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SIT3521AE-4CF3325L1.000000Y: 产品描述HCSL Output Clock Oscillator, 1MHz Nom, QFN, 10 PIN; 产品类别无源元件振荡器; 文件大小3MB，共47页; 制造商SiTime; 标准

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SIT3521AE-4CF3325L1.000000Y概述

HCSL Output Clock Oscillator, 1MHz Nom, QFN, 10 PIN

SIT3521AE-4CF3325L1.000000Y规格参数

参数名称	属性值
是否Rohs认证	符合
厂商名称	SiTime
包装说明	LCC10,.12X.2,50/40
Reach Compliance Code	unknown
其他特性	ENABLE/DISABLE FUNCTION; COMPLEMENTARY OUTPUT
最长下降时间	0.465 ns
频率调整-机械	NO
频率稳定性	10%
JESD-609代码	e4
安装特点	SURFACE MOUNT
端子数量	10
标称工作频率	1 MHz
最高工作温度	105 °C
最低工作温度	-40 °C
振荡器类型	HCSL
输出负载	50 OHM, 2 pF
封装等效代码	LCC10,.12X.2,50/40
物理尺寸	5.0mm x 3.2mm x 0.9mm
最长上升时间	0.465 ns
最大压摆率	93 mA
最大供电电压	3.63 V
最小供电电压	2.97 V
标称供电电压	3.3 V
表面贴装	YES
最大对称度	55/45 %
端子面层	Nickel/Palladium/Gold (Ni/Pd/Au)

SIT3521AE-4CF3325L1.000000Y文档预览

SiT3521

Description

PRELIMINARY

1 to 340 MHz Elite Platform™ I

C/SPI Programmable Oscillator

Features



The

SiT3521

is an ultra-low jitter, user programmable

oscillator which offers the system designer great flexibility

and functionality.

The device supports two in-system programming options

after powering up at a default, factory programmed startup

frequency:



Any-frequency mode where the clock output can be re-

programmed to any frequency between 1 MHz and

340 MHz in 1 Hz steps

Digitally controlled oscillator (DCO) mode where the

clock output can be steered or pulled by up to

±3200

ppm with 5 to 94 ppt (parts per trillion) resolution.



The device’s default start-up frequency is specified in the

ordering code. User programming of the device is achieved

via I C or SPI. Up to 16 I C addresses can be specified by

the user either as a factory programmable option or via

hardware pins, enabling the device to share the I C with

other I C devices.

The SiT3521 utilizes SiTime’s unique DualMEMS™

temperature sensing and TurboCompensation™ technology

to deliver exceptional dynamic performance:



Programmable frequencies (factory or via I C/SPI)

from 1 MHz to 340 MHz

Digital frequency pulling (DCO) via I C/SPI



Output frequency pulling with perfect pull linearity



13 programmable pull range options to

±3200

ppm



Frequency pull resolution as low as 5 ppt (0.005 ppb)

0.21 ps typical integrated phase jitter (12 kHz to 20 MHz)

Integrated LDO for on-chip power supply noise filtering

0.02 ps/mV PSNR

-40°C to 105°C operating temperature

LVPECL, LVDS, or HCSL outputs



Programmable LVPECL, LVDS Swing



LVDS Common Mode Voltage Control

RoHS and REACH compliant, Pb-free, Halogen-free

and Antimony-free

Applications



Resistant to airflow and thermal shock

Resistant to shock and vibration

Superior power supply noise rejection

Combined with wide frequency range and user

programmability, this device is ideal for telecom, networking

and industrial applications that require a variety of

frequencies and operate in noisy environment.

Ethernet: 1/10/40/100/400 Gbps

G.fast and xDSL

Optical Transport: SONET/SDH, OTN

Clock and data recovery

Processor over-clocking

Low jitter clock generation

Server, storage, datacenter

Test and measurement

Broadcasting

Block Diagram

Package Pinout

(10-Lead QFN, 5.0 x 3.2 mm)

A/ K

SD C L

OE / NC

GND

VDD

OUT-

OUT+

A1 A0

/N /N

C/ C/

M SS

Figure 1. SiT3521 Block Diagram

Figure 2. Pin Assignments (Top view)

(Refer to

Table 14

for Pin Descriptions)

