DB315A Datasheet, PDF (4/11 Pages) CML Microcircuits – Low Distortion Sinewave Output

CTCSS Encoder
4
2. Signal List
MX315A
Pins
J,P DW
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10 10
11
12
11 13
12 14
13 15
14 16
Signal
Name
D3
D2
D1
D0
D4
D5
V_SS
Xtal/Clock In
Xtal Output
Internal Connection
N/C
N/C
TX Tone Output
TX Enable Input
TX Enable Input
V_DD
Type
input
input
input
input
input
input
power
input
output
output
input
input
power
Description
D0-D5 are tone select inputs with internal pull-up resistors.
The logic combination at these inputs determines the encoded
CTCSS tone. See Table 1. The input sequence is not latched
and may be changed at any time. A logic “1” will be
programmed if the input is open circuit, allowing the use of
SPST switches.
Negative Supply Voltage.
This is the input to the CMOS inverter. It can be used in
conjunction with the Xtal output to form the active element in a
crystal oscillator circuit. Alternatively, a logic level 1MHz
frequency can be injected at this pin. However, the supply
voltage should never be applied without the input clock signal.
This is the output of the CMOS inverter. When used as a
crystal oscillator, track lengths and loading of this pin should be
minimized.
Do not use
No Connection
No Connection
This is the tone output pin. It includes a low impedance emitter
follower stage for sourcing sinusoidal tone. The tone is
generated about a DC level of approximately V_DD/2. The pin is
high impedance when not encoding.
This logic input has an internal pull-up resistor. A logic “0” at
this pin enables the MX315A.
This logic input has an internal pull-down resistor. A logic “1”
at this pin enables the MX315A.
Positive Supply Voltage.
Table 1: Signal List

1998 MXCOM, INC.
www.mxcom.com tel: [phone] 744 5050 fax: [phone]
Doc. # 20480054.006
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA All Trademarks and service marks are held by there respective companies.