sy89831u Micrel Semiconductor, sy89831u Datasheet

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sy89831u

Manufacturer Part Number
sy89831u
Description
Ultra-precision 1 4 Lvpecl Fanout Buffer/translator With Internal Termination
Manufacturer
Micrel Semiconductor
Datasheet

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Micrel, Inc.
Precision Edge is a registered trademark of Micrel, Inc.
MicroLeadFrame and MLF are registered trademarks of Amkor Technology, Inc.
M9999-052307
hbwhelp@micrel.com or (408) 955-1690
(TTL/CMOS)
FEATURES
APPLICATIONS
FUNCTIONAL BLOCK DIAGRAM
Guaranteed AC performance over temperature
and voltage:
• DC-to > 2.0GHz throughput
• <450ps propagation delay (IN-to-Q)
• < 20ps within-device skew
• < 225ps rise/fall time
Ultra-low jitter design:
• < 1ps
• < 1ps
• < 10ps
• < 10ps
Unique patent-pending input termination and VT pin
accepts DC- and AC-coupled differential inputs
800mV, 100K LVPECL output swing
Power supply 2.5V ±5% or 3.3V ±10%
Industrial temperature range: –40°C to +85°C
Available in 16-pin (3mm x 3mm) MLF
Processor clock distribution
SONET clock distribution
Fibre Channel clock distribution
Gigabit Ethernet clock distribution
VREF-AC
VT
/IN
IN
EN
50Ω
50Ω
RMS
RMS
PP
PP
total jitter (clock)
deterministic jitter
cycle-to-cycle jitter
random jitter
D
Q
1:4
®
package
ULTRA-PRECISION 1:4 LVPECL
FANOUT BUFFER/TRANSLATOR
WITH INTERNAL TERMINATION
Q0
/Q0
Q1
/Q1
Q2
/Q2
Q3
/Q3
1
1
LVPECL 1:4 fanout buffer optimized for ultra-low skew
applications. Within device skew is guaranteed to be less
than 20ps (5ps typ.) over supply voltage and temperature.
The differential input buffer has a unique internal termination
design that allows access to the termination network through
a VT pin. This feature allows the device to easily interface
to different logic standards. A VREF–AC reference output is
included for AC-coupled applications.
synchronization family. For applications that require a
different I/O combination, consult Micrel’s website at:
www.micrel.com, and choose from a comprehensive product
line of high-speed, low-skew fanout buffers, translators and
clock generators.
DESCRIPTION
TYPICAL PERFORMANCE
The SY89831U is a high-speed, 2GHz differential
The SY89831U is a part of Micrel's high-speed clock
/Q
Q
155MHz Output
TIME (1ns/div.)
Precision Edge
Rev.: E
Issue Date: May 2007
Precision Edge
Precision Edge®
SY89831U
T
V
V
V
A
CC
EE
IN
= 25°C
= 800mV
GND
= 3.3V
Amendment: /0
SY89831U
®
®

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sy89831u Summary of contents

Page 1

... VT pin. This feature allows the device to easily interface to different logic standards. A VREF–AC reference output is included for AC-coupled applications. The SY89831U is a part of Micrel's high-speed clock synchronization family. For applications that require a different I/O combination, consult Micrel’s website at: ® ...

Page 2

... CC . See “Input Interface Applications” section for more details (1) ( Precision Edge® SY89831U (1) Operating Package Range Marking Industrial 831U Industrial 831U Industrial 831U with Pb-Free bar-line indicator Industrial 831U with Pb-Free bar-line indicator = 25°C, DC Electricals only. ...

Page 3

... Ambient Temperature (T Package Thermal Resistance MLF™ (θ ) Still-Air ........................................................ 60°C/W JA (Ψ ) Junction-to-Board ...................................... 32°C .......................... ±2mA (4) Condition No load, max see Figure 1a. see Figure 1b. Condition 3 Precision Edge® SY89831U (2) ) ......................... –40°C to +85°C A (3) Min Typ Max Units 2.375 2.625 3.0 3 ...

Page 4

... The circuit is designed to meet the DC specifications shown in the above table after thermal equilibrium has been established. M9999-052307 hbwhelp@micrel.com or (408) 955-1690 (6) –2V –40°C to +85°C unless otherwise stated Condition See Figure 1a. See Figure 1b. (6) Condition 4 Precision Edge® SY89831U Min Typ Max Units V –1.145 V –0.895 –1.945 V – ...

Page 5

... Note 14 At full output swing. . MAX 23 –1 PRBS pattern. (device), no more than one output edge in 10 MAX Precision Edge® SY89831U Min Typ Max Units 2.0 2.5 GHz 390 ps 250 350 450 150 ps 300 ps 300 ...

Page 6

... Temperature 390 380 370 360 350 340 330 320 310 300 -40 - 100 TEMPERATURE (°C) 6 Precision Edge® SY89831U Propagation Delay vs. Input Voltage Swing 450 425 400 375 350 325 300 100 300 500 700 900 INPUT VOLTAGE SWING (V) ...

Page 7

... Micrel, Inc. FUNCTIONAL CHARACTERISTICS V = 3.3V, GND = 0V 800mV 50ý 155MHz Output /Q Q TIME (1ns/div.) M9999-052307 hbwhelp@micrel.com or (408) 955-1690 –2V 25°C, unless otherwise stated 1GHz Output /Q Q TIME (150ps/div.) 7 Precision Edge® SY89831U 622MHz Output TIME (200ps/div.) ...

Page 8

... Figure 1a. Single-Ended Swing INPUT AND OUTPUT STAGES V IN 50Ω 50Ω /IN SY89831U Figure 2a. Simplified Differential M9999-052307 hbwhelp@micrel.com or (408) 955-1690 V V IN, OUT 800mV (typical) CC Figure 2b. Simplified LVPECL Output Stage 8 Precision Edge® DIFF_IN DIFF_OUT 1.6V (typical) Figure 1b. Differential Swing SY89831U ...

Page 9

... VREF–AC 0.01µF For 2.5V 50ý pd For 3.3V 100ý pd Figure 3b. AC-Coupled LVPECL Input Interface LVDS /IN SY89831U VREF–AC Figure 3e. LVDS Interface 9 Precision Edge® SY89831U CML /IN SY89831U VREF-AC Figure 3c. DC-Coupled CML Input Interface ...

Page 10

... For +2.5V systems optional bypass capacitor intended to compensate for any t mismatches. Data Sheet Link www.micrel.com/product-info/products/sy89830u.shtml www.micrel.com/product-info/products/sy89832u.shtml www.micrel.com/product-info/products/sy89833u.shtml www.micrel.com/product-info/products/solutions.shtml www.amkor.com/products/notes_papers/MLF_AppNote_0301.pdf 10 Precision Edge® +3.3V +3. 50Ω 50Ω 50Ω 50Ω “destination” V 50Ω 0.01µF (optional 19ý. b SY89831U / ...

Page 11

... Exposed pads must be soldered to a ground for proper thermal management (408) 474-1000 FAX Micrel for any damages resulting from such use or sale. © 2005 Micrel, Incorporated. 11 Precision Edge® Package EP- Exposed Pad Die ® Package http://www.micrel.com WEB SY89831U ...

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