SY89467UHY Micrel Inc, SY89467UHY Datasheet

SY89467UHY

Manufacturer Part Number

SY89467UHY

Description

1:20 LVPECL Fanout W/ 2:1 FSI Input MUX

Manufacturer

Micrel Inc

Type

Fanout Buffer (Distribution), Multiplexerr

Series

Precision Edge®r

Datasheet

1.SY89467UHY.pdf (15 pages)

Specifications of SY89467UHY

Number Of Circuits

Ratio - Input:output

2:20

Differential - Input:output

Yes/Yes

Input

CML, LVDS, PECL

Output

LVPECL

Frequency - Max

2GHz

Voltage - Supply

2.375 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

2GHz

Number Of Clock Inputs

Mode Of Operation

Differential

Output Frequency

2000MHz

Output Logic Level

LVPECL

Operating Supply Voltage (min)

2.375V

Operating Supply Voltage (typ)

2.5/3.3V

Operating Supply Voltage (max)

3.6V

Package Type

TQFP EP

Operating Temp Range

-40C to 85C

Operating Temperature Classification

Industrial

Signal Type

CML/LVDS/PECL

Mounting

Surface Mount

Pin Count

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Other names

576-2085
SY89467UHY

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

SY89467UHY

Manufacturer:

MICREL

Quantity:

160

Company:

BOSTOCK HK LIMITED

Part Number:

SY89467UHY

Manufacturer:

Micrel Inc

Quantity:

10 000

Company:

BOSTOCK HK LIMITED

Part Number:

SY89467UHY TR

Manufacturer:

Micrel Inc

Quantity:

10 000

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Download datasheet (559Kb)

General Description

The SY89467U is a 2.5/3.3V, 1:20 LVPECL fanout

buffer with a 2:1 differential input multiplexer (MUX).

A unique Fail-Safe Input (FSI) protection prevents

metastable output conditions when the selected

input clock fails to a DC voltage (when voltage

between the pins of the differential input drops

significantly below 100mV).

The differential input includes Micrel’s unique, 3-pin

internal termination architecture that can interface to

any differential signal (AC- or DC-coupled) as small

as 100mV (200mV

termination resistor networks in the signal path. The

outputs are 800mV, LVPECL with fast rise/fall times

guaranteed to be less than 270ps.

The SY89467U 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

SY89467U 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

April 2008

Precision Edge is a registered trademark of Micrel, Inc.

MicroLeadFrame and MLF are registered trademarks of Amkor Technology, Inc.

Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

product line.

) without any level shifting or

Precision LVPECL 1:20 Fanout with 2:1 MUX

and Internal Termination with Fail-Safe Input

Features

• Selects between two inputs, and provides 20

• Fail-Safe Input

• Guaranteed AC performance over temperature and

• Ultra-low jitter design:

• Unique, patented MUX input isolation design

• Unique patented internal termination and VT pin

• Wide input voltage range: V

• 2.5V ±5% or 3.3V ±10% supply voltage

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

• Available in 64-pin TQFP package

Applications

• Fail-safe clock protection

• SONET clock distribution

• Backplane distribution

Markets

• LAN/WAN

• Enterprise servers

• ATE

• Test and measurement

precision LVPECL copies

– Prevents outputs from oscillating when input is

invalid

supply voltage:

– DC-to >1.5 GHz throughput

– < 1200ps Propagation Delay (In-to-Q)

– 270ps Rise/Fall times

– <1ps

– <10ps

– <0.7ps

minimizes adjacent channel crosstalk

accepts DC- and AC-coupled inputs (CML, PECL,

LVDS)

RMS

total jitter (clock)

random jitter

cycle-to-cycle jitter

MUX crosstalk induced jitter

SY89467U

hbwhelp@micrel.com

to GND

or (408) 955-1690

Precision Edge

M9999-040808-C

Related parts for SY89467UHY

SY89467UHY Summary of contents

Page 1

... Precision Edge is a registered trademark of Micrel, Inc. MicroLeadFrame and MLF are registered trademarks of Amkor Technology, Inc. Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com April 2008 ...

