+
= 5V
SUPPLY VOLTAGE (V)
3.5
4.5
2.5
3.0
4.0
5.0
5.5
O
)
6903 G06
60
50
40
30
20
10
0
FREQUENCY (MHz)
0.1
1
10
100
P
6903 G04
10
1
0.1
0.01
V
+
= 3V
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