sy89851u Micrel Semiconductor, sy89851u Datasheet

sy89851u

Manufacturer Part Number

sy89851u

Description

Sy89851u Low Power, 3ghz, 1 2 Lvpecl Fanout Buffer/translator With Internal Termination

Manufacturer

Micrel Semiconductor

Datasheet

1.SY89851U.pdf (12 pages)

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General Description

The SY89851U is a low jitter, low skew, high-speed

1:2 differential fanout buffer optimized for precision

telecom

applications.

frequencies from DC to >3GHz, and data rates to

2.5Gbps guaranteed over temperature and voltage.

The SY89851U differential input includes Micrel's

unique, 3-pin input termination architecture that

directly interfaces to any differential signal (AC- or

DC-coupled) as small as 100mV (200mVpp) without

any level shifting or termination resistor networks in

the signal path. The outputs are 800mV, 100K-

compatible LVPECL with extremely fast rise/fall time

guaranteed to be less than 180ps.

The SY89851U operates from a 2.5V ±5% or 3.3V

±10% supply and is guaranteed over the full

industrial temperature range of –40°C to +85°C. The

SY89851U is part of Micrel's high-speed, Precision

Edge

All support documentation can be found on Micrel's

web site at www.micrel.com.

Functional Block Diagram

July 2005

Precision Edge is a registered trademark of Micrel, Inc.

MicroLeadFrame and MLF are trademarks of Amkor Technology, Inc.

product line.

and

The

enterprise

SY89851U

server

distributes

distribution

clock

Buffer/Translator with Internal Termination

Low Power, 3GHz, 1:2 LVPECL Fanout

Features

• Precision 1:2, 800mV LVPECL fanout buffer

• Low power consumption: 80mW typ. (2.5V)

• Guaranteed AC performance over temperature

• Ultra-low jitter design:

• Unique, patented input termination and VT pin

• 100K LVPECL-compatible outputs

• Power supply 2.5V ±5% or 3.3V ±10%

• –40°C to +85°C industrial temperature range

• Available in 16-pin (3mm x 3mm) MLF™ package

Applications

• All SONET and GigE clock distribution

• Fibre Channel applications

• Backplane distribution

• High-end, low skew, multiprocessor synchronous

and voltage:

– DC to >3GHz clock throughput

– <340ps propagation delay

– <180ps rise/fall time

– <20ps output-to-output skew

– <1ps

– <10ps

accepts DC- and AC-coupled inputs (CML,

LVPECL, LVDS)

clock distribution

RMS

deterministic jitter

total jitter (clock)

random jitter

SY89851U

hbwhelp@micrel.com

or (408) 955-1690

Precision Edge

M9999-071205

Related parts for sy89851u

sy89851u Summary of contents

Page 1

... The outputs are 800mV, 100K- compatible LVPECL with extremely fast rise/fall time guaranteed to be less than 180ps. The SY89851U operates from a 2.5V ±5% or 3.3V ±10% supply and is guaranteed over the full industrial temperature range of –40°C to +85°C. The SY89851U is part of Micrel's high-speed, Precision ® ...

Page 2

... Ordering Information Part Number Package Type SY89851UMG (2) SY89851UMGTR Notes: 1. Contact factory for die availability. Dice are guaranteed Tape and Reel. Pin Configuration July 2005 Operating Range MLF-16 Industrial MLF-16 Industrial = 25°C, DC Electricals only. A 16-Pin MLF™ (MLF-16) 2 Package Marking Lead Finish ...

Page 3

Pin Description Pin Number Pin Name 1,4 IN, / VREF-AC 5,8,13,16 VCC 12,11 Q0, /Q0, 9,10 Q1, /Q1 GND, 6,7,14,15 Exposed Pad July 2005 Pin Function Differential Inputs: This input pair is the differential signal input to ...

Page 4

Absolute Maximum Ratings Supply Voltage (V ) ..........................–0.5V to +4.0V CC Input Voltage (IN, /IN) .............................–0. LVPECL Output Current (I ) OUT Continuous ............................................... ±50mA Surge...................................................... ±100mA Termination Current Source or sink current Current ...

Page 5

LVPECL Output DC Electrical Characteristics V = 2.5V ±5% or 3.3V ±10 Symbol Parameter V Output HIGH Voltage OH (Q, /Q) V Output LOW Voltage OL (Q, /Q) V Output Voltage Swing OUT (Q, /Q) V Differential ...

Page 6

AC Electrical Characteristics V = 2.5V ±5% or 3.3V ±10 otherwise stated. Symbol Parameter Maximum Operating Frequency f MAX t Differential Propagation Delay pd ∆t t Tempco Temperature Coefficient pd pd Output-to-Output Skew t SKEW Part-to-Part Skew Data ...

Page 7

Typical Operating Characteristics V = 3.3V, GND = 0V 100mV (200mV CC IN July 2005 ), R = 50Ω –2V 25°C, unless otherwise stated M9999-071205 hbwhelp@micrel.com or (408) 955-1690 ...

Page 8

Functional Characteristics V = 3.3V, GND = 0V 100mV (200mV CC IN July 2005 ), R = 50Ω –2V 25°C, unless otherwise stated M9999-071205 hbwhelp@micrel.com or (408) 955-1690 ...

Page 9

Single-Ended and Differential Swings Figure 1a. Single-Ended Voltage Swing Timing Diagrams Input and Output Stages Figure 2a. Simplified Differential Input Stage July 2005 Figure 1b. Differential Voltage Swing Figure 2b. Simplified LVPECL Output Stage 9 hbwhelp@micrel.com M9999-071205 or (408) 955-1690 ...

Page 10

Input Interface Applications Figure 3a. LVPECL Interface (DC-Coupled) Figure 3d. CML Interface (AC-Coupled) July 2005 Figure 3b. LVPECL Interface (AC-Coupled) Figure 3e. LVDS Interface 10 Optional: may connect Figure 3c. CML Interface (DC-Coupled) M9999-071205 hbwhelp@micrel.com ...

Page 11

LVPECL Output Interface Applications LVPECL has high input impedance, very low output (open emitter) impedance, and small signal swing which result in low EMI. LVPECL is ideal for driving 50Ω- and 100Ω-controlled impedance transmission lines. There are several techniques for ...

Page 12

Package Information Package Notes: 1. Package meets Level 2 Moisture Sensitivity Classification. 2. All parts are dry-packaged before shipment. 3. Exposed pad must be soldered to a ground for proper thermal management. MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA ...

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