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FX805 View Datasheet(PDF) - CML Microsystems Plc

Part Name
Description
View to exact match
FX805
CML
CML Microsystems Plc CML
FX805 Datasheet PDF : 17 Pages
1 2 3 4 5 6 7 8 9 10 Next Last
Application Information
External Components
VDD
R7
SEE INSET XTAL 1
XTAL/CLOCK 2
ADDRESS SELECT
3
IRQ
4
SERIAL CLOCK
5
COMMAND DATA
6
CS
7
REPLY DATA
R 8 Tx SUB-AUDIO OUT 8
*
9
C 7 AUDIO IN
10
AUDIO OUT
11
12
VSS
FX805J
VSS
R6
C5
24
VDD
WAKE
23
NOTONE
22
COMPARATOR OUT
21
COMPARATOR IN (+)
20
C6
R4
VSS
C8
COMPARATOR IN (-)
19
18
VBIAS
Rx SUB-AUDIO OUT
17
C3 R3
Rx SUB-AUDIO IN
16
Rx AMP OUT
15
Rx AMP IN (+)
14
D1
D2
Rx AMP IN (-)
13
R2
R5
C4
INSET
C2
XTAL 1
X1 R 1
FX805J
2
XTAL/CLOCK
C1
V
SS
Component
R1 =
R2
R3
R4
R5
R6
R7
R8
Fig.2 Recommended External Components
Value
1.0M
360k
10.0k
150k
100k
150k
22.0k
360k
R9 =
R10
R11
C1
C2
C3
C4
C5
Fig.4
Fig.4
Fig.4
33.0pF
33.0pF
1.5µF
15.0µF
1.0µF
C6 = 1.0µF
C7
0.1µF
C8
1.0µF
C9
Fig.4
D1 silicon small sig
D2 silicon small sig
X1 fXTAL 4.00MHz
Notes on external components and connections
1. Xtal/clock circuitry components shown INSET are
recommended in accordance with CML Application Note
D/XT/2 December 1991. The DBS 800 System
Information Document contains additional notes on Xtal/
clock distribution and frequencies.
2. R8 is a System Component. Its value is chosen, for
example, with the FX806 Modulation Summing
Amplifier, to provide a sub-audio signal level of -11.0dB
to the system modulator.
3.
Components
R
6
and
C
6
are
NOTONE
timing
components.
4. R2 and R5 are dependant upon the input signal level.
Values given are for the specified composite signal.
5. R is used as the DBS 800 system common-pullup for
7
the “C-BUS” Interrupt Request (IRQ) line, the optimum
value of this component will depend upon the circuitry
connected to the IRQ line.
FX805 Rx LPF
17
16
C3
FX805
Rx AMP
14
Rx AMP IN
13
+
D.C. RESTORATION
15
R2
D2
Rx Sub-Audio Input
R5
C4
Fig.3 Employment of FX805 Input Components
FX805
COMPARATOR
HYSTERESIS
D1
VSS
R3
20
+
COMPARATOR IN
19
R4
21
COMPARATOR OUT
With reference to Figure 2, Figures 3 and 4 show in detail recommended alternative component configurations for the FX805.
4
 

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