Rev 0.991

April 25, 2020

www.sitime.com

SiT3521

1 to 340 MHz Elite™ I

C/SPI Programmable Oscillator

Ordering Information

PRELIMINARY

SiT3521 AC -1C133 1 GG156.250000T

Part Family

“SiT3521”

12 mm Tape & Reel, 3ku reel

12 mm Tape & Reel, 1ku reel

[2]

Revision Letter

“A” is the revision of Silicon

Frequency

1.000000 to 340. 000000 MHz

Temperature Range

“C” : Extended Commercial, -20 to 70°C

“ I ” : Industrial, -40 to 85°C

“E” : Extended Industrial, -40 to 105°C

[1]

Signaling Type

“1”: LVPECL

“2”: LVDS

“4”: HCSL

DCXO Pull Range

“M”

“B”

“C”

“E”

“F”

“G”

“H”

“X”

“L”

“Y”

“S”

“Z”

“U”

± 25 ppm

± 50 ppm

± 80 ppm

±100 ppm

±125 ppm

±150 ppm

±200 ppm

±400 ppm

± 600 ppm

±800 ppm

±1200 ppm

±1600 ppm

±3200 ppm

Package Size

“C”: 5.0 x 3.2 mm

Frequency Stability/Grade

“F”: ±10 ppm

“1”: ±20 ppm

“2”: ±25 ppm

“3”: ±50 ppm

Serial IF mode

“S”

: SPI mode

[1]

“0-G”

: I

C mode (See below)

I C Factory Programmable Addresses

“0-F” : I C Address factory programmed

Sets Bits 3: 0 of Device I

C address to

the Hex value of the ordering code .

When the I C address is factory

programmed using these codes ,

pin A0, A1 are NC

“G”: I

C address controlled by A0, A1 pins

A1:A0

C Address

1100000

1100010

1101000

1101010 (default)

Voltage Supply

“25” :

“28” :

“30” :

“33” :

2.5V

2.8V

3.0V

3.3V

±10%

OE Pin Control

“-”: OE under software Control.

Pin 1 and 2 are both NC.

“1”: Pin 1 OE, Pin 2 NC

“2”: Pin 1 NC, Pin 2 OE

Notes:

1. -40 to 105°C option available only for I

C operation.

2. Bulk is available for sampling only.

Rev 0.991

Page 2 of 47

www.sitime.com

SiT3521

1 to 340 MHz Elite™ I

C/SPI Programmable Oscillator

TABLE OF CONTENTS

PRELIMINARY

Description ................................................................................................................................................................................... 1

Features....................................................................................................................................................................................... 1

Applications ................................................................................................................................................................................. 1

Block Diagram ............................................................................................................................................................................. 1

Ordering Information .................................................................................................................................................................... 2

1 Electrical Characteristics ......................................................................................................................................................... 4

2 Device Configurations and Pin-outs ........................................................................................................................................ 9

3 Waveform Diagrams ............................................................................................................................................................. 11

4 Termination Diagrams ........................................................................................................................................................... 13

4.1. LVPECL .................................................................................................................................................................... 13

4.2. LVDS ........................................................................................................................................................................ 15

4.3. HCSL ........................................................................................................................................................................ 16

5 Test Circuit Diagrams ........................................................................................................................................................... 17

6 Architecture Overview ........................................................................................................................................................... 19

7 Functional Overview ............................................................................................................................................................. 19

7.1. User Programming Interface ..................................................................................................................................... 19

7.2. Start-up output frequency and signaling types .......................................................................................................... 19

7.3. In-system programmable options.............................................................................................................................. 19

8 In-system Programmable Functional Description.................................................................................................................. 20

8.1. Any-frequency function ............................................................................................................................................. 20

8.2. DCO Functional Description ..................................................................................................................................... 24

8.3. Pull Range, Absolute Pull Range .............................................................................................................................. 26

8.4. Software OE Functional Description ......................................................................................................................... 28

9 I C/SPI Control Registers...................................................................................................................................................... 29

9.1. Register Address: 0x00. DCO Frequency Control Least Significant Word (LSW) .................................................... 29

9.2. Register Address: 0x01. OE Control, DCO Frequency Control Most Significant Word (MSW) ................................. 30

