参数资料
| 型号： | SY87739LHG |
| 厂商： | Micrel Inc |
| 文件页数： | 4/17页 |
| 文件大小： | 0K |
| 描述： | IC SYNTHESIZER FRACT 3.3V 32TQFP |
| 标准包装： | 250 |
| 系列： | AnyClock® |
| 类型： | 分数合成器 |
| PLL： | 是 |
| 主要目的： | 以太网，光纤通道，SONET/SDH/ATM |
| 输入： | PECL |
| 输出： | PECL |
| 电路数： | 1 |
| 比率 - 输入:输出： | 1:1 |
| 差分 - 输入:输出： | 是/是 |
| 频率 - 最大： | 729MHz |
| 电源电压： | 3.15 V ~ 3.45 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 32-TQFP 裸露焊盘 |
| 供应商设备封装： | 32-EPAD-TQFP |
| 包装： | 托盘 |
| 其它名称： | 576-1407 |
Micrel, Inc.
SY87739L
June 2011
12
M9999-061511
hbwhelp@micrel.com or (408) 955-1690
PostDivSel Bit
4
3
2
1
0
Divisor
0
1
0
1
3
0
1
0
2
0
1
3
0
1
0
4
0
1
0
1
5
0
1
0
6
0
1
7
0
1
0
8
0
1
0
1
9
0
1
0
1
0
10
0
1
0
1
11
0
1
0
12
0
1
0
1
13
0
1
0
14
0
1
15
1
0
16
1
0
1
18
1
0
1
0
20
1
0
1
22
1
0
1
0
24
1
0
1
0
1
26
1
0
1
0
28
1
0
1
30
1
0
32
1
0
1
36
1
0
1
0
40
1
0
1
44
1
0
48
1
0
1
52
1
0
56
1
60
Table 5. Setting to Program the Division Ratio of the P
Divider
The divisor value is selected via MicroWire. The 5-bit
PostDivSel register determines the divisor value. It is set
as per Table 5. The SY87739L does not guarantee a
50% duty cycle output. It is designed to provide well
timed rising edges only.
MicroWire Interface
This standard bit-serial interface eases interfacing the
SY87739L to microcontrollers. The SY87739L accepts
one data bit on PROGDI per rising edge on PROGSK.
The data is ignored when PROGCS is inactive low.
When PROGCS is active high, bits are shifted into the
SY87739L. The falling edge of PROGCS then initiates
acquisition of the output frequency defined by the 32-bit
program just loaded into the SY87739L.
This means that, if the user wishes to re-acquire based
on the same program, PROGCS needs to toggle high
then low.
Programming
To program the SY87739L to generate a certain
frequency:
1.
Determine the required values of the programming
parameters, as summarized in Table 6.
2.
Set PROGCS active high.
3.
Shift in each of the 32 bits, as per Table 6. The fields
are loaded in sequence, from the first row to the last
row. For each multi-bit field, the most significant bit
is shifted in first. Shift the bits in through PROGDI,
clocking them with PROGSK edges.
4.
Set PROGCS inactive low.
5.
Wait for LOCKED to assert high.
Field
# Bits
Reference
Preamble
4
Always “000”
qp
5
Section: Gating the P/P-1Divider
qpm1
5
Section: Gating the P/P-1Divider
divsel
4
Table 1
Mfg.
3
Always “000”
PostDivSel
5
Table 5
NdivSel
3
Table 4
MdivSel
3
Table 3
Table 6. Programming Sequence
The SY87739L generates exact frequencies for common
serial data streaming protocols. Summary programming
information appears in the next section. The SY87739L
also enables Micrel’s SY87721L AnyRate CDR to
decode virtually anything within its range of operation, all
from a 27.000MHz reference. Details about how to
program the SY87739L in the general case, including
derivation of programs for both the standard protocols
and the AnyRate application, appear in an applications
note.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SY87739LHI | 功能描述:IC SYNTHESIZER FRACT 3.3V 32TQFP RoHS:否 类别:集成电路 (IC) >> 时钟/计时 - 专用 系列:AnyClock® 标准包装:1,500 系列:- 类型:时钟缓冲器/驱动器 PLL:是 主要目的:- 输入:- 输出:- 电路数:- 比率 - 输入:输出:- 差分 - 输入:输出:- 频率 - 最大:- 电源电压:3.3V 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:28-SSOP（0.209"，5.30mm 宽） 供应商设备封装:28-SSOP 包装:带卷 (TR) 其它名称:93786AFT |
| SY87739LHITR | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:PROTOCOL TRANSPARENT 3.3V 10MHz to 729MHz FRACTIONAL-N SYNTHESIZER |
| SY87739LHY | 功能描述:时钟合成器/抖动清除器 3.3V Fractional N Synthesizer (10MHz to 729MHz) (Lead Free/I Temp/32 pin TQFP) RoHS:否 制造商:Skyworks Solutions, Inc. 输出端数量: 输出电平: 最大输出频率: 输入电平: 最大输入频率:6.1 GHz 电源电压-最大:3.3 V 电源电压-最小:2.7 V 封装 / 箱体:TSSOP-28 封装:Reel |
| SY87739LHY TR | 功能描述:时钟合成器/抖动清除器 3.3V Fractional N Synthesizer (10MHz to 729MHz) (Lead Free/I Temp/32 pin TQFP) RoHS:否 制造商:Skyworks Solutions, Inc. 输出端数量: 输出电平: 最大输出频率: 输入电平: 最大输入频率:6.1 GHz 电源电压-最大:3.3 V 电源电压-最小:2.7 V 封装 / 箱体:TSSOP-28 封装:Reel |
| SY87739LHYTR | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:PROTOCOL TRANSPARENT 3.3V 10MHz to 729MHz FRACTIONAL-N SYNTHESIZER |
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