Audio Scrambler and Sub-Audio Signalling Processor
CMX138A
5
External Components
TXENA
C14
C15
VDEC
SYSCLK
IRQN
R10
RDATA
SCLK
CDATA
DV
DD
CSN
DVDD
1
2
3
4
5
6
7
CMX138A
8
9
10
11
12
13
14
MICFB
AV
SS
R8
21
20
19
18
17
16
15
28
27
26
25
24
23
22
RXENA
CLKSEL
DVSS
DV
SS
AUXDAC
AVSS
AUDIO
DISCFB
DISCN1
DISCN2
VBIAS
AUXADC
AVDD
C5
MICP
MICN
R7
C3
C4 R5
C6
R6
R3
R4
C2
R12
AV
DD
R1
C1
AV
SS
C17
R2
R11
C16
C10
C13
C12
C11
C9
X1
DVSS
DVss
C8
R9 MOD
C7
Figure 2 CMX138A Recommended External Components
R1
R2
R3
R4
R5
R6
R7
X1
See note 3
100kΩ
100kΩ
100kΩ
100kΩ
100kΩ
100kΩ
6.144MHz
See note 1
R8
R9
R10
R11
R12
100kΩ
See note 3
10kΩ
10kΩ
10kΩ
C1
C2
C3
C4
C5
C6
C7
C8
See note 3
100nF
10µF
10nF
10nF
100pF
100pF
See note 3
C9
C10
C11
C12
C13
C14
C15
C16
C17
39pF
39pF
10µF
10nF
10nF
10µF
10nF
100nF
100pF
Resistors
±5%,
capacitors and inductors
±20%
unless otherwise stated.
Notes:
1
X1 can be a crystal or an external clock generator; this will depend on the application. The tracks
between the crystal and the device pins should be as short as possible to achieve maximum stability
and best start up performance.
©
2010 CML Microsystems Plc
Page 9
D/138A/2
CMLMICRO [ CML MICROCIRCUITS ]
