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參數(shù)資料
| 型號： | SY89426JITR |
| 廠商： | MICREL INC |
| 元件分類： | 數(shù)字傳輸電路 |
| 英文描述： | SONET OC-12/OC-3 CLOCK SYNTHESIZER |
| 中文描述： | ATM/SONET/SDH SUPPORT CIRCUIT, PQCC28 |
| 封裝： | PLASTIC, LCC-28 |
| 文件頁數(shù)： | 2/6頁 |
| 文件大小： | 90K |
| 代理商： | SY89426JITR |
2
ClockWorks
SY89426
Micrel
FUNCTIONAL BLOCK DIAGRAM
INPUTS
RFCK [Reference Clock]
TTL
Reference clock IN. (38.88, 51.84 or 77.76MHz).
SEL39 [38.88MHz Select]
TTL
Logic HIGH on this pin denotes a 38.88MHz input reference
clock. Tie to logic LOW if input is not 38.88MHz.
SEL78 [77.76MHz Select]
TTL
Logic HIGH on this pin denotes a 77.76MHz input reference
clock. Tie to logic LOW if input is not 77.76MHz.
RST [Reset]
TTL
Tie to logic LOW for normal operation; logic HIGH forces reset
of internal Phase Detector & feedback dividers.
FLTRP, FLTRN [Loop Filter, Pos & Neg]
Analog
Connect a series RC loop filter between these pins. The
suggested RC values are 500
and 0.1
μ
F, as shown in the
Typical Application.
DISC [Disable Clock]
TTL
Logic HIGH on this pin disables the Retimed Reference Clock
output RETRFCK); if this output is not required, it is
recommended that it be disabled to reduce switching noise. A
logic LOW enables the output.
PIN DESCRIPTION
OUTPUTS
CK622P, CK622N [622 Clock Output]
Differential PECL.
622.08MHz output clock from PLL B.
CK155 [155 Clock Out]
Single-ended PECL
155.52MHz output clock.
RETRFCK [Retimed Reference Clock Out]
TTL
An output clock with the same frequency as the input Reference
Clock (RFCK) and a 45-55% duty cycle. This output is derived
by dividing the 622.08MHz output by the appropriate factor
(e.g., divide by 16 for a 38.88MHz inout reference; divide by
12 for 51.84Mhz in; or divide by 8 for 77.76MHz in).
POWER & GROUND
V
CC
V
CCO
GND
+5V for internal circuits.
+5V for PECL outputs.
Ground (0 volts).
FLTRP/N
V
CCO
5
7
RFCK
(TTL)
SEL39
(TTL)
SEL78
(TTL)
RST
(TTL)
CK622P
(PECL)
CK622N
CK155
(PECL)
RETRFCK
(TTL)
DISC
(TTL)
Φ
/f
CHG
PUMP
622MHz
VCO
FEEDBACK
÷
2/3/4
DIVIDER
÷
4
V
CCA
GND
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| SY89429AJC | PROGRAMMABLE FREQUENCY SYNTHESIZER 25MHz to 400MHz |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SY89426JY | 功能描述:時鐘合成器/抖動清除器 SONET OC-12/OC-3 Clock Synthesizer (I Temp, Lead Free) RoHS:否 制造商:Skyworks Solutions, Inc. 輸出端數(shù)量: 輸出電平: 最大輸出頻率: 輸入電平: 最大輸入頻率:6.1 GHz 電源電壓-最大:3.3 V 電源電壓-最小:2.7 V 封裝 / 箱體:TSSOP-28 封裝:Reel |
| SY89426JY TR | 功能描述:時鐘合成器/抖動清除器 SONET OC-12/OC-3 Clock Synthesizer (I Temp, Lead Free) RoHS:否 制造商:Skyworks Solutions, Inc. 輸出端數(shù)量: 輸出電平: 最大輸出頻率: 輸入電平: 最大輸入頻率:6.1 GHz 電源電壓-最大:3.3 V 電源電壓-最小:2.7 V 封裝 / 箱體:TSSOP-28 封裝:Reel |
| SY89426JYTR | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:SONET OC-12/OC-3 CLOCK SYNTHESIZER |
| SY89429 | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:5V/3.3V PROGRAMMABLE FREQUENCY SYNTHESIZER 25MHz to 400MHz |
| SY89429A | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:PROGRAMMABLE FREQUENCY SYNTHESIZER 25MHz to 400MHz |
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