sy89874u Micrel Semiconductor, sy89874u Datasheet

sy89874u

Manufacturer Part Number

sy89874u

Description

Sy89874u 2.5ghz Any Diff. In-to-lvpecl Programmable Clock Divider/fanout Buffer With Internal Termination

Manufacturer

Micrel Semiconductor

Datasheet

1.SY89874U.pdf (10 pages)

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

sy89874uMG

Manufacturer:

Micrel Inc

Quantity:

1 884

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

sy89874uMI

Manufacturer:

MICREL

Quantity:

200

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Precision Edge is a registered trademark of Micrel, Inc.

Micro LeadFrame and MLF are trademarks of Amkor Technology, Inc.

M9999-031208

hbwhelp@micrel.com or (408) 955-1690

Micrel, Inc.

/RESET

FEATURES

APPLICATIONS

FUNCTIONAL BLOCK DIAGRAM

Integrated programmable clock divider and 1:2

fanout buffer

Guaranteed AC performance over temperature and

voltage:

• > 2.5GHz f

• < 250ps t

• < 15ps within device skew

Low jitter design:

• < 10ps

• < 1ps

Unique input termination and V

and AC-coupled Inputs; CML, PECL, LVDS and

HSTL

TTL/CMOS inputs for select and reset

100k EP compatible LVPECL outputs

Parallel programming capability

Programmable divider ratios of 1, 2, 4, 8 and 16

Low voltage operation 2.5V or 3.3V

Output disable function

–40 C to 85 C temperature range

Available in 16-pin (3mm x 3mm) MLF

SONET/SDH line cards

Transponders

High-end, multiprocessor sensors

/IN

REF-AC

RMS

Decoder

total jitter

cycle-to-cycle jitter

MAX

Enable

Divided

Enable

2, 4, 8

MUX

or 16

pin for DC-coupled

2.5GHz ANY DIFF. IN-TO-LVPECL

PROGRAMMABLE CLOCK DIVIDER/

FANOUT BUFFER WITH INTERNAL TERMINATION

MUX

package

/Q0

/Q1

high-speed (e.g., 622MHz or higher) CML, LVPECL, LVDS or

HSTL clock input signal and dividing down the frequency

using a programmable divider ratio to create a frequency-

locked, lower speed version of the input clock. Available divider

ratios are 2, 4, 8 and 16, or straight pass-through. In a typical

622MHz clock system this would provide availability of

311MHz, 155MHz, 77MHz or 38MHz auxiliary clock

components.

design that allows access to the termination network through

a V

different logic standards. A V

AC-coupled applications.

the pass-through function (divide by 1) the /RESET

synchronously enables or disables the outputs on the next

falling edge of IN (rising edge of /N).

DESCRIPTION

TYPICAL PERFORMANCE

This low-skew, low-jitter device is capable of accepting a

The differential input buffer has a unique internal termination

The /RESET input asynchronously resets the divider. In

pin. This feature allows the device to easily interface to

/Q0

/IN

LVDS

622MHz

Clock In

Translator/Divider

OC-12 to OC-3

Divide-by-4

155.5MHz Out

622MHz In

REF-AC

reference is included for

Precision Edge

Rev.: F

Issue Date: March 2008

Precision Edge

LVPECL

155.5MHz

Clock Out

SY89874U

Amendment: /0

SY89874U

Related parts for sy89874u

sy89874u Summary of contents

Page 1

... TYPICAL PERFORMANCE LVDS 622MHz Clock /Q0 MUX Q1 /Q1 /IN Q0 /Q0 1 Precision Edge ® SY89874U Precision Edge SY89874U ® Precision Edge reference is included for REF-AC OC-12 to OC-3 Translator/Divider LVPECL Divide-by-4 155.5MHz Clock Out 622MHz In 155.5MHz Out Rev.: F Amendment: /0 Issue Date: March 2008 ® ...

Page 2

... Precision Edge (1) Package Range Marking Industrial 874U Industrial 874U Industrial 874U with Pb-Free bar line indicator Industrial 874U with Pb-Free bar line indicator = Electricals only. A input. Flexible input accepts any T /2. CC ® SY89874U Lead Finish Sn-Pb Sn-Pb NiPdAu Pb-Free NiPdAu Pb-Free /2. CC ...

Page 3

... Do not apply T pin. T (Notes 1, 2) Min Typ Max V –1.145 V –1.020 –1.945 V –1.820 550 800 1050 1.10 1.60 2.10 ® SY89874U Units +0.3 V –0 –1.325 V Units –0.895 V –1.695 ...

Page 4

... IL Note 1. The circuit is designed to meet the DC specifications shown in the above table after thermal equilibrium has been established. Note 2. Specification for packaged product only. M9999-031208 hbwhelp@micrel.com or (408) 955-1690 (Notes 1, 2) Condition 4 ® Precision Edge SY89874U Min Typ Max Units 2.0 V 0.8 V –125 20 A –300 ...

Page 5

... Max 2.5 3.2 540 650 790 480 600 730 7 15 250 600 10 70 150 250 –2V, unless otherwise stated output edges will deviate by more V CC Swing OUT ® SY89874U Units GHz GHz RMS –T , jitter_cc n n+1 ...

Page 6

... INPUT SWING (mV 2.5GHz Output /Q Q TIME (100ps/div.) 6 ® Precision Edge SY89874U Propagation Delay vs. Temperature 800 700 600 500 400 -40 - 100 120 TEMPERATURE ( C) 1.25GHz Output TIME (200ps/div.) ...

Page 7

... V T GND 50 /IN Figure 2a. Simplified Differential Input Buffer M9999-031208 hbwhelp@micrel.com or (408) 955-1690 V V IN, OUT 800mV (typical) 1.86k 1.86k Figure 2b. Simplified TTL/CMOS Input Buffer 7 Precision Edge DIFF_IN DIFF_OUT 1600mV (typical) Figure 1b. Differential Swing V CC 25k /RESET R GND ® SY89874U ...

Page 8

... REF-AC Figure 3e. LVDS Input Interface Data Sheet Link http://www.micrel.com/product-info/products/sy89871u.shtml http://www.amkor.com/products/notes_papers/mlf_appnote_0902.pdf http://www.micrel.com/product-info/products/solutions.shtml 8 Precision Edge SY89874U PECL /IN SY89874U V –2V* GND CC VT 0.01µ REF- Bypass with 0.01µ Figure 3c. DC-Coupled PECL Input Interface ...

Page 9

... Figure 4b. Three-Resistor “Y–Termination” . For +3.3V systems For +2.5V systems mismatches +3.3V +3. +3.3V 130 1k 130 —2V 1. Figure 4d. Terminating Unused I/O 9 Precision Edge +3. — +3.3V “destination” (Optional —1. +3.3V ® SY89874U ...

Page 10

... PCB Thermal Consideration for 16-Pin MLF (Always solder, or equivalent, the exposed pad to the PCB (408) 474-1000 FAX Micrel for any damages resulting from such use or sale. © 2005 Micrel, Incorporated. 10 Package EP- Exposed Pad Die ® Package http://www.micrel.com WEB ® Precision Edge SY89874U ...

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