XR-C277 repeater equivalent, low-voltage pcm repeater.
The XR-C277 is a monolithic repeater circuit for PulseCode Modulated (PCM) telephone systems. It is designed to operate as a regenerative repeater at 1.544 Megabits per second (Mbps) data rate on T1-type PCM lines. It is packaged in a hermetic 16-Pi.
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