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参数资料
| 型号： | ICS87949AY-01LF |
| 元件分类： | 时钟及定时 |
| 英文描述： | LOW SKEW CLOCK DRIVER, 15 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PQFP48 |
| 封装： | 7 X 7 MM, 1.40 MM HEIGHT, MS-026, LQFP-48 |
| 文件页数： | 1/13页 |
| 文件大小： | 159K |
| 代理商： | ICS87949AY-01LF |
87949AY-01
www.icst.com/products/hiperclocks.html
REV. A JANUARY 2, 2002
1
Integrated
Circuit
Systems, Inc.
ICS87949-01
LOW SKEW
÷1, ÷2
CLOCK GENERATOR
PRELIMINARY
GENERAL DESCRIPTION
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.
FEATURES
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
BLOCK DIAGRAM
PIN ASSIGNMENT
48-Lead LQFP
7mm x 7mm x 1.4mm package body
Y Package
Top View
HiPerClockS
,&6
V
DDD
QD4
GND
QD3
V
DDD
QD2
GND
QD1
V
DDD
QD0
GND
MR/nOE
CLK_SEL
VDD
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
VDDC
QC1
GND
QC2
VDDC
QC3
GND
QD5
V
DDB
QB2
GND
QB1
V
DDB
QB0
GND
QA1
V
DDA
QA0
GND
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
0
1
0
1
0
1
0
1
R
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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PDF描述 |
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| ICS87949AY-01 | LOW SKEW CLOCK DRIVER, 15 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PQFP48 |
| ICS87949AY-01LFT | LOW SKEW CLOCK DRIVER, 15 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PQFP48 |
| ICS87949AY-01T | LOW SKEW CLOCK DRIVER, 15 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PQFP48 |
| ICS87949AY-01 | LOW SKEW CLOCK DRIVER, 15 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PQFP48 |
| ICS87949AYI-01 | LOW SKEW CLOCK DRIVER, 15 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PQFP48 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ICS87949AYI | 制造商:ICS 功能描述: |
| ICS87949AYILF | 功能描述:IC CLK GENERATOR /1 /2 52-LQFP RoHS:是 类别:集成电路 (IC) >> 时钟/计时 - 时钟发生器，PLL，频率合成器 系列:HiPerClockS™ 标准包装:2,000 系列:- 类型:PLL 频率合成器 PLL:是 输入:晶体 输出:时钟 电路数:1 比率 - 输入:输出:1:1 差分 - 输入:输出:无/无 频率 - 最大:1GHz 除法器/乘法器:是/无 电源电压:4.5 V ~ 5.5 V 工作温度:-20°C ~ 85°C 安装类型:表面贴装 封装/外壳:16-LSSOP（0.175"，4.40mm 宽） 供应商设备封装:16-SSOP 包装:带卷 (TR) 其它名称:NJW1504V-TE1-NDNJW1504V-TE1TR |
| ICS87949AYILFT | 功能描述:IC CLOCK GEN LVCMOS 52-LQFP RoHS:是 类别:集成电路 (IC) >> 时钟/计时 - 时钟发生器，PLL，频率合成器 系列:HiPerClockS™ 标准包装:1,000 系列:- 类型:时钟/频率合成器，扇出分配 PLL:- 输入:- 输出:- 电路数:- 比率 - 输入:输出:- 差分 - 输入:输出:- 频率 - 最大:- 除法器/乘法器:- 电源电压:- 工作温度:- 安装类型:表面贴装 封装/外壳:56-VFQFN 裸露焊盘 供应商设备封装:56-VFQFP-EP（8x8） 包装:带卷 (TR) 其它名称:844S012AKI-01LFT |
| ICS87950BYILF | 功能描述:IC CLK MULT LVCMOS/LVTTL 32-LQFP RoHS:是 类别:集成电路 (IC) >> 时钟/计时 - 时钟发生器，PLL，频率合成器 系列:HiPerClockS™ 标准包装:1,000 系列:- 类型:时钟/频率合成器，扇出分配 PLL:- 输入:- 输出:- 电路数:- 比率 - 输入:输出:- 差分 - 输入:输出:- 频率 - 最大:- 除法器/乘法器:- 电源电压:- 工作温度:- 安装类型:表面贴装 封装/外壳:56-VFQFN 裸露焊盘 供应商设备封装:56-VFQFP-EP（8x8） 包装:带卷 (TR) 其它名称:844S012AKI-01LFT |
| ICS87950BYILFT | 功能描述:IC CLOCK MULT 1-9 32-LQFP RoHS:是 类别:集成电路 (IC) >> 时钟/计时 - 时钟发生器，PLL，频率合成器 系列:HiPerClockS™ 标准包装:1,000 系列:- 类型:时钟/频率合成器，扇出分配 PLL:- 输入:- 输出:- 电路数:- 比率 - 输入:输出:- 差分 - 输入:输出:- 频率 - 最大:- 除法器/乘法器:- 电源电压:- 工作温度:- 安装类型:表面贴装 封装/外壳:56-VFQFN 裸露焊盘 供应商设备封装:56-VFQFP-EP（8x8） 包装:带卷 (TR) 其它名称:844S012AKI-01LFT |
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