9.3. Register Address: 0x02. DCO PULL RANGE CONTROL ........................................................................................ 31

9.4. Register Address: 0x03. Flac-N PLL Integer Value and Flac-N PLL Fraction MSW ................................................. 32

9.5. Register Address: 0x04. Flac-N PLL Fraction LSW .................................................................................................. 32

9.6. Register Address: 0x05. PostDiv, Driver Control ...................................................................................................... 33

9.7. Register Address: 0x06. mDriver, Driver Control ...................................................................................................... 34

10 I C Operation ........................................................................................................................................................................ 35

10.1. I C protocol ............................................................................................................................................................... 35

10.2. I C Timing Specification ............................................................................................................................................ 37

10.3. I C Device Address Modes ....................................................................................................................................... 38

11 SPI Operation ....................................................................................................................................................................... 39

Schematic Examples ................................................................................................................................................................. 42

Dimensions and Patterns ........................................................................................................................................................... 45

Additional Information ................................................................................................................................................................ 46

Revision History ......................................................................................................................................................................... 47

Rev 0.991

Page 3 of 47

www.sitime.com

SiT3521

1 to 340 MHz Elite™ I

C/SPI Programmable Oscillator

1 Electrical Characteristics

PRELIMINARY

All Min and Max limits in the Electrical Characteristics tables are specified over temperature and rated operating voltage with

standard output terminations shown in the termination diagrams. Typical values are at 25°C and nominal supply voltage.

Table 1. Electrical Characteristics – Common to LVPECL, LVDS and HCSL

Parameter

Output Frequency Range

Frequency Stability

Symbol

F_stab

Min.

-10

-20

-25

-50

First Year Aging

Operating Temperature Range

F_1y

T_use

–

-20

-40

Supply Voltage

Vdd

2.97

2.7

2.52

2.25

Input Voltage High

Input Voltage Low

Input Pull-up Impedance

Duty Cycle

Start-up Time

Output Enable/Disable Time –

Hardware control via OE pin

Output Enable/Disable Time –

Software control via I

C/SPI

VIH

VIL

Z_in

T_start

T_oe_hw

70%

–

Typ.

–

±1

–

3.3

3.0

2.8

2.5

–

100

–

Max.

340

+10

+20

+25

+50

–

+70

+85

+105

Supply Voltage

3.63

3.3

3.08

2.75

–

30%

–

3.0

3.8

Vdd

kΩ

µs

Measured from the time Vdd reaches its rated minimum value

Measured from the time OE pin reaches rated VIH and VIL to

the time clock pins reach 90% of swing and high-Z.

See

Figure 9

and

Figure 10

Measured from the time the last byte of command is

transmitted via I

C/SPI (reg1) to the time clock pins reach 90%

of swing and high-Z. See

Figure 30

and

Figure 31

OE pin

OE pin, logic high or logic low

Unit

MHz

ppm

°C

1 -year aging at 25°C

Extended Commercial

Industrial

Extended Industrial. Available only for I C operation, not SPI.

Condition

Factory or user programmable, accurate to 6 decimal places

Inclusive of initial tolerance, operating temperature, rated

power supply voltage and load variations.

Frequency Range

Frequency Stability

Temperature Range

Input Characteristics – OE Pin

Output Characteristics

Startup and Output Enable/Disable Timing

T_oe_sw

–

6.5

µs

Rev 0.991

Page 4 of 47

www.sitime.com

SiT3521

1 to 340 MHz Elite™ I

C/SPI Programmable Oscillator

Table 2. Electrical Characteristics – LVPECL Specific

Parameter

Symbol

Min.

Typ.

Max.

