參數(shù)資料
型號(hào): DS3105LN+
廠商: Maxim Integrated Products
文件頁(yè)數(shù): 97/124頁(yè)
文件大?。?/td> 0K
描述: IC TIMING LINE CARD 64-LQFP
產(chǎn)品培訓(xùn)模塊: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝: 160
類型: 定時(shí)卡 IC,多路復(fù)用器
PLL:
主要目的: 以太網(wǎng),SONET/SDH,Stratum,電信
輸入: CMOS,LVDS,LVPECL,TTL
輸出: CMOS,LVDS,LVPECL,TTL
電路數(shù): 1
比率 - 輸入:輸出: 5:2
差分 - 輸入:輸出: 無(wú)/是
頻率 - 最大: 312.5MHz
電源電壓: 1.62 V ~ 1.98 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 64-LQFP
供應(yīng)商設(shè)備封裝: 64-LQFP(10x10)
包裝: 托盤(pán)
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DS3105
74
Register Name:
MCLK1
Register Description:
Master Clock Frequency Adjustment Register 1
Register Address:
3Ch
Bit #
7
6
5
4
3
2
1
0
Name
MCLKFREQ[7:0]
Default
1
0
1
0
1
Note: The MCLK1 and MCLK2 registers must be read consecutively and written consecutively. See Section 8.3.
Bits 7 to 0: Master Clock Frequency Adjustment (MCLKFREQ[7:0]). The full 16-bit MCLKFREQ[15:0] field
spans this register and MCLK2. MCLKFREQ is an unsigned integer that adjusts the frequency of the internal
204.8MHz master clock with respect to the frequency of the local oscillator clock on the REFCLK pin by up to
+514ppm and -771ppm. The master clock adjustment has the effect of speeding up the master clock with a positive
adjustment and slowing it down with a negative adjustment. For example, if the oscillator connected to REFCLK
has an offset of +1ppm, the adjustment should be -1ppm to correct the offset.
The formulas below translate adjustments to register values and vice versa. The default register value of 39,321
corresponds to 0ppm. See Section 7.3.
MCLKFREQ[15:0] = adjustment_in_ppm / 0.0196229 + 39,321
adjustment_in_ppm = (MCLKFREQ[15:0] – 39,321)
× 0.0196229
Register Name:
MCLK2
Register Description:
Master Clock Frequency Adjustment Register 2
Register Address:
3Dh
Bit #
7
6
5
4
3
2
1
0
Name
MLCKFREQ[15:8]
Default
1
0
1
0
1
Bits 7 to 0: Master Clock Frequency Adjustment (MCLKFREQ[15:8]). See the MCLK1 register description.
Register Name:
HOCR3
Register Description:
Holdover Configuration Register 3
Register Address:
40h
Bit #
7
6
5
4
3
2
1
0
Name
AVG
Default
1
0
1
0
Note: See Section 8.3 for important information about writing and reading this register.
Bit 7: Averaging (AVG). When this bit is set to 1 the T0 DPLL uses the averaged frequency value during holdover
mode. When FRUNHO = 1 in the MCR3 register, this bit is ignored. See Section 7.7.1.6.
0 = Not averaged frequency; holdover frequency is either free-run (FRUNHO = 1) or instantaneously
frozen.
1 = Averaged frequency over the last one second while locked to the input.
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