TONE ACTIVATED TELEPHONE LINE SWITCH CONTROLLERS
LSI/CSI
LS7501-7510
U ®
L
LSI Computer Systems, Inc. 1235 Walt Whitman Road, Melville, NY 11747 (516) 271-0400 FAX (...
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 ACTIVATED TELEPHONE LINE SWITCH CONTROLLERS
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
Crystal generates timing. Low power consumption. +4.0V to +6V operation (VDD - VSS).
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
GENERAL DESCRIPTION:
The LS7501 - LS7510 are CMOS frequency discriminator circuits designed to respond to a specific frequency TONE signa...
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