SL2304NZZC-1_技术文档

SL2304NZ

Low Jitter and Skew DC to 140MHz Clock Buffer

Key Features

Description

The SL2304NZ is a low skew, jitter and power fanout

Buffer designed to produce up to four (4) clock outputs

from one (1) reference input clock, for high speed clock

distribution, including PCI/PCI-X applications.

•

DC to 140 MHz operating frequency range

Low output clock skew: 50ps-typ

Low part-to-part output skew: 100 ps-typ

Low output propogation delay: 2.5ns-typ

3.3V +/-10% operation supply voltage

Low power dissipation:

The SL2304NZ products operate from DC to 140MHz.

The only difference between SL2304NZ-1 and SL2304NZ-

1Z is the OE logic implementation. Refer to the Available

OE Logic Configuration Table. 1

•

- 7 mA-typ at 33MHz

- 9 mA-typ at 66MHz

Refer to SL23EP04NZ products for DC to 220MHz-max

frequency range and 2.5V to 3.3V power supply operation,

improved skew, jitter and higher drive options.

- 12 mA-typ at 133MHz

•

One input to four output fanout buffer drivers

Output Enable (OE) control function

Available in 8-pin TSSOP package

Available in Commercial and Industrial grades

Available in Lead (Pb) free package

Benefits

•

Up to four (4) distribution of input clock

Low propogation delay

Low output-to-output skew

Low output clock Jitter

Applications

Low power dissipation

•

General Purpose PCI/PCI-X Clock Buffer

Printers, MFPs and Digital Copiers

PCs and Work Stations

Routers, Switches and Servers

Datacom and Telecom

High-Speed Digital Embeded Systems

Block Diagram

Logic

Control

OE

CLK1

CLK2

CLK3

CLK4

CLKIN

VDD

GND

Rev 2.1, May 6, 2008

Page 1 of 9

www.silabs.com

2400 West Cesar Chavez, Austin, TX 78701 1+(512) 416-8500

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SL2304NZ

Pin Configuration

CLKIN

OE

1

2

3

4

8

7

6

5

CLK4

CLK3

CLK1

GND

VDD

CLK2

8-Pin TSSOP

Pin Description

Pin Name

Pin Type

Pin Description

Number

1

CLKIN

Input

Reference Clock Input

2

3

4

5

6

7

8

OE

Output

Power

Output

Power

Input

Output Enable. Refer to the Table. 1 for Logic Table

Buffered Clock Output 1

Power Ground.

CLK1

GND

CLK2

VDD

Buffered Clock Output 2

3.3V Power Supply

CLK3

CLK4

Buffered Clock Output 3

Buffered Clock Output 4

Rev 2.1, May 6, 2008

Page 2 of 9

SL2304NZ

General Description

Output Clock Skew

The SL2304NZ is a low skew, jitter and power fanout

Buffer designed to produce up to four (4) clock outputs

from one (1) reference input clock, for high speed clock

distribution, including PCI/PCI-X applications.

All outputs should drive the similar load to achieve output-

to-output skew and input-to-output delay specifications as

given in the switching electrical tables.

Power Supply Range (VDD)

Input and output Frequency Range

The SL2304NZ is designed to operate 3.3V+/-10% (3.63V-

max to 2.97V-min) VDD power supply range. An internal

on-chip voltage regulator is used to provide to constant

power supply of 1.8V, leading to a consistent and stable

electrical performance in terms of skew and jitter. The

SL2304NZ I/O is powered by using VDD.

The input and output frequency is the same (1x) for

SL2304NZ-1 and SL2304NZ-1Z and operates from DC

to 140MHz clock range with up to 25pF output load.

OE (Output Enable) Function

The only difference between SL2304-1 and SL2304NZ-

1Z is the OE logic implementation. When OE=0,

SL2404NZ-1 outputs are disabled and outputs are at

Logic Low. In the case of SL2304NZ-1Z the outputs are

at High-Z. Refer to the Available OE Logic Configuration

Table. 1 below.

Refer to SL23EP04NZ products for DC to 220MHz-max

frequency range, 2.5V to 3.3V power supply operation,

improved skew, jitter and higher drive options.

