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PDF SY89853U Data sheet ( Hoja de datos )
| Número de pieza | SY89853U | |
| Descripción | Precision Low-Power Dual 2:1 LVPECL MUX | |
| Fabricantes | Micrel Semiconductor | |
| Logotipo |  |
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SY89853U
Precision Low-Power Dual 2:1 LVPECL MUX
with Internal Termination
General Description
The SY89853U features two, low jitter 2:1 differential
multiplexers with 100K LVPECL (800mV) compatible
outputs, capable of handling clocks up to 2.5GHz and
Features
Precision Edge®
data streams up to 2.5Gbps.
• Dual 2:1 MUX, each channel selects from inputs
The SY89853U differential inputs include Micrel’s
unique, 3-input termination architecture that allows
users to interface to any differential signal (AC- or DC-
Coupled) as small as 100mV without any level shifting
or termination resistors networks in the signal path. The
result is a clean, stub-free, low jitter interface solution.
The differential 800mV LVPECL outputs have fast
• Unique, patent-pending input isolation design
minimizes crosstalk
• Low power 210mW (VCC = 2.5V)
• Guaranteed AC performance over temperature and
voltage:
- DC-to->2.5Gbps data rate throughput
rise/fall times guaranteed to be less than 180ps.
- <360ps IN-to-Q tpd
The SY89853U operates from a 2.5V ±5% or a 3.3V
- <180ps tr/tf times
±10% supply, and is guaranteed over the full industrial • Ultra-low jitter design:
AsttSEehidlYtmaleg5tspea8ue®t0prwr2pape6owtrquUorwutrd.eid.rumTeocrhcaitceunframeghSmlei.egYcinhlo(8yte–m.a9r4t8.i0o5°n3CpUceartiofnsor+bpme8aa5rftn°oCcouef)n.,MdFiococnrroeMnla'sspicipdPrelericelr’asctiiswwotwiheonw.ebnDsataSheet•4U.com----VUTn<<<<i1011qpp.00ui7nsppepRss,asMPPpcRPPScaMedtrtSoeapetcnnttasretdlo-ropDjsmimetsCtinetna-jdriilstaik(tntcen-igcilrdno5jdcAit0kutCe)Ωcr-ecidnopujituptetlertedrimnpinuatstio(nCManLd,
LVDS, PECL)
• 800mV LVPECL output swing
• Power supply 2.5V ±5% or 3.3V ±10%
• –40°C to +85°C temperature range
• Available in 32-pin (5mm x 5mm) MLF® package
Applications
• Data communication systems
• All SONET OC-3 to OC-48 applications
• All Fibre Channel applications
• All GigE applications
Markets
• LAN/WAN communication
• Enterprise servers
• ATE
• Test and measurement
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
February 2007
M9999-022007-B
[email protected] or (408) 955-1690
1 page  
Micrel, Inc.
SY89853U
LVPECL Outputs DC Electrical Characteristics(5)
VCC = 2.5V ±5% or 3.3V ±10%; RL = 50Ω to VCC–2V; TA = –40°C to +85°C, unless otherwise noted.
Symbol Parameter
Condition
Min Typ Max
VOH Output High Voltage
(Q, /Q)
VCC–1.145
VCC–0.895
VOL Output Low Voltage
(Q, /Q)
VCC–1.945
VCC–1.695
VOUT
Output Voltage Swing
(Q, /Q)
See Figure 1a.
400 800
VDIFF-OUT Differential Output Voltage Swing See Figure 1b.
(Q, /Q)
800 1600
Units
V
V
mV
mV
LVTTL/CMOS DC Electrical Characteristics(5)
VCC = 2.5V ±5% or 3.3V ±10%; TA = –40°C to +85°C, unless otherwise noted.
Symbol Parameter
Condition
Min Typ Max
VIH Input High Voltage
VIL Input Low Voltage
IIH Input High Current
IIL Input Low Current
VIN = VCC
VIN = 0.5V
2.0
–300
0.8
75
Notes:
5. The circuit is designed to meet the DC specifications shown in the above table after thermal equilibrium has been established.
Units
V
V
µA
µA
February 2007
5 M9999-022007-B
[email protected] or (408) 955-1690
5 Page 
Micrel, Inc.
Output Interface Applications
LVPECL has high input impedance, very low output
(open emitter) impedance, and small signal swing,
which result in low EMI. LVPECL is ideal for driving
50Ω and 100Ω controlled impedance transmission
lines. There are different techniques for terminating
SY89853U
LVPECL outputs: Parallel Termination Thevenin-
Equivalent, Parallel Termination (3-resistor), and AC-
coupled termination. Unused output pairs may be left
floating; however, single-ended outputs must be
terminated or balanced.
Note:
1. For a 2.5V system, R1 = 250Ω, R2 = 62.5 Ω.
2. For a 3.3V system, R1 = 130Ω, R2 = 82Ω.
Figure 4a. Parallel Thevenin-Equivalent
Termination
Note:
1. For a 2.5V system, Rb = 19Ω.
2. For a 3.3V system, Rb = 50Ω.
Figure 4b. Parallel Termination
(3-Resistor)
Note:
For a 2.5V system, R = 50Ω.
Figure 4c. AC-Coupled Termination
Note:
For a 2.5V system, R1 = 250Ω, R2 = 62.5 Ω.
Figure 4d. Parallel Thevenin-Equivalent
Termination
Related Product and Support Documentation
Part Number
SY58026U
HBW Solutions
Function
5Gbps Dual 2 :1 400mV LVPECL MUX
with Internal Termination
MLF® Application Note
New Products and Applications
Data Sheet Link
www.micrel.com/product-info/products/sy58026u.shtml.
www.amkor.com/products/notes_papers/MLFAppNote.pdf
www.micrel.com/product-info/products/solutions.shtml
February 2007
11 M9999-022007-B
[email protected] or (408) 955-1690
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet SY89853U.PDF ] | |
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