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參數(shù)資料
| 型號： | SY89424V |
| 廠商： | Micrel Semiconductor,Inc. |
| 英文描述： | 5V/3.3V FREQUENCY SYNTHESIZER 60MHz to 1GHz |
| 中文描述： | 5V/3.3V頻率合成60MHz時至1GHz |
| 文件頁數(shù)： | 1/5頁 |
| 文件大?。?/td> | 75K |
| 代理商： | SY89424V |
The SY89424V is a low-power Phase Locked Loop
(PLL) based frequency synthesizer. The device is capable
of generating up to 1GHz clock frequencies with a low-cost
10–25MHz external series-resonant quartz crystal. One
can also use PECL differential clock signals to drive this
device instead of the quartz crystal. Operation of this chip
is controlled by three select pins (S1, S2 and S3). S1
selects the divide ratio of 24 or 50 for the PLL. S2 and S3
select the output frequency. There are two pull-down
resistor pins (PDR
1
and PDR
2
). Each pin has an on-chip
resistor that will control the output driver currents. When
PDR
1
and PDR
2
pins are open, both outputs are normal
open emitter PECL drivers. When PDR
1
and PDR
2
pins
are shorted to the outputs, on-chip pull down currents of
25mA (40mA at 5V V
CC
) are provided. Both output drivers
are capable of driving 20 ohm clock lines. An output enable
(OE) pin is available and it can be HIGH or left open for
normal operation. When OE is LOW, a built-in Disable
Timing Synchronizer will force the FOUT output to LOW at
the completion of the HIGH clock cycle. The FOUT output
remains HIGH during that time.
5V/3.3V
FREQUENCY SYNTHESIZER
(60MHz to 1GHz)
BLOCK DIAGRAM
ClockWorks
SY89424V
I
3.3V and 5V power supply options
I
Up to 1GHz clock frequencies
I
Internal quartz reference oscillator driven by quartz
crystal or PECL source
I
Low jitter PLL design
I
On-chip 20 ohm driver
I
Differential outputs with 600mV (min) swing
I
Optional pull-down resistors for AC-coupled outputs
I
Low power consumption
I
External loop filter optimizes performance/cost
I
Available in 16-pin SOIC package
FEATURES
DESCRIPTION
FOUT
FOUT
XTAL1
LOOP
FILTER
S1A
XTAL2
OSC
PHASE
COMP
CHARGE
PUMP
÷
24,
÷
50
VCO
S2A
S3A
÷
1, 2, 3, 4
OE
PDR1 PDR2
F1A F2A
1
Rev.: G
Issue Date:
Amendment: /0
May, 1998
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SY89425JC | DUAL SONET OC-12 CLOCK SYNTHESIZER |
| SY89425 | Dual Sonet OC-12 Clock Synthesizer(雙鎖相環(huán)時鐘合成器（由兩個Sonet兼容時鐘發(fā)生器組成）) |
| SY89425JCTR | DUAL SONET OC-12 CLOCK SYNTHESIZER |
| SY89473UMG | Precision LVPECL 2:1 Multiplexer with 1:2 Fanout and Internal Termination |
| SY89473U | Precision LVPECL 2:1 Multiplexer with 1:2 Fanout and Internal Termination |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SY89424VZC | 制造商:Micrel Inc 功能描述:IC, PHASE LOCK LOOP, 1GHZ, W16-SOIC, PLL Type:Frequency Synthesis, Frequency:1GH |
| SY89424VZCTR | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:5V/3.3V FREQUENCY SYNTHESIZER 60MHz to 1GHz |
| SY89425 | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:DUAL SONET OC-12 CLOCK SYNTHESIZER |
| SY89425JC | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:DUAL SONET OC-12 CLOCK SYNTHESIZER |
| SY89425JCTR | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:DUAL SONET OC-12 CLOCK SYNTHESIZER |
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