Contact SLI for 1.8V power supply Fan-Out Buffer and

ZDB products.

SL2304NZ-1

SL2304NZ-1Z

CLKOUT [1:4]

CLKIN (Pin-1)

OE (Pin-2)

CLKOUT [1:4]

Low

High

Low

High

Low

High

Low

High

High-Z

Low

High

Table 1. Available SL2304 CLKIN and OE Logic Configurations

Rev 2.1, May 6, 2008

Page 3 of 9

SL2304NZ

Absolute Maximum Ratings (All Products)

Description

Supply voltage, VDD

Condition

Min

-0.5

0

Max

4.6

Unit

V

All Inputs and Outputs

VDD+0.5

70

Ambient Operating Temperature

Storage Temperature

In operation, C-Grade

In operation, I-Grade

°C

V

-40

85

No power is applied

-65

150

Junction Temperature

In operation, power is applied

–

125

Soldering Temperature

–

260

ESD Rating (Human Body Model)

ESD Rating (Charge Device Model)

ESD Rating (Machine Model)

JEDEC22-A114D

JEDEC22-C101C

JEDEC22-A115D

-4,000

-1,500

-200

4,000

1,500

200

V

Operating Conditions (C-Grade and VDD=3.3V)

Unless otherwise stated VDD= 3.3V+/- 10%, CL=15pF and Ambient Temperature range 0 to +70°C

Description

Operating Voltage

Symbol

VDD

Condition

VDD+/-10%

Min

2.97

0

Typ

3.3

–

Max

3.63

70

Unit

V

Operating Temperature

Input Capacitance

TA

Ambient Temperature

Pins 1 and 2

°C

VIH

–

3

5

pF

CL1

All outputs≤100MHz

All outputs≤140MHz

Input Clock Range

Input Clock Range, CL=30pF

–

30

pF

Output Capacitance

CL2

–

15

pF

Input Operating Frequency

CLKIN

CLKN2

DC

–

140

100

MHz

–

Rev 2.1, May 6, 2008

Page 4 of 9

SL2304NZ

DC Electrical Characteristics (C-Grade and VDD=3.3V)

Unless otherwise stated VDD= 3.3V+/- 10%, CL=15pF and Ambient Temperature range 0 to +70°C

Description

Input Low Voltage

Symbol

VINL

Condition

CLKIN and OE

Min

–

Typ

–

Max

Unit

V

0.8

Input High Voltage

Input Low Current

Input High Current

VINH

IINL

CLKIN and OE

0 < VIN < 0.8V

2.4V < VIN < VDD

IOL=24mA

2.0

-5

–

VDD+0.3

V

+/-2

–

5

µA

V

IINH

-5

VOL1

VOL2

VOH1

–

0.80

0.55

–

Output Low Voltage

Output High Voltage

IOL=12mA

–

V

IOH=-24mA

2.0

2.4

–

V

IOH=-12mA

–

V

CLKIN=33MHz

Power Supply Current

IDD1

IDD2

IDD3

–

7

9

11

14

18

mA

CL=0 (No load at outputs)

CLKIN=66MHz

CL=0 (No load at outputs)

CLKIN=133MHz

12

CL=0 (No load at outputs)

Switching Electrical Characteristics (C-Grade and VDD=3.3V)

Unless otherwise stated VDD= 3.3V+/- 10%, CL=15pF and Ambient Temperature range 0 to +70°C

