Microchip SY58035U Manual

Microchip Ikke kategoriseret SY58035U

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1
M9999-073010
hbwhelp@micrel.com or (408) 955-1690
DESCRIPTION
■Provides six ultra-low skew copies of the selected
input
■2:1 MUX input included for clock switchover
applications
■Guaranteed AC performance over temperature and
voltage:
• Clockfrequencyrange: DCto>4.5GHz
• <320psIN-to-OUTtpd
• <110pstr
/ tf times
• <20psskew(output-to-output)
■Ultra-low jitter design:
• 50fsRMSphasejitter(typ)
■Lowsupplyvoltageoperation: 2.5Vand3.3V
■UniqueinputterminationandVTpinacceptsDC-
coupledandAC-coupledinputs(CML,PECL,LVDS)
■Uniqueinputisolationdesignminimizescrosstalk
■100KLVPECLcompatibleoutputswing
■–40°Cto+85°Ctemperaturerange
■Availablein32-pin(5mmx5mm)MLF® package
FEATURES
4.5GHz,1:6LVPECLFANOUT
BUFFERWITH2:1 MUX INPUT
AND INTERNAL TERMINATION
Precision Edge®
SY58035U
APPLICATIONS
■Redundantclockdistribution
■AllSONET/SDHclock/datadistribution
■AllFibreChanneldistribution
■AllGigabitEthernetclockdistribution
The SY58035U is a 2.5V/3.3V precision, high-speed, 1:6
fanout capable of handling clocks up to 4.5GHz. A differential
2:1 MUX input is included for redundant clock switchover
applications.
The differential input includes Micrel’s unique, 3-pin input
termination architecture that allows the device 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 outputs are LVPECL (100K,
temperature compensated), with extremely fast rise/fall times
guaranteed to be less than 110ps.
The SY58035U 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 SY58034U or for 400mV
LVPECL outputs the SY58036U. The SY58035U 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.
FUNCTIONALBLOCKDIAGRAM
Precision Edge®
Q0
/Q0
Q1
/Q1
Q2
/Q2
Q3
/Q3
Q4
/Q4
Q5
/Q5
IN0
/IN0
V
T0
50Ω
50Ω
IN1
/IN1
V
T1
50Ω
50Ω
0
1
Mux
SEL
(TTL/CMOS)
S
V
REF-AC0
V
REF-AC1
2:1 Mux
1:6 Fanout
Rev.: F Amendment: /0
Issue Date: July 2010
Precision Edge is a registered trademark of Micrel, Inc.
MicroLeadFrame and MLF are registered trademarks of Amkor Technology, Inc.
2
Precision Edge®
SY58035U
Micrel, Inc.
M9999-073010
hbwhelp@micrel.com or (408) 955-1690
PACKAGE/ORDERINGINFORMATION
PinNumber PinName PinFunction
1, 4 IN0, /IN0 Differential Input: These input pairs are the differential signal inputs to the device. These
5, 8 IN1, /IN1 inputs accept AC- or DC-coupled signals as small as 100mV. Each pin of a pair internally
terminates to a VT pin through 50ý. Note that these inputs will default to an indeterminate
state if left open. Please refer to the “Input Interface Applications” section for more details.
2, 6 VT0, VT1 Input Termination Center-Tap: Each side of the differential input pair terminates to a VT
pin. The VT0 and VT1 pins provide a center-tap to a termination network for maximum
   interfaceexibility.See“InputInterfaceApplications”sectionformoredetails.
31 SEL This single-ended TTL/CMOS-compatible input selects the inputs to the multiplexer. Note
   thatthisinputisinternallyconnectedtoa25kΩpull-upresistorandwilldefaulttoalogic
HIGH state if left open. The MUX select switchover function is asynchronous.
10 NC No connect.
11, 16, 18, VCC Positive Power Supply: Bypass with 0.1µF || 0.01µF low ESR capacitors and place as
23, 25, 30 close to the VCC pin as possible.
29, 28 Q0, /Q0, Differential Outputs: These 100K (temperature compensated) LVPECL output pairs are
27, 26 Q1, /Q1, low skew copies of the selected input. Please refer to the “Truth Table” for details.
22, 21 Q2, /Q2,
20, 19 Q3, /Q3,
15, 14 Q4, /Q4,
13, 12 Q5, /Q5
9, 17, 24, 32 GND, Ground: Ground pin and exposed pad must be connected to the same ground plane.
Exposed Pad
3, 7 VREF-AC0 Reference Voltage: These output biases to V
CC–1.2V. It is used for AC-coupling inputs
VREF-AC1 (IN, /IN). Connect VREF-AC directly to the VT pin. Bypass with 0.01µF low ESR capacitor to
VCC. See “Input Interface Applications” section. Maximum sink/source current is ±1.5mA.
Due to the limited drive capability, the VREF-AC pin is only intended to drive its respective
VT pin.
PIN DESCRIPTION
24
23
22
21
20
19
18
17
GND
VCC
Q2
/Q2
Q3
/Q3
VCC
GND
IN0
VT0
VREF-AC0
/IN0
IN1
VT1
VREF-AC1
/IN1
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15 16
32 31 30 29 28 27 26 25
/Q0
Q0
VCC
SEL
GND
Q1
/Q1
VCC
Q5
/Q5
VCC
NC
GND
/Q4
Q4
VCC
32-PinMLF®(MLF-32)
TRUTHTABLE
SEL
0 IN0 Input Selected
1 IN1 Input Selected
Ordering Information(1)
Package Operating Package Lead
PartNumber Type Range Marking Finish
SY58035UMI MLF-32 Industrial SY58035U Sn-Pb
SY58035UMITR(2) MLF-32 Industrial SY58035U Sn-Pb
SY58035UMG(3) MLF-32 Industrial SY58035U with NiPdAu
Pb-Free bar-line indicator Pb-Free
SY58035UMGTR(2, 3) MLF-32 Industrial SY58035U with NiPdAu
Pb-Free bar-line indicator Pb-Free
Notes:
1. Contact factory for die availability. Dice are guaranteed at T
A = 25°C, DC electricals only.
2. Tape and Reel.
3. Pb-Free package recommended for new designs.

Produkt Specifikationer

Mærke: Microchip
Kategori: Ikke kategoriseret
Model: SY58035U

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