參數(shù)資料
型號(hào)： ICS84326AMT
英文描述： CRYSTAL-TO-3.3V LVPECL SERIAL ATTACHED SCSI CLOCK SYNTHESIZER/FANOUT BUFFER
中文描述： 水晶到3.3的LVPECL串行連接SCSI時(shí)鐘合成器/扇出緩沖器
文件頁(yè)數(shù)： 7/15頁(yè)
文件大小： 171K
代理商： ICS84326AMT
84326AM
www.icst.com/products/hiperclocks.html
REV. A MARCH 10, 2003
7
ICS84326
C
RYSTAL
-
TO
-3.3V LVPECL
S
ERIAL
A
TTACHED
SCSI C
LOCK
S
YNTHESIZER
/F
ANOUT
B
UFFER
PRELIMINARY
As in any high speed analog circuitry, the power supply pins
are vulnerable to random noise. The ICS84326 provides sepa-
rate power supplies to isolate any high switching
noise from the outputs to the internal PLL. V
, V
and V
should be individually connected to the power supply plane
through vias, and bypass capacitors should be used for each
pin. To achieve optimum jitter performance, power supply iso-
lation is required. Figure 1 llustrates how a 20
resistor along
with a 10
μ
F and a .01
μ
F bypass capacitor should be con-
nected to each V
CCA
pin.
P
OWER
S
UPPLY
F
ILTERING
T
ECHNIQUES
F
IGURE
1. P
OWER
S
UPPLY
F
ILTERING
20
V
CCA
10
μ
F
.01
μ
F
3.3V
.01
μ
F
V
CC
A
PPLICATION
I
NFORMATION
T
ERMINATION
FOR
3.3V LVPECL O
UTPUTS
The clock layout topology shown below is a typical termina-
tion for 3.3V LVPECL outputs. The two different layouts
mentioned are recommended only as guidelines.
FOUT and nFOUT are low impedance follower outputs that
generate ECL/LVPECL compatible outputs. Therefore, termi-
nating resistors (DC current path to ground) or current
sources must be used for functionality. These outputs are
F
IGURE
2B. LVPECL O
UTPUT
T
ERMINATION
3.3V
F
OUT
F
IN
5
2Z
o
Z
o
5
2
Z
o
3
2
Z
o
3
2
Z
o
= 50
Z
o
= 50
F
IGURE
2A. LVPECL O
UTPUT
T
ERMINATION
RTT =
1
(V
OH
+ V
OL
/ V
CC
–
2)
–
2
Z
o
Z
o
= 50
Z
o
= 50
50
50
RTT
V
CC
- 2V
F
IN
F
OUT
designed to drive 50
transmission lines. Matched impedance
techniques should be used to maximize operating
frequency and minimize signal distortion. Figures 2A and 2B
show two different layouts which are recommended only
as guidelines. Other suitable clock layouts may exist and it
would be recommended that the board designers simulate to
guarantee compatibility across all printed circuit and clock
component process variations.
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參數(shù)描述
ICS84327 制造商:ICS 制造商全稱:ICS 功能描述:CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER W/INTEGRATED FANOUT BUFFER
ICS84327AM 制造商:ICS 制造商全稱:ICS 功能描述:CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER W/INTEGRATED FANOUT BUFFER
ICS84327AMLF 功能描述:IC SYNTHESIZER LVPECL 24SOIC RoHS:是 類別:集成電路 (IC) >> 時(shí)鐘/計(jì)時(shí) - 專用 系列:HiPerClockS™ 標(biāo)準(zhǔn)包裝:1,500 系列:- 類型:時(shí)鐘緩沖器/驅(qū)動(dòng)器 PLL:是 主要目的:- 輸入:- 輸出:- 電路數(shù):- 比率 - 輸入:輸出:- 差分 - 輸入:輸出:- 頻率 - 最大:- 電源電壓:3.3V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:28-SSOP（0.209"，5.30mm 寬） 供應(yīng)商設(shè)備封裝:28-SSOP 包裝:帶卷 (TR) 其它名稱:93786AFT
ICS84327AMLFT 功能描述:IC SYNTHESIZER LVPECL 24SOIC RoHS:是 類別:集成電路 (IC) >> 時(shí)鐘/計(jì)時(shí) - 專用 系列:HiPerClockS™ 標(biāo)準(zhǔn)包裝:1,500 系列:- 類型:時(shí)鐘緩沖器/驅(qū)動(dòng)器 PLL:是 主要目的:- 輸入:- 輸出:- 電路數(shù):- 比率 - 輸入:輸出:- 差分 - 輸入:輸出:- 頻率 - 最大:- 電源電壓:3.3V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:28-SSOP（0.209"，5.30mm 寬） 供應(yīng)商設(shè)備封裝:28-SSOP 包裝:帶卷 (TR) 其它名稱:93786AFT
ICS84327AMT 制造商:ICS 制造商全稱:ICS 功能描述:CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER W/INTEGRATED FANOUT BUFFER
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