Unit

PRELIMINARY

Condition

Current Consumption

OE Disable Supply Current

Output Disable Leakage Current

Maximum Output Current

Idd

I_OE

I_leak

I_driver

–

0.15

–

A

Excluding Load Termination Current, Vdd = 3.3V or 2.5V

OE = Low

Maximum average current drawn from OUT+ or OUT-

Output Characteristics

Output High Voltage

Output Low Voltage

Output Differential Voltage Swing

Rise/Fall Time

VOH

VOL

V_Swing

Tr, Tf

Vdd - 1.1V

Vdd - 1.9V

1.2

–

1.6

225

Vdd - 0.7V

Vdd - 1.5V

2.0

290

Jitter

RMS Phase Jitter (random) –

DCO Mode Only

T_phj

–

RMS Phase Jitter (random) –

Any-frequency Mode Only

T_phj

–

RMS Period Jitter

[3]

Note:

3. Measured according to JESD65B.

T_jitt

–

0.225

0.1

0.225

0.11

0.340

0.14

0.340

0.15

1.6

f = 156.25 MHz, Integration bandwidth = 12 kHz to 20 MHz,

all Vdd levels

f = 156.25, IEEE802.3-2005 10 GbE jitter mask integration

bandwidth = 1.875 MHz to 20 MHz, all Vdd levels

f = 156.25 MHz, Integration bandwidth = 12 kHz to 20 MHz,

all Vdd levels

f = 156.25, IEEE802.3-2005 10 GbE jitter mask integration

bandwidth = 1.875 MHz to 20 MHz, all Vdd levels

f = 100, 156.25 or 212.5 MHz, Vdd = 3.3V or 2.5V

See

Figure 5

See

Figure 5

See

Figure 6

20% to 80%, see

Figure 6

Table 3. Electrical Characteristics – LVDS Specific

Parameter

Symbol

Min.

Typ.

Max.

Unit

Condition

Current Consumption

OE Disable Supply Current

Output Disable Leakage Current

Idd

I_OE

I_leak

–

0.15

–

A

Excluding Load Termination Current, Vdd = 3.3V or 2.5V

OE = Low

Output Characteristics

Differential Output Voltage

Delta VOD

Offset Voltage

Delta VOS

Rise/Fall Time

VOD

ΔVOD

VOS

ΔVOS

Tr, Tf

250

–

1.125

–

400

455

1.375

470

Jitter

RMS Phase Jitter (random) –

DCO Mode Only

T_phj

–

RMS Phase Jitter (random) –

Any-frequency Mode Only

T_phj

–

RMS Period Jitter

[4]

Note:

4. Measured according to JESD65B.

T_jitt

–

0.21

0.1

0.21

0.1

0.275

0.12

0.367

0.12

1.6

f = 156.25 MHz, Integration bandwidth = 12 kHz to 20 MHz,

all Vdd levels

f = 156.25, IEEE802.3-2005 10 GbE jitter mask integration

bandwidth = 1.875 MHz to 20 MHz, all Vdd levels

f = 156.25 MHz, Integration bandwidth = 12 kHz to 20 MHz,

all Vdd levels

f = 156.25, IEEE802.3-2005 10 GbE jitter mask integration

bandwidth = 1.875 MHz to 20 MHz, all Vdd levels

f = 100, 156.25 or 212.5 MHz, Vdd = 3.3V or 2.5V

f = 156.25MHz See

Figure 7

See

Figure 7

See

Figure 7

See

Figure 7

Measured with 2 pF capacitive loading to GND, 20% to 80%,

see

Figure 8

Rev 0.991

Page 5 of 47

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几种数字卫星接收机开关电源典型故障检修

下面列举的典型故障检修供维修人员参考。开机，指示灯不亮，无屏显检修：拆开机壳观察，未见元件烧焦、电容爆裂现象。仅2A保险烧断。用万用表R×1挡，测量桥式整流二极管在路反向电阻时发现，D1只有18Ω，D3更小，证明已击穿。拆下D1、D3，再没D2、D4反向电阻无穷大，正向电阻18Ω，说明未烧坏。用黑笔接热地点，红笔测A点，正常应为200Ω左右，但测得正反向电阻均为23Ω。怀疑是U1击穿，直...[详细]
基于STM32LED书写点阵屏设计与实现

近年来，随着信息产业的高速发展，点阵LED 显示屏已广泛应用于金融行业、邮电行业、体育馆、广告业等各种广告发布和信息显示系统，成为信息传送的重要手段。本文介绍的LED 书写点阵屏，不但可以像普通显示屏一样作为信息输出设备，而且可以通过光笔直接在LED 显示屏上进行信息输入，普通的显示屏也具有"手写"的功能了。 1 硬件系统设计本系统总体框图如图1 所示，由键盘与显示模块、光笔模块、LED ...[详细]
联想最新的中国移动定制智能手机搭载意法•爱立信平台

