sy89230u Micrel Semiconductor, sy89230u Datasheet

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sy89230u

Manufacturer Part Number
sy89230u
Description
3.2ghz Precision, Lvpecl ?3, ?5 Clock Divider
Manufacturer
Micrel Semiconductor
Datasheet

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General Description
The SY89230U is a precision, low jitter 3.2GHz ÷3,
÷5 clock divider with a LVPECL output. The
differential input includes Micrel’s unique, 3-pin
internal termination architecture that allows the input
to interface to any differential signal (AC- or DC-
coupled) as small as 100mV (200mV
level shifting or termination resistor networks in the
signal path. The outputs are 800mV, 100K-
compatible LVPECL with fast rise/fall times
guaranteed to be less than 200ps.
The SY89230U 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
SY89230U is part of Micrel’s high-speed, Precision
Edge
All support documentation can be found on Micrel’s
web site at: www.micrel.com.
Block Diagram
November 2007
Precision Edge is a registered trademark of Micrel, Inc.
MLF and MicroLeadFrame are registered trademarks of Amkor Technology.
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.
PP
) without any
Features
• Accepts a high-speed input and provides a precision
• Guaranteed AC performance over temperature and
• Ultra-low jitter design:
• Unique patented internal termination and VT pin
• Wide input voltage range V
• 800mV LVPECL output
• 45% to 55% Duty Cycle (÷ 3)
• 47% to 53% Duty Cycle (÷ 5)
• 2.5V ±5% or 3.3V ±10% supply voltage
• -40°C to +85°C industrial temperature range
• Available in 16-pin (3mm x 3mm) MLF
Applications
• Fail-safe clock protection
Markets
• LAN/WAN
• Enterprise servers
• ATE
• Test and measurement
3.2GHz Precision, LVPECL ÷3, ÷5 Clock
÷3 and ÷5 sub-rate, LVPECL output
supply voltage:
– < 850ps Propagation Delay (In-to-Q)
– < 200ps Rise/Fall times
– <1ps
– <1ps
– <10ps
– <0.7ps
accepts DC- and AC-coupled inputs (CML, PECL,
LVDS)
DC-to >3.2GHz throughput
RMS
RMS
PP
RMS
total jitter (clock)
random jitter
cycle-to-cycle jitter
MUX crosstalk induced jitter
SY89230U
hbwhelp@micrel.com
Divider
CC
to GND
®
or (408) 955-1690
Precision Edge
M9999-110507-A
package
®

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sy89230u Summary of contents

Page 1

... General Description The SY89230U is a precision, low jitter 3.2GHz ÷3, ÷5 clock divider with a LVPECL output. The differential input includes Micrel’s unique, 3-pin internal termination architecture that allows the input to interface to any differential signal (AC- or DC- coupled) as small as 100mV (200mV level shifting or termination resistor networks in the signal path ...

Page 2

... Ordering Information Part Number Package SY89230UMG MLF-16 (2) SY89230UMGTR MLF-16 Notes: 1. Contact factory for die availability. Dice are guaranteed Tape and Reel. Pin Configuration November 2007 Operating Type Range Industrial Industrial = 25°C, DC Electricals Only. A 16-Pin MLF 2 Package Marking 230U with Pb-Free bar-line Indicator ...

Page 3

Pin Description Pin Number Pin Name 1, 4 IN, / VREF- / VCC 12 GND, 10, 11, 14,15 Exposed Pad 16 DIV_SEL Truth Table November 2007 Pin ...

Page 4

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 ...

Page 5

LVPECL Outputs DC Electrical Characteristics V = 2.5V ±5% or 3.3V ±10 Symbol Parameter V Output HIGH Voltage Output LOW Voltage Output Voltage Swing OUT Differential Output ...

Page 6

AC Electrical Characteristics V = 2.5V ±5% or 3.3V ±10 Symbol Parameter f Maximum Input Operating MAX Frequency tw Minimum Pulse Width t Differential Propagation Delay pd In-to-Q /MR(H-L)-to-Q t Reset Recovery Time Set-up Time ...

Page 7

Functional Description Output Duty Cycle Equation For a non 50% input, derate the spec by: Divide 100 (0 x100 Divide 100 (0 x100, ...

Page 8

Timing Diagrams November 2007 Figure 1a. Propagation Delay 8 M9999-110507-A hbwhelp@micrel.com or (408) 955-1690 ...

Page 9

Figure 1b. Enable Output Timing Diagram Examples (divide by 3) November 2007 9 hbwhelp@micrel.com M9999-110507-A or (408) 955-1690 ...

Page 10

November 2007 Figure 1c. Divider Operation Timing Diagram 10 M9999-110507-A hbwhelp@micrel.com or (408) 955-1690 ...

Page 11

Typical Operating Characteristics V = 3.3V, GND = 0V ≤ 300ps Functional Characteristics V = 2.5V, GND = 0V 100mV Divide November 2007 = ...

Page 12

Single-Ended and Differential Swings Figure 2a. Single-Ended Voltage Swing Input and Output Stages Figure 3a. Simplified Differential Input Stage November 2007 Figure 2b. Differential Voltage Swing Figure 3b. Simplified Differential Output Stage 12 hbwhelp@micrel.com M9999-110507-A or (408) 955-1690 ...

Page 13

Input Interface Applications Figure 4a. LVPECL Interface (DC-Coupled) Figure 4d. CML Interface (AC-Coupled) November 2007 Figure 4b. LVPECL Interface (AC-Coupled) Figure 4e. LVDS Interface (DC-Coupled) 13 Option: may connect Figure 4c. CML Interface (DC-Coupled) M9999-110507-A ...

Page 14

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 50Ω- and 100Ω-controlled impedance transmission lines. There are ...

Page 15

Package Information MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http:/www.micrel.com The information furnished by Micrel in this data sheet is believed to be accurate and reliable. However, no ...

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