Description

Symbol

FOUT1

Condition

Min

DC

Typ

–

Max

140

100

Unit

MHz

CL=15pF

CL=30pF

Output Frequency Range

DC

–

Measured at 0.8V to 2.0V

CL=15pF

Output Rise/Fall Time

tr/f-1

–

2.0

ns

Measured at 0.8V to 2.0V

CL=30pF

Output Rise/Fall Time

Input Duty Cycle

tr/f-2

DC1

DC2

–

50

–

2.4

80

55

ns

%

Measured at VDD/2

20

45

CL=15pF, Fout=140MHz

Measured at VDD/2

Output Duty Cycle

CL=30pF, Fout=100MHz

Measured at VDD/2

Output Duty Cycle

DC3

40

–

60

%

Measured at VDD/2 and

Output to Output Skew

SKW1

50

100

ps

Outputs are equally loaded

Measured at VDD/2 and

Part to Part Skew

SKW2

PDT

–

100

2.5

200

3.5

ps

ns

Outputs are equally loaded

Measured at VDD/2 from CLKIN to

Output Clock rising edge

Propagation Delay Time

1.5

Cycle-to-Cycle Jitter

CCJ1

CCJ2

CLKIN=66MHz and CL=15

CLKIN=133MHz and CL=15

–

75

50

150

100

ps

Rev 2.1, May 6, 2008

Page 5 of 9

SL2304NZ

Operating Conditions (I-Grade and VDD=3.3V)

Unless otherwise stated VDD= 3.3V+/- 10%, CL=15pF and Ambient Temperature range -40 to +85°C

Description

Operating Voltage

Symbol

VDD

Condition

VDD+/-10%

Min

2.97

-40

–

Typ

3.3

–

Max

3.63

85

Unit

V

°C

Operating Temperature

Input Capacitance

TA

Ambient Temperature

Pins 1 and 2

VIH

3

6

pF

CL1

All outputs≤100MHz

All outputs≤140MHz

Input Clock Range, CL=15pF

Input Clock Range, CL=30pF

–

30

pF

Output Capacitance

CL2

–

15

pF

Input Operating Frequency

CLKN1

CLKN2

DC

–

140

100

MHz

–

DC Electrical Characteristics (I-Grade and VDD=3.3V)

Unless otherwise stated VDD= 3.3V+/- 10%, CL=15pF and Ambient Temperature range -40 to +85°C

Description

Input LOW Voltage

Symbol

VINL

Condition

CLKIN and OE

Min

–

Typ

–

Max

Unit

V

0.8

Input HIGH Voltage

Input LOW Current

Input HIGH Current

VINH

IINL

CLKIN and OE

0 < VIN < 0.8V

2.4V < VIN < VDD

IOL=24mA

2.0

-6

–

VDD+0.3

V

+/-3

–

6

µA

V

IINH

-6

–

0.80

0.55

–

Output Low Voltage

Output High Voltage

VOL

VOH

IOL=12mA

–

V

IOH=-24mA

2.0

2.4

–

V

IOH=-12mA

–

V

CLKIN=33MHz

Power Supply Current

IDD1

IDD2

IDD3

–

8

12

15

20

mA

CL=0 (No load at outputs)

CLKIN=66MHz

10

14

CL=0 (No load at outputs)

CLKIN=133MHz

CL=0 (No load at outputs)

Rev 2.1, May 6, 2008

Page 6 of 9

SL2304NZ

Switching Electrical Characteristics (I-Grade and VDD=3.3V)

Unless otherwise stated VDD= 3.3V+/- 10%, CL=15pF and Ambient Temperature range -40 to +85°C

Description

Symbol

FOUT1

FOUT2

tr/f-1

Condition

Min

DC

–

Typ

Max

140

100

2.2

Unit

CL=15pF

CL=30pF

–

MHz

ns

Output Frequency Range

Output Rise/fall Time

Output Rise/Fall Time

Input Duty Cycle

CL=15pF, measured at 0.8V to 2.0V

CL=30pF, measured at 0.8V to 2.0V

Measured at VDD/2

tr/f-2

–

2.6

ns

DC1

20

80

%

CL=15pF, Fout=140MHz

Measured at VDD/2

Output Duty Cycle

Output to Output Skew

Part to Part Skew

DC2

DC3

45

40

–

55

60

%

CL=30pF, Fout=100MHz

Measured at VDD/2

Measured at VDD/2 and

SKW1

SKW2

60

120

240

ps

Outputs are equally loaded

Measured at VDD/2 and

–

Outputs are equally loaded

Measured at VDD/2 from CLKIN to

Output Clock rising edge and Outputs

are equally loaded

Propagation Delay Time

PDT

1.2

2.5

3.8

ns

Cycle-to-Cycle Jitter

CCJ1

CCJ2

CLKIN=66MHz and CL=15

CLKIN=133MHz and CL=15

–

80

60

160

120

ps

External Components & Design Considerations

Typical Application Schematic

1

6

3

5

7

CLK1

CLKIN

CL

CLK2

CLK3

VDD

CL

SL2304NZ

0.1μF

OE

2

8

CLK4

4

CL

GND

Recommendations

Decoupling Capacitor: A decoupling capacitor of 0.1μF must be used between VDD and VSS pins. Place the

