SY89828LHG Micrel Inc, SY89828LHG Datasheet

SY89828LHG

Manufacturer Part Number

SY89828LHG

Description

IC BUFFER DUAL 1:10 IVDS 64-TQFP

Manufacturer

Micrel Inc

Series

Precision Edge®r

Type

Fanout Buffer (Distribution), Multiplexer , Translatorr

Datasheets

1.SY89828LHY.pdf (13 pages)

2.SY89828LHG.pdf (13 pages)

Specifications of SY89828LHG

Number Of Circuits

Ratio - Input:output

2:10

Differential - Input:output

Yes/Yes

Input

LVDS, PECL

Output

LVDS

Frequency - Max

1GHz

Voltage - Supply

3 V ~ 3.6 V

Operating Temperature

-40°C ~ 85°C

Mounting Type

Surface Mount

Package / Case

64-TQFP Exposed Pad, 64-eTQFP, 64-HTQFP, 64-VQFP

Frequency-max

1GHz

Clock Ic Type

Clock Buffer

Frequency

1GHz

No. Of Outputs

Supply Current

45mA

Supply Voltage Range

3V To 3.6V

Digital Ic Case Style

TQFP

No. Of Pins

Operating Temperature Range

-40Â°C To

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

BOSTOCK HK LIMITED

Part Number:

SY89828LHG

Manufacturer:

Micrel Inc

Quantity:

10 000

Current page: 1 of 13
Download datasheet (172Kb)

Precision Edge is a trademark of Micrel, Inc.

FEATURES

APPLICATIONS

TYPICAL APPLICATION CIRCUIT

High-performance dual 1:10, 1GHz LVDS fanout

buffer/translator

Two banks of 10 differential LVDS outputs

Guaranteed AC parameters over temperature and

voltage:

• > 1GHz f

• < 50ps within device skew

• < 400ps t

Each bank includes a 2:1 input mux

2:1 mux input accepts LVDS and LVPECL

Low jitter performance

• < 1ps (rms) cycle-to-cycle jitter

• < 1ps (pk-pk) total jitter

3.3V supply voltage

Output enable function

LVDS input includes internal 100 termination

Available in a 64-Pin EPAD-TQFP

Enterprise networking

High-end servers

Communications

System using SY89828L as a switchover circuit from a Primary Clock to a Redundant backup Clock in a fail-safe application.

LVPECL inputs not shown in this application.

MAX

, t

time

Primary Clock Source

Backup Clock Source

/LVDS_CLKA

/LVDS_CLKB

LVDS_CLKA

LVDS_CLKB

3.3V 1GHz DUAL 1:10 PRECISION

LVDS FANOUT BUFFER/

TRANSLATOR WITH 2:1 INPUT MUX

Primary/Backup Clock Select

(Switchover with 2.0ns)

SEL1

differential LVDS (Low Voltage Differential Swing) output

pairs. The part is designed for use in low voltage 3.3V

applications that require a large number of outputs to drive

precisely aligned, ultra low-skew signals to their destination.

The input is multiplexed from either LVDS or LVPECL (Low

Voltage Positive Emitter Coupled Logic) by the CLK_SEL1

and CLK_SEL2 pins. The Output Enables (OE1 and OE2)

are synchronous so that the outputs will only be enabled/

disabled when they are already in the LOW state. This

avoids any chance of generating a runt clock pulse when

the device is enabled/disabled as can happen with an

asynchronous control.

than 50ps—performance previously unachievable in a

standard product having such a high number of outputs.

The SY89828L is available in a single space saving package,

enabling a lower overall cost solution.

DESCRIPTION

The SY89828L is a precision fanout buffer with 20

The SY89828L features a low pin-to-pin skew of less

100

Redundant

Primary

Card

Precision Edge™

Rev.: B

Issue Date: December 2002

SY89828L

Amendment: /1

FINAL

Related parts for SY89828LHG

SY89828LHG Summary of contents

Page 1

FEATURES High-performance dual 1:10, 1GHz LVDS fanout buffer/translator Two banks of 10 differential LVDS outputs Guaranteed AC parameters over temperature and voltage: • > 1GHz f MAX • < 50ps within device skew • < 400ps time ...

