DSC1121BE5 [MICREL]

Low-Jitter Precision CMOS Oscillator;


型号：	DSC1121BE5
厂家：	MICREL SEMICONDUCTOR
描述：	Low-Jitter Precision CMOS Oscillator
文件：	总7页 (文件大小：697K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

DSC1101 DSC1121

Low-Jitter Precision CMOS Oscillator

General Description

Features

The DSC1101 & DSC1121 series of high

performance oscillators utilizes a proven

silicon MEMS technology to provide excellent

jitter and stability over a wide range of

 Low RMS Phase Jitter: <1 ps (typ)

 High Stability: ±10, ±25, ±50 ppm

 Wide Temperature Range

o Automotive: -55° to 125° C

o Ext. Industrial: -40° to 105° C

o Industrial: -40° to 85° C

supply voltages and temperatures.

eliminating the need for quartz or SAW

technology, MEMS oscillators significantly

enhance reliability and accelerate product

development, while meeting stringent clock

performance criteria for a variety of

communications, storage, and networking

applications.

o Ext. commercial: -20° to 70° C

 High Supply Noise Rejection: -50 dBc

 Short Lead Time: 2 Weeks

 Wide Freq. Range: 2.3 to 170 MHz

DSC1101 has a standby feature allowing it to

completely power-down when EN pin is

pulled low; whereas for DSC1121, only the

outputs are disabled when EN is low. Both

oscillators are available in industry standard

packages, including the small 3.2x2.5 mm²,

and are “drop-in” replacements for standard

4-pin CMOS quartz crystal oscillators.

 Small Industry Standard Footprints

o 2.5x2.0, 3.2x2.5, 5.0x3.2, & 7.0x5.0 mm

 Excellent Shock & Vibration Immunity

o Qualified to MIL-STD-883

 High Reliability

o 20x better MTF than quartz oscillators

 Low Current Consumption

 Supply Range of 2.25 to 3.6 V

 Standby & Output Enable Function

 Lead Free & RoHS Compliant

Block Diagram

Applications

 Storage Area Networks

o SATA, SAS, Fibre Channel

 Passive Optical Networks

o EPON, 10G-EPON, GPON, 10G-PON

 Ethernet

o 1G, 10GBASE-T/KR/LR/SR, and FCoE

 HD/SD/SDI Video & Surveillance

 PCI Express

Output Enable Modes

EN Pin

High

DSC1101

Output Active

Standby

DSC1121

Output Active

Output Disabled

 DisplayPort

Low

______________________________________________________________________________________________________________________________________________

DSC1101 | DSC1121 Page 1 MK-Q-B-P-D-110410-01-6

Low-Jitter Precision CMOS Oscillator

DSC1101 DSC1121

Absolute Maximum Ratings

Ordering Code

Item

Min

-0.3

Max

+4.0

Unit Condition

Temp Range

E: -20 to 70

I: -40 to 85

L: -40 to 105

M: -55 to 125

Supply Voltage

Input Voltage

Junction Temp

Storage Temp

Soldering Temp

Enable Modes

0: Enable/Standby

2: Enable/Disable

Packing

T: Tape & Reel

: Tube

V_DD+0.3

+150

°C

-55

+150

DSC11 0 1 C I 5

125.0000

+260

°C

40sec max.

ESD

HBM

Package

A: 7.0x5.0mm

B: 5.0x3.2mm

C: 3.2x2.5mm

Stability

1: ±50ppm

2: ±25ppm

5: ±10ppm

Freq (MHz)

125.0000

4000

400

1500

CDM

D: 2.5x2.0mm

N: 7.0x5.0mm (no center pad)

Note: 1000+ years of data retention on internal memory

Specifications

Parameter

Condition

Min.

Typ.

Max.

