DB315A Datasheet, PDF (1/11 Pages) CML Microcircuits – Low Distortion Sinewave Output

DATA BULLETIN
MX315A
CTCSS Encoder
Features
 Field Programmable Tone
Encoder
 40 CTCSS Frequencies
 Crystal-Controlled Frequency
Stability
 Low Distortion Sinewave Output
 Few External Components
Required
 CMOS Low Power Requirements
Applications
 Mobile Radio Base Stations & Repeater
Stations
 Mobile Radios
 Hand-Held Radios
 Industrial Controls
 Intercom Systems
 Door-Entry Systems
Xtal/Clock
Xtal
D0-D5
TX Enable
TX Enable
Clock
Generator
Binary
Rate
Multiplier
Programmed Clocks
TX Tone
Square
V_DD
Wave
TX Tone
Sinewave
Output
Emitter
Follower
TX Tone Output
Enable
The MX315A is a monolithic CMOS tone encoder for sub-audible tone squelch systems, which provides three
additional frequencies over the earlier MX315A. These frequencies are 69.3, 97.4 and 206.5Hz. The tone
frequencies are derived from an input reference frequency. An on-chip inverter is provided to drive an
external crystal circuit.
Tone selection is achieved through six programming inputs and two control inputs (which allow either a logic
“1” or “0” to enable the device). A low distortion sinewave is generated at the TX Tone Output when the
MX315A is enabled. The emitter follower output stage can source 1mW directly into a 600 load (0dBm).
The MX315A is available in the following package styles: 16-pin SOIC (MX315ADW), 14-pin PDIP
(MX315AP) and 14-pin CDIP (MX315AJ).

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.