LS7502

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...