Unit

Supply Voltage¹

V_DD

I_DD

2.25

3.6

EN pin low – output is disabled

DSC1101

Supply Current

0.095

DSC1121

Frequency Stability

Ext Comm. & Ind. only

All temp ranges

Includes frequency variations due

to initial tolerance, temp. and

power supply voltage

±10

±25

±50

Δf

ppm

All temp ranges

Aging

Startup Time²

Δf

t_SU

1 year @25°C

T=25°C

±5

ppm

Input Logic Levels

Input logic high

Input logic low

V_IH

V_IL

0.75xV_DD

0.25xV_DD

Output Disable Time³

Output Enable Time

Enable Pull-Up Resistor⁴

t_DA

DSC1101

DSC1121

t_EN

Pull-up resistor exist

kΩ

CMOS Output

output is enabled

C_L=15pF, F₀=125 MHz

Supply Current⁴

I_DD

Output Logic Levels

Output logic high

Output logic low

Output Transition time³

Rise Time

V_OH

V_OL

I=±6mA

0.9xV_DD

0.1xV_DD

20% to 80%

C_L=15pF

t_R

t_F

1.1

1.3

Fall Time

All temp range except Auto

Auto temp range

2.3

170

100

Frequency

f₀

MHz

Output Duty Cycle

Period Jitter

SYM

J_PER

Fout=125MHz

ps_RMS

200kHz to 20MHz @ 125MHz

100kHz to 20MHz @ 125MHz

12kHz to 20MHz @ 125MHz

0.3

0.38

1.7

Integrated Phase Noise

J_PH

ps_RMS

Pin 6 V_DDshould be filtered with 0.1uf capacitor.

t_suis time to 100PPM of output frequency after V_DDis applied and outputs are enabled.

Output Waveform and Test Circuit figures below define the parameters.

Output is enabled if pad is floated or not connected.

______________________________________________________________________________________________________________________________________________

DSC1101 | DSC1121 Page 2 MK-Q-B-P-D-110410-01-6

Low-Jitter Precision CMOS Oscillator

DSC1101 DSC1121

Nominal Performance Parameters (Unless specified otherwise: T=25° C, V_DD=3.3 V)

50-mV

2.5

2.0

1.5

1.0

0.5

0.0

-10

-20

-30

-40

-50

-60

-70

-80

25MHz-CMOS

50MHz-CMOS

106MHz-CMOS

125MHz-CMOS

100-mV

0.1

100

1000

10000

Supply Noise Frequency (kHz)

200

400

600

800

1000

Low-end of integration BW: x kHz to 20 MHz

Power supply rejection ratio

Phase jitter (integrated phase noise)

Output Waveform

t_R

t_F

V_OH

Output

Enable

V_OL

t_EN

1/f_o

t_DA

V_IH

V_IL

Typical Termination Scheme

V_DD

0.1uF

C_LCMOS load

capacitance

______________________________________________________________________________________________________________________________________________

DSC1101 | DSC1121 Page 3 MK-Q-B-P-D-110410-01-6

Low-Jitter Precision CMOS Oscillator

DSC1101 DSC1121

Test Circuit

I_DD

0.1uF

V_DD

15pF

V_DA

Board Layout (recommended)

Solder Reflow Profile

20-40

Sec

260°C

MSL 1 @ 260°C refer to JSTD-020C

Ramp-Up Rate (200°C to Peak Temp) 3°C/Sec Max.

217°C

200°C

60-150

Sec

Preheat Time 150°C to 200°C

Time maintained above 217°C

Peak Temperature

Time within 5°C of actual Peak

Ramp-Down Rate

60-180 Sec

60-150 Sec

255-260°C

20-40 Sec

6°C/Sec Max.

8 min Max.

Reflow

60-180

Sec

150°C

Cool

Pre heat

Time 25°C to Peak Temperature

25°C

Time

8 min max

______________________________________________________________________________________________________________________________________________

DSC1101 | DSC1121 Page 4 MK-Q-B-P-D-110410-01-6

Low-Jitter Precision CMOS Oscillator

DSC1101 DSC1121

Package Dimensions

7.0 x 5.0 mm Plastic Package

EXTERNAL DIMENSIONS

Units: mm [ inches]

RECOMMENDED SOLDER PAD LAYOUT

Units: mm [ inches]

Via to Power

Via to Ground

Plane

1.4±0.10 [0.055±0.004]

Trace

2.54 [0.100]

5.08 [0.100]

7±0.10 [0.276±0.004]

5±0.10 [0.197±0.004]

2.8 [0.110]

1.4 [0.055]

No.

Pin Terminal

Enable

N/C

Ground

OUT

0.85±0.05

N/C

VDD

PAD

TIE TO GND

5.0 x 3.2 mm Plastic Package

EXTERNAL DIMENSIONS

Units: mm [ inches]

RECOMMENDED SOLDER PAD LAYOUT

Units: mm [ inches]

Via to Power

Trace

0.64±0.05

1.27 [0.050]

5±0.05 [0.197±0.002]

Via to Ground

2.54 [0.100]

Plane

1.2 [0.047] REF

0.7±0.1 [0.079±0.002]

3.2±0.05 [0.126±0.002]

1.1 [ 0.043]

No.

