參數(shù)資料
型號(hào)： FS6370-01G-XTD
廠商： ON Semiconductor
文件頁(yè)數(shù)： 24/28頁(yè)
文件大?。?/td> 0K
描述： IC CLOCK GEN 3-PLL EEPROM 16SOIC
標(biāo)準(zhǔn)包裝： 48
類(lèi)型： PLL 時(shí)鐘發(fā)生器
PLL： 是
輸入： 晶體
輸出： CMOS
電路數(shù)： 1
比率 - 輸入:輸出： 1:4
差分 - 輸入:輸出： 無(wú)/無(wú)
頻率 - 最大： 230MHz
除法器/乘法器： 是/無(wú)
電源電壓： 3 V ~ 5.5 V
工作溫度： 0°C ~ 70°C
安裝類(lèi)型： 表面貼裝
封裝/外殼： 16-SOIC（0.154"，3.90mm 寬）
供應(yīng)商設(shè)備封裝： 16-SOIC
包裝： 管件
產(chǎn)品目錄頁(yè)面： 1115 (CN2011-ZH PDF)
其它名稱： 766-1025
FS6370
3.3 Post Dividers
A post divider performs several useful functions. First, it allows the VCO to be operated in a narrower range of speeds compared to the
variety of output clock speeds that the device is required to generate. Second, it changes the basic PLL equation to:
where NP is the post divider modulus. The extra integer in the denominator permits more flexibility in the programming of the loop for
many applications where frequencies must be achieved exactly.
The modulus on two of the four post dividers (post dividers C and D in Figure 2) can be altered without reprogramming by a logic level
on the SEL_CD pin.
4.0 Device Operation
The FS6370 has two modes of operation:
Program mode: during which either the EEPROM or the FS6370 control registers can be programmed directly with the desired PLL
settings
Run mode: where the PLL settings stored the EEPROM are transferred to the FS6370 control registers on power-up, and the device
then operates based on those settings
Note that the EEPROM locations are not physically the same registers used to control the FS6370.
Direct access to either the EEPROM or the FS6370 control registers is achieved in program mode. The EEPROM register contents are
automatically transferred to the FS6370 control registers in normal device operation (run mode).
4.1 MODE Pin
The MODE pin controls the mode of operation. A logic-low places the FS6370 in program mode. A logic-high puts the device in run
mode. A pull-up on this pin defaults the device into run mode.
Reprogramming of either the control registers or the EEPROM is permitted at any time if the MODE pin is a logic-low.
Note, however, that a logic-high state on the MODE pin is latched so that only one transfer of EEPROM data to the FS6370 control
registers can occur. If a second transfer of EEPROM data into the FS6370 is desired, power (VDD) must be removed and reapplied to
the device.
The MODE pin also controls the function of the PD/SCL and OE/SDA pins. In run mode, these two pins function as power-down (PD)
and output enable (OE) controls. In program mode, the pins function as the I2C interface for clock (SCL) and data (SDA).
4.2 SEL_CD Pin
The SEL_CD pin provides a way to alter the operation of PLL C, muxes C and D, and post dividers C and D without having to
reprogram the device. A logic-low on the SEL_CD pin selects the control bits with a "C1" or "D1" notation, per Table 3. A logic-high on
the SEL_CD pin selects the control bits with "C2" or "D2" notation, per Table 3.
Note that changing between two running frequencies using the SEL_CD pin may produce glitches in the output, especially if the post-
divider(s) is/are altered.
4.3 Oscillator Overdrive
For applications where an external reference clock is provided (and the crystal oscillator is not required), the reference clock should be
connected to XOUT and XIN must be left unconnected (float).
Rev. 3 | Page 5 of 28 | www.onsemi.com
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
FS6370-01G-XTP 功能描述:時(shí)鐘發(fā)生器及支持產(chǎn)品 EE PROG 3-PLL CLOCK RoHS:否 制造商:Silicon Labs 類(lèi)型:Clock Generators 最大輸入頻率:14.318 MHz 最大輸出頻率:166 MHz 輸出端數(shù)量:16 占空比 - 最大:55 % 工作電源電壓:3.3 V 工作電源電流:1 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-56
FS6377 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:Programmable 3-PLL Clock Generator IC
FS6377-01 制造商:AMI 制造商全稱:AMI 功能描述:Programmable 3-PLL Clock Generator IC
FS6377-01G 制造商:AMI 制造商全稱:AMI 功能描述:Programmable 3-PLL Clock Generator IC
FS6377-01G-XTD 功能描述:時(shí)鐘發(fā)生器及支持產(chǎn)品 I2C PROG 3-PLL CLK RoHS:否 制造商:Silicon Labs 類(lèi)型:Clock Generators 最大輸入頻率:14.318 MHz 最大輸出頻率:166 MHz 輸出端數(shù)量:16 占空比 - 最大:55 % 工作電源電壓:3.3 V 工作電源電流:1 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-56
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