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SY89230U_10 Datasheet, PDF (1/15 Pages) Micrel Semiconductor – 3.2GHz Precision, LVPECL ÷3, ÷5 Clock Divider | |||
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SY89230U
3.2GHz Precision, LVPECL ÷3, ÷5 Clock
Divider
General Description
The SY89230U is a precision, low jitter 3.2GHz ÷3,
÷5 clock divider with a LVPECL output. The
differential input includes Micrelâs unique, 3-pin
internal termination architecture that allows the input
to interface to any differential signal (AC- or DC-
coupled) as small as 100mV (200mVPP) without any
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 â40°C to +85°C. The
SY89230U is part of Micrelâs high-speed, Precision
Edge® product line.
All support documentation can be found on Micrelâs
web site at: www.micrel.com.
Block Diagram
Features
Precision Edge®
⢠Accepts a high-speed input and provides a precision
÷3 and ÷5 sub-rate, LVPECL output
⢠Guaranteed AC performance over temperature and
supply voltage:
â DC-to >3.2GHz throughput
â < 850ps Propagation Delay (In-to-Q)
â < 200ps Rise/Fall times
⢠Ultra-low jitter design:
â <1psRMS random jitter
â <1psRMS cycle-to-cycle jitter
â <10psPP total jitter (clock)
â <0.7psRMS MUX crosstalk induced jitter
⢠Unique patented internal termination and VT pin
accepts DC- and AC-coupled inputs (CML, PECL,
LVDS)
⢠Wide input voltage range VCC to GND
⢠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) QFN package
Applications
⢠Fail-safe clock protection
Markets
⢠LAN/WAN
⢠Enterprise servers
⢠ATE
⢠Test and measurement
Precision Edge is a registered trademark of Micrel, 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
November 2007
M9999-110507-A
hbwhelp@micrel.com or (408) 955-1690
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