Page 2

Micrel PACKAGE/ORDERING INFORMATION SEL2 1 LVDS_CLKB 2 /LVDS_CLKB 3 VCCI 4 LVDS_CLKA 5 /LVDS_CLKA 6 CLK_SEL1 7 LVPECL_CLKA 8 /LVPECL_CLKA 9 GNDI 10 OE1 ...

Page 3

Micrel PIN DESCRIPTIONS Pin Number Pin Name 5, 6 LVDS_CLKA /LVDS_CLKA 2, 3 LVDS_CLKB /LVDS_CLKB 8, 9 LVPECL_CLKA /LVPECL_CLKA 12, 13 LVPECL_CLKB /LVPECL_CLKB 7 CLK_SEL1 14 CLK_SEL2 16 SEL1 1 SEL2 11 OE1 15 OE2 4 VCCI 17, 32, 40, ...

Page 4

Micrel Pin Number Pin Name 38, 36, 34, 30, 28 /Q10 – /Q19 26, 24, 22, 20, 18 Internal I/O Type P/U Pin Function Output LVDS Differential outputs (complement) from CLKA when SEL2 = LOW and from CLKB when SEL2 ...

Page 5

Micrel TRUTH TABLE (1) (1) (1) (1) OE1 OE2 SEL1 SEL2 CLK_SEL1 ...

Page 6

Micrel Absolute Maximum Ratings Power Supply Voltage ( .............. –0.5 to +4.0V CCI CCO Input Voltage (V ) ........................................... –0 Output Current (I ) ............................................... 10mA OUT Storage Temperature (T ) ........................... –65 to ...

Page 7

Micrel DC ELECTRICAL CHARACTERISTICS LVPECL Input : V = 3.3V 10 Symbol Parameter V Input HIGH Voltage (Single-Ended Input LOW Voltage IL V Minimum Input Swing (LVPECL_CLK Common Mode Range (LVPECL_CLK) Note 6 CMR ...

Page 8

Micrel AC ELECTRICAL CHARACTERISTICS V = 3.3V 10 – +85 C, unless noted Symbol Parameter f Maximum Toggle Frequency MAX t Differential Propagation Delay PHL t Note 3 PLH t Clock Input Switchover SWITCHOVER ...

Page 9

Micrel TYPICAL OPERATING CHARACTERISTICS (Conditions 3.3V unless otherwise stated Output Amplitude vs. Frequency 500 450 400 350 300 250 200 150 100 200 400 600 800 1000 1200 FREQUENCY ...

Page 10

Micrel FUNCTIONAL CHARACTERISTICS 155MHz Output 3.3V CC TIME (500ps/div 3.3V CC 1GHz Output 3.3V CC TIME (100ps/div.) 10 Precision ...

Page 11

Micrel LVPECL/LVDS INPUTS LVPECL_CLK 75k /LVPECL_CLK GND Figure 1. Simplified LVPECL Input Stage LVDS OUTPUTS LVDS stands for Low Voltage Differential Swing. LVDS specifies a small swing of 350mV typical nominal 1.25V common mode above ground. The common ...

Page 12

Micrel DETAILED DESCRIPTION The SY89828L is a precision dual 1:10 fanout buffer. It allows either LVPECL or LVDS inputs, selectable by an input muxes, and outputs 2 sets of 10 LVDS output pairs. The device features 2 synchronous output enables. ...

Page 13

Micrel 64 LEAD EPAD-TQFP (DIE UP) (H64-1) +0.03 –0.03 +0.012 –0.012 Heat Dissipation Package Notes: Note 1. Note 2. Note 3. MICREL, INC. 1849 FORTUNE DRIVE SAN JOSE, CA 95131 USA + 1 (408) 944-0800 TEL This information is believed ...

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