SY89825UHG TR Micrel Inc, SY89825UHG TR Datasheet

IC BUS CLK DRVR LVPECL 64-TQFP

SY89825UHG TR

Manufacturer Part Number
SY89825UHG TR
Description
IC BUS CLK DRVR LVPECL 64-TQFP
Manufacturer
Micrel Inc
Series
Precision Edge®r
Type
Fanout Buffer (Distribution), Multiplexer , Translatorr
Datasheet
1.SY89825UHY.pdf (9 pages)

Specifications of SY89825UHG TR

Number Of Circuits
1
Ratio - Input:output
2:22
Differential - Input:output
Yes/Yes
Input
LVDS, LVPECL
Output
LVPECL
Frequency - Max
2GHz
Voltage - Supply
2.37 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
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
SY89825UHGTR
SY89825UHGTR
Micrel, Inc.
Precision Edge is a registered trademark of Micrel, Inc.
M9999-011907
hbwhelp@micrel.com or (408) 955-1690
FEATURES
LVPECL or LVDS input to 22 LVPECL outputs
100K ECL compatible outputs
LVDS input includes 100 termination
Guaranteed AC parameters over voltage:
• > 2GHz f
• < 35ps max. ch-ch skew
Low voltage operation: 2.5V, 3.3V
Temperature range: –40 C to +85 C
Output enable pin
Available in a 64-Pin EPAD-TQFP
APPLICATIONS
High-performance PCs
Workstations
Parallel processor-based systems
Other high-performance computing
Communications
MAX
(toggle)
2.5/3.3V 1:22 HIGH-PERFORMANCE,
LOW-VOLTAGE PECL BUS CLOCK DRIVER
& TRANSLATOR w/ INTERNAL TERMINATION
1
with 22 differential LVPECL output pairs. This part is
designed for use in low voltage (2.5V, 3.3V) applications
which 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 by the
CLK_SEL pin. The LVDS input includes a 100
termination, thus eliminating the need for external
termination. The Output Enable (OE) is synchronous so
that the outputs will only be enabled/disabled when they
are already in the LOW state. This eliminates any chance
of generating a runt clock pulse when the device is enabled/
disabled as can happen with an asynchronous control.
—performance previously unachievable in a standard
product having such a high number of outputs. The
SY89825U is available in a single space saving package
which provides a lower overall cost solution. In addition, a
single chip solution improves timing budgets by eliminating
the multiple device solution with their corresponding large
part-to-part skew.
DESCRIPTION
The SY89825U is a High Performance Bus Clock Driver
The SY89825U features low pin-to-pin skew (35ps max.)
Precision Edge
Rev.: D
Issue Date: January 2007
Precision Edge
Precision Edge
SY89825U
Amendment: /0
SY89825U
internal
®
®
®

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SY89825UHG TR Summary of contents

Page 1

Micrel, Inc. FEATURES LVPECL or LVDS input to 22 LVPECL outputs 100K ECL compatible outputs LVDS input includes 100 termination Guaranteed AC parameters over voltage: • > 2GHz f (toggle) MAX • < 35ps max. ch-ch skew Low voltage operation: ...

Page 2

Micrel, Inc. PACKAGE/ORDERING INFORMATION VCCO VCCI 4 LVDS_CLK 5 /LVDS_CLK 6 CLK_SEL 7 64-Pin LVPECL_CLK 8 EPAD-TQFP 9 /LVPECL_CLK ...

Page 3

Micrel, Inc. TRUTH TABLE (1) OE CLK_SEL Q – LOW 0 1 LOW 1 0 LVDS_CLK 1 1 LVPECL_CLK NOTE: 1. The OE (output enable) signal is synchronized with the low level of the LVDS_CLK and ...

Page 4

Micrel, Inc. DC ELECTRICAL CHARACTERISTICS Power Supply Symbol Parameter (1) V Power Supply CCI, V CCO (2) I Total Supply Current CC Notes and V must be connected together on the PCB such that they remain at the ...

Page 5

Micrel, Inc. AC ELECTRICAL CHARACTERISTICS V = 2.37V to 3.6V, GND = 0V CC Symbol Parameter (2) f Max Toggle Frequency MAX t Propagation Delay PHL (3) t (Differential) LVPECL IN PLH LVDS IN (4) t Within-Device Skew SKEW (5) ...

Page 6

Micrel, Inc. LVDS/LVPECL INPUTS V CC LVPECL_CLK 75k /LVPECL_CLK GND LVPECL Input Stage M9999-011907 hbwhelp@micrel.com or (408) 955-1690 75k 75k Figure 1. Simplified LVPECL & LVDS Input Stage 6 Precision Edge SY89825U V CC 1.9k 1.9k 1.9k 1. ...

Page 7

Micrel, Inc. TYPICAL CHARACTERISTICS Frequency Response vs. Output Amplitude 900 V = 2.5V SUP 800 V DIFFIN 700 600 500 400 300 200 100 FREQUENCY (MHz) Frequency Response vs. Output Amplitude @2.5V M9999-011907 hbwhelp@micrel.com or (408) 955-1690 = 800mV 7 ...

Page 8

Micrel, Inc. LVPECL TERMINATION RECOMMENDATIONS Output Considerations Be sure to properly terminate all outputs as shown below, or equivalent. For AC coupled applications Notes: 1. For +2.5V systems 250 R2 = 62.5 “source” Notes: 1. Power-saving alternative to ...

Page 9

Micrel, Inc. 64-PIN EPAD-TQFP (DIE UP) (H64-1) 12.00 0.472 10.00 4.50 0.177 64 +0.03 4.50 –0.03 +0.012 0.177 –0.012 0.047 MAX 1.20 0.01 0.004 MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA + 1 (408) ...

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