MX165C Ver la hoja de datos (PDF) - MX-COM Inc
Número de pieza
componentes Descripción
Lista de partido
MX165C Datasheet PDF : 15 Pages
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Low Voltage CTCSS Encoder/Decoder
6
External Components
VDD
C1
VDD 1
24
C2
XTAL/CLK
2
23
C3
X1 R1
XTAL
3
22
LOAD / LATCH 4
21
D5/SERIAL ENABLE 1
5
20
D4/SERIAL ENABLE 2
6
D3/SERIAL DATA IN
7
MX165C 19
18
D2/SERIAL CLOCK
8
17
D1
9
16
D0
10
15
VSS 11
14
DECODE COMPARATOR REF. 12
13
TONE IN
C4
RX AUDIO IN
C5
TX AUDIO IN
C10
VBIAS
C6
TX AUDIO OUT
C11
RX AUDIO OUT
C7
PTL
RX / TX
TONE OUT
C8
RX TONE DETECT
R2
DECODE COMPARATOR IN R3 D1
RX TONE DECODE
C9
MX165C
Figure 2 : Recommended External Components for Typical Application
R1 Note 1 4.7MΩ ±10%
R2
560kΩ ±10%
R3
820kΩ ±10%
C1
0.1µF ±20%
C2 Note 1 18pF ±20%
C3 Note 1 33pF ±20%
C4 Note 2 0.1µF ±20%
C5 Note 2 0.1µF ±20%
C6
0.47µF
±20%
C7 Note 2 0.1µF
±20%
C8 Note 2 0.1µF
±20%
C9 Note 2 0.1µF
±20%
C10 Note 2 0.1µF
±20%
C11 Note 2 0.1µF
±20%
D1
small signal
X1 Note 1 1MHz 100ppm max.
Table 2: External Components
External Components Notes:
1. The values specified for R1, C2, and C3 have been found to be satisfactory when used with a crystal (X1) whose
equivalent series resistance is ≤ 1000Ω. For best results, a crystal oscillator design should drive the clock inverter
input with signal levels of at least 40% of VDD, peak to peak. Tuning fork crystals generally cannot meet this
requirement. To obtain crystal oscillator design assistance, consult your crystal manufacturer.
2. The 0.1µF value for the DC Blocking capacitors, C4, C5, C7, C8, C9, C10, and C11 is not a requirement. For the
capacitors C4, C5, and C10, the input impedance is internal to the device and specified typical as 550kΩ. For the
remaining capacitors external circuits will be important in determining the input impedance.
© 1997 MX•COM Inc.
www.mxcom.com Tele: 800 638-5577 910 744-5050 Fax: 910 744-5054
Doc. # 20480102.008
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA All trademarks and service marks are held by their respective companies.
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