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參數(shù)資料
| 型號： | ICS840AM-77 |
| 英文描述： | 77.76MHZ, LVCMOS/LVTTL OSCILLATOR REPLACEMENT |
| 中文描述： | 77.76MHZ，的LVCMOS / LVTTL振蕩器置換 |
| 文件頁數(shù)： | 6/9頁 |
| 文件大?。?/td> | 171K |
| 代理商： | ICS840AM-77 |
840AG-77
www.icst.com/products/hiperclocks.html
REV. A NOVEMBER 7, 2005
6
Integrated
Circuit
Systems, Inc.
ICS840-77
77.76MH
Z
, LVCMOS/LVTTL
O
SCILLATOR
R
EPLACEMENT
PRELIMINARY
A
PPLICATION
I
NFORMATION
Figure 1. C
RYSTAL
I
NPU
t I
NTERFACE
C
RYSTAL
I
NPUT
I
NTERFACE
The ICS840-77 has been characterized with 18pF parallel
resonant crystals. The capacitor values, C1 and C2, shown in
Figure 1
below were determined using a 19.44MHz, 18pF paral-
lel resonant crystal and were chosen to minimize the ppm error.
The optimum C1 and C2 values can be slightly adjusted for
different board layouts.
X1
18pF Parallel Crystal
C1
12p
XTAL_OUT
XTAL_IN
C2
12p
I
NPUTS
:
C
RYSTAL
I
NPUT
:
For applications not requiring the use of the crystal oscillator
input, both XTAL_IN and XTAL_OUT can be left floating. Though
not required, but for additional protection, a 1k
Ω
resistor can be
tied from XTAL_IN to ground.
S
ELECT
P
INS
:
All select pins have internal pull-ups and pull-downs; additional
resistance is not required but can be added for additional
protection. A 1k
Ω
resistor can be used.
R
ECOMMENDATIONS
FOR
U
NUSED
I
NPUT
AND
O
UTPUT
P
INS
O
UTPUTS
:
LVCMOS O
UTPUT
:
All unused LVCMOS output can be left floating. We recommend
that there is no trace attached.
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| ICS840AM-77LF | 制造商:ICS 制造商全稱:ICS 功能描述:77.76MHZ, LVCMOS/LVTTL OSCILLATOR REPLACEMENT |
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| ICS840S05AYILF | 功能描述:IC FREQ SYNTHESIZER 32-TQFP RoHS:是 類別:集成電路 (IC) >> 時鐘/計時 - 時鐘發(fā)生器，PLL，頻率合成器 系列:HiPerClockS™ 標準包裝:1,000 系列:- 類型:時鐘/頻率合成器，扇出分配 PLL:- 輸入:- 輸出:- 電路數(shù):- 比率 - 輸入:輸出:- 差分 - 輸入:輸出:- 頻率 - 最大:- 除法器/乘法器:- 電源電壓:- 工作溫度:- 安裝類型:表面貼裝 封裝/外殼:56-VFQFN 裸露焊盤 供應商設備封裝:56-VFQFP-EP（8x8） 包裝:帶卷 (TR) 其它名稱:844S012AKI-01LFT |
| ICS840S05AYILFT | 功能描述:IC FREQ SYNTHESIZER 32-TQFP RoHS:是 類別:集成電路 (IC) >> 時鐘/計時 - 時鐘發(fā)生器，PLL，頻率合成器 系列:HiPerClockS™ 標準包裝:1,000 系列:- 類型:時鐘/頻率合成器，扇出分配 PLL:- 輸入:- 輸出:- 電路數(shù):- 比率 - 輸入:輸出:- 差分 - 輸入:輸出:- 頻率 - 最大:- 除法器/乘法器:- 電源電壓:- 工作溫度:- 安裝類型:表面貼裝 封裝/外殼:56-VFQFN 裸露焊盤 供應商設備封裝:56-VFQFP-EP（8x8） 包裝:帶卷 (TR) 其它名稱:844S012AKI-01LFT |
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