Microchip SY89829U Manual

Microchip Ikke kategoriseret SY89829U

Læs gratis den danske manual til Microchip SY89829U (7 sider) i kategorien Ikke kategoriseret. Denne vejledning er vurderet som hjælpsom af 15 personer og har en gennemsnitlig bedømmelse på 4.8 stjerner ud af 8 anmeldelser. Har du et spørgsmål om Microchip SY89829U, eller vil du spørge andre brugere om produktet?

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1
M9999-070104
hbwhelp@micrel.com or (408) 955-1690
GENERAL DESCRIPTION
■SY89829U dual 1:10 fanout buer
■Single +2.5V or +3.3V power supply
■AC-coupled conguration for ease-of-use
■I/O interface includes onboard termination
■Fully assembled and tested
■Can be recongured for DC-coupled operation
FEATURES
2.5/3.3V HIGH-PERFORMANCE,
DUAL 1:10 LVPECL FANOUT BUFFER
WITH 2:1 MUX INPUT
Precision Edge™
SY89829U
Evaluation Board
Rev.: A Amendment: /0
Issue Date: July 2004
The SY89829U evaluation board is designed for
convenient set-up and quick evaluation of the SY89829U. It
allows the user to evaluate the part over its full voltage-
range without requiring any modications to the board.
The evaluation board standard configuration is AC-
coupled for direct interface to a 50 compatible oscilloscopeΩ
without split supplies. For applications that require a DC-
coupled configuration, step-by-step instructions for modifying
the board are included.
The board is fully assembled and tested.
All data sheets and support documentation can be found
on Micrel’s web site at www.micrel.com.
EVALUATION BOARD
Precision Edge is a trademark of Micrel, Inc.
AC-Coupled Evaluation Board
Part Number Function Data Sheet Link
SY89829U 2.5/3.3V, High-Performance, Low-Voltage PECL Bus www.micrel.com/product-info/products/sy89829u.shtml
Clock Driver and Translator w/Internal Termination Data Sheet
RELATED PRODUCT AND SUPPORT DOCUMENTATION
2
SY89829U Evaluation BoardMicrel
M9999-070104
hbwhelp@micrel.com or (408) 955-1690
EVALUATION BOARD DESCRIPTION
Direct 50Ω Scope Interface: AC-Coupled Evaluation
Board
The SY89829U is packaged in a 64-pin EPAD-TQFP
with the EPAD attached to a metal pad on the component
side of the board for improved heat dissipation. The two
high-speed clock inputs, LVDS_CLK and LVPECL_CLK are
brought out to SMA connectors through matched length
differential traces. Both LVPECL_CLK inputs are AC-coupled
on the board and biased with Thevenin Equivalent resistor
networks to supply the correct bias for the LVDS and
LVPECL levels. Three of the outputs, Q0, Q10, and Q16
are brought out through SMA connectors from three sides
of the chip. These LVPECL outputs are AC-coupled for
direct connection to an oscilloscope with a standard 50Ω
termination to Ground. The LVTTL/CMOS control inputs
are connected to a dipswitch on the board to allow the
different modes to be conveniently selected.
DC-Coupled Evaluation Board
For DC-coupled operation, the board can be modied to
use a direct connection to the dierential inputs from a
signal source such as an Agilent 8133A signal generator.
The common mode voltage levels for the inputs would need
to be set differently for the LVDS and LVPECL inputs. These
levels are specied in the “DC-Coupled Evaluation Board
Set-up” section. The outputs will still be congured for AC-
coupled operation.
Step-by-step instructions for modifying an AC-coupled
evaluation board for DC-coupled operation are supplied in
“Modifying your AC-Coupled Board for DC-Coupled
Operation” section.
S13
S8
S9
S12
S6
64
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
63 62 61 60 59 58 57 56 55 54 53 52 51 50 49
17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
SEL2
LVDS_CLKB
/LVDS_CLKB
VCCI
LVDS_CLKA
/LVDS_CLKA
CLK_SEL1
LVPECL_CLKA
/LVPECL_CLKA
GND
OE1
LVPECL_CLKB
LVPECL_CLKB
CLK_SEL2
OE2
SEL1
VCCO
Q7
/Q7
Q8
/Q8
Q9
/Q9
VCCO
VCCO
Q10
/Q10
Q11
/Q11
Q12
/Q12
VCCO
S39
S38
VCCO
Q0
/Q0
Q1
/Q1
Q2
/Q2
Q3
/Q3
Q4
/Q4
Q5
/Q5
Q6
/Q6
VCCO
VCCO
/Q19
Q19
/Q18
Q18
/Q17
Q17
/Q16
Q16
/Q15
Q15
/Q14
Q14
/Q13
Q13
VCCO
S62S63
S2
S3
S5
S25S24
U1 SY89829U
S1
S2
S3
S4
S5
S6
V
CC
V
CCI
V
CCI
C29
0.01µF
C38
6.8µF
V
CCO
V
CCO
C28
0.01µF
C39
6.8µF
SW Dip-6
R1 R6–
10k
C5
C6
C7
C8
V
CC
R15
82.5
R17
130
V
CC
R16
82.5
R18
130
V
CC
R19
82.5
R21
130
V
CC
R20
82.5
R22
130
C9
0.1µF
C10
0.1µF
R30
180
R29
180
R30
180
R31
180
C12
0.1µF
C11
0.1µF
C16
0.1µF
C15
0.1µF
R37
180
R38
180
C3
C4
C1
C2
V
CCO
or V
CCI
C18, C20, C21, C22, C25,
C26, C27 are 0.1µF at power
pins 4, 17, 32, 33, 48, 49, 64
respectively.
Figure 1. AC-Coupled Evaluation Board Schematic
I/O VCCI VCCO GND
AC-Coupled Input/AC-Coupled Output +3.3V +3.3V 0V
Table 1. Evaluation Board Power Supply Connections

Produkt Specifikationer

Mærke: Microchip
Kategori: Ikke kategoriseret
Model: SY89829U

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