CAMPBELL, CALIF. Switch Power/MMC has introduced a family of dc/dc power-supply modules for multiplexed digital telephone systems using ringing subscriber line interface circuit ICs.
The company says its modules provide independently regulated dual outputs for talk and ring voltages and eliminate the large capacitors and inductors normally required to minimize noise.
The power-supply modules are priced at $7 per unit in 1,000-piece lots, with price breaks offered at higher quantities.
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EETInfo No. 655