MSM6889 Datasheet, PDF (1/21 Pages) OKI electronic componets – Multi-Function Telecommunication LSI

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MSM6889
Multi-Function Telecommunication LSI
This version: J_Man_S. _M19₆9₈8₈₉
Previous version: Nov. 1996
GENERAL DESCRIPTION
The MSM6889 is best suited to be used as a signal transmitter/receiver LSI for a telemetering
system that employs a no-ringing communication system.
The meter terminal of a telemetering system consists of this device, meter, NCU, and
communication controller.
The MSM6889 contains a PB tone detector, a call progress tone (CPT) detector, a PB tone
generator, and a 300-bps full-duplex modem conforming to ITU-T V.21.
FEATURES
• Power supply : +5 V ±10%, +2.5 V or higher for digital interface.
• Power consumption
Operating mode : 9 mA Typ., 12 mA Max.
Power down mode : 0.1 mA Max.
• The operating mode can be selected from PB tone transmit, PB tone detect, and FSK modem
(answer/originate). The FSK modem cannot be operated concurrently with other functions.
Modem test modes are also available.
• The call progress tone (CPT) detector operates in PB tone transmit mode or in FSK modem
mode.
• PB receiver output is 3-state, and externally connectable to 4-bit input for PB tone generator
through the bus line.
• Modem transmit/receive data, carrier detect, request to send, and call progress tone detect
have their dedicated pins.
• Prefilter and smoothing filter are provided in analog input and output.
• On-chip 3.579545 MHz crystal oscillator
• 3.579545 MHz master clock output pin (CMOS compatible)
• Power down mode
• Modem : Conforms to ITU-T V.21 (300 bps, full-duplex)
• Transmit analog signals (modem signal, DTMF tone) : Level is independently adjustable
externally. Carrier detect level is also adjustable externally.
• Package options:
42-pin plastic DIP
(DIP42-P-600-2.54) (Product name : MSM6889RS)
56-pin plastic QFP (QFP56-P-1519-1.00-K) (Product name : MSM6889GS–K)
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