Page 2

... Tape and Reel. Pin Configuration April 2008 Operating Type Range Industrial Industrial = 25°C, DC Electricals Only. A 64-Pin EPAD-TQFP (T64-1) 2 Package Marking Finish SY89467UHY with Matte-Sn Pb-Free bar-line Indicator Pb-Free SY89467UHY with Matte-Sn Pb-Free bar-line Indicator Pb-Free M9999-040808-C hbwhelp@micrel.com or (408) 955-1690 SY89467U Lead ...

Page 3

Micrel, Inc. Pin Description Pin Number Pin Name Pin Function 1, 16, 23, 33 Positive Power Supply: Bypass with 0.1µF||0.01µF low ESR capacitors as close to the V VCC 41, 48, 58 pins as possible. 64, 63 Q0, /Q0 62, ...

Page 4

Micrel, Inc. Absolute Maximum Ratings Supply Voltage (V ) ..........................–0.5V to +4.0V CC Input Voltage (V ) ..................................–0. LVPECL Output Current (I ).................................... OUT Continuous ................................................. 50mA Surge........................................................ 100mA Current ( Source or sink on ...

Page 5

Micrel, Inc. LVPECL Outputs DC Electrical Characteristics V = 2.5V ±5% or 3.3V ±10 Symbol Parameter V Output HIGH Voltage OH V Output LOW Voltage OL V Output Voltage Swing OUT V Differential Output Voltage Swing DIFF_OUT LVTTL/CMOS ...

Page 6

Micrel, Inc. AC Electrical Characteristics V = 2.5V ±5% or 3.3V ±10 stated. Symbol Parameter f Maximum Operating Frequency MAX t Differential Propagation Delay pd IN-to-Q IN-to-Q SEL-to Set-up Time Hold Time H ...

Page 7

Micrel, Inc. Functional Description Clock Select (SEL) SEL is an asynchronous TTL/CMOS compatible input that selects one of the two input signals. An internal 25kΩ pull-up resistor defaults the input to logic HIGH if left open. Input switching threshold is ...

Page 8

Micrel, Inc. Timing Diagrams April 2008 Figure 1a. SEL-to-Q Delay Figure 1b. Fail-Safe Feature 8 SY89467U M9999-040808-C hbwhelp@micrel.com or (408) 955-1690 ...

Page 9

Micrel, Inc. April 2008 Figure 1c. Enable Output Timing Diagram Figure 1d. Propagation Delay Figure 1e. Setup and Hold Time 9 SY89467U M9999-040808-C hbwhelp@micrel.com or (408) 955-1690 ...

Page 10

Micrel, Inc. Typical Operating Characteristics V = 3.3V, GND = 0V 200mV April 2008 = 50Ω –2V 25°C, unless otherwise stated SY89467U M9999-040808-C hbwhelp@micrel.com or (408) 955-1690 ...

Page 11

Micrel, Inc. Functional Characteristics V = 3.3V, GND = 0V 100mV April 2008 = 50Ω -2V 25°C, unless otherwise stated SY89467U M9999-040808-C hbwhelp@micrel.com or (408) 955-1690 ...

Page 12

Micrel, Inc. Single-Ended and Differential Swings Figure 2a. Single-Ended Voltage Swing Input and Output Stages Figure 3a. Simplified Differential Input Stage April 2008 Figure 2b. Differential Voltage Swing Figure 3b. Simplified Differential Output Stage 12 hbwhelp@micrel.com SY89467U M9999-040808-C or (408) ...

Page 13

Micrel, Inc. Input Interface Applications Figure 4a. LVPECL Interface (DC-Coupled) Figure 4d. CML Interface (AC-Coupled) April 2008 Figure 4b. LVPECL Interface (AC-Coupled) Figure 4e. LVDS Interface (DC-Coupled) 13 SY89467U Option: may connect Figure 4c. CML ...

Page 14

Micrel, Inc. PECL Output Interface Applications PECL has a high input impedance, a very low output impedance (open emitter), and a small signal swing which results in low EMI. PECL is ideal for driving 50ohm and 100ohm-controlled transmission lines. There ...

Page 15

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

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