Preliminary and proprietary Information of YAMAR Electronics Ltd. Subject to change without notice.
Vdd
R8 R10 R7
100K100K100K
U1
14
13
12
11
10
9
8
INH
nSleep
nReset
Wake
MF1nF0
TxOn
RxOn
R6
100K
R5
100K
Data Out
Data/Command
Data In
Vdd
R11
NC
15
16
17
18
19
20
21
HDO
F1nF0
HDC
HDI
Vdd
DTxO
Gnd
SIG60
Test
Vdd
RxIn
RxN
TXO
Gnd
InterHop
EXP
7
6
5
4
3
2
1
EXP
VCC
C9 100p
C10
1n
D2
R16
680
BAS70-04
D3
C4
Powerline
560p/200V
OscO
OscIn
AGnd
F1B
F0B
AVdd
RxP
BAS70-04
22
23
24
25
26
27
28
R2 1K
X1
R1
1K
C1
*pF
4MHz
*pF
C2
1nF
C7
3
F0
R12
1K
C8
Vdd
R3
10
1nF
C5
1n
C6
10n
R13
1K
SFE6.5
3
F1
1
1
SFE5.5
C3
1n
Figure 3.3
–
SIG60 schematics example
* C1 and C2 values depend on crystal used. Usually values are between 0pF (NC) to 4.7pF.
3.1.1
Ceramic Filter Considerations
The SIG60 is designed to operate with one ceramic filter for transmission and reception. However, if
switching between two channels is desired, two ceramic filters are required. The minimum allowable
bandwidth of the ceramic filters is +/-70 kHz @ 3dB. Narrow bandwidth limits the maximal bit rate.
The SIG60 selectable frequencies meet market available ceramic filters. It is important to select the
widest bandwidth available.
Nominal
freq.
MHz
3 db BW
KHz min.
20db Insertion Stop band In/Out
BW
loss
attenuation imped.
KHz max.
dB max.
dB min.
Ohm
Murata
part #
Discrete
SFSL4.5MDB
SFSL5.5MDB
SFSL6.0MDB
SFSL6.5MDB
SFELF10M5JAA001-B0
Discrete filter for 115.2Kbps
SFELK13M0JA00-B0
Oscilent
part #
773-0045
773-0055
773-0060
773-0065
*1.75
4.50
5.50
6.00
6.50
**10.50
+/-70
+/-80
+/-80
+/-80
+/-150
750
750
750
800
6.0
6.0
6.0
6.0
4.5
30
30
30
30
1000
600
470
470
330
**13.00 280 +/-50
4.5
330
* 1.75MZ can operate only at 9.6Kbps
** 10.5MHz and 13.00MHz operates at 115.2Kbps instead of 9.6Kbps.
3.1.2
Communication performance
The maximal cable length between extreme devices depends mainly on the AC impedance of loads
connected to that line and number of nodes. The power cable length has less effect on communication.
The SIG60 needs at least 20mVpp for proper reception. Good communication should be achieved if the
transmitted signal can be seen on an oscilloscope at the receiving side within the line noise.
© 2010 Yamar Electronics Ltd.
6
DS-SIG60 R0.921
YAMAR [ YAMAR ELECTRONICS LTD. ]