capacitor on the component side of the PCB as close to the VDD pin as possible. The PCB trace to the VDD pin and

to the GND via should be kept as short as possible. Do not use vias between the decoupling capacitor and the VDD

pin.

Rev 2.1, May 6, 2008

Page 7 of 9

SL2304NZ

Package Outline and Package Dimensions

8-Pin TSSOP (4.4 mm)

8

5

6.250(0.246)

6.500(0.256)

4.300(0.169)

4.500(0.177)

Dimensions are in milimeters(inches).

Top line: (MIN) and Bottom line: (Max)

Pin-1 ID

1

4

2.900(0.114)

3.100(0.122)

1.100(0.043) MAX

0.250(0.010)

BSC

0.090(0.003)

0.200(0.008)

0.050(0.002)

0.150(0.006)

0.850(0.033)

0.950(0.037)

Gauge

Plane

0.076(0.003)

Seating Plane

0.500(0.020)

0.700(0.027)

0.190(0.007)

0.300(0.012)

0 to 8°

0.650(0.025)

BSC

Thermal Characteristics

Parameter

Symbol

Condition

Min

Typ

110

100

80

Max

Unit

°C/W

θ JA

Still air

-

Thermal Resistance

Junction to Ambient

1m/s air flow

3m/s air flow

Thermal Resistance

Junction to Case

θ JC

Independent of air flow

-

35

-

°C/W

Rev 2.1, May 6, 2008

Page 8 of 9

SL2304NZ

Ordering Information ^[1]

Ordering Number

Marking

Shipping

Package

Temperature

SL2304NZZC-1

SL2304NZZC-1T

SL2304NZZI-1

SL2304NZC-1

SL2304NZI-1

SL2304NZC-1Z

SL2304NZI-1Z

Tube

Tape and Reel

Tube

8-pin TSSOP

0 to 70°C

-40 to 85°C

0 to 70°C

SL2304NZZI-1T

SL2304NZZC-1Z

SL2304NZZC-1ZT

SL2304NZZI-1Z

SL2304NZZI-1ZT

Tape and Reel

Tube

Tape and Reel

Tube

0 to 70°C

-40 to 85°C

Tape and Reel

Notes:

1. The SL2304NZ products are RoHS compliant.

The information in this document is believed to be accurate in all respects at the time of publication but is subject to change without

notice. Silicon Laboratories assumes no responsibility for errors and omissions, and disclaims responsibility for any consequences

resulting from the use of information included herein. Additionally, Silicon Laboratories assumes no responsibility for the functioning

of undescribed features or parameters. Silicon Laboratories reserves the right to make changes without further notice. Silicon

Laboratories makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor

does Silicon Laboratories assume any liability arising out of the application or use of any product or circuit, and specifically disclaims

any and all liability, including without limitation consequential or incidental damages. Silicon Laboratories products are not designed,

intended, or authorized for use in applications intended to support or sustain life, or for any other application in which the failure of

the Silicon Laboratories product could create a situation where personal injury or death may occur. Should Buyer purchase or use

Silicon Laboratories products for any such unintended or unauthorized application, Buyer shall indemnify and hold Silicon

Laboratories harmless against all claims and damages.

Rev 2.1, May 6, 2008

Page 9 of 9


型号：	SL2304NZZC-1
厂家：	SILICON
描述：	Low Skew Clock Driver, 2304 Series, 4 True Output(s), 0 Inverted Output(s), PDSO8, TSSOP-8 驱动光电二极管逻辑集成电路
文件：	总9页 (文件大小：113K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

SL2304NZZC-1 [SILICON]

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