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參數資料
| 型號： | ICS87949AY-01T |
| 英文描述： | LOW SKEW ±1, ±2 CLOCK GENERATOR |
| 中文描述： | 低偏移± 1，± 2時鐘發生器 |
| 文件頁數： | 1/13頁 |
| 文件大小： | 127K |
| 代理商： | ICS87949AY-01T |
87949AY-01
www.icst.com/products/hiperclocks.html
REV. A JANUARY 2, 2002
1
ICS87949-01
L
OW
S
KEW
÷
1,
÷
2
C
LOCK
G
ENERATOR
PRELIMINARY
G
ENERAL
D
ESCRIPTION
The ICS87949-01 is a low skew, ÷1, ÷2 Clock
Generator and a member of the HiPerClockS
family of High Performance Clock Solutions from
ICS. The ICS87949-01 has selectable single
ended clock or LVPECL clock inputs. The single
ended clock input accepts LVCMOS or LVTTL input levels.
The PCLK, nPCLK pair can accept LVPECL, CML, or SSTL
input levels. The low impedance LVCMOS outputs are de-
signed to drive 50
series or parallel terminated transmis-
sion lines. The effective fanout can be increased from 15 to
30 by utilizing the ability of the outputs to drive two series
terminated lines.
The divide select inputs, DIV_SELx, control the output frequency
of each bank. The outputs can be utilized in the ÷1, ÷2 or a
combination of ÷1 and ÷2 modes. The master reset input, MR/
nOE, resets the internal frequency dividers and also controls
the active and high impedance states of all outputs.
The ICS87949-01 is characterized at 3.3V core/3.3V output and
3.3V core/ 2.5V output. Guaranteed bank, output and part-to-
part skew characteristics make the ICS87949-01 ideal for those
clock distribution applications demanding well defined perfor-
mance and repeatability.
F
EATURES
15 single ended LVCMOS outputs, 7
typical output
impedance
Selectable LVCMOS or LVPECL clock inputs
CLK0 and CLK1 can accept the following input levels:
LVCMOS and LVTTL
PCLK, nPCLK supports the following input types:
LVPECL, CML, SSTL
Maximum input frequency: 250MHz
Output skew: 200ps (maximum)
Part-to-part skew: 500ps (typical)
Multiple frequency skew: 350ps (maximum)
3.3V input, outputs may be either 3.3V or 2.5V supply modes
0°C to 70°C ambient operating temperature
Industrial temperature information available upon request
Functionally compatible to the MPC949 in a smaller footprint
requiring less board space
B
LOCK
D
IAGRAM
P
IN
A
SSIGNMENT
48-Lead LQFP
7mm x 7mm x 1.4mm package body
Y Package
Top View
HiPerClockS
V
D
Q
G
Q
V
D
Q
G
Q
V
D
Q
G
G
MR/nOE
CLK_SEL
V
DD
CLK0
CLK1
PCLK
nPCLK
PCLK_SEL
DIV_SELA
DIV_SELB
DIV_SELC
DIV_SELD
1
2
3
4
5
6
7
8
9
10
11
12
13 14 15 16 17 18 19 20 21 22 23 24
36
35
34
33
32
31
30
29
28
27
26
25
48 47 46 45 44 43 42 41 40 39 38 37
nc
GND
QC0
V
DDC
QC1
GND
QC2
V
DDC
QC3
GND
GND
QD5
V
D
Q
G
Q
V
D
Q
G
G
Q
V
D
Q
G
ICS87949-01
DIV_SELA
DIV_SELB
DIV_SELC
DIV_SELD
MR/nOE
QA0 - QA1
QB0 - QB2
QC0 - QC3
QD0 - QD5
CLK_SEL
CLK0
CLK1
PCLK
nPCLK
PCLK_SEL
0
1
÷
1
÷
2
R
0
1
0
1
0
1
0
1
0
1
The Preliminary Information presented herein represents a product in prototyping or pre-production. The noted characteristics are based on initial
product characterization. Integrated Circuit Systems, Incorporated (ICS) reserves the right to change any circuitry or specifications without notice.
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相關代理商/技術參數 |
參數描述 |
|---|---|
| ICS87949AYI | 制造商:ICS 功能描述: |
| ICS87949AYILF | 功能描述:IC CLK GENERATOR /1 /2 52-LQFP RoHS:是 類別:集成電路 (IC) >> 時鐘/計時 - 時鐘發生器，PLL，頻率合成器 系列:HiPerClockS™ 標準包裝:2,000 系列:- 類型:PLL 頻率合成器 PLL:是 輸入:晶體 輸出:時鐘 電路數:1 比率 - 輸入:輸出:1:1 差分 - 輸入:輸出:無/無 頻率 - 最大:1GHz 除法器/乘法器:是/無 電源電壓:4.5 V ~ 5.5 V 工作溫度:-20°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:16-LSSOP（0.175"，4.40mm 寬） 供應商設備封裝:16-SSOP 包裝:帶卷 (TR) 其它名稱:NJW1504V-TE1-NDNJW1504V-TE1TR |
| ICS87949AYILFT | 功能描述:IC CLOCK GEN LVCMOS 52-LQFP RoHS:是 類別:集成電路 (IC) >> 時鐘/計時 - 時鐘發生器，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:- 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 |
| ICS87950BYILF | 功能描述:IC CLK MULT LVCMOS/LVTTL 32-LQFP RoHS:是 類別:集成電路 (IC) >> 時鐘/計時 - 時鐘發生器，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:- 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 |
| ICS87950BYILFT | 功能描述:IC CLOCK MULT 1-9 32-LQFP RoHS:是 類別:集成電路 (IC) >> 時鐘/計時 - 時鐘發生器，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:- 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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