ACS8509 Semtech Corporation, ACS8509 Datasheet - Page 64

• Manufacturer Part Number: ACS8509
• Description: Synchronous Equipment Timing Source for Sonet or SDH Network Elements
• Manufacturer: Semtech Corporation

Figure 26 Simplified Application Schematic
Revision 2.00/January 2006 © Semtech Corp.
Application Information
ADVANCED COMMUNICATIONS
term_connect
Decoupling capacitor, C21 should be placed close to the xtal
pins that are being decoupled
CC parts are easily cut links that can also take SM
capacitors or Ohm resistor links.
All tcxo options to be placed as close as possible to IC1,
with short output track.
5v
0v
P1
BZV90C-5.6v
ZD1
VDD5v
(+)
100uF
C2
100nF
C21
C3
EZ1086CT-3.3
100nF
VDD
DGND
IC2
VIN
1
GND
10uF_TANT
3
2
3
12.8MHz
O2
O3
O4
DGND
Vectron
vdd
gnd1
txco
VOUT
2
C4
X1
VDD
(+)
DGND
5
4
1
output
gnd2
optn
100nF
VDDA
C7
VDDA
AGND
FrSync
AGND
10R
10R
R1
R6
DGND2
DGND3
100nF
DGND3
100nF
VDD2
VDD3
VDDA
AGND
C11
100nF
C12
MFrSync
C10
VDD3
DGND2
Power supply and ground
connections to 'star'
connect back to these
decoupling capacitors at
the regulator and only
connect together at this
point
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
DGND
1
2
3
4
5
6
7
8
9
VDD
AGND
TRST
IC
NC
AGND
VA1+
TMS
INTREQ
TCK
REFCLK
DGND
VD+
VD+
DGND
DGND
VD+
NC
IC
VA2+
AGND
TDO
IC
TDI
DGND
DGND
O1
FINAL
Page 64
DGND2
100nF
VDD2
C29
100nF
C15
ACS8509
IC1
DGND2
100nF
C9
VDD2
100nF
C32
Optional Processor/EPROM
interface type selection
VDD
Int
SYNC2K
DGND
UPSEL0 60
UPSEL1 59
UPSEL2 58
DGND
VDD
DGND 62
PORB 74
SEC4 56
SEC3 54
SEC2 51
WRB 71
RDY 75
RDB 72
VDD 61
CSB 70
ALE 73
C14
100nF
A0 69
A1 68
A2 67
A3 66
A4 65
A5 64
A6 63
IC 57
IC 55
IC 53
IC 52
RDY
ALE
RDB
SEC1
WRB
SEC2
CSB
DGND
C8
1nF
ACS8509 SETS
Optional EPROM interface
selection
SEC3
SEC4
VDD
100nF
DGND
C13
DGND
All decoupling capacitors, C29,
C9, C13, C14, C15, C6, C5,
C12, C11, C10,C32 should be
placed close to the IC1 pins that
are being decoupled
DATASHEET
www.semtech.com
UPSEL0
UPSEL1
UPSEL2
F8509D_031EvalBdSchem_01
Optional
Processor
interface type
selection