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ICS9134-06 PDF预览

ICS9134-06

更新时间: 2024-09-16 22:13:23
品牌 Logo 应用领域
矽成 - ICSI /
页数 文件大小 规格书
6页 207K
描述
32 kHz Motherboard Frequency Generator

ICS9134-06 数据手册

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ICS9134-06  
ICS9134-07  
Integrated  
Circuit  
Systems, Inc.  
Advance Information  
32 kHz Motherboard Frequency Generator  
General Description  
Features  
The ICS9134-06 and ICS9134-07 are designed to generate  
clocks for all 286, 386, 486, Pentium and RISC-based mother-  
boards, including laptops and notebook computers. The only  
external components required are a 32.768 kHz crystal and  
decoupling capacitors. The device generates the 14.318 MHz  
system clock, eliminating the need for a 14.318 MHz crystal.  
High performance applications may require high speed clock  
termination components. The chip includes three independent  
clock generators plus the 32.768 kHz reference clock to pro-  
duce all necessary frequencies, including real time  
clock/DRAM refresh, master clock, CPU clock, keyboard  
clock, floppy disk controller clock, serial communications  
clock and bus clocks. Different frequencies from clocks #2 can  
be selected using the frequency select pins, but clock #1 will  
be at 14.318 MHz for all standard versions.  
IDD <10 µA when 32 kHz is running on VDD32  
Single 32.768 kHz crystal generates all PC motherboard  
clocks  
3 independent clock generators  
Generates CPU clocks from 4.0 to 80 MHz  
Up to 5 output clocks  
Separate VDD for 32 kHz clock  
Power-down options available  
Operates from 3.3V or 5.0V supply  
Operates up to 66 MHz at 3.3V  
Supports OPTi 80C463/5 and Fir chipsets  
16-pin, 300-mil, SOIC package  
VDD32 Supply  
Applications  
The ICS9134-06 and ICS9134-07 have a separate power sup-  
ply for the 32.768 kHz oscillator circuitry. This allows the  
32 kHz clock to run from a battery or other source while the  
main power to the chip is disconnected. The VDD32 supply is  
guaranteed to operate down to +2.0V, with the clock consuming  
less than 10µA at +3.3V with the main VDD at 0V.  
Notebook/Palmtop Computers: The ICS9134-06 and  
ICS9134-07 work with +3.3V and +5V and a single  
32.768 kHz crystal, making it the ideal solution for generating  
clocks in portables with minimum board space. The user can  
save power by using this single part instead of oscillators or  
other frequency generators. TheICS9134-06 and ICS9134-07  
further reduce the current consumption by having the ability to  
completelyshut downtheindividual clocks whennotinuse,while  
still maintaining the separately powered 32.768 kHz clock.  
The frequencies and power-down options in the ICS9134-06  
and ICS9134-07 are mask programmable. Customer specific  
masks can be made and prototypes delivered within 6-8 weeks  
from receipt of order. Integrated Circuit Systems also offers  
standard versions, such as that described in this data sheet.  
Block Diagram  
Fir is a trademark of Picopower Corporation.  
9134-06 9134-07 RevC111695  

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