Description
LSI/CSI LS7501-7510 U ® L LSI Computer Systems, Inc.1235 Walt Whitman Road, Melville, NY 11747 (516) 271-0400 FAX (516) 271-0405 A3800 TONE ACT.
The LS7501 - LS7510 are CMOS frequency discriminator circuits designed to respond to a specific frequency TONE signa.
Features
* Circuit activated by Tone with specific Frequency and Time Duration.
* Frequency and Time Duration values are mask
programmable.
* Small Signal (as low as - 30 DBM) and Digital Level
Tone signals accommodated.
* On-chip active oscillator network and 32,768 Hz
Cryst
Applications
* Remote telephone line testing
* Remote meter reading
* Security system dialers. Nov. 1993
CONNECTION DIAGRAM - TOP VIEW STANDARD 16 PIN PLASTIC DIP
DTO 1 TIME BASE 2
VF OUT 3 VI OUT 4
FDEN 5 DTEN INPUT 6
LSI
16 V DD (+V) 15 X2 14 X1 13 DIGITAL TONE 12 AMP IN 11 AMP OUT