中国北京，2012年7月10日 – 全球领先的移动平台和半导体供应商意法•爱立信今天宣布，联想最新的乐Phone S899t中国移动定制智能手机采用意法•爱立信的Nova™ A9500应用处理器。内置1.0GHz双核ARM Cortex-A9 CPU和高端3D图形加速器，Nova A9500让联想乐Phone用户能够在中国移动TD网络上尽情体验智能手机的使用乐趣。联想乐PhoneS899t是...[详细]
MCS-51单片机输入／输出口的P0并行扩展方法

在单片机家族的众多成员中，MCS-51系列单片机以其优越的性能、成熟的技术、高可靠性和高性价比,占领了工业测控和自动化工程应用的主要市场，并成为国内单片机应用领域中的主流机型。 MCS-51单片机的并行口有P0、P1、P2和P3，由于P0口是地址／数据总线口，P2口是高8位地址线，P3口具有第二功能，这样，真正可以作为双向I／O口应用的就只有P1口了。这在大多数应用中是不够的，因此，大部分MC...[详细]
单片机定时器/计数器的方式控制字

从上一节我们已经得知，单片机中的定时/计数器都能有多种用途，那么我怎样才能让它们工作于我所需要的用途呢？这就要通过定时/计数器的方式控制字来设置。在单片机中有两个特殊功能寄存器与定时/计数有关，这就是TMOD和TCON。顺便说一下，TMOD和TCON是名称，我们在写程序时就能直接用这个名称来指定它们，当然也能直接用它们的地址89H和88H来指定它们（其实用名称也就是直接用地址，汇编软件帮你翻...[详细]
自诊断传感器模块提升汽车网络效率

如今汽车内的电子元件价值已占到总车的15～20%。未来，随着车辆中植入更多的安全电子设备、燃油消耗和燃料排放控制系统、通信和导航系统、信息娱乐系统以及其他提升舒适度的电子系统，该比例可能会高达30～40%。　　目前实现上述功能需要20～50个电子控制单元(ECU)，所用到的传感器差不多有70～150个。这些传感器负责测量的环境数据范围很广，有压力、温度、流量、速度、加速度以及角度等。它们将测...[详细]
基于北斗二代系统的嵌入式船用导航仪硬件设计

摘要：随着北斗二代系统的研制与建设，在导航领域我国将会从GPS主宰的局面转向为以我国自主研发的北斗二代全球导航系统为主的局面。为了实现北斗船用导航仪更轻便、快捷、低功耗和低成本，提出了一种采用ARM9系列的S3C2440A为处理器的北斗船用导航仪硬件设计方案，详细给出了系统的硬件体系结构和具体的硬件选型及接口电路设计。并对整个系统进行了硬件平台的搭建和测试，给出了北斗信号处理部分的硬件设计电...[详细]

器件捷径: E0 E1 E2 E3 E4 E5 E6 E7 E8 E9 EA EB EC ED EE EF EG EH EI EJ EK EL EM EN EO EP EQ ER ES ET EU EV EW EX EY EZ F0 F1 F2 F3 F4 F5 F6 F7 F8 F9 FA FB FC FD FE FF FG FH FI FJ FK FL FM FN FO FP FQ FR FS FT FU FV FW FX FY FZ G0 G1 G2 G3 G4 G5 G6 G7 G8 G9 GA GB GC GD GE GF GG GH GI GJ GK GL GM GN GO GP GQ GR GS GT GU GV GW GX GZ H0 H1 H2 H3 H4 H5 H6 H7 H8 HA HB HC HD HE HF HG HH HI HJ HK HL HM HN HO HP HQ HR HS HT HU HV HW HX HY HZ I1 I2 I3 I4 I5 I6 I7 IA IB IC ID IE IF IG IH II IK IL IM IN IO IP IQ IR IS IT IU IV IW IX J0 J1 J2 J6 J7 JA JB JC JD JE JF JG JH JJ JK JL JM JN JP JQ JR JS JT JV JW JX JZ K0 K1 K2 K3 K4 K5 K6 K7 K8 K9 KA KB KC KD KE KF KG KH KI KJ KK KL KM KN KO KP KQ KR KS KT KU KV KW KX KY KZ

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