Pin Terminal

Enable

N/C

0.64 [0.025]

Ground

OUT

0.85±0.05

N/C

VDD

______________________________________________________________________________________________________________________________________________

DSC1101 | DSC1121 Page 5 MK-Q-B-P-D-110410-01-6

Low-Jitter Precision CMOS Oscillator

DSC1101 DSC1121

3.2 x 2.5 mm Plastic Package

EXTERNAL DIMENSIONS RECOMMENDED SOLDER PAD LAYOUT

Units: mm [ inches]

Via to Power

Trace

3.2±0.05 [0.126±0.002]

1.05 [0.041]

2.1[0.083]

Via to Ground

Plane

0.7±0.1 [0.079±0.002]

0.9 [0.035] REF

1 [ 0.039]

0.1[0.004] REF

2.5±0.05 [0.098±0.002]

0.9 [0.035]

0.9±0.05 [0.035±0.002]

0.5±0.05 [0.198±0.002]

No.

Pin Terminal

Enable

N/C

0.85±0.05

Ground

OUT

N/C

VDD

2.5 x 2.0 mm Plastic Package

EXTERNAL DIMENSIONS

Units: mm [ inches]

RECOMMENDED SOLDER PAD LAYOUT

Units: mm [ inches]

2.5±0.05 [0.098±0.002]

0.7±0.1 [0.079±0.002]

0.825 [0.032]

0.6 REF

Via to

Power Trace

1.65[0.064]

Via to Ground

Plane

0.535 REF

0.7 REF

0.7±0.1 [0.079±0.002]

0.765±0.1

2.0±0.05 [0.079±0.002]

0.65±0.05 [0.026±0.002]

0.25±0.05 [0.099±0.002]

0.85

0.65±0.05 [0.026±0.002]

No.

Pin Terminal

Enable

N/C

0.85±0.05

Ground

OUT

N/C

VDD

______________________________________________________________________________________________________________________________________________

DSC1101 | DSC1121 Page 6 MK-Q-B-P-D-110410-01-6

Low-Jitter Precision CMOS Oscillator

DSC1101 DSC1121

7.0 x 5.0 mm Plastic Package (no center pad)

EXTERNAL DIMENSIONS

Units: mm [ inches]

RECOMMENDED SOLDER PAD LAYOUT

Units: mm [ inches]

Via to Power

Via to Ground

Plane

1.4±0.10 [0.055±0.004]

Trace

2.54 [0.100]

5.08 [0.100]

7±0.10 [0.276±0.004]

5±0.10 [0.197±0.004]

1.4 [0.055]

No.

Pin Terminal

Enable

N/C

Ground

OUT

0.85±0.05

N/C

VDD

Disclaimer:

Micrel makes no representations or warranties with respect to the accuracy or completeness of the information furnished in this data sheet. This information is not intended as a

warranty and Micrel does not assume responsibility for its use. Micrel reserves the right to change circuitry, specifications and descriptions at any time without notice. No license,

whether express, implied, arising by estoppel or otherwise, to any intellectual property rights is granted by this document. Except as provided in Micrel’s terms and conditions of

sale for such products, Micrel assumes no liability whatsoever, and Micrel disclaims any express or implied warranty relating to the sale and/or use of Micrel products including

liability or warranties relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright or other intellectual property right.

Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product can reasonably be expected to

result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant into the body or (b) support or sustain life, and whose

failure to perform can be reasonably expected to result in a significant injury to the user. A Purchaser’s use or sale of Micrel Products for use in life support appliances, devices or

systems is a Purchaser’s own risk and Purchaser agrees to fully indemnify Micrel for any damages resulting from such use or sale.

MICREL, Inc.

Phone: +1 (408) 944-0800

●

2180 Fortune Drive,

Fax: +1 (408) 474-1000

San Jose, California

95131

●

USA

●

Email: hbwhelp@micrel.com

www.micrel.com

______________________________________________________________________________________________________________________________________________

DSC1101 | DSC1121 Page 7 MK-Q-B-P-D-110410-01-6

DSC1121BE5 [MICREL]

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