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ASM3P2854BG-16TR PDF预览

ASM3P2854BG-16TR

更新时间: 2024-11-25 06:38:11
品牌 Logo 应用领域
PULSECORE 晶体时钟发生器微控制器和处理器外围集成电路光电二极管
页数 文件大小 规格书
8页 384K
描述
Custom Clock Generator for Fax System

ASM3P2854BG-16TR 技术参数

生命周期:Obsolete包装说明:4.40 MM, GREEN, TSSOP-16
Reach Compliance Code:unknown风险等级:5.84
Is Samacsys:NJESD-30 代码:R-PDSO-G16
长度:5 mm端子数量:16
最高工作温度:70 °C最低工作温度:
最大输出时钟频率:66.6 MHz封装主体材料:PLASTIC/EPOXY
封装代码:TSSOP封装形状:RECTANGULAR
封装形式:SMALL OUTLINE, THIN PROFILE, SHRINK PITCH主时钟/晶体标称频率:24 MHz
认证状态:Not Qualified座面最大高度:1.2 mm
最大供电电压:3.6 V最小供电电压:3 V
标称供电电压:3.3 V表面贴装:YES
技术:CMOS温度等级:COMMERCIAL
端子形式:GULL WING端子节距:0.65 mm
端子位置:DUAL宽度:4.4 mm
uPs/uCs/外围集成电路类型:CLOCK GENERATOR, OTHERBase Number Matches:1

ASM3P2854BG-16TR 数据手册

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August 2007  
rev 0.3  
ASM3P2854B  
Custom Clock Generator for Fax System  
Features  
Generates Custom Clocks for FAX system from  
an inexpensive 24MHz Crystal  
1x 25MHz low EMI (Spread Spectrum) clock for  
LCD, Serial port, and buzzer of ASIC1  
1x 12MHz for USB PHY (USB2.0)  
1x Programmable clock for printer engine control  
One of the four programmable clock outputs  
selection through two Select Pins  
Supply Voltage 3.3V +/- 0.3V  
Available in 16L TSSOP, Green package  
Commercial Temperature operation  
2x 66.66MHz low EMI (Spread Spectrum) clocks  
for ASIC1 (System / DDR SDRAM)  
1 x 48MHz for USB1.1 HOST  
2 x 33.33MHz low EMI (Spread Spectrum)  
clocks for System / DDR SDRAM of ASIC2 and  
ASIC3  
Product Description  
ASM3P2854B is a part of the two chip custom clock  
generator solution for NEC FAX system. Together with  
ASM3P2855A, ASM3P2854B realizes all the seventeen  
clocks required by the various components and  
subsystems of the FAX system. It uses an inexpensive  
24MHz crystal as the input to generate two 66.66MHz low  
EMI (spread spectrum) clocks used by ASIC1 for system  
48MHz clock used by USB1.1 HOST, and a 12MHz clock  
used by USB PHY (USB2.0). One of the four  
Programmable  
24.00448MHz,  
clock  
21.33732MHz,  
(PCLK)  
frequencies  
21.19962MHz  
of  
and  
20.40464MHz used for Printer Engine control is  
selectable through two Select pins S1 and S2. The  
accuracy of the synthesized programmable clocks is  
within +/- 18ppm. The custom clock generator works with  
a Supply Voltage for 3.3V. The device is available in a  
16L TSSOP Green package, in commercial temperature  
range. The output Clocks have an accuracy of ±50ppm.  
/
DDR SDRAM, two 33.33MHz low EMI (spread  
spectrum) clocks used by ASIC2 and ASIC3 for system /  
DDR SDRAM, a 25MHz low EMI (Spread Spectrum)  
clock used by ASIC1 for LCD, Serial port, and buzzer, a  
VDD_FOUT  
Block Diagram  
VDD  
2
66.6MHz SSCLK  
2
PLL  
33.3MHz SSCLK  
25MHz SSCLK  
XIN / CLKIN  
XOUT  
48MHz  
Crystal  
PLL  
PLL  
(24 MHz)  
12MHz  
PCLK  
S1  
S2  
GND_FOUT  
GND  
PulseCore Semiconductor Corporation  
1715 S. Bascom Ave Suite 200 Campbell, CA 95008 Tel: 408-879-9077 Fax: 408-879-9018  
www.pulsecoresemi.com  
Notice: The information in this document is subject to change without notice.  

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