参数资料
| 型号： | DS1181LE+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 1/6页 |
| 文件大小： | 0K |
| 描述： | IC CLOCK MOD SS 8-TSSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 类型： | 扩展频谱时钟调制器 |
| PLL： | 是 |
| 主要目的： | LCD 面板 |
| 输入： | 时钟 |
| 输出： | LVCMOS |
| 电路数： | 1 |
| 比率 - 输入:输出： | 1:1 |
| 差分 - 输入:输出： | 无/无 |
| 频率 - 最大： | 134MHz |
| 电源电压： | 3 V ~ 3.6 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 8-TSSOP |
| 包装： | 带卷 (TR) |
General Description
The DS1181L is a spread-spectrum clock modulator IC
that reduces EMI in high clock-frequency-based, digital
electronic equipment.
Using an integrated phase-locked loop (PLL), the
DS1181L accepts an input clock signal in the range of
20MHz to 134MHz and delivers a spread-spectrum mod-
ulated output clock signal. The PLL modulates, or dithers,
the output clock about the center input frequency at a
pin-selectable magnitude, allowing direct EMI control and
optimization. In addition, through an enable pin the dither-
ing can be enabled or disabled for easy comparison of
system performance during EMI testing. This same input
pin also allows the DS1181L output to be three-stated.
By dithering the system clock, all the address, data,
and timing signals generated from this signal are also
dithered so that the measured EMI at the fundamental
and harmonic frequencies is greatly reduced. This is
accomplished without changing clock rise/fall times or
adding the space, weight, design time, and cost asso-
ciated with mechanical shielding.
The DS1181L is provided in an 8-pin TSSOP package
and operates over a full automotive temperature range
of -40°C to +125°C.
Applications
LCD Panels for TVs, Desktop Monitors, and
Notebook and Tablet PCs
Automotive Telematics and Infotainment
Printers
Features
Modulates a 20MHz to 134MHz Clock with Center
Spread-Spectrum Dithering
Selectable Spread-Spectrum Modulation
Magnitudes of:
±0.5%
±1.0%
±1.5%
±2.0%
Low 75ps Cycle-to-Cycle Jitter
Spread-Spectrum Disable Mode
Pin Compatible with Alliance/PulseCore
Semiconductor P2040 Series Devices
Clock Output Disable
Low Cost
Low Power Consumption
3.3V Single Voltage Supply
-40°C to +125°C Temperature Range
Small 8-Pin TSSOP Package
DS1181L
20MHz to 134MHz Spread-Spectrum
Clock Modulator for LCD Panels
________________________________________________________________
Maxim Integrated Products
1
Rev 1; 8/08
+
Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
DS1181LE+
-40°C to +125°C
8 TSSOP
DS1181LE+T
-40°C to +125°C
8 TSSOP
Block Diagram
GND
SSO
PLL WITH CENTER-
DITHERED
SPREAD-
SPECTRUM
CONFIGURATION
DECODE AND
CONTROL
SMSEL1
CLKIN
SMSEL2
fSSO = 20MHz to
134MHz (DITHERED)
VCC
fIN = 20MHz TO
134MHz
CRSEL
SSEN
ENABLE
LOGIC
DS1181L
SSO
GND
1
2
8
7
CRSEL
SMSEL1
SMSEL2
CLKIN
TSSOP
TOP VIEW
3
4
6
5
VCC
SSEN
DS1181L
+
Pin Configuration
For information on other Maxim products, visit Maxim’s website at www.maxim-ic.com.
Typical Operating Circuit appears at end of data sheet.
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