参数资料
型号: ICS840004AG-11LFT
厂商: IDT, Integrated Device Technology Inc
文件页数: 1/13页
文件大小: 0K
描述: IC FREQ SYNTHESIZER 20-TSSOP
标准包装: 2,500
系列: HiPerClockS™, FemtoClock™
类型: 频率合成器
PLL:
输入: 晶体
输出: LVCMOS,LVTTL
电路数: 1
比率 - 输入:输出: 1:4
差分 - 输入:输出: 无/无
频率 - 最大: 140MHz
除法器/乘法器: 是/无
电源电压: 3.135 V ~ 3.465 V
工作温度: 0°C ~ 70°C
安装类型: 表面贴装
封装/外壳: 20-TSSOP(0.173",4.40mm 宽)
供应商设备封装: 20-TSSOP
包装: 带卷 (TR)
其它名称: 840004AG-11LFT
DATA SHEET
ICS840004AG-11 REVISION A SEPTEMBER 16, 2009
1
2009 Integrated Device Technology, Inc.
FemtoClock Crystal-to-LVCMOS/LVTTL
Frequency Synthesizer
ICS840004-11
General Description
The ICS840004-11 is a 4 output LVCMOS/LVTTL
Synthesizer optimized to generate Ethernet reference
clock frequencies and is a member of the
HiPerClocks family of high performance clock
solutions from IDT. Using a 25MHz, 18pF parallel
resonant crystal, 125MHz and 62.5MHz can be generated based on
one frequency select pin (F_SEL). The ICS840004-11 uses IDT’s 3rd
generation low phase noise VCO technology and can achieve 1ps or
lower typical random rms phase jitter, easily meeting Ethernet jitter
requirements. The ICS840004-11 is packaged in a small 20-pin
TSSOP package.
Features
Four single-ended LVCMOS/LVTTL outputs
17
typical output impedance
Crystal oscillator interface
Input frequency range: 22.4MHz to 28MHz
Output frequency range: 56MHz - 140MHz
VCO range: 560MHz - 700MHz
RMS phase jitter at 125MHz (1.875MHz – 20MHz):
0.70ps (typical)
Phase Noise:
Offset
Noise Power
100Hz
-95.5 dBc/Hz
1kHz
-123.6 dBc/Hz
10kHz
-132.8 dBc/Hz
100kHz
-133.4 dBc/Hz
Full 3.3V output supply mode
0°C to 70°C ambient operating temperature
Available in both standard (RoHS 5) and lead-free (RoHS 6)
packages
Frequency Select Function Table for Ethernet Frequencies
HiPerClockS
ICS
Inputs
Output Frequency (MHz), 25MHz Reference
F_SEL
M Divider Value
N Divider Value
0
25
10
62.5
1
25
5
125 (default)
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
nc
VDDA
nc
OE
nc
F_SEL
VDD
nc
GND
Q0
Q1
VDDO
Q2
Q3
GND
XTAL_IN
XTAL_OUT
OSC
VCO
M = ÷25 (fixed)
F_SEL
0 ÷10
1 ÷5 (default)
N
Phase
Detector
Q0
Q1
Q2
Q3
OE
F_SEL
XTAL_IN
XTAL_OUT
25MHz
Pullup
ICS840004-01
20-Lead TSSOP
6.5mm x 4.4mm x 0.925mm
package body
G Package
Top View
Pin Assignment
Block Diagram
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