SY58029U_0708 Datasheet, PDF (1/11 Pages) Micrel Semiconductor – ULTRA PRECISION DIFFERENTIAL LVPECL 4:1 MUX with 1:2 FANOUT

Micrel, Inc.
ULTRA PRECISION DIFFERENTIAL
LVPECL 4:1 MUX with 1:2 FANOUT
and INTERNAL TERMINATION
Precision Edge^®
Precision E^Sd^Y5g⁸e^0®29U
SY58029U
FEATURES
„ Selects 1 of 4 differential inputs
„ Provides two copies of the selected input
„ Guaranteed AC performance over temperature and
voltage:
• DC-to-> 5Gbps data rate throughput
• < 390ps IN-to-Out t_pd
• < 110ps t_r / t_f times
„ Ultra low-jitter design:
• < 10ps_PP total jitter (clock)
• < 1ps_RMS random jitter
• < 10ps_PP deterministic jitter
• < 0.7ps_RMS crosstalk-induced jitter
„ Unique patended input design minimizes crosstalk
„ Accepts an input signal as low as 100mV
„ Unique patented input termination and V_T pin
accepts DC- and AC-coupled inputs (CML, LVPECL,
LVDS)
„ 800mV 100K LVPECL output swing
„ Power supply 2.5V ±5% or 3.3V ±10%
„ –40°C to +85°C temperature range
„ Available in 32-pin (5mm ∞ 5mm) MLF^® package
APPLICATIONS
Precision Edge^®
DESCRIPTION
The SY58029U is a 2.5V/3.3V precision, high-speed, 4:1
differential multiplexer with 100k LVPECL (800mV)
compatible outputs, capable of handling clocks up to 4GHz
and data streams up to 5Gbps. In addition, a 1:2 fanout
buffer provides two copies of the selected inputs.
The differential input includes Micrel’s unique, 3-pin input
termination architecture that allows customers to interface
to any differential signal (AC- or DC-coupled) as small as
100mV without any level shifting or termination resistor
networks in the signal path. The result is a clean, stub-free,
low-jitter interface solution. The outputs are 800mV LVPECL,
(100k temperature compensated) with extremely fast rise/
fall times guaranteed to be less than 110ps.
The SY58029U operates from a 2.5V ±5% supply or a
3.3V ±10% supply and is guaranteed over the full industrial
temperature range of –40°C to +85°C. For applications that
require CML outputs, consider the SY58028U. For 400mV
LVPECL outputs, consider the SY58030U. The SY58029U
is part of Micrel’s high-speed, Precision Edge^® product line.
All support documentation can be found on Micrel’s web
site at www.micrel.com.
„ Redundant clock and/or distribution
„ All SONET/SDH clock/data distribution
„ Loopback
„ All Fibre Channel distribution
„ All Gigabit Ethernet clock and/or data distribution
TYPICAL PERFORMANCE
2.5Gbps Output (2²³Ã1 PRBS)
FUNCTIONAL BLOCK DIAGRAM
IN0
50Ω
V_T0
50Ω
/IN0
V_REF-AC0
IN1
50Ω
V_T1
50Ω
/IN1
V_REF-AC1
IN2
50Ω
V_T2
50Ω
/IN2
V_REF-AC2
4:1
MUX
0
1
MUX
2
3
1:2
Fanout
Q0
/Q0
Q1
/Q1
TIME (100ps/div.)
Precision Edge is a registered trademark of Micrel, Inc.
MicroLeadFrame and MLF are registered trademarks of Amkor Technology, Inc.
IN3
50Ω
V_T3
50Ω
/IN3
V_REF-AC3
SEL0 (CMOS/TTL)
SEL1 (CMOS/TTL)
M9999-082707
[e-mail] or [phone]
1
Rev.: D Amendment: /0
Issue Date: August 2007