Product Summary

The MC145426P is a kind of universal digital-loop transceiver which provides 80 kbps full–duplex data communication over 26 AWG and larger twisted–pair cable up to two kilometers in distance. Intended primarily for use in digital subscriber voice/data telephone systems, the MC145426P can also be used in remote data acquisition and control systems. The MC145426P utilizes a 256 kilobaud modified differential phase shift keying burst modulation technique for transmission to minimize RFI/ EMI and crosstalk. Simultaneous power distribution and duplex data communication can be obtained using a single twisted–pair wire.

Parametrics

MC145426P absolute maximum ratings: (1)DC Supply Voltage VDD – VSS: – 0.5 to + 9.0 V; (2)Voltage, Any Pin to VSS V: –0.5 to VDD + 0.5 V; (3)DC Current, Any Pin (Excluding VDD, VSS): ± 10 mA; (4)Operating Temperature TA: – 40 to + 85℃; (5)Storage Temperature: – 85 to + 150 ℃.

Features

MC145426P features: (1)Provides Full–Duplex Synchronous 64 kpbs Voice/Data Channel and Two 8 kbps Signaling Data Channels Over One 26 AWG Wire Pair Up to Two Kilometers; (2)Compatible with Existing and Evolving Telephone Switch Architectures and Call Signaling Schemes; (3)Automatic Detection Threshold Adjustment for Optimum Performance Over Varying Signal Attenuations; (4)Protocol Independent; (5)Single 5 V Power Supply; (6)22–Pin PDIP, 24–Pin SOG Packages; (7)Application Notes AN943, AN949, AN968, AN946, and AN948; (8)Compatible with MC145500 Series PCM Codec–Filters; (9)Pin Controlled Loopback Feature; (10)Automatic Power–Up/Power–Down Feature; (11)On–Chip Data Clock Recovery and Generation; (12)Pin Controlled 500 Hz D3 or CCITT Format PCM Tone Generator for Audible Feedback Applications.

Diagrams

MC145426P block diagram

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